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  • 151.
    Lu, Yuexia
    et al.
    School of Mechanical and Power Engineering, East China University of Science and.
    Yu, Xinhai
    School of Mechanical and Power Engineering, East China University of Science and.
    Tu, Shan-Tung
    School of Mechanical and Power Engineering, East China University of Science and.
    Yan, Jinyue
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    CO2 capture by the absorption process in membrane contactors2009Ingår i: The First International Conference on Applied Energy (ICAE09), 2009Konferensbidrag (Refereegranskat)
    Abstract [en]

    Membrane has a potential to improve the CO2 capture process. In this paper, experimentswere carried out to investigate the impact of amine absorbents on membrane surfaceproperties with polypropylene (PP) fibers immersed in monoethanolamine (MEA) andmethyldiethanolamine (MDEA) aqueous solutions with and without CO2 loading. The surfacemorphological changes of the membrane were examined by using scanning electronmicroscopy (SEM). The experimental results showed that the fibers immersed in the aqueoussolutions without CO2 loading underwent significant deformation than those with CO2 loading,which is mostly linked to the decrease of absorbent concentration with the reaction betweenCO2 and aqueous solutions. It was also found that the morphological changes of membraneimmersed in MDEA were severer than that in MEA due to the lower surface tension of theformer.

  • 152.
    Lu, Yuexia
    et al.
    School of Mechanical and Power Engineering, East China University of Science and.
    Yu, Xinhai
    School of Mechanical and Power Engineering, East China University of Science and.
    Tu, Shan-Tung
    School of Mechanical and Power Engineering, East China University of Science and.
    Yan, Jinyue
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    INFLUENCE OF MEA AND MDEA SOLUTIONS ON SURFACE MORPHOLOGY OF MICROPOROUS POLYPROPYLENE MEMBRANES2009Ingår i: The First International Conference on Applied Energy (ICAE09), 2009Konferensbidrag (Refereegranskat)
    Abstract [en]

    Membrane has a potential to improve the CO2 capture process. In this paper, experimentswere carried out to investigate the impact of amine absorbents on membrane surfaceproperties with polypropylene (PP) fibers immersed in monoethanolamine (MEA) andmethyldiethanolamine (MDEA) aqueous solutions with and without CO2 loading. The surfacemorphological changes of the membrane were examined by using scanning electronmicroscopy (SEM). The experimental results showed that the fibers immersed in the aqueoussolutions without CO2 loading underwent significant deformation than those with CO2 loading,which is mostly linked to the decrease of absorbent concentration with the reaction betweenCO2 and aqueous solutions. It was also found that the morphological changes of membraneimmersed in MDEA were severer than that in MEA due to the lower surface tension of theformer.

  • 153.
    Lv, Y.
    et al.
    School of Mechanical and Automotive Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.
    Bi, J.
    School of Mechanical and Automotive Engineering, Qilu University of Technology, Shandong Academy of Sciences, Jinan, China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. School of Chemical Science and Engineering, Royal Institute of Technology, Stockholm, Sweden.
    State-of-the-art in low carbon community2018Ingår i: International Journal of Energy for a Clean Environment, ISSN 2150-3621, E-ISSN 2150-363X, Vol. 19, nr 3-4, s. 175-200Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The global warming and energy crisis have att racted signifi cant att ention round the world in recent years. As a basic social unit involving building construction, inhabitant transportation, energy utilization, and individual behavior, the community may signifi cantly aff ect the carbon emissions generated by humans. The concept of low carbon community has been accordingly proposed to reduce global greenhouse gas emissions and accelerate a prosperous low carbon economy. In this paper, various low carbon technologies, strategies, and lifestyles, involving community planning, advanced green building technologies, renewable energy supply systems, sustainable transportation, water recycle and waste management systems, change of low carbon living mode and energy-related behavior were thoroughly discussed. The current status of low carbon community practices in both developed countries and China, together with their corresponding achievements, has been reviewed. Evaluation tools and indicators were analyzed to provide important references for policy makers in supporting sustainable community construction activities. Furthermore, recommendations were proposed to facilitate the development of low carbon communities in the future.

  • 154.
    Lv, Y.
    et al.
    School of Mechanical and Automotive Engineering, Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.
    Si, P.
    School of Architecture, Tsinghua University, Peking, China.
    Liu, J.
    State Key Laboratory of Clean and Efficient Coal-fired Power Generation and Pollution Control, Nanjing, China.
    Ling, W.
    State Key Laboratory of Clean and Efficient Coal-fired Power Generation and Pollution Control, Nanjing, China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH.
    Performance of a hybrid solar photovoltaic - Air source heat pump system with energy storage2019Ingår i: Energy Procedia, Elsevier Ltd , 2019, s. 1311-1316Konferensbidrag (Refereegranskat)
    Abstract [en]

    The paper introduced a smart renewable energy based microgrid system which is composed of three subsystems: solar photovoltaic subsystem, air source heat pump subsystem and energy storage subsystem. This microgrid system was applied to the demonstration project located in Xining City, Qinghai Province, China. The energy performance of the smart renewable energy based microgrid system was evaluated and compared with that of traditional energy supply system which totally depends on the electricity grid and natural gas. The comparison study demonstrates that the proposed hybrid energy supply system is superior to traditional system, significantly decreasing additional energy consumption for buildings and reducing pollutant emissions.

  • 155.
    Lv, Y.
    et al.
    Qilu University of Technolog, China.
    Si, P.
    China Southwest Architecture Design and Research Institute Corp., Ltd., China.
    Liu, X.
    China Southwest Architecture Design and Research Institute Corp., Ltd., China.
    Rong, X.
    China Southwest Architecture Design and Research Institute Corp., Ltd., China.
    Feng, Y.
    China Southwest Architecture Design and Research Institute Corp., Ltd., China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    An optimized model for solar thermal collectors based on concept of effective heat collection2016Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, nr 88, s. 470-475Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The performance of solar collector highly relies on its tilt angle with respect to horizontal plane and orientation (surface azimuth angle) of the collector. The effective heat collection concept was proposed and an optimized mathematical model was further developed to determine the optimum tilt angle and orientation for the solar collector. The developed model was applied in a case study of the Lhasa district, in comparison with the results obtained in accordance with conventional optimization results. The research results showed that, there is about 5° deviation between the optimum results obtained according to effective heat collecting capacity and the optimum results obtained according to maximum total solar radiation falling on the solar collector. 

  • 156.
    Lv, Y.
    et al.
    Qilu University of Technology, School of Mechanical and Automotive .
    Si, P.
    School of Architecture, Tsinghua University, Peking, China.
    Rong, X.
    China Southwest Architecture Design and Research Institute Corp. Ltd., Chengdu, China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    An Optimization Method for CCHP and River Water Source Heat Pump Combined System2018Ingår i: Energy Procedia, Elsevier Ltd , 2018, s. 592-597Konferensbidrag (Refereegranskat)
    Abstract [en]

    Combined Cooling, Heating and Power (CCHP) systems have been widely utilized in the buildings to achieve high efficiency cascade utilization of energy. Heat pump is another widely utilized technology to improve the building energy efficiency. The paper presents a hybrid system which integrates the CCHP with river water source heat pump to combine the advantages of these two technologies. A physical model with energy storage module was firstly developed for the combined system. A case study was further carried out to investigate the optimized configuration and operation performance of the combined system.

  • 157.
    Lv, Y.
    et al.
    Qilu University of Technology (Shandong Academy of Sciences), Jinan, China.
    Si, P.
    Tsinghua University, Peking, China.
    Rong, X.
    China Southwest Architecture Design and Research Institute Corp. Ltd., Chengdu, China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology, Stockholm, Sweden.
    Feng, Y.
    China Southwest Architecture Design and Research Institute Corp. Ltd., Chengdu, China.
    Zhu, X.
    Sichuan Provincial Architectural Design Institute, Chengdu, China.
    Determination of optimum tilt angle and orientation for solar collectors based on effective solar heat collection2018Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 219, s. 11-19Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Determination of optimum tilt angle and orientation of solar collectors by maximizing the total solar radiation may overestimate the energy production benefits, because a considerable amount of solar radiation is ineffective for practical solar collectors. In this paper, the concept of effective solar heat collection is proposed to rule out the ineffective solar radiation that could not be converted to available energy. Accordingly, an optimized mathematical model is developed and used to determine the optimum tilt angle and orientation of solar collectors installed in Lhasa during the heating season. Compared with the total solar radiation based optimum results, there is a deviation of 5° in the optimum orientations based on the effective solar heat collection. The case study shows that it is not advisable to adjust the optimum tilt angle on a monthly basis because there is no significance change in total solar energy gains in comparison with the case of no such adjustment during the heating season. In addition, the correction factors to achieving the maximum effective solar heat collection are given at different tilt angles and orientations to guide installation of solar collectors in practical engineering applications.

  • 158.
    Lv, Y.
    et al.
    School of Mechanical and Automotive Engineering, Qilu University of Technology, Jinan, China.
    Xia, L.
    School of Mechanical and Automotive Engineering, Qilu University of Technology, Jinan, China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Bi, J.
    School of Mechanical and Automotive Engineering, Qilu University of Technology, Jinan, China.
    Design of a Hybrid Fiber Optic Daylighting and PV Solar Lighting System2018Ingår i: Energy Procedia, Elsevier Ltd , 2018, s. 586-591Konferensbidrag (Refereegranskat)
    Abstract [en]

    Residential buildings with limited natural lighting are generally lit by fuel-based electricity which contributes to increase of CO2 concentration in the atmosphere. This paper presents the design of a hybrid fiber-optic daylighting and PV solar lighting system for household applications. The system is composed of a light collecting subsystem, a light guiding subsystem, an optical fiber light diffuser subsystem and corresponding control system. Preliminary system performance shows that, the developed system could provide comfortable and natural indoor illumination. Meanwhile, the hybrid lighting system can provide an average of 9h of electric lighting under clear sky conditions, and reduce 158.2kg of carbon dioxide emission in a year within the tested dark room of 5m2.

  • 159.
    Lyngfelt, A.
    et al.
    Chalmers University of Technology, Göteborg, Sweden.
    Epple, B.
    Technische Universität Darmstadt, Darmstadt, Germany.
    Adanez, J.
    Instituto Carboquimica (CSIC), Zaragoza, Spain.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH-Royal Institute of Technology, Stockholm, Sweden.
    The 3rd International Conference on Chemical Looping 20142015Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 157, s. 285-287Artikel i tidskrift (Refereegranskat)
  • 160. M, Naqvi
    et al.
    Yan, Jinyue
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Black liquor gasification integrated in pulp and paper mills: A critical review2010Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 101, nr 21, s. 8001-8015Artikel i tidskrift (Övrigt vetenskapligt)
  • 161.
    Mancuso, Martin Vincent
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Campana, Pietro Elia
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Evaluation of Grid-Connected Micro-Grid Operational Strategies2019Konferensbidrag (Refereegranskat)
    Abstract [en]

    This study investigates the operational performances of a grid-connected microgrid with integrated solar photovoltaic and battery energy storage. The study is based upon the techno-economic specifications and theoretical performance of the distributed energy resource and storage systems, as well as on measured consumer load data and electrical utility retail and distribution data for representative residential and commercial loads for the city of Västerås, Sweden. The open-source Matlab®-based simulation tool, OptiCE, is used for performing simulations and optimization. To support the attainment of one of the objectives, peak shaving of the consumer load, a battery operational strategy algorithm has been developed to balance peak shaving and PV self-consumption. Comparisons among three types of battery, lead-acid, lithium-ion and vanadium-redox flow, are also performed. A 117 kW p photovoltaic system paired with a lithium-ion battery of 41.1 kWh capacity is the optimal solution found for the considered commercial load. The calculated battery capacity represents the best trade-off for the set multi-objective optimization problem. The simulation of this system predicts the possibility to shave the customer load profile peaks up to 20% for the month of April. The corresponding self-consumption ratio is 88%. Differences in the relationship between the load profiles and the system performance have been qualitatively noted. Furthermore, the simulation results for lead-acid, lithium-ion and vanadium-redox flow battery systems reveal that lithium-ion batteries delivers the best trade-off between total annualized cost and peak shaving performance for both residential and commercial applications.

  • 162.
    Markovska, N.
    et al.
    Macedonian Academy of Sciences and Arts (RCESD-MASA), Macedonia.
    Klemeš, J. J.
    University of Pannonia Veszprém, Hungary.
    Duić, N.
    University of Zagreb, Croatia.
    Guzović, Z.
    University of Zagreb, Croatia.
    Vad Mathiesen, B.
    Aalborg University, Denmark.
    Lund, H.
    Aalborg University, Denmark.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Sustainable development of energy, water and environment systems2014Ingår i: Energy, ISSN 0360-5442, E-ISSN 1873-6785, Vol. 76, s. 1-3Artikel i tidskrift (Övrigt vetenskapligt)
  • 163.
    Markovska, Natasa
    et al.
    Macedonian Acad Sci & Arts, Res Ctr Energy & Sustainable Dev, Skopje 1000, Macedonia..
    Klemes, Jiri Jaromir
    Univ Pannonia, Ctr Proc Integrat & Intensificat, Veszprem, Hungary..
    Duic, Neven
    Univ Zagreb, Fac Mech Engn & Naval Architecture, Dept Energy Power Engn & Environm, Zagreb 10002, Croatia..
    Guzovic, Zvonimir
    Univ Zagreb, Fac Mech Engn & Naval Architecture, Dept Energy Power Engn & Environm, Zagreb 10002, Croatia..
    Mathiesen, Brian Vad
    Aalborg Univ, Dept Dev & Planning, DK-2450 Copenhagen SV, Denmark..
    Lund, Henrik
    Aalborg Univ, Dept Dev & Planning, DK-9000 Aalborg, Denmark..
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Sustainable development of energy, water and environment systems2014Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 135, s. 597-599Artikel i tidskrift (Övrigt vetenskapligt)
  • 164.
    Mundaca, Luis
    et al.
    Lund University, Sweden.
    Neij, Lena
    Lund University, Sweden.
    Markandya, Anil
    Basque Ctr Climate Change, Bilbao, Spain .
    Hennicke, Peter
    Wuppertal Inst Climate Environm & Energy, Wuppertal, Germany.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH Royal Inst Technol, Stockholm, Sweden.
    Towards a Green Energy Economy?: Assessing policy choices, strategies and transitional pathways2016Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 179, s. 1283-1292Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The term 'Green Energy Economy' (GEE) received increasing policy and scientific attention following the 2008-2009 global financial crisis, leading to the implementation of numerous 'Green Growth' economic stimulus packages that targeted low-carbon energy technologies. These initiatives were portrayed as key elements in the transition to a green economy, in which low-carbon energy systems would play a vital role. However, and setting aside conceptual variations, uncertainties and fragmented knowledge remain in the interplay between a green economy, low-carbon energy systems and governance. This research area raises various questions regarding the performance, implications and complexities of policies and strategies addressing GEE transitional pathways. In addition, achieving a GEE compatible with climate, social and economic goals is an enormous challenge for society, and goes beyond the technological domain. This special issue provides a series of articles that critically investigate these concerns from an interdisciplinary point of view, and provide relevant policy insights using a variety of analytical approaches. Overall, they call for strong leadership, ambitious policy instruments, rigorous assessments, effective multi-level governance, inter/national cooperation, institutional capacity development, and the immediate alignment of the financial system with the energy sector on numerous challenges associated with the GEE transition. It is concluded that not only from an environmental point of view, but also due to economic and social reasons, the GEE transition needs to be accelerated and that a radical transformation is required. 

  • 165.
    Möllersten, Kenneth
    et al.
    International Institute for Applied Systems Analysis, Austria .
    Gao, Lin
    Luleå University of Technology, Sweden.
    Yan, Jinyue
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling. Luleå University of Technology, Sweden.
    CO2 capture in pulp and paper mills: CO2 balances and preliminary cost assessment2006Ingår i: Mitigation and Adaptation Strategies for Global Change, ISSN 1381-2386, E-ISSN 1573-1596, Vol. 11, nr 5-6, s. 1129-1150Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper investigates overall CO2 balances of combined heat and power (CHP) plants with CO2 capture and storage (CCS) in Kraft pulp and paper mills. The CHP plants use biomass-based fuels and feature advanced gasification and combined cycle technology. Results from simple process simulations of the considered CHP plants are presented. Based on those results and taking into account the major direct and indirect changes in CO2 emissions, the study shows that implementing CCS leads to steep emission reductions. Furthermore, a preliminary cost assessment is carried out to analyse the CO2 mitigation cost and its dependence on the distance that the CO2 must be transported to injection sites.

  • 166.
    Naqvi, M.
    et al.
    KTH.
    Yan, Jinyue
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Energy conversion performance of black liquor gasification to hydrogen production using direct causticization with CO2 capture2012Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 110, s. 637-644Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper estimates potential hydrogen production via dry black liquor gasification system with direct causticization integrated with a reference pulp mill. The advantage of using direct causticization is elimination of energy intensive lime kiln. Pressure swing adsorption is integrated in the carbon capture process for hydrogen upgrading. The energy conversion performance of the integrated system is compared with other bio-fuel alternatives and evaluated based on system performance indicators. The results indicated a significant hydrogen production potential (about 141 MW) with an energy ratio of about 0.74 from the reference black liquor capacity (about 243.5 MW) and extra biomass import (about 50 MW) to compensate total energy deficit. About 867,000 tonnes of CO2 abatement per year is estimated i.e. combining CO2 capture and CO2 offset from hydrogen replacing motor gasoline. The hydrogen production offers a substantial motor fuel replacement especially in regions with large pulp and paper industry e.g. about 63% of domestic gasoline replacement in Sweden. (C) 2012 Elsevier Ltd. All rights reserved.

  • 167.
    Naqvi, M.
    et al.
    KTH.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Synthetic natural gas (SNG) production at pulp mills from a circulating fluidized bed black liquor gasification process with direct causticization2010Ingår i: Proceedings of the 23rd International Conference on Efficiency, Cost, Optimization, Simulation, and Environmental Impact of Energy Systems, ECOS 2010, 2010, s. 83-91Konferensbidrag (Refereegranskat)
    Abstract [en]

    Synthetic natural gas (SNG) production from black liquor gasification (BLG) replacing conventional recovery cycle at chemical pulp mills is an attractive option to reduce CO2 emissions and replace fossil natural gas. This paper evaluates the potential of SNG production from a circulating fluidized bed BLG process with direct causticization by investigating synthesis gas composition, purity requirements for SNG and process integration with the reference pulp mill producing 1000 air dried tonnes (ADt) of pulp per day. The objective of this study is to estimate the integrated process efficiency from black liquor (BL) conversion to SNG and to quantify the differences in overall process efficiencies of various bio-refinery options. The models include a BLG Island including BL gasifier, synthesis gas cooling and cleaning unit, methanation with SNG upgrading and a power boiler. The result indicates a large potential of SNG production from BL but at a cost of additional biomass import to compensate energy deficit in terms of BL conversion to SNG. In addition, the study shows a significant CO2 abatement when CO2 capture is carried out in SNG upgrading and also reducing CO2 emissions when SNG potentially replaces fossil natural gas.

  • 168.
    Naqvi, M.
    et al.
    Royal Institute of Technology (KTH).
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    System analysis of dry black liquor gasification based synthetic gas production comparing oxygen and air blown gasification systems2013Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 112, s. 1275-1282Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The black liquor gasification based bio-fuel production at chemical pulp mill is an attractive option to replace conventional recovery boilers increasing system energy efficiency. The present paper studies circulating fluidized bed system with direct causticization using TiO2 for the gasification of the black liquor to the synthesis gas. The advantage of using direct causticization is the elimination of energy-intensive lime kiln which is an integral part of the conventional black liquor recovery system. The study evaluates the effects of gasifying medium i.e. oxygen or air, on the fluidized bed gasification system, the synthesis gas composition, and the downstream processes for the synthesis gas conversion to the synthetic natural gas (SNG). The results showed higher synthetic natural gas production potential with about 10% higher energy efficiency using oxygen blown gasification system than the air blown system. From the pulp mill integration perspective, the material and energy balance results in better integration of air blown system than the oxygen blown system, e.g. less steam required to be generated in the power boiler, less electricity import, and less additional biomass requirement. However, the air blown system still requires a significant amount of energy in terms of the synthesis gas handling and gas upgrading using the nitrogen rejection system.

  • 169.
    Naqvi, Muhammad
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Karlstad University, Sweden.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology (KTH), Sweden.
    Naqvi, S. R.
    NUST, Pakistan.
    Nizami, A. S.
    King Abdulaziz University, Saudi Arabia.
    Salman, Chaudhary Awais
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Danish, M.
    ECUST, China.
    Farooq, U.
    ECUST, China.
    Rehan, M.
    King Abdulaziz University, Saudi Arabia.
    Khan, Z.
    University of Glasgow, United Kingdom.
    Qureshi, A. S.
    University of Sindh, Pakistan.
    Polygeneration system integrated with small non-wood pulp mills for substitute natural gas production2018Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 224, s. 636-646Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This study aims to examine the potential substitute natural gas (SNG) production by integrating black liquor gasification (BLG) island with a small wheat straw-based non-wood pulp mills (NPM), which do not employ the black liquor recovery cycle. For such integration, it is important to first build knowledge on expected improvements in an overall integrated non-wood pulp mill energy system using the key performance indicators. O2-blown circulating fluidized bed (CFB) gasification with direct causticization is integrated with a reference small NPM to evaluate the overall performance. A detailed economic analysis is performed together with a sensitivity analysis based on variations in the rate of return due to varying biomass price, total capital investment, and natural gas prices. The quantitive results showed considerable SNG production but significantly reduced electricity production. There is a substantial CO2 abatement potential combining CO2 capture and CO2 mitigation from SNG use replacing compressed natural gas (CNG) or gasoline. The economic performance through sensitivity analysis reflects significant dependency on both substitute natural gas production and natural gas market price. Furthermore, the solutions to address the challenges and barriers for the successful commercial implementation of BLG based polygeneration system at small NPMs are discussed. The system performance and discussion on the real application of integrated system presented in this article form a vital literature source for future use by large number of small non-wood pulp industries.

  • 170.
    Naqvi, Muhammad Raza
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Complementing existing CHP plants using biomass for production of hydrogen and burning the residual gas in a CHP boiler2017Ingår i: Biofuels, ISSN 1759-7269, E-ISSN 1759-7277, nr 6, s. 675-683Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Biorefinery systems at combined heat and power (CHP) plants represent numerous technical, economic and environmental benefits by utilizing the existing biomass handling infrastructure and producing biofuels together with heat and power. This study evaluates the economic feasibility of integrating biomass gasification to an existing CHP plant. Integration includes biomass gasification with downstream processing of the synthesis gas to remove particles and tars, condense out water, remove CO2 and use membrane filtration (polyamide membrane) to extract hydrogen. The separated residual gas components are utilized as extra fuel to the boiler in the CHP plant. Approximately 58.5 MWth of synthesis gas can be produced from a 90 MWth plant that represents 16.4 MWthof hydrogen. The rest of the heating value of produced synthesis gas (in the form of methane and carbon monoxide) is utilized for heat and power production. From an economic perspective, the production cost of hydrogen is estimated to be 0.125–0.75 €/kg. This can be compared to the US governments goal that H2 produced by wind power plus electrolyzers should have a maximum cost of 2.8–3.4 €/kg. The lower cost is for a unit operating at 3 bar and assuming that the costs are split between H2 and the syngas residue that is combusted, while the higher prices assume an atmospheric gasifier and all costs are put on the H2 produced.

  • 171.
    Naqvi, Muhammad Raza
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Jan, Yinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Naqvi, Salman Raza
    National University of Sciences & Technology (NUST), Pakistan.
    Off-grid electricity generation using mixed biomass compost:: A scenario-based study with sensitivity analysis2017Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 201, s. 363-370Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The aim of the study is to investigate the viability of waste gasification based off-grid electricity gener- ation utilizing mixed biomass composts (mixture of rice hulls with cow/poultry manure compost). The economic viability is studied on the different scenarios with considerations of (1) levels of electricity demand and utilization, (2) costs of variable biomass mix, (3) combined domestic and cottage industry business model, and (4) influence of governmental investments. The levelized cost of electricity (LCOE) is used as an indicator to measure the competitiveness of gasification based off-grid electricity genera- tion. The plant loading and the capacity factor have been used to assess the impacts of different scenarios. A sensitivity analysis of key parameters based on variations in annual operational hours, plant efficiency, plant cost and biomass supply cost is conducted. Based on levels of electricity demand and utilization, the LCOE ranged between 40 US cents/kW h and 29 US cents/kW h based on the plant loading and the capac- ity factor. The business revenue would not change considerably despite better plant utilization and reduced levelized cost of electricity if all the consumers, both basic or medium, are charged with the flat tariff. The part load operation will be costly despite considerably low capital investment per kW in com- parison with PV or solar based plants. There is a large potential of off-grid electricity generation but the estimated off-grid electricity price is found to be higher in all scenarios than average grid-based electric- ity tariff. Moreover, the challenges for the implementation of the real off-grid electricity generation plant are discussed. 

  • 172.
    Naqvi, Muhammad Raza
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Biorefinery: Production of Biofuel, Heat, and Power Utilizing Biomass2015Ingår i: Handbook of Clean Energy Systems / [ed] Prof. Jinyue Yan, United States: WILEY , 2015Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    The world’s energy consumption is projected to increase rapidly that will cause depletion of known fossil fuel resources, global warming and threat to future energy security. Biomass is likely to play a significant role in the future energy systems replacing conventional fuels due to strict regulations for reducing greenhouse gas (GHG) emissions as well as contributing as additional resource in the global energy mix. Biomass is processed in a bio-refinery facility for polygeneration of bio-energy products such as biofuels, heat, and power. Polygeneration system can be categorized based on various process routes producing electricity or biofuels or even providing only heat e.g. biomass gasification system, integrated biogas production with combined heat and power by treating organic waste, tri-generation systems etc. The successful commercialization of bio-refinery systems for polygeneration require pilot plants to demonstrate improvements in energy efficiency,  substantial biofuel, heat and power production potential from biomass together with reduced cost. From the sustainability perspective, bio-refinery systems show numerous economic, social and environmental benefits including diversification in biomass resources and bio-energy products.

  • 173.
    Naqvi, Muhammad Raza
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    First-Generation Biofuels2015Ingår i: HANDBOOK OF CLEAN ENERGY SYSTEMS / [ed] Prof. Jinyue Yan, UNITED STATES: John Wiley & Sons, 2015Kapitel i bok, del av antologi (Refereegranskat)
    Abstract [en]

    Global energy demand is primarily dependent on the fossil fuel resources and the energy consumption is growing significantly that will cause increased concentration of greenhouse gases (GHG) in the atmosphere and depletion of known non-renewable energy resources that will cause threat to future energy security. The fossil resources are regarded as un-sustainable in terms of economy, ecology and environmental perspective. The increased utilization of biomass can play a significant role in replacing conventional fossil-based fuels and reducing emissions due to strict regulations for reducing greenhouse gas (GHG) emissions. Biomass based fuels can contribute as additional energy resource in the global energy mix. This chapter has discussed first generation biofuel, concept of bio-refineries, first generation feedstock derived bio-fuels, global first generation biofuel producing countries/regions and major sustainability challenges. The most common first generation biofuels include bio-ethanol, bio-diesel and bio-gas derived mainly from corn, sugarcane, soybean, vegetable oil, palm oil, wastes etc. From the sustainability perspective, first generation biofuels face numerous sustainability challenges including food and fuel competition, change in land-use, potential increased GHG emissions due to fossil fuel utilization in the upstream processes. First generation biofuels appears unsustainable because of the potential stress that their production places on food commodities. The economic aspects of first generation biofuel largely depend upon the type of feedstock and region where the feedstock have been cultivated and produced. Food prices will be affected due to increased production of energy crops that potentially compete with food crops for land use. In addition, the substantial production of biomass and conversion of biomass feedstock to biofuel may create new jobs and increase revenue from the agricultural sector.

  • 174. Naqvi, Muhammad
    et al.
    Suleman, Tahir M
    Jinyue, Yan
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling. Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    POTENTIAL OF SYNTHETIC GASPRODUCTION FROM BLACK LIQUORGASIFICATION BASED BIO-REFINERYSYSTEM INTEGRATED WITH KRAFTPULP MILLS IN PAKISTAN2013Konferensbidrag (Refereegranskat)
  • 175.
    Naqvi, Muhammad
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Department of Chemical Engineering and Technology, KTH.
    Yan, Jinyue
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling. Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling. Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Bio-refinery system in a pulp mill for methanol production with comparison of pressurized black liquor gasification and dry gasification using direct causticization2012Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 90, nr 1, s. 24-31Artikel i tidskrift (Övrigt vetenskapligt)
    Abstract [en]

    Black liquor gasification (BLG) for bio-fuel or electricity production at the modern pulp mills is a field incontinuous evolution and the efforts are considerably driven by the climate change, fuel security, andrenewable energy. This paper evaluates and compares two BLG systems for methanol production: (i) oxygenblown pressurized thermal BLG; and (ii) dry BLG with direct causticization, which have beenregarded as the most potential technology candidates for the future deployment. A key objective is toassess integration possibilities of BLG technologies with the reference Kraft pulp mill producing1000 air dried tonnes (ADt) pulp/day replacing conventional recovery cycle. The study was performedto compare the systems’ performance in terms of potential methanol production, energy efficiency,and potential CO2 reductions. The results indicate larger potential of black liquor conversion to methanolfrom the pressurized BLG system (about 77 million tonnes/year of methanol) than the dry BLG system(about 30 million tonnes/year of methanol) utilizing identical amount of black liquor available worldwide(220 million tDS/year). The potential CO2 emissions reduction from the transport sector is substantiallyhigher in pressurized BLG system (117 million tonnes/year CO2 reductions) as compared to dry BLGsystem (45 million tonnes/year CO2 reductions). However, the dry BLG system with direct causticizationshows better results when considering consequences of additional biomass import. In addition,comparison of methanol production via BLG with other bio-refinery products, e.g. hydrogen, dimethylether (DME) and bio-methane, has also been discussed.

  • 176.
    Naqvi, Muhammad
    et al.
    KTH, Energiprocesser.
    Yan, Jinyue
    KTH, Energiprocesser.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Integrated Synthetic Natural Gas Production from Oxygen Blown Dry Black Liquor Gasification Process with Direct Causticization2011Konferensbidrag (Refereegranskat)
  • 177.
    Naqvi, Muhammad
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH, Energiprocesser.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. KTH, Energiprocesser.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Sustainability Aspects of Transport Bio-fuels from Black liquor gasification – a System AnalysisIngår i: Energy Policy, ISSN 0301-4215, E-ISSN 1873-6777Artikel i tidskrift (Övrigt vetenskapligt)
  • 178.
    Naqvi, Muhammad
    et al.
    KTH.
    Yan, Jinyue
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Synthetic gas production from dry black liquor gasification process using direct causticization with CO2 capture2012Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 97, s. 49-55Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Synthetic natural gas (SNG) production from dry black liquor gasification (DBLG) system is an attractive option to reduce CO2 emissions replacing natural gas. This article evaluates the energy conversion performance of SNG production from oxygen blown circulating fluidized bed (CFB) black liquor gasification process with direct causticization by investigating system integration with a reference pulp mill producing 1000 air dried tonnes (ADt) of pulp per day. The direct causticization process eliminates use of energy intensive lime kiln that is a main component required in the conventional black liquor recovery cycle with the recovery boiler. The paper has estimated SNG production potential, the process energy ratio of black liquor (BL) conversion to SNG, and quantified the potential CO2 abatement. Based on reference pulp mill capacity, the results indicate a large potential of SNG production (about 162 MW) from black liquor but at a cost of additional biomass import (36.7 MW) to compensate the total energy deficit. The process shows cold gas energy efficiency of about 58% considering black liquor and biomass import as major energy inputs. About 700 ktonnes per year of CO2 abatement i.e. both possible CO2 capture and CO2 offset from bio-fuel use replacing natural gas, is estimated. Moreover, the SNG production offers a significant fuel replacement in transport sector especially in countries with large pulp and paper industry e.g. in Sweden, about 72% of motor gasoline and 40% of total motor fuel could be replaced.

  • 179.
    Naqvi, Muhammad
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology (KTH), Stockholm, Sweden.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Naqvi, S. R.
    National University of Sciences and Technology (NUST), Islamabad, Pakistan.
    Waste Biomass Gasification Based off-grid Electricity Generation: A Case Study in Pakistan2016Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 103, s. 406-412Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The objective is to investigate the waste gasification based off-grid electricity generation in developing countries like Pakistan utilizing mixed biomass composts (mixture of agricultural wastes including rice hulls and wheat straw with cow/poultry manure compost). Different scenarios are compared; (1) levels of electricity demand and utilization, (2) costs for variable biomass mix, (3) combined domestic and cottage industry business model. The levelized cost of electricity (LCOE) is used as an indicator to measure the competitiveness of off-grid electricity generation. There is a large potential of off-grid electricity generation. However, the estimated off-grid electricity price is found to be higher in all scenarios than average governmental electricity tariff.

  • 180.
    Naqvi, Muhammad
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Danish, Muhammad
    E China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai, Peoples R China..
    Farooq, Usman
    E China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai, Peoples R China..
    Lu, Shuguang
    E China Univ Sci & Technol, State Environm Protect Key Lab Environm Risk Asse, Shanghai, Peoples R China..
    An experimental study on hydrogen enriched gas with reduced tar formation using pre-treated olivine in dual bed steam gasification of mixed biomass compost2016Ingår i: International journal of hydrogen energy, ISSN 0360-3199, E-ISSN 1879-3487, Vol. 41, nr 25, s. 10608-10618Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The study investigated the effects of pre-treated olivine in dual bed steam gasification (DBSG) of biomass compost in order to produce H-2 enriched synthesis gas with significantly reduced tar formation. The DBSG employed circulating fluidized bed (CFB) of silica sand as first stage and fixed catalytic bed of pre-treated olivine as second stage. The mixed biomass compost contained 15-20 wt. % of agri-residues (mainly wheat straw) and 80-85 wt. % of cow manure. The study compared the synthesis gas distribution and tar reductions using pre-treated olivine in the DBSG scheme with Ni-Al based DBSG scheme. The effects of operating condition on the synthesis gas distribution and tar formation are studied such as: (i) effect of steam to biomass ratio, (ii) effects of relative oxidation (relox), (iii) operating temperature of the reactor, (iv) performance and comparison of employed catalysts, and (v) yield of synthesis gas together with carbon conversion efficiency. Experimental analysis showed that H-2 concentration obtained from pre-treated olivine based DBSG is considerably higher than H-2 produced from compared gasification schemes. The H-2 production is favoured at higher temperatures and higher SBR under the influence of pre-treated olivine catalyst. However, the conditions are less advantageous for the production of CO and CH4. Among all experiments, the synthesis gas composition obtained at SBR = 1.40 and at 800 degrees C consisted of highest H-2 concentration (35 vol.% d.n.f) in the pre-treated olivine DBSG. Higher steam to biomass ratio (SBR) resulted in lower cold gas energy efficiency and lower heating value of the synthesis gas mainly due to large steam content in the gas. The tar removal efficiency of 98% is achieved with the pre-treated olivine DBSG system. The total tar content is significantly reduced (approximate to 40%) in the DBSG with pre-treated olivine. Higher relative oxidation resulted in increased concentration of CO2 in the synthesis gas due to increased partial oxidation of organic matter in the gasifier. The pre-treated olivine catalyst in the DBSG consistently promoted the process of steam reforming and tar cracking and thus improved the quality of the syngas by limiting the tar contents.

  • 181.
    Naqvi, Muhammad
    et al.
    Department of Chemical Engineering/Energy Processes, Royal Institute of Technology.
    Yan, Jinyue
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Fröling, M.
    Department of Chemical and Biological Engineering, Chalmers University of Technology.
    Bio-refinery system of DME or CH4 production from black liquor gasification in pulp mills2010Ingår i: Bioresource Technology, ISSN 0960-8524, E-ISSN 1873-2976, Vol. 101, nr 3, s. 937-944Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    There is great interest in developing black liquor gasification technology over recent years for efficient recovery of bio-based residues in chemical pulp mills. Two potential technologies of producing dimethyl ether (DME) and methane (CH4) as alternative fuels from black liquor gasification integrated with the pulp mill have been studied and compared in this paper. System performance is evaluated based on: (i) comparison with the reference pulp mill, (ii) fuel to product efficiency (FTPE) and (iii) biofuel production potential (BPP). The comparison with the reference mill shows that black liquor to biofuel route will add a highly significant new revenue stream to the pulp industry. The results indicate a large potential of DME and CH4 production globally in terms of black liquor availability. BPP and FTPE of CH4 production is higher than DME due to more optimized integration with the pulping process and elimination of evaporation unit in the pulp mill.

  • 182.
    Nehrenheim, Emma
    et al.
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling. Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Odlare, Monica
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling. Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Fredrik, Vallin
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Eva, Thorin
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Dahlquist, Erik
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Algal blooms - an environmental problem or a potential energy resource? the potentials for algae cultivation in lake Mälaren, an eutrophicated lake in Sweden2010Konferensbidrag (Refereegranskat)
  • 183.
    Nemet, A.
    et al.
    Faculty of Chemistry and Chemical Engineering, University of Maribor, Slovenia.
    Klemeš, J. J.
    Faculty of Information Technology and Bionics, Pázmány Péter Catholic University, Budapest, Hungary.
    Duić, N.
    Department of Energy, Power Engineering and Environment, University of Zagreb, Faculty of Mechanical Engineering and Naval Architecture, Zagreb, Croatia.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. oyal Institute of Technology (KTH), Stockholm, Sweden.
    Improving sustainability development in energy planning and optimisation2016Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 184, s. 1241-1245Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This special issue of Applied Energy contains articles developed from initial ideas related to the 10th Conference on Sustainable Development of Energy, Water and Environment Systems (SDEWES) held in Dubrovnik, Croatia during September 27 - October 2, 2015. The main focus of the event is the sustainability development joining all required areas for achieving as improving the knowledge on method, policies and technologies as well as dissemination of the results. Overall, 64 extended manuscripts have been invited as candidate articles. After a thorough review procedure, 23 articles have been selected to be published. The topics attained in the focus of this Special Issue include Integration, Optimisation and Analysis of energy systems as well as dissemination of the developed methodology and results obtained.

  • 184.
    Niu, Z.
    et al.
    Institute of the Building Environment & Sustainability Technology, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China.
    Yu, J.
    Institute of the Building Environment & Sustainability Technology, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China.
    Cui, X.
    Department of Chemical Engineering and Technology/Energy Processes, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden.
    Yang, Xiaohu
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Department of Chemical Engineering and Technology/Energy Processes, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden; Institute of the Building Environment & Sustainability Technology, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China.
    Sun, Y.
    Institute of the Building Environment & Sustainability Technology, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Institute of the Building Environment & Sustainability Technology, School of Human Settlements and Civil Engineering, Xi’an Jiaotong University, Xi’an 710049, China; Department of Chemical Engineering and Technology/Energy Processes, Royal Institute of Technology (KTH), 100 44 Stockholm, Sweden.
    Experimental investigations on the thermal energy storage performance of shell and tube unit with composite phase change materials2019Ingår i: Energy Procedia, Elsevier Ltd , 2019, Vol. 158, s. 4889-4896Konferensbidrag (Refereegranskat)
    Abstract [en]

    This work presented experimental investigations on the thermal energy storage performance of the shell and tube unit with composite phase change materials (PCM). A cylindrical heat storage tank filled with open-cell copper foam was proposed and its melting process characteristics were studied. A designed test system was established to record the PCM real-time temperature data. The results showed that, compared with traditional smooth-tube phase-change heat exchangers, the composite PCM unit accelerated the bottom paraffin melting. The temperature disparity among different height reduced, which resulted in better internal temperature uniformity. Due to the expanded heat transfer area, improved heat transfer coefficient and weakened natural convection, the bottom phase-change materials in the composite-PCM heat-storage unit melt faster. 

  • 185.
    Nookuea, Worrada
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Tan, Yuting
    Royal Inst Technol, Stockholm, Sweden.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Sensitivity study of thermo-physical properties of gas phase on absorber design for CO2 capture using monoethanolamine2015Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 75, s. 2305-2310Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Absorption of CO2 with aqueous amines in post-combustion capture is characterized as mass transfer process with chemical reaction. Hydrodynamics and mass transfer in gas and liquid phases in a packed column have significant influences on absorber design especially for the design of packing height. In this paper, the sensitivity study has been conducted to investigate the impacts of gas phase density, viscosity and diffusivity on the hydrodynamics and mass transfer and further the total packing height of a countercurrent flow with random packing column, using reactive absorption process and integral rate-based models. Results show that density and diffusivity have opposite effect to viscosity. Amongst various properties, diffusivity has the most significant effect on the packing height compared to density and viscosity. Overestimation of diffusivity of 5% may result in decrease of 3.2% of packing height. Moreover, developing more accurate diffusivity model should be prioritized for more accurate absorber design. 

  • 186.
    Nookuea, Worrada
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Wang, Fu
    Tianjin University, China.
    Yang, Jie
    University of Shanghai for Science and Technology, Shanghai, China.
    Tan, Yuting
    Royal Institute of Technology, Sweden .
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yu, Xinhai
    East China University of Science and Technology, Shanghai, China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Viscosity data of aqueous MDEA–[Bmim][BF4] solutions within carbon capture operating conditions2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 105, s. 4581-4586Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Post–combustion capture with chemical absorption shows higher potential for commercial scale application compared with other technologies. To capture CO2 from the industrial and power plant’s flue gases, aqueous alkanolamine solutions are widely used. However, several drawbacks from utilizing the aqueous alkanolamines such as MEA still need to be solved. For example, alkanolamine solutions require intensive energy for regeneration and cause severe corrosion to the equipment though they have high reactivity in capturing CO2. Ionic liquids have been of interest in the recent development of chemical absorption according to their unique characteristics including wide liquid range, negligible volatility and thermal stability. However, due to their high price, high viscosity and low absorption capacity compared to alkanolamines, ionic liquids are still non–desirable for industrial applications.

    One possible solution to improve the performance of ionic liquids is to use mixtures of ionic liquids and alkanolamines. For a better understanding of the absorption using the mixture of aqueous alkanolamines and ionic liquids, the knowledge of thermo–physical properties of the solutions, especially the viscosity and density are of importance. This paper reports the measured viscosity of MDEA–[Bmim][BF4] aqueous mixtures at various temperatures and concentrations. It was found that the viscosity increase with an increase in [Bmim][BF4] concentration, but decrease with an increase in temperature. Moreover, the impact of temperature on the viscosity is more significant at low temperature range.

  • 187.
    Nookuea, Worrada
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Zambrano, Jesús
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Tan, Yuting
    Royal Institute of Technology, Sweden.
    Li, Hailong
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology, Stockholm, Sweden.
    Comparison of Mass Transfer Models on Rate-Based Simulations of CO2 Absorption and Desorption Processes2017Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 142, s. 3747-3752Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    One of the keys available options for the large scale carbon capture and storage is the solvent-based post-combustion capture. Due to the high reactivity between CO2 and aqueous amine solutions, chemical absorption is suitable for capturing the CO2 at low concentration such as from the flue gas. From techno-economic analyses of the CO2 chemical absorption plant, absorber and desorber columns are the main cost of the purchased equipment. Since the process involves complex reactive separations, the accurate calculation of hydrodynamic properties, mass and energy transfer are of importance for the design of the columns. Several studies have been done on the impact of different process and property models on the equilibrium and rate-based simulation of the absorption site. However, the impact study of process and property models on the desorption site are still lacking. This paper performs rate-based simulations of CO2 absorption by Monoethanolamine. The software Aspen Plus was used for the simulations. Different mass transfer models were implemented for the mass transfer calculation in gas and liquid phases. The temperature and concentration profiles along the columns are reported and discussed.

  • 188.
    Nordlander, Eva
    et al.
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling. Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Eva, Thorin
    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, Stockholm, Sweden.
    Investigating the possibility of applying an ADM1 based model to a full-scale co-digestion plant2017Ingår i: Biochemical engineering journal, ISSN 1369-703X, E-ISSN 1873-295X, Vol. 120, s. 73-83Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This study investigated the possibility of using a model based on the anaerobic digestion model no. 1 (ADM1) on a full-scale 4000 m3 digester in order to understand how such theoretical models can be applied to a real industrial process. The industrial scale digester co-digests the organic fraction of municipal solid waste, grease trap sludge, and ley crop silage with varying feed rates and amounts of volatile solids. A year of process data was collected. Biogas flow, methane content/flow, and ammonia nitrogen were the variables that the model was best at predicting (index of agreement at 0.78, 0.61/0.77, and 0.68, respectively). The model was also used to investigate the effect of increasing the volatile solids (VS) concentration entering the digester. According to simulation results, increasing the influent VS concentration will increase biogas and methane outflow (from 1.5 million Nm3 methane to more than 2 million Nm3 methane), but decrease the amounts of biogas/methane per unit of volatile solids (from about 264 Nm3methane per tonne VS to below 215 Nm3 methane per tonne VS).

  • 189.
    Nordlander, Eva
    et al.
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Holgersson, Jenny
    Eskilstuna Energi och Miljö.
    Thorin, Eva
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Thomassen, Martin
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Yan, Jinyue
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Energy Efficiency Evaluation of two Biogas Plants2011Konferensbidrag (Refereegranskat)
    Abstract [en]

    Anaerobic digestion for biogas production is a promising renewable energy technology whichcan be used to achieve environmental goals set in the European Union and other regions. Thereare however many improvements that can still be made to the process. Furthermore, there arealternative energy conversion processes that compete for some of the substrates used inanaerobic digestion. Energy efficiency could therefore be a tool for measuring and comparingthe performance of biogas plants. This study suggests a method for calculating energyefficiency of the biogas plant so that it is comparable to other processes. Two examples ofexisting biogas plants in Sweden have been selected for the efficiency assessment by using themethod proposed in this paper. The results are compared between the plants to assess thefurther potential of improvement.

  • 190.
    Nordlander, Eva
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik.
    Yan, Jinyue
    KTH.
    Modeling of a full-scale biogas plant using a dynamic neural network2013Konferensbidrag (Refereegranskat)
  • 191.
    Nordlander, Eva
    et al.
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Olsson, Jesper
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Thorin, Eva
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Simulation of energy balance and carbon dioxide emission for microalgae introduction in wastewater treatment plants2017Ingår i: Algal Research, ISSN 2211-9264, Vol. 24, nr part A, s. 251-260Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    A case study is described in which the activated sludge process is replaced with a microalgae-activated sludge process. The effects on the heat and electricity consumption and carbon dioxide emissions were evaluated in a system model, based on mass and energy balances of biological treatment and sludge handling process steps. Data for use in the model was gathered from three wastewater treatment plants in Sweden. The evaluation showed that the introduction of microalgae could reduce electricity and heat consumption as well as CO2 emissions but would require large land areas. The study concludes that a 12-fold increase in the basin surface area would result in reductions of 26–35% in electricity consumption, 7–32% in heat consumption and 22–54% in carbon dioxide emissions. This process may be suitable for wastewater treatment plants in Nordic countries, where there is a higher organic load in summer than at other times of the year. During the summer period (May to August) electricity consumption was reduced by 50–68%, heat consumption was reduced by 13–63% and carbon dioxide emissions were reduced by 43–103%.

  • 192.
    Olsson, A.
    et al.
    Royal Institute of Technology, Stockholm.
    Campana, Pietro Elia
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Lind, M.
    ZeroMission, Stockholm.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Potential for carbon sequestration and mitigation of climate change by irrigation of grasslands2014Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 136, s. 1145-1154Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The climate change mitigation potential of irrigation powered by a photovoltaic water pumping system (PVWPS) to restore degraded grasslands has been investigated using the Intergovernmental Panel on Climate Change (IPCC) 2006 Guidelines for National Greenhouse Gas Inventories for Agriculture, Forestry and Other Land Use. The purpose of this study is to develop a generic and simple method to estimate the climate change mitigation benefit of a PVWPS. The possibility to develop carbon credits for the carbon offset markets has also been studied comparing carbon sequestration in grasslands to other carbon sequestration projects. The soil carbon sequestration following irrigation of the grassland is calculated as an annual increase in the soil organic carbon pool.The PVWPS can also generate an excess of electricity when irrigation is not needed and the emissions reductions due to substitution of grid electricity give additional climate change mitigation potential.The results from this study show that the carbon sequestration and emissions reductions benefits per land area using a PVWPS for irrigating grasslands are comparable to other carbon sequestration options such as switching to no-till practice. Soil carbon in irrigated grasslands is increased with over 60% relative to severely degraded grasslands and if nitrogen fixing species are introduced the increase in soil organic carbon can be almost 80%. Renewable electricity generation by the PVWPS will further increase the mitigation benefit of the system with 70-90%. When applying the methodology developed in this paper to a case in Qinghai, China, we conclude that using a PVWPS to restore degraded grasslands for increased grass production and desertification control has a climate change mitigation benefit of 148Mg (1Mg=1metricton) CO2-equivalents (CO2-eq) per hectare in a cold temperate, dry climate during a 20year process of soil organic carbon sequestration and emissions reductions. Leakage due to an increase in N2O emissions from the additional biomass production and introduction of nitrogen fixing species is included in this result. The most important conclusion from our case is that if soil carbon sequestration is lower than 24Mg CO2-eq per hectare including leakage, then the climate change mitigation benefit is larger if PV is used to produce electricity for the grid.

  • 193.
    Olsson, A.
    et al.
    KTH Royal Institute of Technology, Stockholm, Sweden .
    Grönkvist, S.
    KTH Royal Institute of Technology, Stockholm, Sweden .
    Lind, Mårten
    ZeroMission, Stockholm, Sweden.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    The elephant in the room - A comparative study of uncertainties in carbon offsets2016Ingår i: Environmental Science and Policy, ISSN 1462-9011, E-ISSN 1873-6416, Vol. 56, s. 32-38Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    The clean development mechanism (CDM) is a flexible mechanism under the Kyoto Protocol, which makes it possible for developed countries to offset their emissions of greenhouse gases through investing in climate change mitigation projects in developing countries. When the mitigation benefit of a CDM project is quantified, measurable uncertainties arise that can be minimised using established statistical methods. In addition, some unmeasurable uncertainties arise, such as the rebound effect of demand-side energy efficiency projects. Many project types related to land use, land-use change and forestry (LULUCF) have been excluded from the CDM in part because of the high degree of statistical uncertainty in measurements of the carbon sink and risk of non-permanence. However, recent discussions within the United Nations Framework Convention on Climate Change (UNFCCC) have opened up for the possibility of including more LULUCF activities in the future. In the light of this discussion, we highlight different aspects of uncertainties in LULUCF projects (e.g. the risk of non-permanence and the size of the carbon sink) in relation to other CDM project categories such as renewables and demand-side energy efficiency. We quantify the uncertainties, compare the magnitudes of the uncertainties in different project categories and conclude that uncertainties could be just as significant in CDM project categories such as renewables as in LULUCF projects. The CDM is a useful way of including and engaging developing countries in climate change mitigation and could be a good source of financial support for LULUCF mitigation activities. Given their enormous mitigation potential, we argue that additional LULUCF activities should be included in the CDM and other future climate policy instruments. Furthermore, we note that Nationally Appropriate Mitigation Actions (NAMAs) are currently being submitted to the UNFCCC by developing countries. Unfortunately, the under-representation of LULUCF in comparison to its potential is evident in the NAMAs submitted so far, just as it has been in the CDM. Capacity building under the CDM may influence NAMAs and there is a risk of transferring the view on uncertainties to NAMAs. 

  • 194.
    Olsson, A.
    et al.
    Royal Institute of Technology, Sweden.
    Lind, M.
    ZeroMission, Stockholm, Sweden.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    PV water pumping for carbon sequestration in dry land agriculture2014Ingår i: Energy Procedia, ISSN 1876-6102, E-ISSN 1876-6102, Vol. 61, s. 1037-1041Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper is inspired by theory related to the water-food-energy-climate nexus and suggests a novel model, suited for analysing carbon sequestration in dry land agriculture using irrigation. The model is applied specifically to photovoltaic water pumping (PVWP) systems for irrigation of grasslands in China. We argue against the narrow approaches to analysing the water issue often found in literature and propose that carbon sequestration, energy security, food security together with local moisture recycling patterns should be included within the system boundary in order to make analyses of dry land agricultural activities more relevant and accurate.

  • 195.
    Olsson, Alexander
    et al.
    KTH Royal Inst Technology, Stockholm, Sweden.
    Campana, Pietro Elia
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    Lind, Marten
    ZeroMission, Stockholm, Sweden.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi.
    PV water pumping for carbon sequestration in dry land agriculture2015Ingår i: Energy Conversion and Management, ISSN 0196-8904, E-ISSN 1879-2227, Vol. 102, s. 169-179Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    This paper suggests a novel model for analysing carbon sequestration activities in dry land agriculture considering the water-food-energy-climate nexus. The paper is based on our on-going studies on photovoltaic water pumping (PVWP) systems for irrigation of grasslands in China. Two carbon sequestration projects are analysed in terms of their water productivity and carbon sequestration potential. It is concluded that the economic water productivity, i.e. how much water that is needed to produce an amount of grass, of grassland restoration is low and that there is a need to include several of the other co-benefits to justify the use of water for climate change mitigation. The co-benefits are illustrated in a nexus model including (1) climate change mitigation, (2) water availability, (3) downstream water impact, (4) energy security, (5) food security and (6) moisture recycling. We argue for a broad approach when analysing water for carbon sequestration. The model includes energy security and food security together with local and global water concerns. This makes analyses of dry land carbon sequestration activities more relevant and accurate. Without the nexus approach, the co-benefits of grassland restoration tend to be diminished. 

  • 196.
    Pan, G.
    et al.
    Sun Yat-Sen University, Guangzhou, China.
    Wei, X.
    South China University of Technology, Guangzhou, China.
    Yu, C.
    Sun Yat-Sen University, Guangzhou, China.
    Lu, Y.
    Sun Yat-Sen University, Guangzhou, China.
    Li, J.
    National Supercomputer Center in Guangzhou, Guangzhou, China.
    Ding, J.
    Sun Yat-Sen University, Guangzhou, China.
    Wang, W.
    Sun Yat-Sen University, Guangzhou, China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology, Stockholm, Sweden.
    Thermal performance of a binary carbonate molten eutectic salt for high-temperature energy storage applications2020Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 262, artikel-id 114418Artikel i tidskrift (Refereegranskat)
    Abstract [en]

    Molten carbonate eutectic salts are promising thermal storage and heat transfer fluid materials in solar thermal power plant with the feature of large specific heat capacity, wide operating temperature range and little corrosive. The high-temperature properties of molten carbonates should be determined accurately over the entire operating temperature for energy system design. In this paper, molecular dynamic simulation is used to study temperature and component dependence of microstructures and thermophysical properties of the binary carbonate molten salt. Negative linear temperature dependence of densities and thermal conductivities of binary mixtures of different components is confirmed with respect to the distances of ion clusters. Besides, positive linear temperature dependence of self-diffusion coefficient is also obtained. When temperature is constant, densities and thermal conductivities of binary mixtures are linearly related with components. Self-diffusion coefficients of CO32− firstly increase and then decrease with increasing mole fraction of Na2CO3. The temperature-thermophysical properties-composition correlation formulas are obtained, and the database of thermophysical properties of molten carbonate salts over the entire operating temperature is complemented, which will provide the essential data for heat transfer and storage system design, operation, and optimization in CSP.

  • 197.
    Paz, Ana
    et al.
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Starfelt, Fredrik
    Dahlquist, Erik
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Thorin, Eva
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    Yan, Jinyue
    Mälardalens högskola, Akademin för hållbar samhälls- och teknikutveckling.
    How to achieve a fossil fuel free Malardalen region2007Ingår i: Conference proceedings of 3rd IGEC-2007,, 2007Konferensbidrag (Refereegranskat)
  • 198.
    Peng, J.
    et al.
    Hunan University, Changsha, Hunan, China.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology, Stockholm, Sweden.
    Zhai, Z.
    University of Colorado at Boulder, Boulder, United States.
    Markides, C. N.
    Imperial College London, London, United Kingdom.
    Lee, E. S.
    Lawrence Berkeley National Laboratory, Berkeley,United States.
    Eicker, U.
    Stuttgart University of Applied Sciences, Stuttgart, German.
    Zhao, X.
    University of Hull, Hull, United Kingdom.
    Kuhn, T. E.
    Fraunhofer Institute for Solar Energy Systems ISE, Freiburg, Germany.
    Sengupta, M.
    National Renewable Energy Laboratory, Golden, United States.
    Taylor, R. A.
    University of New South Wales, Sydney, Australia.
    Solar energy integration in buildings2020Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 264, artikel-id 114740Artikel i tidskrift (Refereegranskat)
  • 199.
    Roskilly, A. P.
    et al.
    Newcastle University, United Kingdom.
    Palacin, R.
    Newcastle University, United Kingdom.
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology (KTH), Sweden.
    Novel technologies and strategies for clean transport systems2015Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 157, s. 563-566Artikel i tidskrift (Övrigt vetenskapligt)
  • 200.
    Roskilly, A. P.
    et al.
    Sir Joseph Swan Centre for Energy Research, Newcastle University, United Kingdom .
    Taylor, P. C.
    Institute for Sustainability, Newcastle University, United Kingdom .
    Yan, Jinyue
    Mälardalens högskola, Akademin för ekonomi, samhälle och teknik, Framtidens energi. Royal Institute of Technology (KTH), Sweden .
    Energy storage systems for a low carbon future - in need of an integrated approach2015Ingår i: Applied Energy, ISSN 0306-2619, E-ISSN 1872-9118, Vol. 137, s. 463-466Artikel i tidskrift (Refereegranskat)
1234567 151 - 200 av 371
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