列车空调机组变工况动态仿真研究

Dynamic Simulation Study of Train Air-conditioning Unit on Variable Working Conditions

铁路列车用单元式空调机组的设计与房间空调器不同,必须考虑其工作条件的特殊性。采用现代产品研发过程中的计算机仿真手段对制冷工质为R410A的新型单元式空调机组进行变工况下动态模拟及性能预测,以期部分替代真实物理实验。研究结果表明:R410A制冷剂应用于列车空调系统,应注意其工作压力高、系统匹配改进等问题。仿真过程中制冷压缩机转数或者外界温度改变时,列车空调制冷系统各项热力参数及COP均变化明显,可以为机组的合理设计提供相关参考。

Abstract ： The design of train modular air-conditioning unit is different from that of room air conditioner, the special nature of their working conditions must be taken into account. In This paper, by using Computer simulation method, the new modular air-condition unit with refrigerant R410A under variable working conditions was simulated dynamically, accompanied by performance prediction, in the hope of substituting the real physical experiments. The simulation results show that when refrigerant R410A is used in train air-conditioned system, some problems such as its high work pressure, system matching and improving and so on should be paid attention to. In the process of simulation, both the thermal parameters of rain air-conditioning refrigeration system and the COP change obviously as the number of revolution changes or the external temperature changes. This study can also serve as a reference for the rational design of the unit.