夏热冬暖地区某大型商业综合体高效制冷空调系统运行性能实测研究
Field measurement study on operational performance of high-efficiency cooling and air conditioning systems of a large-scale commercial complex in hot summer and warm winter zone
摘要：
选取我国夏热冬暖气候分区某典型大型商业综合体为研究对象,对其高效制冷空调系统进行为期2个月的现场实测与数据分析。实验结果表明:该制冷机房系统运行能效比(EER)达到5.42,其中冷水机组综合性能系数(COP)达到6.65,水系统输送系数(WTF)均达到60以上;系统制取单位冷量的电力成本与碳排放强度分别为0.135元/(kW·h)和83.49 g/(kW·h),较传统制冷系统实现35.4%的节能率提升。测试数据表明,该系统存在以下技术缺陷:1) 冷水机组换热端差偏大;2) 水系统呈现大流量小温差运行特征;3) 水系统输送系数偏高。本研究基于上述问题,提出了针对性优化建议,为进一步提升制冷系统运行能效提供技术支撑。
Abstract：
This paper focuses on a typical large-scale commercial complex in the hot summer and warm winter zone of China as the research object,and conducts a two-month field measurement and data analysis of its high-efficiency cooling and air conditioning system.The experimental results show that the operational energy efficiency ratio (EER) of the chiller plant system reaches 5.42,with the comprehensive performance of coefficient (COP) of the chiller reaching 6.65 and the water system transport factor (WTF) all exceeding 60.The electricity cost and carbon emission intensity per unit of cooling capacity produced by the system are 0.135 yuan/kWh and 83.49 g/kWh,respectively,achieving a 35.4% energy-saving rate improvement compared with traditional refrigeration systems.The test data indicate that the system has the following technical defects: 1) The temperature difference at the ends of the chiller heat exchanger is relatively large; 2) The water system exhibits the characteristics of high flow rate and low temperature difference operation; 3) The water system transport factor is relatively high.Based on the above issues,this study proposes targeted optimization suggestions to provide technical support for further improving the operational energy efficiency of the cooling system.
Keywords:hot summer and warm winter zone; large-scale commercial complex; air conditioning system; high-efficiency chiller plant; field measurement study; performance indicator