工质变比热和传热损失对内可逆矩形循环性能的影响?

The effects of heat transfer loss and variable specific heats of working fluid on the performance of an endoreversible rectangular cycle

中文关键词: 有限时间热力学，矩形循环，变比热工质, 性能分析

英文关键词: finite-time thermodynamics, rectangular cycle, working fluid with variable specific heats, performance analysis.

中文摘要:

      用有限时间热力学理论和方法分析空气标准矩形循环，由数值计算给出了存在传热损失和工质变比热时循环功与压缩比、效率与压缩比以及功和效率的特性关系，并分析了传热损失和工质变比热对循环性能的影响特点，通过分析可知传热和变比热特性对矩形循环性能有较大影响，所得结果对该循环的应用具有一定的理论指导意义。

英文摘要:

      The performance of an air-standard rectangular cycle with heat transfer loss and variable specific heats of working fluid is analyzed by using finite-time thermodynamics. The relations between the work output and the compression ratio, between the efficiency and the compression ratio, and the optimal relation between work output and the efficiency of the cycle are derived by detailed numerical examples. Moreover, the effects of heat transfer loss and variable specific heats of working fluid on the cycle performance are analyzed. The results show that the effects of heat transfer loss and variable specific heats of working fluid on the cycle performance are obvious. The results may provide some guidelines for the application of the rectangular cycle.