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.
出处
《动力工程学报》
CAS
CSCD
北大核心
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)
关键词
冷电联产系统
有机物朗肯循环
喷射式制冷
经济性
cold-power cogeneration system
organic Rankine cycle
ejector refrigeration
economy
