冰箱用微通道冷凝器分相集总参数模型

采用微通道换热器作为冷凝器的冰箱得到快速发展，对于该类冰箱的动态特性仿真需要建立可以实现冰箱用微通道冷凝器性能快速与准确预测的模型。首先将微通道冷凝器单个流程内的所有扁管简化成一根单管，每个流程简化为一个单元，进而建立微通道冷凝器的分相集总参数模型，并基于能量收敛准则对模型进行迭代求解。开发的模型嵌入已有的冰箱动态仿真平台，模拟24 h的冰箱动态性能耗时小于3 min；计算实例显示，预测的冰箱整体能耗与实验结果误差小于9.5%。

Lumped parameter model for microchannel condenser of refrigerators

Refrigerators with microchannel condenser is widely used recently.As for the dynamic simulation of this kind of refrigerators, a fast and accurate prediction model for microchannel condenser is needed.In this paper, several flat tubes in a flow path are simplified as one tube and each flow path is simplified as an element.With the simplification, a lumped parameter model for microchannel condenser is developed and the model is solved with iterations based on energy convergence criteria.The developed model is added into existing refrigerator system simulation platform and is used to predict the performance of one type of fridge with microchannel condenser on a mainstream PC.Computation time for the 24 h dynamic simulation of a refrigerator is less than 3 min.Results of simulation instances show that error between simulation results and experiments data for refrigerator total energy consumption is less than 9.5%.