摘要
目的 为降低建筑能耗,选取实际空调系统工程的开式冷却塔进行实测和改造优化分析,对冷却塔进行节能潜力分析。方法 对某大厦空调系统的冷却塔进行全年运行工况测试,通过实测数据分析判断其换热效率与风水比,进一步分析冷却塔运行效果较差的具体原因,提出改造优化方案。结果 既有冷却塔换热效率在55%~59%之间,风水比远远低于最优值1.0~1.5。比较而言,换装高效节能防堵塞的螺旋形喷嘴,加高冷却塔屏障结构及更新并增加塔内填料更适合解决实际问题。结论 冷却塔周边条件和运行维护对性能具有重要影响。进风口被墙体阻隔时,进风温度高,换热效果差。经过计算可知,冷却塔经过加装变频器之后每年可节省9 212万kW·h的电量。
In order to reduce building energy consumption, the energy-saving potential for the cooling tower is analyzed by actual measurement and optimization analysis.The annual operation conditions for the cooling tower of the air conditioning system in a building is tested.Through the analysis of annual operation data, the heat exchange efficiency and air-water ratio are judged, and the reasons for the poor effect of the cooling tower are further analyzed to put forward the retrofitting optimization scheme.The results show that the location and operation maintenance of the cooling tower have an important impact on the performance.The air inlet is blocked by the wall, the air inlet temperature is high, the heat exchange effect is poor, the heat exchange efficiency is between 55%~59% and the air water ratio is far lower than the optimal value of 1.0~1.5.In comparison, replacing the high-efficiency spiral nozzle, energy-saving and anti-blocking and heightening the enclosure structure can solve the practical problems.According to the calculation, the cooling tower can further save 9 212 kW/h of power every year after installing frequency converter.
作者
黄凯良
郝禹翔
冯国会
王贵强
李旭林
HUANG Kailiang;HAO Yuxiang;FENG Guohui;WANG Guiqiang;LI Xulin(School of Municipal and Environmental Engineering,Shenyang Jianzhu University,Shenyang,China,110168)
出处
《沈阳建筑大学学报（自然科学版）》
CAS
北大核心
2023年第1期155-161,共7页
Journal of Shenyang Jianzhu University：Natural Science
基金
国家自然科学基金重点项目(52038009)
辽宁省教育厅高等学校创新人才支持计划项目(2020389)
沈阳市科学技术计划项目(21-108-9-03)。
关键词
空调系统
冷却塔
性能测试
改造分析
变频
air conditioning system
cooling tower
performance test
transformation analysis
frequency conversion
