基于長期現場實測的地鐵車站水冷直接制冷式空調系統與傳統空調系統性能對比分析
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調系統在國內地鐵車站的應用逐漸增多，并有取代傳統水冷空調系統的趨勢。針對水冷直接制冷式空調系統，過去的研究普遍聚焦在理論分析或實驗室分析，缺乏實際應用情況的實測分析與對比。本文通過對采用水冷直接制冷式空調系統和常規水冷空調系統的典型車站進行長期測試，分析了2種空調方案在實際地鐵車站運行的性能差異，以及影響水冷直接制冷式空調系統性能的關鍵因素。研究發現，水冷直接制冷式空調系統方案的實際運行效果優于傳統水冷空調系統方案，但是白天/夜間工況存在明顯差異。同時冷水機組負載率提升和冷卻水回水溫度下降對水冷直接制冷式空調系統影響更大。根據測試結果，對未來地鐵車站的空調系統方案設計提供了針對性建議。
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