Developmnt of Generalized Predictive Procedures on Thermophysical Properties of Novel Working Fluids

本研究的目的是：(i)为目前有关的各种热能转换系统中具有重要技术意义的几种新工质提供一套可靠的热力学性质数据，以及（ii）根据实验获得的性质数据制定状态方程以及相关的热力学相关性。本研究项目取得的主要成果总结如下：(1)用磁性密度计和变体积金属波纹管对卤代烃r114和r152a及其二元混合物的饱和液体密度进行了精确测量。关于这一特性的可用信息非常有限，因为它难以精确测量，而本研究可以解决这一问题。(2)提出了一种测量液体等压比热容的新方法，得到了r114的饱和液相和压缩液相在广泛温度和压力范围内的等压比热容数据。(3)根据所谓的微扰理论，建立了一个广义的状态方程，用以预测几种重要卤化烃的不同热力学性质。(4)建立了二元制冷剂混合物r22 + r114体系的热力学状态方程，广泛揭示了其基本热力学性质的组分依赖性。(5)根据现有的但数量有限的观察到的性质数据，建立了一个预测16种不同制冷剂的可靠和系统的热力学性质的通用程序。对这16种制冷剂对蒸汽压缩热泵系统性能的影响进行了理论分析。我们似乎可以公平地得出这样的结论：我们已经成功地积累了热力学领域的新知识，这些知识将成为进一步深入研究的另一个起点。少

The present research has been performed with the objectives;(i) to provide a reliable set of thermodynamic property data for several new working fluids of technical importance in various thermal energy conversion systems currently concerned, and (ii) to formulate equations of state as well as related thermodynamic correlations on the basis of experimentally obtained property data.The principal results achieved throughout the present research project are summarized as follows;(1) The precise measurements of the saturated liquid densities for halogenated hydrocarbons, R 114 and R 152a, and their binary mixtures have been performed using a magnetic densimeter coupled with a variable-volume metallic bellows. An available information about this property was so much limited due to its difficulties in precise measurements which could be solved by the present study.(2) A novel measuring technique for measuring the isobaric specific heat capacities of liquids has been developed and a precise se … More t of measured isobaric specific heat capacity data for R 114 in its extensive range to temperatures and pressures has been obtained for saturated and compressed liquid phase of R 114.(3) A generalized equation of state has been developed based upon the so-called perturbation theory so as to predict the different thermodynamic properties of several halogenated hydrocarbons of importance.(4) A thermodynamic equation of state for the binary refrigerant mixture R 22 + R 114 systems has been developed and the composition dependence of essential thermodynamic properties has been revealed extensively.(5) A generalized procedure to predict reliable and systematic thermodynamic properties for 16 different refrigerants on the basis of available but limited quantity of observed property data has been established. Some theoretical analysis of the vapor-compression heat pump system performance associated with these 16 refrigerants has been also performed.It seems us fair to conclude that we have succeeded in accumulating new knowledge in this field of thermodynamics which would become another starting points for further advanced studies. Less