大量测试数据表明，现行地铁环控系统中，冷机大部分时间处于部分负荷状态下，因此用于评判地铁站冷水机组部分负荷综合性能的IPLV值的计算方法值得研究。使用了一种逐时计算地铁车站负荷的方法，计算得出北京市、上海市、广州市典型地铁标准站全年的逐时负荷曲线。根据全年逐时负荷曲线统计了三个城市地铁车站不同负荷率区间占比情况，从而得出地铁车站水冷空调机组IPLV的计算办法，计算结果显示，地铁站空调季部分负荷情况占比很高，低于25%负荷率的情况占空调季运行时间的接近1/3，低于50%负荷率占比超过运行时间的50%。考虑到地铁车站通常设立两台冷水机组的情况，对使用两台机组的情况进行了讨论，使用两台冷机的情况下，低于25%负荷率的情况变为15%，但是还是高于团体标准值1.5%；50%以上负荷率区间从40%增加到77%，与团体标准值接近。研究结果对于地铁空调系统设备选型和运行节能具有一定的指导价值。

Chillers in the current subway environment control system are under partial load most of the time from a large amount of test data. This paper aims to revise the formula of the integrated part load value (IPLV) used to judge the comprehensive performance of the subway station chiller under partial load. This paper used a method of calculating the load of subway stations hourly throughout the year to obtain the hourly load curve in Beijing, shanghai and Guangzhou. Load rate sections in three cities were counted from the load duration curve. The result shows that partial load accounts for a high proportion in subway station air-conditioning season. The load rate below 25% accounts for nearly 1/3 of operating time, and the load rate below 50% accounts for more than 50%. Under the condition of setting up 2 chillers, the proportion of low load rate decreases, but is still higher than the group standard value. The result is instructive for subway air-conditioning system equipment selection and energy saving.

U231.1

“十三五”国家重点研发计划课题:公共交通枢纽建筑节能关键技术与示范项目(2018YFC0705006)