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中文摘要：
为了探索比定压热容具有良好精度的统一的理论预测模型,把比定压热容看成导出热力性质,采用余函数法,分别基于通用性好、精确度高的Peng-Robinson状态方程（P-R）和改进型的M-H方程（M-H81）推导了比定压热容的计算公式并编写了程序。对于M-H81方程,比定压热容数值的获得需基于最佳化的方程常数,在广泛的温度范围内算得了10种制冷剂的M-H81方程各常数。针对具体的制冷剂研究对象,利用该比定压热容的推算理论就可以进行推算和进一步的验证了。
英文摘要：
To search a uniform theoretical model with high precision for estimating isobaric heat capacity,based on Peng-Robinson equation of state（P-R） and modified M-H equation of state（M-H81） which are both general and with high precision,the calculation equations to estimate isobaric heat capacity of real fluid were deduced by using residual function method,and general programs were written respectively.Aiming at 10 refrigerants,corresponding constants appearing in M-H81 equation of state known in advance for obtaining the values of isobaric heat capacity were calculated in a broad temperature range.For target refrigerants,estimation of isobaric heat capacity and furthermore validation can be done by employing this theoretical method.
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