基于LNG冷■与燃料电池余热利用的TRCC串联系统
|
摘要
提出一种基于固体氧化物燃料电池(solid oxide fuel cell, SOFC)和跨临界二氧化碳循环(transcritical carbon dioxide cycle,TRCC)的联合发电系统,采用跨临界二氧化碳循环来回收SOFC的排气余热,同时利用了LNG冷量■。建立该系统的数学模型,分析参数变化对系统性能的影响。结果表明,在设计条件下,SOFC、TRCC和整个系统的热效率分别为64.2%、22.4%和74.1%,系统热效率随着燃料电池入口温度增加而增加,以及水蒸气碳比的增加而降低;系统热效率随着TRCC的透平入口压力的升高而升高。
A cogeneration system based on solid oxide fuel cell(SOFC for short) and transcritical carbon dioxide cycle(TRCC for short) was proposed. The transcritial carbon dioxide cycle was used to recover the exhaust heat of the SOFC while utilizing the LNG refrigeration capacity. The mathematical model of the system was established, and the influence of parameter changes on system performance was analyzed. The results showed that under the design conditions, the thermal efficiencies of SOFC, TRCC, and the whole system were 64.2%, 22.4%, and 74.1%, respectively. The system thermal efficiency increased with the inlet temperature of the fuel cell and decreased with the increase of the steam-carbon ratio. The thermal efficiency increased as the turbine inlet pressure to the TRCC increased.
A cogeneration system based on solid oxide fuel cell(SOFC for short) and transcritical carbon dioxide cycle(TRCC for short) was proposed. The transcritial carbon dioxide cycle was used to recover the exhaust heat of the SOFC while utilizing the LNG refrigeration capacity. The mathematical model of the system was established, and the influence of parameter changes on system performance was analyzed. The results showed that under the design conditions, the thermal efficiencies of SOFC, TRCC, and the whole system were 64.2%, 22.4%, and 74.1%, respectively. The system thermal efficiency increased with the inlet temperature of the fuel cell and decreased with the increase of the steam-carbon ratio. The thermal efficiency increased as the turbine inlet pressure to the TRCC increased.
引文
[1] JEONG K S,OH B S.Fuel economy and life-cycle cost analysis of a fuel cell hybrid vehicle[J].Journal of Power Sources,2002,105(1):58-65.
[2] ROKNI,MASOUD.Thermodynamic analysis of SOFC (solid oxide fuel cell):stirling hybrid plants using alternative fuels[J].Energy,2013,61:87-97.
[3] DICKS A,RAND D A J.Fuel cell systems explained[M].New York,USA:Wiley,2000.
[4] WANG Jiangfeng,YAN Zheyuan,MA Shaolin,et al.Thermodynamic analysis of an integrated power generation system driven by solid oxide fuel cell[J].International Journal of Hydrogen Energy,2012,37(3):2535-2545.
[5] ARSALIS A.Thermoeconomic modeling and parametric study of hybrid SOFC—gas turbine—steam turbine power plants ranging from 1.5 to 10 MWe[J].Journal of Power Sources,2008,181(2):313-326.
[6] AKKAYA A V,SAHIN B,ERDEM H H.An analysis of SOFC/GT CHP system based on exergetic performance criteria[J].International Journal of Hydrogen Energy,2008,33(10):2566-2577.
[7] SONG C.Fuel processing for low-temperature and high-temperature fuel cells challenges,and opportunities for sustainable development in the 21st century [J].Catalysis Today,2002,77(1):17-49.
[8] ZHANG Shiqi,LIU Haolun,LIU Meili,et al.An efficient integration strategy for a SOFC-GT-SORC combined system with performance simulation and parametric optimization[J].Applied Thermal Engineering,2017,121:314-324.
[9] RANJBAR F,CHITSAZ A,MAHMOUDI S M S,et al.Energy and exergy assessments of a novel trigeneration system based on a solid oxide fuel cell[J].Energy Conversion and Management,2014,87:318-327.
[10] SANCHEZ D,ESCALONA J M M D,CHACARTEGUI R,et al.A comparison between molten carbonate fuel cells based hybrid systems using air and supercritical carbon dioxide Brayton cycles with state of the art technology[J].Journal of Power Sources,2011,196(9):4347-4354.
[11] WALNUM H T,NEKS P,NORD L O,et al.Modelling and simulation of CO2 (carbon dioxide) bottoming cycles for offshore oil and gas installations at design and off-design conditions[J].Energy,2013,59:513-520.
[12] 郑开云.超临界二氧化碳循环热电联产系统初步研究[J].分布式能源,2017,2(3):15-19.ZHENG Kaiyun.Preliminary investigation on supercritical carbon dioxide cycle cogeneration system [J].Distributed Energy,2017,2(3):15-19.
[13] YAMAGUCHI H,ZHANG X R,FUJIMA K,et al.Solar energy powered rankine cycle using supercritical CO2[J].Applied Thermal Engineering,2006,26(17-18):2345-2354.
[14] DUAN Chengjie,WANG Jie,YANG Xiao-Yong.Features of supercritical carbon dioxide brayton cycle coupled with reactor[J].Atomic Energy Science & Technology,2010,44(11):1341-1348.
[15] CHAN S H,LOW C F,DING O L.Energy and exergy analysis of simple solid-oxide fuel-cell power systems[J].Journal of Power Sources,2002,103(2):188-200.
[16] CHAN S H,HO H K,TIAN Y.Multi-level modeling of SOFC—gas turbine hybrid system[J].International Journal of Hydrogen Energy,2003,28(8):889-900.
[17] 钟芬,吴竺,朱彤.低温余热驱动的热电复合系统优化设计[J].中国电机工程学报,2016,36(12):3176-3183.ZHONG Fen,WU Zhu,ZHU Tong.Optimization design of a combined organic rankine cycle-heat pump system driven by low-grade waste heat[J].Proceedings of the CSEE,2016,36(12):3176-3183.
[18] 冯兴强.固体氧化物燃料电池系统数学建模[D].上海:上海交通大学,2009.FENG Xingqiang.Numerical simulation Jiaotong of solid oxide fuel cell system[D].Shanghai:Shanghai Jiao Tong University,2009.
[19] 贾俊曦.固体氧化物燃料电池传热传质模型研究[D].大连:大连理工大学,2006.JIA Junxi.Study of model for heat and mass transfer in solid oxide fuel cell[D].Dalian:Dalian University of Technology,2006.
[2] ROKNI,MASOUD.Thermodynamic analysis of SOFC (solid oxide fuel cell):stirling hybrid plants using alternative fuels[J].Energy,2013,61:87-97.
[3] DICKS A,RAND D A J.Fuel cell systems explained[M].New York,USA:Wiley,2000.
[4] WANG Jiangfeng,YAN Zheyuan,MA Shaolin,et al.Thermodynamic analysis of an integrated power generation system driven by solid oxide fuel cell[J].International Journal of Hydrogen Energy,2012,37(3):2535-2545.
[5] ARSALIS A.Thermoeconomic modeling and parametric study of hybrid SOFC—gas turbine—steam turbine power plants ranging from 1.5 to 10 MWe[J].Journal of Power Sources,2008,181(2):313-326.
[6] AKKAYA A V,SAHIN B,ERDEM H H.An analysis of SOFC/GT CHP system based on exergetic performance criteria[J].International Journal of Hydrogen Energy,2008,33(10):2566-2577.
[7] SONG C.Fuel processing for low-temperature and high-temperature fuel cells challenges,and opportunities for sustainable development in the 21st century [J].Catalysis Today,2002,77(1):17-49.
[8] ZHANG Shiqi,LIU Haolun,LIU Meili,et al.An efficient integration strategy for a SOFC-GT-SORC combined system with performance simulation and parametric optimization[J].Applied Thermal Engineering,2017,121:314-324.
[9] RANJBAR F,CHITSAZ A,MAHMOUDI S M S,et al.Energy and exergy assessments of a novel trigeneration system based on a solid oxide fuel cell[J].Energy Conversion and Management,2014,87:318-327.
[10] SANCHEZ D,ESCALONA J M M D,CHACARTEGUI R,et al.A comparison between molten carbonate fuel cells based hybrid systems using air and supercritical carbon dioxide Brayton cycles with state of the art technology[J].Journal of Power Sources,2011,196(9):4347-4354.
[11] WALNUM H T,NEKS P,NORD L O,et al.Modelling and simulation of CO2 (carbon dioxide) bottoming cycles for offshore oil and gas installations at design and off-design conditions[J].Energy,2013,59:513-520.
[12] 郑开云.超临界二氧化碳循环热电联产系统初步研究[J].分布式能源,2017,2(3):15-19.ZHENG Kaiyun.Preliminary investigation on supercritical carbon dioxide cycle cogeneration system [J].Distributed Energy,2017,2(3):15-19.
[13] YAMAGUCHI H,ZHANG X R,FUJIMA K,et al.Solar energy powered rankine cycle using supercritical CO2[J].Applied Thermal Engineering,2006,26(17-18):2345-2354.
[14] DUAN Chengjie,WANG Jie,YANG Xiao-Yong.Features of supercritical carbon dioxide brayton cycle coupled with reactor[J].Atomic Energy Science & Technology,2010,44(11):1341-1348.
[15] CHAN S H,LOW C F,DING O L.Energy and exergy analysis of simple solid-oxide fuel-cell power systems[J].Journal of Power Sources,2002,103(2):188-200.
[16] CHAN S H,HO H K,TIAN Y.Multi-level modeling of SOFC—gas turbine hybrid system[J].International Journal of Hydrogen Energy,2003,28(8):889-900.
[17] 钟芬,吴竺,朱彤.低温余热驱动的热电复合系统优化设计[J].中国电机工程学报,2016,36(12):3176-3183.ZHONG Fen,WU Zhu,ZHU Tong.Optimization design of a combined organic rankine cycle-heat pump system driven by low-grade waste heat[J].Proceedings of the CSEE,2016,36(12):3176-3183.
[18] 冯兴强.固体氧化物燃料电池系统数学建模[D].上海:上海交通大学,2009.FENG Xingqiang.Numerical simulation Jiaotong of solid oxide fuel cell system[D].Shanghai:Shanghai Jiao Tong University,2009.
[19] 贾俊曦.固体氧化物燃料电池传热传质模型研究[D].大连:大连理工大学,2006.JIA Junxi.Study of model for heat and mass transfer in solid oxide fuel cell[D].Dalian:Dalian University of Technology,2006.