R1234yf微通道平行流冷凝器仿真模型

Simulation Model for Micro-channel Parallel Flow Condenser using R1234yf as Working Fluid

建立了使用R1234yf制冷剂的微通道平行流冷凝器分布参数模型,采用-NTU法对单元体的换热量进行计算。对四种不同的两相流冷凝传热关联式进行比较,同时对冷凝器模型进行实验验证。结果表明,Cavallini等人的两相流冷凝传热关联式应用于R1234yf冷凝器模型可以获得最好的仿真精度,在不同工况下换热量的仿真结果与实验结果的平均误差仅为2.9%,为R1234yf微通道平行流冷凝器的设计及优化提供了理论依据。

A distributed parameter model for the micro-channel parallel flow condenser using R1234yf as working fluid was developed, and theε-NTU method was used to calculate the heat transfer rate. Four two phase flow condensing heat transfer correlations were compared and the model was verified by tests. The results shown that the model using Cavallini’s correlation has the highest precision, and the calculated mean deviation is 2.9%. The model is an effective analytical method for the micro-channel parallel flow condenser development.