摘要
据统计,约40%的建筑能耗为空调系统能耗,空调系统能耗中大约有60%能耗来自制冷机房。由此可知,制冷机房节能是建筑节能的关键。目前,对制冷机房中冷冻侧大温差的节能技术有了大量的研究和实际应用。但是,对于冷却侧大温差的节能研究仍有待发展。目前设计师大多采用32/37℃的冷却水进出水温进行制冷系统的设计。为了给设计师提供冷却侧大温差的设计参考,通过能耗模拟软件对采用冷却侧大温差设计的制冷机房进行能耗预测,并根据模拟结果得到制冷机房最优的大温差设计方案。结果表明:当冷却侧温差由5℃增加至7℃时,冷却水进出水温为32/39℃的节能率(8%~9%)比31/38℃的节能率(约3%)更高。将制冷机房的冷却侧温差加大至8、9、10℃时,杭州、北京、广州均为8℃温差(冷却水进出水温为32/40℃)时最节能;而昆明则是10℃温差(冷却水进出水温为28/38℃)时最节能。
According to the statistics,there is about 40%of building energy consumption is from Heating,Ventilation and Air Conditioning(HVAC)system.In addition,the cooling plant consists of about 60%of HVAC energy consumption.Therefore,energy saving of the cooling plant is critical to building energy conservation.There has been many researches and applications of large chilled water temperature difference.However,the researches of large cooling water temperature difference are required to be developed.The 32/37℃cooling water temperature are adopt by most HVAC engineers to design a system.In order to provide a reference for HVAC engineers to conduct a large cooling water temperature design,energy simulation was used to calculate the cooling plant energy consumption with large cooling water temperature.The optimized design alternative was obtained by comparing the simulation results.The results show that the energy saving percentage of 32/39℃cooling water temperature(8%~9%)is higher than that of 31/38℃(about 3%)when the cooling water temperature difference is increased from 5℃to 7℃.In comparison to 9℃and 10℃cooling water temperature difference,there is most energy saved by increasing the temperature difference to 8℃(cooling water temperature of 32/40℃)in Hangzhou,Beijing and Guangzhou.However,the highest energy saving percentage in Kunming is under 10℃cooling water temperature difference(cooling water temperature of 28/38℃).
作者
徐晓燕
王颖
刘冰韵
Xu Xiaoyan;Wang Ying;Liu Bingyun(Tongji Architectural Design(Group)Co.,Ltd,Shanghai,200092;Tongji University,Shanghai,200092)
出处
《制冷与空调（四川）》
2020年第4期422-427,共6页
Refrigeration and Air Conditioning
关键词
冷却侧大温差
制冷机房
节能优化
暖通设计
能耗模拟
large cooling water temperature difference
cooling plants
energy conservation optimization
HVAC design
energy simulation
