摘要
研究变温热源热泵的有限时间热力学性能，导出内可逆卡诺热泵和布雷顿热泵的最佳供热率和供热系数关系，并对这两种热泵循环的最优性能进行了比较。理论分析表明，在相同的边界条件和供热系数下，布雷顿循环的供热率可以高于卡诺循环供热率，在极限情况下前者是后者的两倍。对于变温热源条件，布雷顿循环主要受益于其工质与热源间有较佳的匹配。所得结果对热泵工作参数和工质的最优选择有一定指导意义。
The finite time thermodynamic performance of steady flow Carnot and Brayton heat pump cycles with finite reservoiers is studied. The fundamental optimal relations between heating load and COP of the cycles are obtained. A comparison of the performance characteristics of the two cycles is performed. Theoretical analysis shows that the optimal heating load of the Brayton cycle is larger than that of the Carnot cycle under the same specified boundary conditions and COP. The former is twice of the latter in the limit case. The Brayton cycle benifits from the matching between working fluids and the variable temperature heat reservoirs. The results given in this paper provides a guide for practicing engineers for selecting working parameters and working gas. [WT5HZ〗
出处
《电站系统工程》
1996年第5期1-5,共5页
Power System Engineering
关键词
有限时间热力学
卡诺热泵
布雷顿热泵
finite time thermodynamics \ Carnot heat pump \ Brayton heat pump \ optimization \ variable temperature reservoirspp
