转换温度中Berthelot物态方程内压强项温度指数的修正

设定Berthelot实际气体物态方程内压强项中待定的温度指数参数为α,根据热力学理论推导出具有温度指数参数的Berthelot实际气体转换温度与压强的函数关系式,应用计算机MATLAB模拟仿真技术绘制反转曲线,将其与气体实验反转曲线进行对比,确定两者拟合情况较好时的指数修正参数,得到修正后的Berthelot实际气体物态方程。修正后的Berthelot实际气体物态方程在描述气体通过节流手段获得低温时更贴近气体的实验行为,在节流制冷工艺流程中具有更强的使用价值和理论指导意义。

Modification of temperature exponent parameter of inner pressure term in Berthelot equation of transition temperature

In Berthelot equation of state,the temperature exponent parameter is set to α in the inner pressure term,according to the thermodynamics theory,the functional relationship between transition temperature and pressure is derived,the inversion curves are plotted in MATLAB,which are compared with the inversion curves of gas experiment to determine the better exponent correction parameter,finally,the modified Berthelot equation of state is obtained.It is much closer to the behaviors of actual gas when the temperature is low,therefore,the modified Berthelot quation of state has more use value and theoretic guiding significance.