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  • 51. Bulut, Mehmet Börühan
    et al.
    Hills, Peter
    The University of Hong Kong.
    Mah, Daphne
    Baptist University of Hong Kong.
    Stigson, Peter
    Wallin, Fredrik
    A comparative study of key stakeholder views on smart homes in Hong Kong and SwedenManuskript (preprint) (Övrigt vetenskapligt)
  • 52.
    Bulut, Mehmet Börühan
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Odlare, Monica
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Stigson, Peter
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Vassileva, Iana
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Active buildings in smart grids - Exploring the views of the Swedish energy and buildings sectors2016Ingår i: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 117, s. 185-198Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The development of smart grids is expected to shift the role of buildings in power networks from passive consumers to active players that trade on power markets in real-time and participate in the operation of networks. Although there are several studies that report on consumer views on buildings with smart grid features, there is a gap in the literature about the views of the energy and buildings sectors, two important sectors for the development. This study fills this gap by presenting the views of key stakeholders from the Swedish energy and buildings sectors on the active building concept with the help of interviews and a web survey. The findings indicate that the active building concept is associated more with energy use flexibility than self-generation of electricity. The barriers to development were identified to be primarily financial due to the combination of the current low electricity prices and the high costs of technologies. Business models that reduce the financial burdens and risks related to investments can contribute to the development of smart grid technologies in buildings, which, according to the majority of respondents from the energy and buildings sectors, are to be financed by housing companies and building owners. 

  • 53.
    Bulut, Mehmet Börühan
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Odlare, Monica
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Stigson, Peter
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Vassileva, Iana
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Buildings in the future energy system: Perspectives of the Swedish energy and buildings sectors on current energy challenges2015Ingår i: Energy and Buildings, ISSN 0378-7788, E-ISSN 1872-6178, Vol. 107, s. 254-263, artikel-id Article number 6090Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Buildings are expected to play a key role in the development and operation of future smart energy systems through real-time energy trade, energy demand flexibility, self-generation of electricity, and energy storage capabilities. Shifting the role of buildings from passive consumers to active players in the energy networks, however, may require closer cooperation between the energy and buildings sectors than there is today. Based on 23 semi-structured interviews and a web survey answered by key stakeholders, this study presents the views of the energy and buildings sectors on the current energy challenges in a comparative approach. Despite conflicting viewpoints on some of the issues, the energy and buildings sectors have similar perspectives on many of the current energy challenges. Reducing CO2 emissions is a shared concern between the energy and buildings sectors that can serve as a departure point for inter-sectoral cooperation for carbon-reducing developments, including the deployment of smart energy systems. The prominent energy challenges were identified to be related to low flexibilities in energy supply and use, which limit mutually beneficial cases, and hence cooperation, between the energy and buildings sectors today.

  • 54.
    Bulut, Mehmet Börühan
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Buildings as components of smart grids - Perspectives of different stakeholders2014Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 61, s. 1630-1633Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper provides the perceptions of the energy and buildings sectors, municipalities and researchers in Sweden about active buildings that provide smart grid services to their inhabitants. As part of this study, we conducted 23 semi-structured interviews with key stakeholders to present the perspectives of stakeholders that are involved in the development process. Our study shows that there are several barriers to development of active buildings and points out the importance of energy policy mechanisms to support the development. It is necessary to introduce new measures in order to financially encourage the stakeholders and motivate the end-users to invest in smart grid technologies. The elimination of the intersectoral barriers and the promotion of cooperation amongst stakeholders could pave the way for a more efficient and smarter grid.

  • 55.
    Bulut, Mehmet Börühan
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Karlsson, Björn
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    The role of buildings in the energy system: Intersectoral barriers to future developments2013Ingår i: The role of buildings in the energy system - intersectoral barriers to future developments, 2013Konferensbidrag (Refereegranskat)
    Abstract [en]

    Residential energy consumption has a significant share in the final energy use in Sweden. Despite this relationship, it is hard to say that there is cooperation between the building and energy sectors for energy issues in buildings. In the grid of the future, buildings will no longer be a passive element of the electricity system; instead, they will acquire an active role in the operation of the grid. The cooperation between the building and energy sectors could play a key role for a successful development of smart grid technologies in buildings.In this paper, we describe the Swedish case and analyse the barriers to cooperation between the energy and building companies with the help of interviews with several stakeholders. This study showed that there is a demand for new business models in order to accommodate smart grid developments in buildings. Collective projects and new roles that reduce the power differences and barriers between the two sectors could contribute to the cooperation and support the development of future energy services in buildings.

  • 56.
    Bulut, Mehmet Börühan
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Stigson, Peter
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Vassileva, Iana
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Cooperation for climate-friendly developments: An analysis of the relationship between the energy and buildings sectors in Sweden2016Ingår i: Energy Efficiency, ISSN 1570-646X, E-ISSN 1570-6478, Vol. 9, nr 2, s. 353-370Artikel, forskningsöversikt (Refereegranskat)
    Abstract [en]

    Buildings account for more than 40 % of the total energy demand in the European Union (EU). The energy sector is responsible for 80 % of the total greenhouse gas emissions in the EU, of which more than a third are emitted as a result of energy use in buildings. Given these numbers and the large potential for energy savings in buildings, the energy and buildings sectors emerged as key contributors to fulfilling the European climate targets. Effective cooperation between these two key sectors can contribute significantly to the efficacy of the European climate strategy. However, there may be factors that negatively impact the relationship between the energy and buildings sectors and put cooperation in climate-friendly developments at risk. Based on 23 semi-structured interviews and a web survey answered by key stakeholders, this paper provides a snapshot of the current level of cooperation between the energy and buildings sectors in Sweden and identifies factors that impact the interdependencies between the two sectors.

    The findings show that the current business models in energy supply and the regulations in place limit the development of mutually beneficial cases between the energy and buildings sectors. This paper contributes to improved knowledge for policymaking that affects both sectors and highlights issues for further study.

  • 57.
    Campana, Pietro Elia
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    PV water pumping systems for agricultural applications2015Doktorsavhandling, sammanläggning (Övrigt vetenskapligt)
    Abstract [en]

    Grassland and farmland degradation is considered as one of the worst environmental and economic threats for China. The degradation process negatively affects food and water security, economy, society and climate changes.

    Photovoltaic water pumping (PVWP) technology for irrigation is an innovative and sustainable solution to curb the grassland degradation. At the same time it can promote the conservation of farmland, especially in remote areas of China. The combination of PVWP technology with water saving irrigation techniques and sustainable management of the groundwater resources can lead to several benefits. These include enhancing grassland productivity, halting wind and rainfall erosion, providing higher incomes and better living conditions for farmers.   

    This doctoral thesis aims to bridge the current knowledge gaps, optimize system implementation and prevent system failures. This work represents thus a step forward to solve the current and future nexus between energy, water and food security in China, using PVWP technology for irrigation.

    Models for the dynamic simulations of PVWP systems, irrigation water requirements (IWR) and crop response to water have been presented and integrated. Field measurements at a pilot PVWP system in Inner Mongolia have been conducted to analyse the reliability of the models adopted. A revision of the traditional design approaches and a new optimization procedure based on a genetic algorithm (GA) have been proposed to guarantee the match between IWR and water supply, to minimize the system failures and to maximize crop productivity and thus the PVWP system profitability and effectiveness.

    Several economic analyses have been conducted to establish the most cost effective solution for irrigation and to evaluate the project profitability. The possible benefits generated by the PVWP system implementation have been highlighted, as well as the effects of the most sensitive parameters, such as forage price and incentives. The results show that PVWP system represents the best technical and economic solution to provide water for irrigation in the remote areas compared to other traditional water pumping technologies. The environmental benefits have been also addressed, evaluating the CO2 emissions saving achievable from the PVWP system operation. The assessment of the feasible and optimal areas for implementing PVWP systems in China has been conducted using spatial analysis and an optimization tool for the entire supply chain of forage production. The results show that the potentials of PVWP systems in China are large. Nevertheless, the feasible and optimal locations are extremely sensitive to several environmental and economic para­meters such as forage IWR, groundwater depth, and CO2 credits that need to be carefully taken into account in the planning process.   

    Although this doctoral thesis has used China as case study, PVWP technology can be applied for irrigation purposes all over the world both for off- and on-grid applications leading to several economic and environmental benefits.

  • 58.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Cheng, Fu
    Ericson, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Andersson, Sandra
    Landelius, Tomas
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Modelling the diffuse component of solar radiation using artificial intelligence techniques2018Konferensbidrag (Refereegranskat)
  • 59.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Cioccolanti, Luca
    François, B.
    Jurasz, J.
    Zhang, Yang
    Stridh, Bengt
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    A Multi-Country Economic Analysis Of Lithium-Ion Batteries For Peak Shaving And Price Arbitrage In Commercial Buildings2018Konferensbidrag (Refereegranskat)
  • 60.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Holmberg, Aksel
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Pettersson, Oscar
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Klintenberg, Patrik
    Hangula, A.
    Namibia Energy Institute, Namibia University of Science and Technology, Windhoek, Namibia.
    Araoz, F. B.
    School of Chemical Science & Engineering, KTH Royal Institute of Technology, Teknikringen 42, Stockholm, Sweden.
    Zhang, Y.
    School of Chemical Science & Engineering, KTH Royal Institute of Technology, Teknikringen 42, Stockholm, Sweden.
    Stridh, Bengt
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. ABB AB, Corporate Research, Västerås, Sweden.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. School of Chemical Science & Engineering, KTH Royal Institute of Technology, Teknikringen 42, Stockholm, Sweden.
    An open-source optimization tool for solar home systems: A case study in Namibia2016Ingår i: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 130, nr 15, s. 106-118Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Solar home systems (SHSs) represent a viable technical solution for providing electricity to households and improving standard of living conditions in areas not reached by the national grid or local grids. For this reason, several rural electrification programmes in developing countries, including Namibia, have been relying on SHSs to electrify rural off-grid communities. However, the limited technical know-how of service providers, often resulting in over- or under-sized SHSs, is an issue that has to be solved to avoid dissatisfaction of SHSs’ users. The solution presented here is to develop an open-source software that service providers can use to optimally design SHSs components based on the specific electricity requirements of the end-user. The aim of this study is to develop and validate an optimization model written in MS Excel-VBA which calculates the optimal SHSs components capacities guaranteeing the minimum costs and the maximum system reliability. The results obtained with the developed tool showed good agreement with a commercial software and a computational code used in research activities. When applying the developed optimization tool to existing systems, the results identified that several components were incorrectly sized. The tool has thus the potentials of improving future SHSs installations, contributing to increasing satisfaction of end-users.

  • 61.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Jige Quan, S.
    Georgia Institute of Technology, US.
    Robbio, F.I.
    ABB AB, Västerås, Sweden.
    Lundblad, Anders
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH Royal Institute of Technology, Sweden.
    Zhang, Y.
    KTH Royal Institute of Technology, Sweden.
    Ma, Tao
    Shanghai Jiao Tong University, China.
    Karlsson, Björn
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Optimization of a residential district with special consideration on energy and water reliability2017Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 194, s. 751-764Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Many cities around the world have reached a critical situation when it comes to energy and water supply, threatening the urban sustainable development. From an engineering and architecture perspective it is mandatory to design cities taking into account energy and water issues to achieve high living and sustainability standards. The aim of this paper is to develop an optimization model for the planning of residential urban districts with special consideration of renewables and water harvesting integration. The optimization model is multi-objective which uses a genetic algorithm to minimize the system life cycle costs, and maximize renewables and water harvesting reliability through dynamic simulations. The developed model can be used for spatial optimization design of new urban districts. It can also be employed for analyzing the performances of existing urban districts under an energy-water-economic viewpoint.

    The optimization results show that the reliability of the hybrid renewables based power system can vary between 40 and 95% depending on the scenarios considered regarding the built environment area and on the cases concerning the overall electric load. The levelized cost of electricity vary between 0.096 and 0.212 $/kW h. The maximum water harvesting system reliability vary between 30% and 100% depending on the built environment area distribution. For reliabilities below 20% the levelized cost of water is kept below 1 $/m3 making competitive with the network water tariff.

  • 62.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Leduc, S.
    IIASA, Laxenburg, Austria.
    Kim, M
    Korea Univ., Seul, Korea.
    Liu, J.
    Beijing Forestry Univ, Peoples R China.
    Kraxner, F.
    IIASA, Laxenburg, Austria.
    McCallum, I.
    IIASA, Laxenburg, Austria.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH Royal Inst Technol, Stockholm.
    Optimal grassland locations for sustainable photovoltaic water pumping systems in China2015Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 75, s. 301-307Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Grassland is of strategic importance for food security of China because of the high number of livestock raised in those areas. Grassland degradation due to climate change and overgrazing is thus regarded as severe environmental and economic threat for a sustainable future development of China. Photovoltaic water pumping (PVWP) systems for irrigation can play an important role for the conservation of grassland areas, halting degradation, improving its productivity and farmers' income and living conditions. The aim of this paper is to identify the technically suitable grassland areas for the implementation of PVWP systems by assessing spatial data on land cover and slope, precipitation, potential evapotranspiration and water stress index. Furthermore, the optimal locations for installing PVWP systems have been assessed using a spatially explicit renewable energy systems optimization model based on the minimization of the cost of the whole supply chain. The results indicate that the PVWP-supported grassland areas show high potential in terms of improving forage productivity to contribute to supplying the local demand. Nevertheless, the optimal areas are highly sensitive to several environmental and economic parameters such as ground water depth, forage water requirements, forage price and CO2 emission costs. These parameters need to be carefully considered in the planning process to meet the forage yield potentials.

  • 63.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Leduc, S.
    Int Inst Appl Syst Anal, Laxenburg, Austria..
    Kim, M.
    Korea Univ, South Korea..
    Olsson, A.
    KTH Royal Inst Technol, Stockholm, Sweden..
    Zhang, J.
    Univ Maryland, USA..
    Liu, J.
    Int Inst Appl Syst Anal, Laxenburg, Austria.; South Univ Sci & Technol China, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China.;Beijing Forestry Univ, Sch Nat Conservat, Peoples R China..
    Kraxner, F.
    Int Inst Appl Syst Anal, Laxenburg, Austria..
    McCallum, I.
    Int Inst Appl Syst Anal, Laxenburg, Austria..
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Suitable and optimal locations for implementing photovoltaic water pumping systems for grassland irrigation in China2017Ingår i: APPLIED ENERGY, ISSN 0306-2619, Vol. 185, s. 1879-1889Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Grassland plays a key role for the food security of China because of the large number of livestock raised in those areas. Thus, grassland degradation due to climate change and overgrazing is considered as one of the most severe environmental and economic threat for the future sustainable development of China. Photovoltaic water pumping systems for irrigation can play a fundamental role for the conservation of grassland areas. This paper investigates the geospatial distribution of the technically suitable grassland locations for the implementation of photovoltaic water pumping systems. The technically suitable grassland areas were taken as starting point to assess the optimal locations. The assessment of the optimal locations was conducted using a spatially explicit optimization model of renewable energy systems based on the cost minimization of the whole forage supply chain. The results indicate that the photovoltaic water pumping systems provide high potential for improving forage productivity, contributing to meet the local demand. The optimal areas are highly sensitive to several environmental and economic parameters such as increased forage potential yield, forage management costs, forage water requirements, ground water depth, forage price and CO2 price. Most of the optimal areas are selected when the market forage price ranges from 300 to 500 $/tonne DM, indicating that the forage produced using PVWP technology for irrigation is already competitive compared to the imported forage.

  • 64.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Hao, Yong
    Jin, H.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Optimal C-PV/T system integrated in biomethane production2018Konferensbidrag (Refereegranskat)
  • 65.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH Royal Inst Technol, Stockholm, Sweden.
    Techno-economic feasibility of the irrigation system for the grassland and farmland conservation in China: photovoltaic vs. wind power water pumping2015Ingår i: Energy Conversion and Management, ISSN 0196-8904, Vol. 103, nr 6, s. 311-320Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Photovoltaic water pumping (PVWP) and wind power water pumping (WPWP) systems for irrigation represent innovative solutions for the restoration of degraded grassland and the conservation of farmland in remote areas of China. The present work systematically compares the technical and economic suitability of such systems, providing a general approach for the design and selection of the suitable technology for irrigation purposes. The model calculates the PVWP and WPWP systems sizes based on irrigation water requirement (IWR), solar irradiation and wind speed. Based on the lowest PVWP and WPWP systems components costs, WPWP systems can compete with PVWP systems only at high wind speed and low solar irradiation values. Nevertheless, taking into account the average specific costs both for PVWP and WPWP systems, it can be concluded that the most cost-effective solution for irrigation is site specific. According to the dynamic simulations, it has also been found that the PVWP systems present better performances in terms of matching between IWR and water supply compared to the WPWP systems. The mismatch between IWR and pumped water resulted in a reduction of crop yield. Therefore, the dynamic simulations of the crop yield are essential for economic assessment and technology selection.

  • 66.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zaccaria, Valentina
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zhang, Yang
    Stridh, Bengt
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Flexibility Services Provided by Building Thermal Inertia2018Konferensbidrag (Refereegranskat)
  • 67.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zhang, J.
    Institute of Water Resources and Hydropower Research, Beijing, China .
    Liu, J.
    Institute of Water Resources and Hydropower Research, Beijing, China .
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Economic optimization of photovoltaic water pumping systems for irrigation2015Ingår i: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 95, s. 32-41Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Photovoltaic water pumping technology is considered as a sustainable and economical solution to provide water for irrigation, which can halt grassland degradation and promote farmland conservation in China. The appropriate design and operation significantly depend on the available solar irradiation, crop water demand, water resources and the corresponding benefit from the crop sale. In this work, a novel optimization procedure is proposed, which takes into consideration not only the availability of groundwater resources and the effect of water supply on crop yield, but also the investment cost of photovoltaic water pumping system and the revenue from crop sale. A simulation model, which combines the dynamics of photovoltaic water pumping system, groundwater level, water supply, crop water demand and crop yield, is employed during the optimization. To prove the effectiveness of the new optimization approach, it has been applied to an existing photovoltaic water pumping system. Results show that the optimal configuration can guarantee continuous operations and lead to a substantial reduction of photovoltaic array size and consequently of the investment capital cost and the payback period. Sensitivity studies have been conducted to investigate the impacts of the prices of photovoltaic modules and forage on the optimization. Results show that the water resource is a determinant factor.

  • 68.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Olsson, A.
    KTH Royal Institute of Technology, Stockholm.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    An economic analysis of photovoltaic water pumping irrigation systems2016Ingår i: International Journal of Green Energy, ISSN 1543-5075, E-ISSN 1543-5083, Vol. 13, nr 8, s. 831-839Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    ABSTRACT: Irrigation using the photovoltaic water pumping (PVWP) systems represents a sustainable and attractive solution, which can combat Chinese grassland desertification and promote a sustainable development of the agricultural sector. This paper investigates the economics of PVWP systems taking into consideration the effects of the key components on the initial capital cost (ICC), life cycle cost (LCC), and revenues. Sensitivity analyses are conducted regarding the crop yield and price, cost of photovoltaic modules, and system components included in the ICC. Results show that the cost of the PVWP system is the most sensitive parameter affecting the ICC under the assumptions made, especially the cost of the PV modules; whereas, the crop production and price affect the net present value (NPV) and payback period (PBP) clearly. The PVWP has surplus power output when the crop water demand is low or it is non-irrigation season. The potential benefit from selling the surplus electricity is also discussed. In addition, the indirect benefits of carbon sequestration and CO2 emission reduction by applying PVWP systems are addressed in this paper.

  • 69.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Quan, S. J.
    Georgia Institute of Technology, USA.
    Robbio, F. I.
    ABB AB, Västerås, Sweden.
    Lundblad, Anders
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH Royal Institute of Technology, Sweden.
    Zhang, Y.
    KTH Royal Institute of Technology, Sweden.
    Ma, T.
    KTH Royal Institute of Technology, Sweden.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH Royal Institute of Technology, Sweden.
    Spatial optimization of residential urban district - Energy and water perspectives2016Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 88, s. 38-43Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Many cities around the world have reached a critical situation when it comes to energy and water supply, threatening the urban sustainable development. The aim of this paper is to develop a spatial optimization model for the planning of residential urban districts with special consideration of renewables and water harvesting integration. In particular, the paper analyses the optimal configuration of built environment area, PV area, wind turbines number and relative occupation area, battery and water harvester storage capacities, as a function of electricity and water prices. The optimization model is multi-objective which uses a genetic algorithm to minimize the system life cycle costs, and maximize renewables and water harvesting reliability. The developed model can be used for spatial optimization design of new urban districts. It can also be employed for analyzing the performances of existing urban districts under an energy-water-economic viewpoint. Assuming a built environment area equal to 75% of the total available area, the results show that the reliability of the renewables and water harvesting system cannot exceed the 6475 and 2500 hours/year, respectively. The life cycle costs of integrating renewables and water harvesting into residential districts are mainly sensitive to the battery system specific costs since most of the highest renewables reliabilities are guaranteed through the energy storage system.

  • 70.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Varini, Maria
    Chiche, Ariel
    Zhang, Y.
    Zhang, Chi
    Lundblad, Anders
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    High Share Renewable Islands Through Synergies Between Energy Networks2018Konferensbidrag (Refereegranskat)
  • 71.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology, Stockholm, Sweden.
    Wästhage, Louise
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Nookuea, Worrada
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Tan, Y.
    Royal Institute of Technology, Stockholm, Sweden.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology, Stockholm, Sweden.
    Optimization and assessment of floating and floating-tracking PV systems integrated in on- and off-grid hybrid energy systems2019Ingår i: Solar Energy, ISSN 0038-092X, E-ISSN 1471-1257, Vol. 177, s. 782-795Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Considering the targets of Thailand in terms of renewable energy exploitation and decarbonization of the shrimp farming sector, this work evaluates several scenarios for optimal integration of hybrid renewable energy systems into a representative shrimp farm. In particular, floating and floating-tracking PV systems are considered as alternatives for the exploitation of solar energy to meet the shrimp farm electricity demand. By developing a dynamic techno-economic simulation and optimization model, the following renewable energy systems have been evaluated: PV and wind based hybrid energy systems, off-grid and on-grid PV based hybrid energy systems, ground mounted and floating PV based hybrid energy systems, and floating and floating-tracking PV based hybrid energy systems. From a water-energy nexus viewpoint, floating PV systems have shown significant impacts on the reduction of evaporation losses, even if the energy savings for water pumping are moderate due to the low hydraulic head. Nevertheless, the study on the synergies between water for food and power production has highlighted that the integration of floating PV represents a key solution for reducing the environmental impacts of shrimp farming. For the selected location, the results have shown that PV systems represent the best renewable solution to be integrated into a hybrid energy system due to the abundance of solar energy resources as compared to the moderate wind resources. The integration of PV systems in off-grid configurations allows to reach high renewable reliabilities up to 40% by reducing the levelized cost of electricity. Higher renewable reliabilities can only be achieved by integrating energy storage solutions but leading to higher levelized cost of electricity. Although the floating-tracking PV systems show higher investment costs as compared to the reference floating PV systems, both solutions show similar competiveness for reliabilities up to 45% due to the higher electricity production of the floating-tracking PV systems. The higher electricity production from the floating-tracking PV systems leads to a better competitiveness for reliabilities higher than 90% due to lower capacity requirements for the storage systems.

  • 72.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yang, Z.
    KTH Royal Institute of Technology, Sweden.
    Anders, Lundblad
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH Royal Institute of Technology, Sweden.
    An Open-source Platform for Simulation and Optimization of Clean Energy Technologies2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 105, s. 946-952Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper is to describe an open-source code for optimization of clean energy technologies. The model covers the whole chain of energy systems including mainly 6 areas: renewable energies, clean energy conversion technologies, mitigation technologies, intelligent energy uses, energy storage, and sustainability. Originally developed for optimization of renewable water pumping systems for irrigation, the open-source model is written in Matlab® and performs simulation, optimization, and design of hybrid power systems for off-grid and on-grid applications. The model uses genetic algorithm (GA) as optimization technique to find the best mix among power sources, storage systems, and back-up sources to minimize life cycle cost, and renewable power system reliability. 

  • 73.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH Royal Inst Technol, Dept Chem Engn, Stockholm, Sweden..
    Zhang, J.
    Univ Maryland, Dept Geog Sci, College Pk, MD 20742 USA..
    Yao, T.
    Sci Syst & Applicat Inc SSAI, Lanham, MD 20706 USA.;NASA, Goddard Space Flight Ctr, Greenbelt, MD 20771 USA..
    Andersson, S.
    Swedish Meteorol & Hydrol Inst, SE-60176 Norrkoping, Sweden..
    Landelius, T.
    Swedish Meteorol & Hydrol Inst, SE-60176 Norrkoping, Sweden..
    Melton, F.
    NASA ARC CREST, Moffett Field, CA 94035 USA.;Calif State Univ Monterey Bay, Sch Nat Sci, Seaside, CA 93955 USA..
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH Royal Inst Technol, Dept Chem Engn, SE-10044 Stockholm, Sweden..
    Managing agricultural drought in Sweden using a novel spatially-explicit model from the perspective of water-food-energy nexus2018Ingår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 197, s. 1382-1393Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Using a multi-disciplinary approach, this paper integrated spatial analysis with agricultural and energy system modelling to assess the impacts of drought on crop water demand, water availability, crop yield, and electricity requirements for irrigation. This was done by a novel spatially-explicit and integrated water-food-energy nexus model, using the spatial climatic data generated by the mesoscale MESAN and STRANG models. In this study, the model was applied to quantify the effects of drought on the Swedish irrigation sector in 2013, a typical drought year, for a specific crop. The results show that drought can severely affect the crop yield if irrigation is not applied, with a peak yield reduction of 18 t/ha, about 50 % loss as compared to the potential yield in irrigated conditions. Accordingly, the water and energy requirements for irrigation to halt the negative drought effects and maintain high yields are significant, with the peaks up to 350 mm and 700 kWh per hectare. The developed model can be used to provide near real-time guidelines for a comprehensive drought management system. The model also has significant potentials for applications in precision agriculture, especially using high-resolution satellite data.

  • 74.
    Campana, Pietro Elia
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zhang, Jie
    Yao, Tian
    Andersson, Sandra
    Landelius, Tomas
    Melton, Forrest
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Modelling the water-food-energy nexus during agricultural drought in Sweden2018Konferensbidrag (Refereegranskat)
  • 75.
    Campillo, Javier
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Danilov, D. L.
    University of Technology Eindhoven, Eindhoven, MB, Netherlands.
    Ghaviha, Nima
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Notten, P. H. L.
    University of Technology Eindhoven, Eindhoven, MB, Netherlands.
    Zimmerman, Nathan
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Battery technologies for transportation applications2016Ingår i: Technologies and Applications for Smart Charging of Electric and Plug-in Hybrid Vehicles, Springer International Publishing , 2016, s. 151-206Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [en]

    More than a fifth of the greenhouse emissions produced worldwide come from the transport sector. Several initiatives have been developed over the last few decades, aiming at improving vehicles’ energy conversion efficiency and improve mileage per liter of fuel. Most recently, electric vehicles have been brought back into the market as real competitors of conventional vehicles. Electric vehicle technology offers higher conversion efficiencies, reduced greenhouse emissions, low noise, etc. There are, however, several challenges to overcome, for instance: improving batteries’ energy density to increase the driving range, fast recharging, and initial cost. These issues are addressed on this chapter by looking in depth into both conventional and non-conventional storage technologies in different transportation applications. 

  • 76.
    Campillo, Javier
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Vassileva, Iana
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Technology capacity assessment tool for developing city action plans to increase efficiency in mid-sized cities in Europe2016Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 88, s. 16-22Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Transition towards energy efficient cities requires an effective upgrade of all the different areas of urban energy production, distribution and use. The paper presents a method for collecting the information required for analysing the technical variation of strengths and weaknesses in infrastructure capabilities in European medium-sized cities, as well as to help identify best practices and tools for enhancing the energy performance of city energy systems.

  • 77.
    Campillo, Javier
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Vassileva, Iana
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Lundström, Lukas
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Thyghesen, Richard
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Beyond the building–understanding building renovations in relation to urban energy systems2016Ingår i: Journal of Settlements and Spatial Planning, ISSN 2069-3419, Vol. 2016, nr Spec. Iss. 5, s. 31-39Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    About 35% of Europe’s building stock is over 50 years old and consumes about 175 kWh/m2 for heating, between 3-5 times the amount required by the newly constructed buildings. Annually, between1 and 1.5% new buildings are built and only between 0.2 and 0.5% are removed, therefore the focus needs to be put on the renovation of the existing building stock. The implementation of energy conservation measures (ECMs) in the residential sector becomes a very important strategy to meet the EU´s 20% energy consumption reduction of the 20-20-20 goals. The main challenge, however, is to determine which of the ECMs strategies are the best to provide not just with the best energy consumption reduction, but also with the best environmental impact and economic benefits. This paper addresses this issue and analyses the impact of different ECMs by focusing not only on the buildings themselves, but on the energy supply network and the overall energy system as a whole. To achieve this, we review five case studies in Sweden that use different ECMs as well as other alternatives, such as: distributed generation (DG) and energy storage. Results suggest that although there is no standard protocol that would fit all renovation projects, the existing methodologies fall short to provide the best overall impact on the energy system and that a broader analysis of the local conditions should be carried out before performing large building renovation projects.

  • 78.
    Celis, Cesar
    et al.
    Cranfield University, UK.
    Mohseni, Martina
    Cranfield University, UK.
    Kyprianidis, Konstantinos G.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik. Cranfield University, UK.
    Sethi, Vishal
    Cranfield University, UK.
    Ogaji, Stephen O. T.
    Cranfield University, UK.
    Haslam, Antony
    Cranfield University, UK.
    Pilidis, Pericles
    Cranfield University, UK.
    Multidisciplinary Design Optimization of Aero Engines: Environmental Performance-Based Methodology2008Ingår i: SYMKOM’08 Proceedings. CIEPLNE MASZYNY PRZEPLYWOWE. TURBOMACHINERY. No.133, 2008Konferensbidrag (Refereegranskat)
    Abstract [en]

    A methodology and tool that allows evaluating and quantifying aero engines design trade-offs originated as a consequence of addressing conflicting objectives such as low environmental impact and low operating costs is presented, and applied to a general case study to assess the feasibility of using new highly efficient engine configurations: intercooled- recuperated (ICR) engines. The case study results show that according to the ICR systems performance (heat exchangers effectiveness, pressure losses, and weight penalty) they could find usage in practical applications.

  • 79.
    Chaudhary, R.
    et al.
    Indian Inst Technol, Ctr Environm Sci & Engn, Maharashtra, India.
    Tong, Y. W.
    Natl Univ Singapore, Dept Chem & Biomol Engn, Singapore..
    Dikshit, Anil Kumar
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. IndianInst Technol, Ctr Environm Sci & Engn, Maharashtra, India; Asian Inst Technol, Sch Environm Resources & Dev, Pathumthani,Thailand.
    CO2-assisted removal of nutrients from municipal wastewater by microalgae Chlorella vulgaris and Scenedesmus obliquus2018Ingår i: International Journal of Environmental Science and Technology, ISSN 1735-1472, E-ISSN 1735-2630, Vol. 15, nr 10, s. 2183-2192Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Axenic culture of microalgae Chlorella vulgaris ATCC((R)) 13482 and Scenedesmus obliquus FACHB 417 was used for phycoremediation of primary municipal wastewater. The main aim of this study was to measure the effects of normal air and CO2-augmented air on the removal efficacy of nutrients (ammonia N and phosphate P) from municipal wastewater by the two microalgae. Batch experiments were carried out in cylindrical glass bottles of 1L working volume at 25 degrees C and cool fluorescent light of 6500lux maintaining 14/10h of light/dark cycle with normal air supplied at 0.2Lmin(-1) per liter of the liquid for both algal strains for the experimental period. In the next set of experiments, the treatment process was enhanced by using 1, 2 and 5% CO2/air (vol./vol.) supply into microalgal cultures. The enrichment of inlet air with CO2 was found to be beneficial. The maximum removal of 76.3 and 76% COD, 94.2 and 92.6% ammonia, and 94.8 and 93.1% phosphate after a period of 10days was reported for C. vulgaris and S. obliquus, respectively, with 5% CO2/air supply. Comparing the two microalgae, maximum removal rates of ammonia and phosphate by C. vulgaris were 4.12 and 1.75mgL(-1)day(-1), respectively, at 5% CO2/air supply. From kinetic study data, it was found that the specific rates of phosphate utilization (q(phsophate)) by C. vulgaris and S. obliquus at 5% CO2/air supply were 1.98 and 2.11day(-1), respectively. Scale-up estimation of a reactor removing phosphate (the criteria pollutant) from 50 MLD wastewater influent was also done.

  • 80.
    Chen, B.
    et al.
    Beijing Normal University, China.
    Xiong, R.
    Beijing Institute of Technology, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Sun, Q.
    Shandong University, Jinan, China.
    Yang, J.
    China University of Geosciences, Beijing, China.
    Pathways for sustainable energy transition2019Ingår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 228, s. 1564-1571Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Energy transitions are ongoing processes all over the world. While sustainable solutions are envisioned for the future, many societies are still under high-carbon and high-pollution energy regime borne by fossil fuels. How to design pathways towards sustainable energy transition has attracted worldwide concerns. Understanding the possible transition pathways of the energy system requires the integration of new energy technologies, environmental sciences, economics and management. This Special Issue of Journal of Cleaner Production targets to collect the latest research results on sustainable energy systems, discover innovative avenues and inspiring models and share knowledge on energy system modelling and management. In this paper, we identify 4 themes on sustainable energy transition pathways including: (1)Sustainable energy economics and management; (2)Renewable energy generation and consumption; (3)Environmental impacts of energy systems; and (4)Electric vehicle and energy storage. Theories, technologies, innovative models, and successful experiences are discussed accordingly. It is suggested that creative, robust and audacious strategies in governance, management and education are needed to boost sustainable energy transition across various scales and sectors.

  • 81.
    Chen, Chang
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Tianjin University of Commerce, Key Laboratory China of Refrigeration Technology of Tianjin, Tianjin, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Tianjin University of Commerce, Key Laboratory China of Refrigeration Technology of Tianjin, 300134, China.
    Li, X.
    Tianjin University of Commerce, Key Laboratory China of Refrigeration Technology of Tianjin, China.
    Wang, Y.
    Tianjin University of Commerce, Key Laboratory China of Refrigeration Technology of Tianjin, China.
    Zhu, K.
    Tianjin University of Commerce, Key Laboratory China of Refrigeration Technology of Tianjin, China.
    Feasibility of using thermal inertia to shift the peak energy demand of buildings2018Ingår i: International Heat Transfer Conference, Begell House Inc. , 2018, s. 4419-4424Konferensbidrag (Refereegranskat)
    Abstract [en]

    Peak load introduces stress to the grid as supplied electricity is inadequate during peak demand period. In order to relieve the stress of grid and ensure the electricity supply, peak load shifting is an effective option. Buildings are consuming a huge amount of energy for space heating, ventilation and cooling. Using building thermal inertia to shift peak load has attracted more and more attention. By using thermal inertia, heat supplied during off-peak periods can be stored in the construction materials, and used in peak demand hours. However, peak shaving shall not sacrifice the indoor thermal comfort. The objective of this work is to investigate the impact of demand shifting by using thermal inertia on the indoor temperature. In order to understand how the demand shifting impacts the thermal comfort. A CFD model is developed to simulate an office room in winter time. Three cases that represent different shifting strategies are studied. According the results, when increasing the heating temperature, using thermal inertia of buildings can shift peak load, guarantee indoor thermal comfort and save energy. © 2018 International Heat Transfer Conference. All rights reserved.

  • 82.
    Chen, S.
    et al.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Li, M.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Zhang, Q.
    Academy of Chinese Energy Strategy, China University of Petroleum-Beijing, Changping, Beijing, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Study on the Oil Import/Export Quota Allocation Mechanism in China by Using a Dynamic Game-Theoretic Model2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 105, s. 3856-3861Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    With the rapid progress of oil market reform in China, independent refineries (small companies) get more and more oil import/export quotas, which will bring big impacts on the whole market and society. However, whether the impacts are positive or negative is highly dependent on the quota allocation mechanism and prices in global/domestic market markets. Therefore, in the present study, considering the game relationships among the six agents including state-owned companies, independent refineries, domestic and foreign oil product consumers, and domestic and foreign crude oil producers, in order to calculate the detailed impacts, a game-theoretic analysis model was developed. The impacts of different quota mechanism are analyzed and compared, and the optimal quota mechanism in different price scenarios is obtained based on the developed model. 

  • 83.
    Chen, S.
    et al.
    State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, China.
    Liu, J.
    State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, China.
    Wang, H.
    State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, China.
    Yan, J.
    School of Chemical Science, Royal Institute of Technology, Stockholm, Sweden.
    Campana, Pietro Elia
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zhang, J.
    State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing, China.
    Interaction relationship between urban domestic energy consumption and water use - A case study of Beijing and Shanghai2016Ingår i: Water Policy, ISSN 1366-7017, E-ISSN 1996-9759, Vol. 18, nr 3, s. 670-684Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Energy consumption and water use are inextricably linked. Combining research on energy consumption and water use in an urban context provides a scientific basis for the integrated planning of energy and water supply systems. Domestic energy and water are among the most consumed resources in urban environments. Furthermore, domestic resources represent an increasing proportion of the total resources consumed. This paper explores four key indicators of urban energy consumption (UEC) and water use in Beijing and Shanghai for the period of 2000 to 2011. Using correlation analysis, this study establishes the intrinsic relationship between UEC and water use. It also offers an analysis of the consumption trends of these two resources as well as their interactive relationship. The results show that urban domestic energy consumption (UDEC) and water use have a significant linear correlation: UDEC is positively correlated with water use, and the correlation coefficients of Beijing and Shanghai are 0.81 and 0.97, respectively. In Beijing, urban domestic energy and water use per capita are negatively correlated, with the high correlation coefficient of 0.93. In Shanghai, urban domestic energy and water use per capita are positively correlated, with the correlation coefficient of 0.90.

  • 84.
    Chen, S.
    et al.
    China University of Petroleum-Beijing, China.
    Zhang, Q.
    China University of Petroleum-Beijing, China.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Tianjin University of Commerce, China.
    Mclellan, B.
    Kyoto University, Japan.
    Zhang, T.
    China University of Petroleum-Beijing, China.
    Tan, Z.
    Investment decision on shallow geothermal heating & cooling based on compound options model: A case study of China2019Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 254, artikel-id 113655Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Developing shallow geothermal energy is expected to play an important role to supply affordable, clean and reliable heating by many countries in the world. However, the development is mainly hindered by the high upfront investment costs and various risks involved in the exploration, construction and operation phases. The present study proposed a compound options model to explore the optimal investment timing and value based on the consideration of both investment and operational flexibilities. The Least Square Monte Carlo and Markov Chain Monte Carlo methods were employed in the model to find the solutions. A case study was carried out for China, and five scenarios were simulated to understand the effects of different policies including subsidy, carbon trading mechanism, preferential taxation and preferential electricity price. The obtained results show that, (i) the incentive policies are essential for the development of shallow geothermal energy, which can attract more investment before 2030; (ii) the government is suggested to carry out a preferential electricity price for shallow geothermal development, rather than increase the subsidy; (iii) the application of compound options method increases the investment value in all five scenarios, but its impact on investment timing varies.

  • 85.
    Chen, Yao
    et al.
    Ludong Univ, Coll Traff & Transportat, Peoples R China..
    Albin,
    Mälardalens högskola.
    Jiuchun, Gu
    Ludong Univ, Coll Traff & Transportat, Yantai 264000, Peoples R China..
    Chao, Gao
    Shandong Jiaotong Univ, Dept Traff Engn, Peoples R China.
    RESEARCH ON SUPPLY AND DEMAND NON-EQUILIBRIUM DEPTH OF CITY AGGLOMERATION TRANSPORTATION SYSTEM2016Ingår i: JOURNAL OF THE BALKAN TRIBOLOGICAL ASSOCIATION, ISSN 1310-4772, Vol. 22, nr 3, s. 2795-2802Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The aim of this study is to construct a new model to measure the supply and demand non-equilibrium of transportation system, which is more accuracy and effect compared to the traditional model. Based on the non-equilibrium problem of supply greater or less than demand, which is common in current city agglomeration transportation system, the supply and demand non-equilibrium depth of city agglomeration transportation system is proposed. From the perspective of the connotation of supply and demand non-equilibrium depth of city agglomeration transportation system, the category is definitely divided, and then the corresponding functions of supply and demand of the city agglomeration transportation system are established. According to the interaction mechanism of the supply and demand of the city agglomeration transportation system, the non equilibrium depth in a narrow and general sense can be calculated respectively, also the total non-equilibrium depth is obtained, containing its three-dimensional structure and the fitting surface. In the case study, it is indicated that the research conclusion meets the actual requirements completely.

  • 86.
    Chiaramonti, D.
    et al.
    Univ Florence, Italy.
    Maniatis, K.
    Univ Florence, Italy.
    Tredici, M.R
    Univ Florence, Italy.
    Verdelho, V.
    EABA, Lisbon, Portugal.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH, Stockholm, Sweden.
    Life Cycle Assessment of Algae Biofuels: Needs and challenges2015Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 154, s. 1049-1051Artikel i tidskrift (Övrigt vetenskapligt)
  • 87.
    Christian, Brandstetter
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    UTREDNING AV NY METOD FÖR BESTÄMNING AV FUKTHALT I BIOBRÄNSLE: Fukthaltsmätning av biobränsle vid kraftvärmeverket i Sala2014Självständigt arbete på grundnivå (högskoleexamen), 180 hpStudentuppsats (Examensarbete)
    Abstract [en]

    This thesis was carried out in collaboration with Mälardalen University and Sala-Heby Energy AB. The purpose was to investigate if the relative humidity and temperature of the surrounding air in the fuel path through the fuel feeding system is affected by the moisture content of the fuel, and if it is possible to use this method for online measurement for control of the boiler.

    The method used in this investigation, is the logging of the relative humidity in the air. The measurement of the relative humidity occurs along the fuel path with five data loggers, termed Tiny tags from the company Intab AB. The measured relative humidity data along the fuel path is then compared against the measurement of the moisture content of the fuel according to the Swedish standard, weighing-drying-weighing method. The purpose is to find the variations of moisture content in the air, according to the hypothesis, to find out if there is a correlation to the fuel moisture content.

    The results demonstrate that it is difficult to find good locations along the path of the fuel system to the boiler, to not get saturated air 100 % relative humidity, with the equipment used in this analysis. The location of the measurements which gave the best correlation between the fuel moisture and relative humidity in the air was the location before the fuel crusher. The correlation here was around 46 % which is too low to utilize for the purpose of the moisture determination.

    The other measured spaces gave significantly lower correlation. This is assumed due to in the measuring spaces there were airborne wood particles. Those particles affect the sensor when they get stuck on the sensor and the surface moisture from the wood particles gives incorrect readings as result with the instrument used in this project.

  • 88.
    Chukwu, C.
    et al.
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Natere, G.
    Rosen, M.
    Dahlquist, Erik
    Thermal Optimization and Economic analysis of a Marncoh Heat Engine2008Konferensbidrag (Refereegranskat)
  • 89.
    Chukwuma Leonard, Leonard
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Wallin, Fredrik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Nehrenheim, Emma
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Karlsson, Björn
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Chowdhury, S.P.
    University of Cape Town.
    Chowdhury, Sunetra
    University of Cape Town.
    Using Renewable Energy Paradigm as a Tool for Sustainable Village Concept (SVC) in Africa2012Konferensbidrag (Refereegranskat)
  • 90.
    Cicek, Dennis
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Utvärdering av VVS-system i en befintlig byggnad: Energieffektiviseringsåtgärder för att minska energiförbrukningen i en enfamiljsvilla i Stockholm2018Självständigt arbete på grundnivå (yrkesexamen), 180 hpStudentuppsats (Examensarbete)
  • 91.
    Colmenares, Fernando
    et al.
    Cranfield University, Cranfield, Bedfordshire, England, UK.
    Kyprianidis, Konstantinos
    Cranfield University, Cranfield, Bedfordshire, England, UK.
    Gómez, Josué
    Cranfield University, Cranfield, Bedfordshire, England, UK.
    Ogaji, Stephen
    Cranfield University, Cranfield, Bedfordshire, England, UK.
    Pilidis, Pericles
    Cranfield University, Cranfield, Bedfordshire, England, UK.
    Latorre, Sergio
    Universidad de Antioquia, Medellín, Colombia.
    Future Aero-Engines’ Optimisation for Minimal Fuel Burn2008Ingår i: ASME Turbo Expo 2008: Power for Land, Sea, and AirVolume 2: Controls, Diagnostics and Instrumentation; Cycle Innovations; Electric PowerBerlin, Germany, June 9–13, 2008, 2008, s. 411-416Konferensbidrag (Refereegranskat)
    Abstract [en]

    While aircraft environmental performance has been important since the beginnings of commercial aviation, continuously increasing passenger traffic and a rise in public awareness have made aircraft noise and emissions two of the most pressing issues hampering commercial aviation growth today. The air transportation for the new millennium will require revolutionary solutions to meeting public demand for improving safety, reliability, environmental compatibility, and affordability. The objective of this research is to assess the trade-off between operating costs and environmental requirements of the future aero engines for short range commercial aircrafts. This involves optimising the engines’ design point to minimise the block fuel and evaluating the economic and environmental impact. A high by-pass ratio turbofan engine with performance characteristics and technology from the year 2000 was set up as a baseline and compared to very high by-pass ratio turbofans. The results present a great potential benefit of the geared turbofan compared to high BPR one (baseline) to reduce cruise CO2 emissions and noise; however this may involve NOx penalties, that is an increase of 5.1% in comparison to the baseline. The CRTF engine seems to be, at least according to the simulations, a very promising solution in terms of environmental and economical performance. This is one on the series of work that would be carried out on the cycles being assessed in this paper (feasibility study). Further work on the specific technical issues — such as: technological implications — would be published when completed.

  • 92.
    Cuneo, A.
    et al.
    Thermochemical Power Group, Università di Genova, Italy.
    Zaccaria, Valentina
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Tucker, D.
    U.S. DOE National Energy Technology Laboratory, Morgantown, United States.
    Sorce, A.
    Thermochemical Power Group, Università di Genova, Italy.
    Gas turbine size optimization in a hybrid system considering SOFC degradation2018Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 230, s. 855-864Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The coupling of a pressurized solid oxide fuel cell (SOFC) and a gas turbine has been proven to result in extremely high efficiency and reduced emissions. The presence of the gas turbine can improve system durability compared to a standalone SOFC, because the turbomachinery can supply additional power as the fuel cell degrades to meet the power request. Since performance degradation is an obstacles to SOFC systems commercialization, the optimization of the hybrid system to mitigate SOFC degradation effects is of great interest. In this work, an optimization approach was used to innovatively study the effect of gas turbine size on system durability for a 400 kW fuel cell stack. A larger turbine allowed a bigger reduction in SOFC power before replacing the stack, but increased the initial capital investment and decreased the initial turbine efficiency. Thus, the power ratio between SOFC and gas turbine significantly influenced system economic results.

  • 93.
    Cunha, Henrique E.
    et al.
    Chalmers University of Technology.
    Kyprianidis, Konstantinos G.
    Chalmers University of Technology.
    Investigation of the Potential of Gas Turbines for Vehicular Applications2012Ingår i: Proc. ASME. 44694; Volume 3: Cycle Innovations; Education; Electric Power; Fans and Blowers; Industrial and Cogeneration. GT2012-68402, 2012, s. 51-64Konferensbidrag (Refereegranskat)
    Abstract [en]

    Nowadays, the reduction of fuel consumption and pollutant emissions has become a top priority for society and economy. In the past decades, some of the environmental advantages of the gas turbine (such as inherently low CO and unburned HC) have led some car manufacturers to evaluate the potential of this type of engine as prime mover. This paper suggests a strategy to assess the fuel consumption of gas turbines applied in road vehicles. Based on a quasistatic approach, a model was created that can simulate road vehicles powered by gas turbines, and thereafter a comparison was established with reciprocating engines. Within this study, material and turbomachinery technology developments that have taken place in micro gas turbines since the 1960’s have been considered. A 30% efficiency improvement target has been identified with respect to making the gas turbine fuel competitive to a diesel engine powering an SUV. It is the authors’ view that several technologies that could mature sufficiently within the next 10–15 years exist, such as uncooled ceramic turbines. Such technologies could help bridge the fuel efficiency gap in micro gas turbines and make them commercially competitive in the future for low-emissions vehicular applications. Furthermore, the system developed also allows the simulation of hybrid configurations using gas turbines as range extenders, a solution that some car manufacturers consider to be the most promising in the coming years.

  • 94.
    Da Silva, Edna
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Kyprianidis, Konstantinos
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Säterskog, M.
    Saab AB, Linköping, Sweden.
    Camacho, R. G. R.
    Federal University of Itajubá, Itajubá, MG, Brazil.
    Sarmiento, A. L. E.
    FederalCenter of Technology Education, Rio de Janeiro, RJ, Brazil.
    Preliminary design optimization of an organic Rankine cycle radial turbine rotor2017Ingår i: PROCEEDINGS OF THE ASME TURBO EXPO: TURBINE TECHNICAL CONFERENCE AND EXPOSITION, 2017, VOL 3, American Society of Mechanical Engineers (ASME) , 2017, Vol. 3, artikel-id V003T06A018Konferensbidrag (Refereegranskat)
    Abstract [en]

    The present study describes the application of a preliminary design approach for the optimization of an organic Rankine cycle radial turbine. Losses in the nozzle the rotor have initially been modelled using a mean-line design approach. The work focuses on a typical small-scale application of 50 kW, and two working fluids, R245fa (1,1,1,3,3,-pentafluoropropane) and R236fa (1,1,1,3,3,3-hexafluoropropane) are considered for validation purposes. Real gas formulations have been used based on the NIST REFPROP database. The validation is based on a design from the literature, and the results demonstrate close agreement the reference geometry and thermodynamic parameters. The total-to-total efficiencies of the reference turbine designs were 72% and 79%. Following the validation exercise, an optimization process was performed using a controlled random search algorithm with the turbine efficiency set as the figure of merit. The optimization focuses on the R245fa working fluid since it is more suitable for the operating conditions of the proposed cycle, enables an overpressure in the condenser and allows higher system efficiency levels. The R236fa working fluid was also used for comparison with the literature, and the reason is the positive slope of the saturation curve, somehow is possible to work with lower temperatures. Key preliminary design variables such as flow coefficient, loading coefficient, and length parameter have been considered. While several optimized preliminary designs are available in the literature with efficiency levels of up to 90%, the preliminary design choices made will only hold true for machines operating with ideal gases, i.e. typical exhaust gases from an airbreathing combustion engine. For machines operating with real gases, such as organic working fluids, the design choices need to be rethought and a preliminary design optimization process needs to be introduced. The efficiency achieved in the final radial turbine design operating with R245fa following the optimization process was 82.4%. A three-dimensional analysis of the flow through the blade section using computational fluid dynamics was carried out on the final optimized design to confirm the preliminary design and further analyze its characteristics.

  • 95.
    Dahl, Christian
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Determination of fossil share in combustion of waste: Development of a novel method using NIR spectroscopy to predict the content of plastics in RDF-material2018Självständigt arbete på avancerad nivå (masterexamen), 20 poäng / 30 hpStudentuppsats (Examensarbete)
    Abstract [en]

    Incineration of waste materials has become a common way to handle a worldwide increase of produced waste materials. The problem with waste as fuel is that the material is not homogeneous and include a mixture of fossils and renewables. The fossil part ends up in an emission of fossil carbon dioxide in a combustion process, which is included in the emissions trading system. However, since waste material varies a lot in composition depending on the time of the year, origins, etc. it is preferable to have a method for real-time measurement of the fossil share of combusted waste. No real-time measurement technologies are available today which is the reason to investigate if near-infrared (NIR) spectroscopy could be a potential solution.

    An artificial mixture of refused derived fuel has been used to investigate the possibilities of NIR for prediction of the fossil share in waste material. The fossil share is assumed to be equal to the content of plastic material with an origin of oil products. Mixtures with different plastic content are scanned by the NIR instrument to obtain individual absorption spectra. A Partial least square (PLS) regression model is created on measured spectra and known content of plastics. The best model for the prediction on new spectral data using one of four measured replicates is a PLS model preprocessed with Savitzky-Golay smoothing that gives an R-square value of 0,782. If the prediction is done, depending on a delimitated wavenumber interval and an average of all four replicates is the best model instead of a PLS model pre-processed with standard normal variate without seven outliers that have an R-square value of 0,81. R-square value is the coefficient of determination which has been used to figure out the best model. An R-square value above 0,65 are recommended for process modelling, where 1 is the highest possible value.

  • 96.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Environment friendly contribution of the microbes to energy conversion2016Ingår i: Microbiological Industrial Hygiene, Nova Science Publishers, Inc. , 2016, s. 349-359Kapitel i bok, del av antologi (Övrigt vetenskapligt)
    Abstract [en]

    There is enough biomass annual growth to replace all fossil fuels used principally. Still, only a small portion of this is actually used efficiently. In this chapter we discuss the resources and how they can be utilized in different ways. Especially use in bio-refineries is discussed, where both full scale plants and future directions is addressed. Concerning future directions for bio-refineries an EU project ABOWE demonstrated how organic waste can be used for production of chemicals like 2,3-butanediol, valeric acid, hydrogen and other organic acids. After this crops for food is discussed and how waste from agriculture can be utilized as source for production of the chemicals and crops with different metabolic paths are discussed briefly, C3, C4 and CAM crops. C3 crops are the most common while C4 and CAM have more efficient systems for CO2 fixation and also have much higher efficiency from sun to chemicals. Also other applications are presented like extraction of metals using microorganisms and production of meat replacement using fungi. Finally obstacles for the efficient utilization of biomass are discussed. 

  • 97.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    How to develop a sustainable fossil fuel free Stockholm-Malardalen region2010Ingår i: World Renewable Energy Congress XI 25-30 September 2010, Abu Dhabi, UAE / [ed] Ali Sayigh, Abu Dhabi: WREC/WREN , 2010Konferensbidrag (Refereegranskat)
    Abstract [en]

    First the energy balance of today is determined in a way that is possible to follow up from year to year. The second phase is to determine what available renewable energy resources we have and how these can be utilised. Hydro power already gives 5 TWh/y in the region, but new resources and enhancements of the existing as different wastes and crops are reviewed. The possibility to use solar power and TPV (Thermo Photo Voltaic) is discussed. Next step is to make a scenario for how to reach a consumption that is less than the available resources, and here different consumption patterns as well as ways to change these are considered. Energy efficient buildings and smart homes can give major impact on one of the major needs as heating is of major importance winter time, and cooling summer time. The pros and cons for different solutions are discussed.

     

  • 98.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    MODELLING AND CONTROL OF A DRY BLACK LIQUOR GASIFICATION PROCESS2006Konferensbidrag (Refereegranskat)
  • 99.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Modelling and design of a dry black liquor gasification process2006Ingår i: Proceedings of IFAC, ALSIS06, Helsinki, 2006, s. 64-69Konferensbidrag (Refereegranskat)
    Abstract [en]

    The purpose of this paper is to present modelling and design of a new type of black liquor gasification process with significant benefits compared to existing Tomlinson boilers and wet gasification processes. The organics are gasified by mainly steam reforming, as the temperature is relatively low (below 850 °C) and the water content of the black liquor relatively high (> 20 % water). The gasification can be with or without direct caustization. Sulphates are reduced to first Na2S, and then most of the sulphur is evaporated as H2S (Hydrogen sulphide), after reaction with CO2 + H 2O.The hydrogen sulphide is absorbed in a and used for preimpregnation of the wood chips, to give modified cooking with stronger and brighter fibres out from the digester. With TiO2 added, sodium carbonate is converted into Na2O.TiO2, which dissolved in water gives 4 NaOH + Na2O.(TiO2)3. The direct caustization makes the lime kiln unnecessary. The gas may be combusted in a gas turbine /steam turbine cycle, to produce 2-3 times more electricity than conventional recovery boilers, that is an electrical efficiency of 30-35.

  • 100.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    PROCEEDINGS FROM SCIENTIFIC CONFERENCE ON GREEN ENERGY AND IT2008Proceedings (redaktörskap) (Övrigt vetenskapligt)
    Abstract [en]

    Scientific session on Energy saving and Green energy

    Chairman: Erik Dahlquist, Mälardalen University

    1. Investigations on CO2 absorption using amine solvents in hollow fiber membrane contactors by experiments .

    Yuexia Lv1, Xinhai Yu1*, Shan-tung Tu1, J. Yan2, E. Dahlquist2,School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China; 2. Dept. IST, Mälardalen University, Västerås, Sweden

    2. Intensification of transesterification for synthesis of biodiesel using microchannel reactors.

    Zhenzhong Wen1, Xinhai Yu1*, Shan-tung Tu1, J. Yan2, E. Dahlquist2 1. School of Mechanical and Power Engineering, East China University of Science and Technology, Shanghai, 200237, China; 2. Dept. IST, Mälardalen University, Västerås

    3. Continuous bioethanol production by fermentation

    . Bernt Lie, Juan I. Videla.Telemark University College, Porsgrunn, Norway

    4. Optimization and Economic Analysis of Marnoch Thermal Energy Conversion System,

    C.C. Chukwu1, G.F Naterer2, M.A. Rosen3, E. Dahlquist4 I.A Marnoch5 ,1,2,3,4 University of Ontario Institute of Technology, Oshawa. Ontario, Canada, 4 Malardalen University, Vasteras Sweden, 5 Marnoch Thermal Power Inc. Toronto, Ontario, Canada,

    5. Analysis of the coal based polygeneration system of hybrid type

    Guoqiang Zhang1,2, Lin GAO1, Hongguang JIN1,* 1 Institute of Engineering Thermophysics, Chinese Academy of Sciences

    6. Power transformer parameters identification using extended kalman filter

    Kourosh Mousavi Takami, TDI researcher and phd student in Malardalen University , Jafar Mahmoudi , Erik Dahlquist, Malardalen University

    7. An advanced energy saving method for Aluminium - iron - copper bonding using explosive welding

    Scientific session on Energy savings in houses

    Chairman: Jurek Pyrko, Lund University

    . Mohammad Tabatabaee. TDI institute, Teheran, Iran and Mälardalen University

    8. Design of hot water user profiles for Swedish households based on time diaries.

    751 21 Uppsala, Sweden

    Magdalena Lundh, Ewa Wäckelgård, Kajsa Ellegård. Department of Engineering Sciences The Ångström Laboratory Box 534

    9. Modeling Household Electricity Load from Time-Use Data

    . Joakim Widén, Kajsa Ellegård och Ewa Wäckelgård. Department of Engineering Sciences,Solid State Physics,Uppsala University

    10. Investigation of electricity consumption in single houses with electrical heating alone and together with complementary heating systems

    . Cajsa Bartusch, Fredrik Wallin, Erik Dahlquist, Mälardalen University.

    11. Differences in electricity and hot water consumption in apartments of different sizes.

    Iana Vassileva, Cajsa Bartusch, Erik Dahlquist. Mälardalen University.

    12. Novel Architect Designs Energy-Saving Iranian Homes

    . S.M. Esmail Mousavi-Takami, TDI Technical Development Institute, Teheran, Iran

    13. Inform me please! - Energy use information to households and Demand Response

    . Jurek Pyrko, Energy Sciencees, Lunds University

    14. "Consumers, energy and IT. IT and other tools to support efficient energy consumption"

    I.C. MariAnne Karlsson Chalmers University of Technology, Product and Production Development

    15. Influence of Residential Ventilation on Radon Mitigation with Energy Saving emphasis

    Keramatollah Akbari, Mälardalen University and TDI in Teheran, Iran

    16

    . Extracting alumina from bauxite ore in jajarm factory process simulation using aspen software

    Mohammad Farrokh and Jafar Mahmoudi, Mälardalen University and TDI in Teheran, Iran

    17. Description of techniques for hot spot monitoring and detection in power transformers

    Hassan gholinejad, Kourosh Mousavi Takami and Jafar Mahmoudi, Mälardalen University and Tanesh Company, Iran

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