微通道冷凝器在城市轨道交通车辆变频热泵空调上的应用

在城市轨道交通车辆变频热泵空调机组翅片管冷凝器的基础上,对微通道冷凝器的应用进行了研究。结果表明:采用微通道冷凝器,机组制冷剂充注量降低27.27%;同压缩机频率下,机组制冷量和能效比分别上升1.12%和5.73%,制热量和能效比分别下降20.46%和5.85%;微通道冷凝器结霜快而均匀,多次结、除霜后换热器边角处有积霜现象。

Application of Micro-channel Condenser on Heat Pump Air-conditioning Unit for Rail Transit Vehicle

Based on the VF heat pump air conditioner of urban rail transit vehicle with finned tube condenser,the application of micro-channel condenser is investigated.The result shows that the micro-channel condenser system could reduce the refrigerant charge of air conditioner system by 27.27％ compared with the finned tube condenser.With the same compressor frequency,the capacity and EER (energy efficiency ratio) of air conditioner are increased by 1.12％ and 5.73％,while its heat and COP (coefficient of performance) are decreased by 20.46％ 和 5.85％ respectively.The micro-channel condenser could frost quickly and evenly,but the frost will deposit at the corners after several cycling times.