R134a的热物理性质计算

氯氟碳化合物（ＣＦＣ）作为制冷与空调设备的工质，长期以来被广泛应用于生产和生活的各个部门。近年来，人们逐步认识到某些ＣＦＣ对臭氧层具有破坏作用和挥发后产生温室效应，因此不得不寻求新的替代工质。替代Ｒ１２的制冷剂方案中，有单一工质，也有混合工质。在单一工质中，从长远意义上最有希望替代Ｒ１２的新工质是民１３４ａ。为了对制冷系统应用Ｒ１３４ａ进行性能评价，而要一套完整的热物理性质公式。目前，有关Ｒ１３４ａ的热力学性质数据较多，但有关它的热物理性质数据却很少。本文列出并推导了Ｒ１３４ａ热物理性质的计算方程式，给出了部分计算数据，为用Ｒ１３４ａ作为制冷剂循环的制冷装置及换热器计算机辅助设计打下基础。

The Calculation of Thermophysical Properties of R_134a

The present hypothesis of depletion of the stratospheric ozone layer by some chlorofluorocarbons (CFC),a kind of working mediums commonly used in refrigeration and air-conditioning has prompted a lot of research and development of newstratospherically safe fluids. In some particular cases of unitary working medium,R134a,the most commonly used and hopeful refrigerant,has been considered to be subitituted for R12. A complete set of equations for thermo-physical properties will be required for the equipment design and R134a. manufacturing. In this paper, the experimental studies both at home and abroad on R134a have been synthesized to deduce a set of equations for calculating the thermophysical properties.