不同工质有机朗肯-蒸汽压缩复合式热泵系统的能效特性比较

Comparison Study of Energy Ratio of ORC Compound With Vapor Compression Heat Pump System Using Different Working Fluid

摘要: 对有机朗肯-蒸汽压缩复合式热泵系统的循环原理进行了描述,建立了系统性能的计算模型.其系统优势在于结构紧凑,能小型化,这使得采用太阳能驱动的家用小型空调成为可能;且性能系数相对较高,吸收式的制冷系数(coefficient of performance,COP)小于0.7,而有机朗肯-蒸汽压缩复合式热泵系统的制冷COP理论上高于1.4,且在室外温度越高时系数越高;能实现机械能、冷量的切换输出,在制冷工况和制热工况下,对有机朗肯循环和热泵循环采用相同工质和不同工质的循环性能进行了比较计算,筛选出了复合系统最适宜的工质,为进一步设计有机朗肯-蒸汽压缩式热泵系统提供理论指导,使此复合式热泵系统的应用成为可能.

Abstract: The working characteristic of organic Rankin cycle(ORC) compound with vapor compression heat pump system was described in this paper,and the calculation method was established.The working performance under both cooling and heating condition was researched using different working fluid,and the suitable working fluid was obtained.This work can offer the theoretical direction for designing the ORC compound with vapor compression heat pump system.