混合工质内置热泵有机朗肯循环冷热电联供系统性能研究  

Performance Research of Combined Cooling Heat and Power-Organic Rankine Cycle System Installed With Heat Pump Using Mixtures

作　　者：李子申[1] 李惟毅[1] 徐博睿 贾向东 姜健 

机构地区：[1]中低温热能高效利用教育部重点实验室(天津大学),天津市南开区300072 [2]北京源深节能技术有限责任公司,北京市海淀区100142 [3]山东省特种设备检验研究院,山东省济南市250101

出　　处：《中国电机工程学报》2015年第19期4972-4980,共9页Proceedings of the CSEE

摘　　要：提出了一种使用非共沸混合工质的内置热泵的有机朗肯循环冷、热、电联供系统。与前人提出的纯工质系统不同,该系统将工质的冷凝过程分为高温段和低温段。在高温冷凝器后,将气、液两态的工质分离,使接下来的2种流程中的工质浓度产生差异。在热、电联供和冷、热、电联供2种运行模式下,分别计算不同引射系数时该系统(使用混合工质R245fa/R134a,75:25)和纯工质系统(分别使用R245fa和R134a)的发电效率、性能系数、憥效率、经济热效率和制冷热效率,并将2种系统进行对比。混合工质系统在2种运行模式下的性能系数分别达到了1.35和1.39,明显高于纯工质系统。A combined cooling heat and power-organic Rankine cycle （CCHP-ORC） system installed with a heat pump using zeotropic mixtures was presented. Unlike the system using pure working fluids previousy proposed, the condensation process was divided into high and low temperatures in this system. The separation of gas and liquid working fluids made the concentration of working fluids different in two kinds of following process. In combined heating and power（CHP） or combined cooling heating and power（CCHP） modes, the power generation efficiency, coefficient of performance（COP）, exergy efficiency, economic thermal efficiency and refrigeration efficiency of different ejector coefficients were calculated and the system using mixture R245fa/R134a （75：25） was compared with system using pure working fluids R245fa or R134a. In two modes, the coefficient of performance of the system reach 1.35 and 1.39 respectively, higher than the system previously proposed obviously.

关 键 词：有机朗肯循环 热泵 热电冷联供 性能系数 憥效率 

分 类 号：TK123[动力工程及工程热物理—工程热物理]