家用空气源热泵热水器微通道冷凝器仿真研究

Simulation of Microchannel Condenser for Household Air Source Heat Pump Water Heater

为提升家用空气源热泵热水器水箱外微通道冷凝器的性能,建立了家用空气源热泵热水器水箱外微通道冷凝器的准稳态模型,实验验证结果显示模型误差能控制在±9%以内。依据模型对微通道冷凝器的换热量、换热系数、压降等性能进行仿真研究。结果发现,微通道冷凝器为四流程时能够减小压降并保证换热量满足需要;关键参数微通道截面的最佳尺寸在1.6~2.6 mm^(2)系统性能最优,同时扁管内微通道数应控制在16~24根。研究结果为家用空气源热泵热水器微通道冷凝器的设计提供借鉴。

To improve the performance of the micro-channel condenser outside the tank of domestic air source heat pump water heater,a quasi-steady state model of the household air source heat pump water heater with microchannel condenser was established.The experimental results show that the model error can be controlled within±9%.The heat transfer,heat transfer coefficient,and pressure drop of the microchannel condenser were simulated by the model.Results show that when the microchannel condenser has four processes,the pressure drop can be reduced while the heat transfer is guaranteed.The optimal size of microchannel cross section,a key parameter,is between 1.6 and 2.6 mm^(2).The system performance is optimal,and the number of microchannels in the flat tube should be controlled within 16-24.The research results provide reference for the design of micro-channel condenser of household air source heat pump water heater.