换热器传热能力对有机朗肯循环性能的影响分析  

Effects of the heat transfer capacity of heat exchangers on the performance of organic Rankine cycle

作　　者：卜宪标[1,2,3] 刘茜 李华山[1,2,3] 王汉治[1,2,3,4] 王令宝 BU Xianbiao;LIU Xi;LI Huashan;WANG Hanzhi;WANG Lingbao(Guangzhou Institute of Energy Conversion,Chinese Academy of Sciences,Guangzhou 510640,China;Key Laboratory of Renewable Energy,Chinese Academy of Sciences,Guangzhou 510640,China;Guangdong Provincial Key Laboratory of New and Renewable Energy Research and Development,Guangzhou 510640,China;University of Chinese Academy of Sciences,Beijing 100049,China)

机构地区：[1]中国科学院广州能源研究所,广东广州510640 [2]中国科学院可再生能源重点实验室,广东广州510640 [3]广东省新能源和可再生能源研究开发与应用重点实验室,广东广州510640 [4]中国科学院大学,北京100049

出　　处：《哈尔滨工程大学学报》2018年第8期1302-1307,共6页Journal of Harbin Engineering University

基　　金：国家高技术研究发展计划(2012AA053003);广东省自然科学基金项目(2016A030313174);中国科学院可再生能源重点实验室基金项目(Y607j11001);广州市科技计划项目(201607010106);中国科学院青年创新促进会资助项目(2017402)

摘　　要：为了提高低温有机朗肯循环的技术经济性,基于热力学第一和第二定律,建立了系统数学模型,以R1233zd(E)作为循环工质,在蒸发器热负荷恒定和系统净输出功最大的两种约束工况下,分析了蒸发器和冷凝器的传热能力对有机朗肯循环系统的影响。结果表明:适当提高蒸发器和冷凝器的传热能力均能提升有机朗肯循环系统的热力性能;相对而言,蒸发器传热能力的影响更为显著,当蒸发器与冷凝器的传热能力增大2倍时,系统热效率分别升高了约168%和60%。此外,存在最佳的蒸发器和冷凝器传热能力使有机朗肯循环系统的比初始总投资最小。To improve the technical economy of the organic Rankine cycle(ORC)system,a mathematic model for the subcritical ORC driven by low-temperature heat sources was built based on the first and second laws of thermodynamics.With R1233zd(E)as the cycle fluid,the influences of the heat transfer capacity of the evaporator and condenser on the ORC system were analyzed separately under two constraint conditions,i.e.,constant heat duty of evaporator and maximum net power output of system.The results show that a suitable increase of the heat transfer capacities of the evaporator and condenser can improve the ORC system thermodynamic performance;however,the heat transfer capacity of the evaporator has a greater influence.When the heat transfer capacities of the evaporator and condenser doubled,the thermal efficiency increased by 168%and 60%,respectively.Furthermore,at the optimum heat transfer capacities,the minimum initial total investment cost of the ORC system was realized.

关 键 词：有机朗肯循环 R1233zd(E) 低温热源 蒸发器 冷凝器 传热能力 热力性能 技术经济性 

分 类 号：TK123[动力工程及工程热物理—工程热物理]