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根据两相流动的均相流假设 ,建立了绝热毛细管分布参数的稳态数学模型 ,结合制冷工质HFC 134a基于MH状态方程的热力学性质计算模型 ,采用新的基团贡献法计算粘度 ,用熵增判据考虑壅塞流动的影响 ,对绝热毛细管流量进行数值模拟计算。对理论计算结果与相关文献的实验数据进行了比较。针对以HFC 134a为工质的制冷系统 ,编制了一套较为实用的绝热毛细管流量计算软件
According to the homogeneous flow assumption of two-phase flow, a steady-state mathematical model of adiabatic capillary distribution parameters was established. Based on the calculation model of thermodynamic properties of refrigerant HFC 134a based on MH equation of state, a new group contribution method was used to calculate the viscosity. According to the influence of congestion flow, the flow rate of adiabatic capillary tube was calculated by numerical simulation. The theoretical calculation results are compared with the experimental data of relevant literature. Aiming at the refrigeration system with HFC 134a as working fluid, a set of more practical thermal insulation capillary flow calculation software