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。
The performance of an air-standard rectangular cycle with heat transfer loss and variable specific heats was analyzed using a finite-time thermodynamics approach.The relations between work output and compression ratio,efficiency and compression ratio,work output and cycle efficiency were derived from detailed numerical calculations.Moreover,the effects of heat transfer loss and variable specific heats on the cycle performance were analyzed.The results show that the effects of heat transfer loss and variable specific heats on the cycle performance are obvious.The results may provide some guidelines for the applications of the rectangular cycle.