低温热源喷射式冷电联产系统经济性分析  

Economic Analysis on Ejector Cold-Power Cogeneration System with Low-temperature Heat Sources

作　　者：张新铭[1] 丁崇安[1] 洪光[1] 游飞[1] 

机构地区：[1]重庆大学动力工程学院,低品位能源利用技术及系统教育部重点实验室,重庆400030

出　　处：《动力工程学报》2013年第4期309-315,共7页Journal of Chinese Society of Power Engineering

基　　金：国家重点基础研究发展计划(973)基金资助项目(2011CB710701)

摘　　要：建立了低温热源喷射式冷电联产系统热力学模型,提出以换热器的总面积与输出有效能之比值Rap以及膨胀机入口比体积与输出有效能之比值Rvp为目标函数,对系统的经济性进行了分析,并对所选5种有机工质进行比较筛选.结果表明:在电冷比r=0.5的情况下,存在最佳冷凝温度tc=30℃左右和最佳制冷蒸发温度te=8℃左右,且有机工质R600为最优工作工质;低温热源喷射式冷电联产系统适宜电冷比较低的场合.A thermodynamic model was established for the low-temperature heat-source ejector cold-power cogeneration system, based on which the system economy was analyzed by taking the ratio Rap of total heat-exchanger area to available output and the ratio Rvp of expander inlet specific volume to available out put as the target functions, and by selecting five organics as the working fluid. Results show that for a power-cold ratio r=0.5, there exists an optimal condensation temperature to=30 ℃ and an optimal refrig eration evaporation temperature te =8 ℃, when R600 is the optimum working fluid. The low-temperature heat-source ejector cold-power cogeneration system applies to occasions where the power-cold ratio is relatively low.

关 键 词：冷电联产系统 有机物朗肯循环 喷射式制冷 经济性 

分 类 号：TK115[动力工程及工程热物理—热能工程]