CO_2跨临界热泵循环与朗肯循环耦合系统性能分析  

Analysis of the Performance of a Transcritical CO_2 Heat Pump Cycle and Rankine Cycle Coupled System

作　　者：王洪利[1] 田景瑞[1] 刘慧琴[1] 邓闯[1] 

机构地区：[1]河北联合大学,河北唐山063009

出　　处：《热能动力工程》2012年第6期660-663,735,共4页Journal of Engineering for Thermal Energy and Power

基　　金：河北省高等学校科学技术研究重点基金资助项目(ZD2010105)

摘　　要：提出跨临界CO2热泵和朗肯循环耦合实现凝汽器余热回收的方式。分别对郎肯循环、再热循环及跨临界CO2热泵和朗肯循环的耦合循环进行了热力学分析,分析表明:随着主蒸汽温度增加或乏汽温度降低,3种循环的效率均增加,朗肯循环平均效率为31.5%,耦合循环平均效率为35.5%,再热循环平均效率为33.5%;随着主蒸汽压力增加或乏汽压力降低,3种循环的效率均呈增加趋势。相同对比条件下,耦合循环效率最高,朗肯循环效率最低,再热循环介于二者之间。Proposed was a method for realizing a waste heat recovery from a condenser in a transcritical CO2 heat pump coupled with a Rankine cycle and thermodynamically analyzed were a Rankine cycle,reheat cycle and a coupled cycle of a transcritical CO2 heat pump Rankine cycle.The analytic results show that with an increase of the main steam temperature or a decrease of the exhaust gas temperature,the efficiencies of three types of cycles will increase.The average efficiency of the Rankine cycle reaches 31.5%,that of coupled cycle hits 35.5% and that of the reheat cycle is 33.5%.With an increase of the main steam temperature or a decrease of the exhaust gas temperature,the efficiencies of the three types of cycles assume an ascending tendency.Under the same contrast conditions,the efficiency of the coupled cycle is highest while that of the Rankine cycle is lowest and that of the reheat cycle is between them.

关 键 词：跨临界CO2热泵 朗肯循环 再热循环 耦合循环 热力学 

分 类 号：TK123[动力工程及工程热物理—工程热物理]