由张春路（通讯作者）、袁晗、曹祥撰写的论文New insight into regenerated air heat pump cycle在Energy, 2015年第91卷在线发表。论文在回热型空气压缩循环的理论研究中，提出了当量温度比和膨胀机当量等熵效率两个新变量，从而在数学形式上统一了回热型空气压缩循环与基本空气压缩循环。换言之，使得基本空气压缩循环的理论方法可以直接用于回热型空气压缩循环，极大地简化了回热型空气压缩循环的理论模型方法。并以此为基础，在理论上证明了回热型空气压缩循环同样具备我们之前在基本空气压缩循环上发现的一些重要特点(http://greatlab.tongji.edu.cn/pages/news/news_20140711.html)。此外，还证明了回热型空气压缩循环在极端条件下会比基本空气压缩循环的效率更低。本文研究方法及结论对于重新认识回热型空气压缩循环具有重要意义。

论文链接：http://www.sciencedirect.com/science/article/pii/S0360544215011275

免费下载链接：http://authors.elsevier.com/a/1RgFn1H~czt8-B(有效期至2015年10月28日)

论文摘要：

Regenerated air (reverse Brayton) cycle has unique potentials in heat pump applications compared to conventional vapor-compression cycles. To better understand the regenerated air heat pump cycle characteristics, a thermodynamic model with new equivalent parameters was developed in this paper. Equivalent temperature ratio and equivalent isentropic efficiency of expander were introduced to represent the effect of regenerator, which made the regenerated air cycle in the same mathematical expressions as the basic air cycle and created an easy way to prove some important features that regenerated air cycle inherits from the basic one. Moreover, we proved in theory that the regenerator does not always improve the air cycle efficiency. Larger temperature ratio and lower effectiveness of regenerator could make the regenerated air cycle even worse than the basic air cycle. Lastly, we found that only under certain conditions the cycle could get remarkable benefits from a well-sized regenerator. These results would enable further study of the regenerated air cycle from a different perspective.