基于LNG冷能利用的高温质子交换膜燃料电池多联供系统性能研究  

Performance study of high-temperature proton exchange membrane fuel cell multi-generation system based on LNG cold energy utilization

作　　者：荣繁华 纪少波[1] 于泽庭[1] 于秋晔 RONG Fanhua;JI Shaobo;YU Zeting;YU Qiuye(School of Energy and Power Engineering,Shandong University,Jinan 250061,China;Automotive Data of China(Tianjin)Co.,Ltd.,Tianjin 300393,China)

机构地区：[1]山东大学能源与动力工程学院,山东济南250061 [2]中汽数据(天津)有限公司,天津300393

出　　处：《热力发电》2022年第11期107-114,共8页Thermal Power Generation

基　　金：国家自然科学基金项目(62192753);中汽中心重大研发专项(ZX20220002)。

摘　　要：提出了一种基于液化天然气(LNG)冷能利用的新型多联供系统,该新系统包括高温质子交换膜燃料电池、跨临界有机朗肯循环和液化天然气冷能利用子系统。建立了多联供系统的数学模型,分析了参数变化对系统性能的影响。研究结果表明:在本研究设计工况下,高温质子交换膜燃料电池系统和跨临界有机朗肯循环系统的发电效率分别为31.51%和23.45%;新型多联供系统总能利用效率为40.75%,?效率为31.93%;多联供系统?损最大的部件为高温质子交换膜燃料电池,达到了52.8%;多联供系统总能利用效率和?效率随着高温质子交换膜燃料电池工作温度的增加而增加,随着氢气质量流量的增加和跨临界有机朗肯循环低压的增加而减少。A new multi-generation system based on liquefied natural gas(LNG) cold energy utilization is proposed,which includes high-temperature proton exchange membrane fuel cell,transcritical organic Rankine cycle and liquefied natural gas cold energy utilization subsystem.The mathematical model of the new multi-generation system is established,and the influence of parameter variation on system performance is investigated.The calculation shows that,under the design condition,the power generation efficiency of the high-temperature proton exchange membrane fuel cell system and the transcritical organic Rankine cycle system are 31.51% and 23.45%,respectively.The total energy utilization efficiency of the new multi-generation system is 40.75%,and the exergy efficiency is 31.93%.The component with the maximal exergy loss(52.8%) is the high-temperature proton exchange membrane fuel cell.The combined efficiency and the exergy efficiency of the multi-generation system increases with the working temperature of the high-temperature proton exchange membrane fuel cell,but decreases with the increase of hydrogen mass flow rate and transcritical organic Rankine cycle low pressure.

关 键 词：多联供系统 高温质子交换膜燃料电池 LNG冷能利用 跨临界有机朗肯循环 

分 类 号：TK91[动力工程及工程热物理]