上海地铁某基地风冷热泵空调系统能耗分析

Energy Consumption Analysis of Air-cooled Heat Pump in a Vehicle Base of Shanghai Metro

对上海地铁某基地综合楼风冷热泵空调系统作能耗调研。调查结果显示制冷季空调能耗约占全年能耗的48%~57%,供热季的能耗约占全年能耗的33%~44%,过渡季能耗约占全年能耗的7%~11%。综合楼空调能耗远高于上海市同类建筑平均水平。造成综合楼空调能耗巨大的原因主要有四点,分别是空调使用时间不合理、空调机组选型搭配不合理、房间功能属性变化大、水泵工作点不理想。运行阶段综合楼空调最大负荷仅为设计负荷的72%,单台机组全年运行负荷保持在35%~82%。为降低综合楼空调能耗,对原有空调系统提出节能改造建议。通过计算发现采用多联机系统,单位面积建筑空调年耗电量为40.85 kW·h/(m^2·a),相比2018年降低44%,且低于上海市综合建筑平均空调耗电水平。

The energy consumption of a complex building with air-cooled heat pump in a vehicle base of Shanghai Metro is studied.Research results show that the air conditioning energy consumption in cooling season and heating season and transition season accounts for 48%~57%,33%~44%,7%~11%of the annual energy consumption,respectively.Air conditioning energy consumption of the complex building is much higher than the average level of similar buildings in Shanghai.There are four main reasons for the huge energy consumption of air conditioning in the complex building,which are unreasonable use time of air-conditioning,unreasonable selection and matching of air-conditioning units,great changes in room function attributes,and unsatisfactory working point of pumps.In the operation stage,the maximum air conditioning load of the complex building is only 72%of the design load,and the annual operating load of a single unit is maintained at 35%~82%.In order to reduce the energy consumption of air conditioning in the complex building,the energy saving reconstruction suggestions for the original air conditioning system are proposed.It is found that the annual power consumption per unit area of building air conditioning is40.85 kW·h/(m^2·a),which is 44%lower than that in 2018,and lower than the average power consumption level of similar buildings in Shanghai.