mdh.sePublikationer
Ändra sökning
Länk till posten
Permanent länk

Direktlänk
BETA
Publikationer (10 of 40) Visa alla publikationer
Xi, X., Li, H., Wallin, F., Avelin, A., Yang, X. & Yu, Z. (2019). Air pollution related externality of district heating - A case study of Changping, Beijing. In: Energy Procedia: . Paper presented at 10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China (pp. 4323-4330). Elsevier Ltd
Öppna denna publikation i ny flik eller fönster >>Air pollution related externality of district heating - A case study of Changping, Beijing
Visa övriga...
2019 (Engelska)Ingår i: Energy Procedia, Elsevier Ltd , 2019, s. 4323-4330Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Air pollution, caused by the use of fossil fuel, has been an environmental plague in China. It has a strong negative impact on human health. Since the costs of damage to health are not born by the pollution producers, these costs translate to social externality. Policies have an important role in optimizing resource allocation, such as penalizing the pollutant producers and incentivizing clean energy development. Among others, replacing coal with natural gas for heating represents an important example of air quality improvement measures. This paper presents a study that evaluates the health impacts from air pollution and the external cost of the "Coal-To-Gas" policy in district heating using Changping District (Beijing, China) as an example. Four scenarios were considered based on the historical and standard PM2.5 concentration. Results show that PM2.5 is responsible for causing an increase of 40% premature deaths in 2015 and that the monetary value of damage to health is higher than 1.2 billion CNY. In 2016 and 2017, the reported air quality was better than that in 2015. As a result, 13.3% and 26% premature deaths caused by air pollution were avoided in 2016 and 2017 compared to 2015 respectively. If the PM2.5 concentration level were to be reduced to national standard, the number of premature deaths attributed to PM2.5 could further decrease to 47.7% compared to 2015. Overall, the Coal-To-Gas policy in district heating reduces 0.017%~0.45% of premature death caused by air pollution each year. Air pollution reduction policies, which are expected to improve air quality together in the future, and the specific policy of Coal-To-Gas in district heating, could make great contribution to reducing the premature death caused by environmental problem and need more attention from the government and the public.

Ort, förlag, år, upplaga, sidor
Elsevier Ltd, 2019
Nyckelord
Coal-To-Gas, District heating, Externality, Health effect, PM2.5
Nationell ämneskategori
Medicinteknik
Identifikatorer
urn:nbn:se:mdh:diva-43140 (URN)10.1016/j.egypro.2019.01.789 (DOI)000471031704105 ()2-s2.0-85063905381 (Scopus ID)
Konferens
10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China
Tillgänglig från: 2019-04-18 Skapad: 2019-04-18 Senast uppdaterad: 2019-07-11Bibliografiskt granskad
Rahman, M., Avelin, A. & Kyprianidis, K. (2019). An Approach for Feedforward Model Predictive Control of Continuous Pulp Digesters. Processes, 7(9), 602-622
Öppna denna publikation i ny flik eller fönster >>An Approach for Feedforward Model Predictive Control of Continuous Pulp Digesters
2019 (Engelska)Ingår i: Processes, ISSN 2227 9717, Vol. 7, nr 9, s. 602-622Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Kappa number variability at the continuous digester outlet is a major concern for pulp and paper mills. It is evident that the aforementioned variability is strongly linked to the feedstock wood properties, particularly lignin content. Online measurement of lignin content utilizing near-infrared spectroscopy at the inlet of the digester is paving the way for tighter control of the blow-line Kappa number. In this paper, an innovative approach of feedforwarding the lignin content to a model predictive controller was investigated with the help of modeling and simulation studies. For this purpose, a physics-based modeling library for continuous pulp digesters was developed and validated. Finally, model predictive control approaches with and without feedforwarding the lignin measurement were evaluated against current industrial control and proportional-integral-derivative (PID) schemes. 

Nyckelord
pulp and paper; Kappa number; pulp digester; modeling; feedforward; predictive control
Nationell ämneskategori
Energiteknik
Forskningsämne
energi- och miljöteknik
Identifikatorer
urn:nbn:se:mdh:diva-45217 (URN)10.3390/pr7090602 (DOI)2-s2.0-85072222936 (Scopus ID)
Projekt
FUDIPO
Tillgänglig från: 2019-09-16 Skapad: 2019-09-16 Senast uppdaterad: 2019-09-26Bibliografiskt granskad
Daraei, M., Avelin, A., Dotzauer, E. & Thorin, E. (2019). Evaluation of biofuel production integrated with existing CHP plants and the impacts on production planning of the system – A case study. Applied Energy, 252, Article ID 113461.
Öppna denna publikation i ny flik eller fönster >>Evaluation of biofuel production integrated with existing CHP plants and the impacts on production planning of the system – A case study
2019 (Engelska)Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 252, artikel-id 113461Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

The increasing atmospheric CO2 concentration has caused a transformative shift in global energy systems, which is contributing to an increased use of renewables. Sweden is among the countries trying to shift to a fossil-fuel-free system in all energy sectors. This paper addresses the fuel demand and supply in the transportation sector in the county of Västmanland in Sweden. A Mixed Integer Linear Programming optimization model is developed to minimize cost in the studied system. The model is further used to investigate the influence of three different scenarios on production planning of regional Combined Heat and Power (CHP) plants: (1) straw-based biofuel production integrated with existing CHP plants to fuel combustion engine vehicles, (2) use of electric vehicles, and (3) use of hybrid vehicles fueled by both electricity and bioethanol. Potential solar power generation from rooftop solar cells is also included in the model. The energy system in scenario 2 is found to have the highest overall system efficiency; however, a large amount of power needs to be imported to the system. Hybrid vehicles can potentially reduce the electricity import and CO2 emissions compared to the current situation. Electricity production from rooftop solar collectors could provide the energy needs of the vehicles during summer, while regionally produced straw-based bioethanol integrated with CHP plants can satisfy the fuel needs of the vehicles in winter. This approach could affect the production planning of CHP plants, result in less fuel use and increase the share of renewable resources in the regional transportation system. 

Nyckelord
Electric vehicles, Energy systems, Mixed Integer Linear Programming, Optimization, Straw-based bioethanol, Transportation sector
Nationell ämneskategori
Energiteknik
Identifikatorer
urn:nbn:se:mdh:diva-44658 (URN)10.1016/j.apenergy.2019.113461 (DOI)2-s2.0-85067284871 (Scopus ID)
Tillgänglig från: 2019-06-27 Skapad: 2019-06-27 Senast uppdaterad: 2019-10-23Bibliografiskt granskad
Bian, C., Li, H., Wallin, F., Avelin, A., Lin, L. & Yu, Z. (2019). Finding the optimal location for public charging stations - A GIS-based MILP approach. In: Energy Procedia: . Paper presented at 10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018 (pp. 6582-6588). Elsevier Ltd, 158
Öppna denna publikation i ny flik eller fönster >>Finding the optimal location for public charging stations - A GIS-based MILP approach
Visa övriga...
2019 (Engelska)Ingår i: Energy Procedia, Elsevier Ltd , 2019, Vol. 158, s. 6582-6588Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Electric Vehicles (EVs) have achieved a significant development because of the continuous technology revolution and policy supports in recent years, which leads to a larger demand of charging stations. Strategies about how to find the optimal location for charging facilities are urgently needed in order to further assist the development of EVs. This paper focus on the return of investments on EV charging stations and proposes a Mixed Integer Linear Programming (MILP) model based on Geographic Information System (GIS) to identify the optimal location of charging stations in cities. Traffic flow data and land-use classifications are used as important inputs, and six important constraints are included in the MILP model with the objective function of maximizing the total profits of new charging stations. The effectiveness of the proposed method is then demonstrated by implementing a case study in Västerås, Sweden.

Ort, förlag, år, upplaga, sidor
Elsevier Ltd, 2019
Nyckelord
EV, GIS, MILP, Optimal location, Public charging startions, Charging (batteries), Economics, Integer programming, Investments, Land use, Location, Electric Vehicles (EVs), Landuse classifications, Mixed integer linear programming model, Optimal locations, Return of investments, Technology revolution, Geographic information systems
Nationell ämneskategori
Energiteknik
Identifikatorer
urn:nbn:se:mdh:diva-43192 (URN)10.1016/j.egypro.2019.01.071 (DOI)000471031706145 ()2-s2.0-85063879695 (Scopus ID)
Konferens
10th International Conference on Applied Energy, ICAE 2018, 22 August 2018 through 25 August 2018
Tillgänglig från: 2019-04-25 Skapad: 2019-04-25 Senast uppdaterad: 2019-07-11Bibliografiskt granskad
Salman, C. A., Dahlquist, E., Thorin, E., Kyprianidis, K. & Avelin, A. (2019). Future directions for CHP plants using biomass and waste - Adding production of vehicle fuels. In: E3S Web of Conferences: . Paper presented at 2019 SUstainable PolyEnergy Generation and HaRvesting, SUPEHR 2019, 4 September 2019 through 6 September 2019. EDP Sciences, Article ID 01006.
Öppna denna publikation i ny flik eller fönster >>Future directions for CHP plants using biomass and waste - Adding production of vehicle fuels
Visa övriga...
2019 (Engelska)Ingår i: E3S Web of Conferences, EDP Sciences , 2019, artikel-id 01006Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

In Northern Europe, the production of many biobased CHP plants is getting affected due to the enormous expansion of wind and solar power. In addition, heat demand varies throughout the year, and existing CHP plants show less technical performance and suffer economically. By integrating the existing CHP plants with other processes for the production of chemicals, they can be operated more hours, provide operational and production flexibility and thus increase efficiency and profitability. In this paper, we look at a possible solution by converting an existing CHP plant into integrated biorefinery by retrofitting pyrolysis and gasification process. Pyrolysis is retrofitted in an existed CHP plant. Bio-oil obtained from pyrolysis is upgraded to vehicle grade biofuels. Gasification process located upfront of CHP plant provides the hydrogen required for upgradation of biofuel. The results show that a pyrolysis plant with 18 ton/h feed handling capacity (90 MWth), when integrated with gasification for hydrogen requirement and CHP plant for heat can produce 5.2 ton/h of gasoline/diesel grade biofuels. The system integration gives positive economic benefits too but the annual operating hours can impact economic performance. 

Ort, förlag, år, upplaga, sidor
EDP Sciences, 2019
Nationell ämneskategori
Energisystem
Identifikatorer
urn:nbn:se:mdh:diva-45259 (URN)10.1051/e3sconf/201911301006 (DOI)2-s2.0-85071879296 (Scopus ID)
Konferens
2019 SUstainable PolyEnergy Generation and HaRvesting, SUPEHR 2019, 4 September 2019 through 6 September 2019
Tillgänglig från: 2019-09-19 Skapad: 2019-09-19 Senast uppdaterad: 2019-09-19Bibliografiskt granskad
Daraei, M., Avelin, A. & Thorin, E. (2019). Optimization of a regional energy system including CHP plants and local PV system and hydropower: Scenarios for the County of Västmanland in Sweden. Journal of Cleaner Production, 230, 1111-1127
Öppna denna publikation i ny flik eller fönster >>Optimization of a regional energy system including CHP plants and local PV system and hydropower: Scenarios for the County of Västmanland in Sweden
2019 (Engelska)Ingår i: Journal of Cleaner Production, ISSN 0959-6526, E-ISSN 1879-1786, Vol. 230, s. 1111-1127Artikel i tidskrift (Refereegranskat) Published
Abstract [en]

Providing the energy needs of the cumulatively increasing population has become a challenge for the regional energy systems in the world. The most critical challenge is to supply enough energy in the forms of heat and power during the cold and warm periods of the year with the lowest production cost and minimum environmental impacts. A solution is to increase the green energy supply from renewable energy resources such as solar, wind power, and hydropower. In order to apply this solution in the real energy system, potentials for clean energy supply in an optimized manner should be evaluated. In this study, an optimization model is developed for a regional energy system in the central part of Sweden. The studied system consists of Combined Heat and Power (CHP)plants and heat water boilers together with renewable energy supply from rooftop Photo Voltaic (PV)- solar collectors and regional hydropower plants. The General Algebraic Modeling System (GAMS)is used to create the model based on the Mixed Integer Linear Programming (MILP)method. The goal is to evaluate the influence of local renewable energy systems on the production planning of CHP plants in a region. Two different scenarios are investigated based on the extremes in energy supply and demand concerning the increased use of Electrical Vehicles (EVs)and more application of Heat Pumps (HPs)in the system. The results show that installation of rooftop PV systems has the potential to reduce the electricity import to the region; however, it will at the same time reduce the operation time of the CHP plans during the summer period. With increased use of HPs for heating, the shut off time for CHP plants is further increased. Increase in electric passenger cars penetration in the system has no impacts on the production profiles of the plants. The regional electricity demand grows significantly by more utilization of EVs and increased application of heat pumps in the studied system. The high electricity demand will mainly be satisfied by importing electricity from outside the region together with low production from CHP plants and the power generated by the rooftop PV systems and regional hydropower. The developed optimization model with studied scenarios can be applied to other energy systems to increase the knowledge of production planning and feasibility of a fossil fuel free energy system.

Ort, förlag, år, upplaga, sidor
Elsevier Ltd, 2019
Nyckelord
Electrical vehicle, Heat pump, Optimization, Production planning, Renewable energy resource, Algebra, Cogeneration plants, Economics, Electric power utilization, Energy policy, Environmental impact, Fossil fuels, Free energy, Heat pump systems, Hydroelectric power, Hydroelectric power plants, Integer programming, Planning, Power generation, Production control, Pumps, Renewable energy resources, Wind power, Clean energy supplies, Combined heat and power, Electrical vehicles, Heat pumps, Mixed-integer linear programming, Optimization modeling, Regional energy systems, Electric power system interconnection
Nationell ämneskategori
Energiteknik
Identifikatorer
urn:nbn:se:mdh:diva-43876 (URN)10.1016/j.jclepro.2019.05.086 (DOI)000474676300098 ()2-s2.0-85065879762 (Scopus ID)
Tillgänglig från: 2019-06-11 Skapad: 2019-06-11 Senast uppdaterad: 2019-10-23Bibliografiskt granskad
Daraei, M., Thorin, E., Avelin, A. & Dotzauer, E. (2019). Potential biofuel production in a fossil fuel free transportation system: A scenario for the County of Västmanland in Sweden. In: Energy Procedia: . Paper presented at 10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China (pp. 1330-1336). Elsevier Ltd, 158
Öppna denna publikation i ny flik eller fönster >>Potential biofuel production in a fossil fuel free transportation system: A scenario for the County of Västmanland in Sweden
2019 (Engelska)Ingår i: Energy Procedia, Elsevier Ltd , 2019, Vol. 158, s. 1330-1336Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Air pollution and increased CO2 concentration in atmosphere and other energy related issues caused a transformative shift in energy system which contributes to increased utilization of renewables as alternative to generate green energy carriers. The potential of renewable resources in different region and potential energy conversion have been largely considered by many researcher in many countries. The energy conversion technologies to produce heat, electricity, and transportation fuels have made impressive technical advances. Sweden has also been challenging with mitigation of CO2 emission and trying to shift into a fossil fuel free system in all energy sectors. This paper deals with the current status of fuel demand and supply in the transport sector in a County in Sweden. A scenario for a fossil fuel free transport sector at a regional level is developed to investigate the potential biofuel production from regionally produced straw. The results and analysis indicate that the potential for cereal based bioethanol production in the region is sufficient to meet the biofuel demand of the County. Using the fallow land for cereal cultivation, it is feasible to shift into a fossil fuel free transportation system where all passenger cars are fueled by bioethanol. The results and finding from the current paper will be used to develop further study on optimization of local biofuel production integrated with CHP plants considering application of other feedstock such as municipal wastes.

Ort, förlag, år, upplaga, sidor
Elsevier Ltd, 2019
Nyckelord
Bioethanol, Energy system, Straw, Transport sector
Nationell ämneskategori
Annan teknik
Identifikatorer
urn:nbn:se:mdh:diva-43132 (URN)10.1016/j.egypro.2019.01.327 (DOI)000471031701107 ()2-s2.0-85063892971 (Scopus ID)
Konferens
10th International Conference on Applied Energy (ICAE2018), 22-25 August 2018, Hong Kong, China
Tillgänglig från: 2019-04-18 Skapad: 2019-04-18 Senast uppdaterad: 2019-07-11Bibliografiskt granskad
Daraei, M., Thorin, E., Avelin, A. & Dotzauer, E. (2019). Potentials for increased application of renewables in the transportation system: A case study for Södermanland County, Sweden. In: Energy Procedia: . Paper presented at Applied Energy Symposium and Forum, Renewable Energy Integration with Mini/Microgrids, REM 2018, 29–30 September 2018, Rhodes, Greece (pp. 267-273). Elsevier Ltd
Öppna denna publikation i ny flik eller fönster >>Potentials for increased application of renewables in the transportation system: A case study for Södermanland County, Sweden
2019 (Engelska)Ingår i: Energy Procedia, Elsevier Ltd , 2019, s. 267-273Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

In this study, possible alternations in a regional transport sector are assessed to increase the use of renewable resources. Three scenarios are developed aimed to investigate different alternatives including potential straw-based bioethanol supply to fuel regional cars with combustion engines, more use of Electrical Vehicles (EVs) with use of potential power from solar energy, and the feasibility of application of hybrid cars fueled with electricity and bioethanol. The evaluation considers the reduction in CO 2 emissions and increased balance in energy demand and supply. Results of the study indicate that application of hybrid vehicles with bioethanol-fueled engines and electrical motors could potentially reduce the CO 2 emissions compared with other proposed approaches in the studied scenarios. At the same time, there would be a balance in the system, so that, the bioethanol production from the available cereal straw in the region can meet the energy demand of suggested hybrid cars in wintertime. While, the energy supply from solar cells installed on the rooftop of the buildings can cover the electricity need of the motor during summer. This approach will also result in increased use of renewables in the transportation system.

Ort, förlag, år, upplaga, sidor
Elsevier Ltd, 2019
Nyckelord
EVs, Hybrid, Renewable resources, Solar cells, Straw-based bioethanol
Nationell ämneskategori
Annan teknik
Identifikatorer
urn:nbn:se:mdh:diva-43133 (URN)10.1016/j.egypro.2018.12.061 (DOI)000471291100043 ()2-s2.0-85063808717 (Scopus ID)
Konferens
Applied Energy Symposium and Forum, Renewable Energy Integration with Mini/Microgrids, REM 2018, 29–30 September 2018, Rhodes, Greece
Tillgänglig från: 2019-04-18 Skapad: 2019-04-18 Senast uppdaterad: 2019-07-11Bibliografiskt granskad
Dong, S., Li, H., Wallin, F., Avelin, A., Zhang, Q. & Yu, Z. (2019). Volatility of electricity price in Denmark and Sweden. In: Yan, J Yang, HX Li, H Chen, X (Ed.), INNOVATIVE SOLUTIONS FOR ENERGY TRANSITIONS: . Paper presented at 10th International Conference on Applied Energy (ICAE), AUG 22-25, 2018, Hong Kong, HONG KONG (pp. 4331-4337). ELSEVIER SCIENCE BV
Öppna denna publikation i ny flik eller fönster >>Volatility of electricity price in Denmark and Sweden
Visa övriga...
2019 (Engelska)Ingår i: INNOVATIVE SOLUTIONS FOR ENERGY TRANSITIONS / [ed] Yan, J Yang, HX Li, H Chen, X, ELSEVIER SCIENCE BV , 2019, s. 4331-4337Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Under the pressure of global environmental climate change, all countries in the world are developing renewable energy such as hydropower, wind energy, and solar energy As a result, the electricity price varies in different patterns depending on the penetration of renewable energy. In this paper, a non-parametric model is employed to analyze the historical data of electricity spot price from Danish price areas of the Nord Pool (with high percentage of wind power), Swedish price areas of the Nord Pool (with high percentage of hydropower) and PJM market (with little renewable energy penetrated). The objective is to deeply understand the influence of renewable energies on electricity price volatility. It is found that electricity prices are more stable in Swedish price areas as hydropower is a more stable energy source. The electricity price in PJM market is also comparatively stable, only more volatile than Swedish market, as fossil fuels are dominant energy resources. For Danish price areas, the volatility of electricity prices is clearly affected by wind power, which is a highly intermittent energy resource.

Ort, förlag, år, upplaga, sidor
ELSEVIER SCIENCE BV, 2019
Serie
Energy Procedia, ISSN 1876-6102 ; 158
Nyckelord
volatility of elecctricity price, electricity spot price, penetration of renewable energy, electricity market
Nationell ämneskategori
Energiteknik
Identifikatorer
urn:nbn:se:mdh:diva-44854 (URN)10.1016/j.egypro.2019.01.788 (DOI)000471031704106 ()
Konferens
10th International Conference on Applied Energy (ICAE), AUG 22-25, 2018, Hong Kong, HONG KONG
Tillgänglig från: 2019-07-11 Skapad: 2019-07-11 Senast uppdaterad: 2019-07-11Bibliografiskt granskad
Rahman, M., Avelin, A., Kyprianidis, K., Jansson, J. & Dahlquist, E. (2018). Model based Control and Diagnostics strategies for a Continuous Pulp Digester. In: Paper Conference and Trade Show, PaperCon 2018: . Paper presented at TAPPI Paper Conference and Trade Show, PaperCon 2018; Charlotte; United States; 15 April 2018 through 18 April 2018; Code 143482 (pp. 136-147). , 1
Öppna denna publikation i ny flik eller fönster >>Model based Control and Diagnostics strategies for a Continuous Pulp Digester
Visa övriga...
2018 (Engelska)Ingår i: Paper Conference and Trade Show, PaperCon 2018, 2018, Vol. 1, s. 136-147Konferensbidrag, Publicerat paper (Refereegranskat)
Abstract [en]

Kappa number, which essentially indicates the amount of lignin left in the pulp after cooking, is the most important physical quantity linked to the quality and economics of a Kraft-pulp mill. Controlling the Kappa number is a difficult task mainly due to the naturally varying feedstock, significant residence time, insufficient measurements and complex nature of the delignification process. Moreover, faults such as screen clogging, hang-ups and channeling in the process often occur and increase the operational costs considerably. In this work, the possibility of feedforwarding the lignin content of incoming wood chips, by a near-infrared spectroscopic measurement of one of the major process disturbances, to a model predictive controller, is investigated by means of modeling and simulation studies. Additionally, a simple Bayesian network based diagnostics approach is proposed to detect the continuous digester faults.

Nationell ämneskategori
Teknik och teknologier Energiteknik
Forskningsämne
energi- och miljöteknik
Identifikatorer
urn:nbn:se:mdh:diva-41297 (URN)2-s2.0-85060374344 (DOI)2-s2.0-85060374344 (Scopus ID)9781510871892 (ISBN)
Konferens
TAPPI Paper Conference and Trade Show, PaperCon 2018; Charlotte; United States; 15 April 2018 through 18 April 2018; Code 143482
Projekt
FUDIPO
Tillgänglig från: 2018-11-07 Skapad: 2018-11-07 Senast uppdaterad: 2019-10-01Bibliografiskt granskad
Organisationer
Identifikatorer
ORCID-id: ORCID iD iconorcid.org/0000-0001-8191-4901

Sök vidare i DiVA

Visa alla publikationer