摘要
包含一个可调参数的Peng-Robinson状态方程可准确计算混合致冷剂的饱和压力及气液平衡,但对液相容积的计算误差稍大。本文针对非共沸混合工质R22/R114和R13B1/R152a进行了计算,同时也计算了两种共沸工质R500和R502,并与实验数据作了比较,获得了较满意的结果。
This paper applies Peng-Robinson equation of state to the calculation of the thermodynamic properties and vapour-liquid equilibrium of refrigerant mixtures with a focus on non-azeotropic refrigerant mixtures R22/R114 and R13B1/R152a, azeotropic refrigerant mixtures RS00 andR502 because of their wide application. It shows that PR equation of state can be used to predict the bubble-point pressures and the vapour-liquid equilibrium as well as the liquid volumes of azeotropic refrigerant mixtures. For non-azeotropic refrigerant mixtures, e, g. R22/R114, the deviation for liquid volumes is a bit larger, but it still can meet the demands of engineering application in general. The results, compared with expermental data, are highly satisfactory.
关键词
PR状态方程
热力性质
致冷剂
计算
PR equation of State
Mixture
Thermodynamic property
Vapour-liquid equilibrium
