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

本研究的目的是：(I)为目前所涉及的各种热能转换系统中具有重要技术价值的几种新工质提供一组可靠的热力学性质数据，以及(Ii)根据实验获得的性质数据建立状态方程和相关的热力学关联式。整个研究项目取得的主要结果概括如下：(1)使用磁密度计和可变体积金属波纹管耦合进行了卤代烃R114和R152a及其二元混合物饱和液体密度的精确测量。关于这一性质的现有信息非常有限，因为它在精确测量方面的困难可以通过本研究解决。(2)发展了一种新的测量液体等压比热容的技术，并建立了一种精确的Se…根据微扰理论建立了一个广义的状态方程，用于预测几种重要的卤代烃的热力学性质。(4)建立了二元混合制冷剂R_(22)+R_(114)体系的热力学状态方程，揭示了其基本热力学性质与组成的关系。(5)建立了适用于预测16种卤代烃热力学性质的通用程序已经根据现有但数量有限的观测性能数据确定了不同的制冷剂。对与这16种制冷剂相关的蒸汽压缩热泵系统的性能也进行了一些理论分析。我们似乎可以得出这样的结论：我们在这一热力学领域成功地积累了新的知识，这将成为进一步深入研究的又一起点。较少

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