基于长期现场实测的地铁车站水冷直接制冷式空调系统与传统空调系统性能对比分析
Performance comparison analysis between water-cooled direct refrigeration air conditioning system and traditional air conditioning system in subway stations based on long-term field measurement
摘要：
目前水冷直接制冷式空调系统在国内地铁车站的应用逐渐增多，并有取代传统水冷空调系统的趋势。针对水冷直接制冷式空调系统，过去的研究普遍聚焦在理论分析或实验室分析，缺乏实际应用情况的实测分析与对比。本文通过对采用水冷直接制冷式空调系统和常规水冷空调系统的典型车站进行长期测试，分析了2种空调方案在实际地铁车站运行的性能差异，以及影响水冷直接制冷式空调系统性能的关键因素。研究发现，水冷直接制冷式空调系统方案的实际运行效果优于传统水冷空调系统方案，但是白天/夜间工况存在明显差异。同时冷水机组负载率提升和冷却水回水温度下降对水冷直接制冷式空调系统影响更大。根据测试结果，对未来地铁车站的空调系统方案设计提供了针对性建议。
Abstract：
At present, the application of water-cooled direct refrigeration air conditioning systems to domestic subway stations is gradually increasing, and there is a trend to replace the conventional water-cooled air conditioning system. For water-cooled direct refrigeration air conditioning systems, past researches have generally focused on theoretical analysis or laboratory analysis, lacking actual measurement analysis and comparison of actual application conditions. This paper analyses the performance differences between the two air conditioning schemes and the key factors affecting the performance of the water-cooled direct refrigeration air conditioning system through long-term testing of typical stations with water-cooled direct refrigeration air conditioning systems and conventional water-cooled air conditioning systems. It is found that the actual operating effect of the water-cooled direct refrigeration air conditioning system is better than that of the conventional water-cooled air conditioning system, but there is a significant difference in operating conditions between daytime and nighttime. At the same time, the two important factors affecting the performance of the chiller are the increase in the load rate and the decrease in the cooling water return temperature, which are more beneficial to the water-cooled direct refrigeration air conditioning system. According to the test results, the targeted suggestions are provided for the design of the air conditioning system in future subway stations.
Keywords:subwaystation;water-cooleddirectrefrigerationairconditioningsystem;performancetesting;performancecomparisonanalysis;energyefficiency