某地铁列车空调制冷系统的仿真与优化

我国的地铁建设正处于高速发展期，但目前典型地铁列车空调制冷系统的能效比只有2.2～2.3，远低于同类工况下住宅空调制冷系统的能效水平。针对此问题，先建立了某地铁空调制冷系统模型，仿真与系统测试结果吻合良好。然后通过详细的仿真分析，改进蒸发器和冷凝器的制冷剂流路设计、采用小排量高能效比压缩机等方法，使得系统在冷量和成本基本不变的情况下能效比提升了21.7%。最后，研究了制冷剂R410A替代R407C的系统性能变化，系统能效比可进一步提升11.3%，达到3以上。该研究方法及结果对于设计高效节能的地铁列车空调制冷系统具有参考价值。

Modeling and Optimization of a Refrigeration System for Metro Train Air-conditioning

Though metro in China today is booming, the typical refrigeration system for metro train air-conditioning is at quite lower energy efficiency level (COP = 2.2-2.3) in comparison with the residential systems under the same operating conditions. A refrigeration system model was developed to predict the metro train air-conditioning system performance. The predictions agreed well with the experimental data. Based on comprehensive modeling and analysis, the refrigerant circuitries of condenser and evaporator were optimized and smaller capacity compressor of higher COP was adopted. Consequently, the optimized system COP increased 21.7% at almost the same cooling capacity and cost. At last, the refrigerant R407C was replaced by R410A and the system were accordingly redesigned, which brought additional 11.3% COP increase and achieved 3. The present method and results could be valuable for designing high performance air-conditioning system of the metro train.