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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.
The cycle principle of the organic Rankine - Vapor Compression compound heat pump system is described, and the calculation model of the system performance is established.The system advantages are that the structure is compact and can be miniaturized, which makes it possible to use solar powered small home air conditioners; The coefficient of performance (COP) of the absorption is less than 0.7, while the COP of the organic Rankine-Vapor Compression composite heat pump system is theoretically higher than 1.4. When the outdoor temperature is higher, the coefficient is higher High; can switch the mechanical energy output, the cooling conditions and heating conditions, the organic Rankine cycle and heat pump cycle using the same working fluid and different working conditions of the cycle performance were compared and calculated out The most suitable working fluid for the composite system provides theoretical guidance for the further design of organic Rankine - vapor compression heat pump system, making the application of this composite heat pump system possible.