Heat Capacities of Refrigerant Mixture under High Pressure

使用热交换器来获得热容量比是由Burnett（1905）首先提出的。1930年，沃克曼用这种方法报告了气体的热容。我们开发了一种基于热交换器方法的新设计装置，用于测量高压下制冷剂混合物的热容量。为了验证该装置的可靠性，在温度范围298 ~ 343 K，压力高达1.6 MPa的情况下，测量了二氧化碳的比热容。将所得的二氧化碳热容比与文献值进行了比较。所得数据与文献中测量的估计不确定度值一致。不幸的是，在较高压力下的测量出现了一些问题。其中一个问题是热交换器的压力泄漏，这是该装置中最重要的部分。因此，这里不能报道氢氟碳化合物混合物的结果。这些问题已经解决了。将尽快测量氢氟碳化合物混合物中缺失的数据。

The use of a heat exchanger for obtaining heat capacity ratios was first proposed by Burnett(1905). In 1930 Workman reported the heat capacity of gases by this method. We have developed newly designed apparatus based on the heat exchanger method for the measurement of heat capacities of refrigerant mixtures under high pressure. In order to confirm the reliability of our apparatus, the specific heat capacities of carbon dioxide were measured in the temperature range of 298 to 343 K at pressures up to 1.6 MPa. The heat capacity ratios of carbon dioxide obtained in this work were compared with the literature values. The data obtained agreed with the literature values in the estimated uncertainties of this measurements. Unfortunately, some problems occurred with the measurement at higher pressures. One problem is the pressure leak at the heat exchanger which is the most important part in this apparatus. Therefore, no results for the mixture of Hydrofluoro carbons can be reported here. These problems were already solved. The missing data for the mixtures of Hydrofluoro carbons will be measured as soon as possible.