冷水大温差在空调系统中的应用

Application analysis of large temperature difference of chilled water in air conditioning systems

通过分析冷水机组、空调末端表冷器、冷水泵等在不同进出水温度及温差下的特性,结合案例,计算了末端表冷器为空调机组或风机盘管,冷水机组出水温度分别为5、6、7℃,温差分别为5、6、7、8℃时,空调系统总输入功率。建议根据项目规模、投资、空调水系统输送半径、建筑高度、冷源形式等优化配置制冷系统,经过技术经济比较后选择合适的冷水供回水温度和温差。

By analysing the characteristics of water chillers,air conditioning terminal surface coolers and chilled water pumps under different inlet and outlet water temperatures and temperature differences,combined with a case,calculates the total input power of air conditioning system when the terminal surface coolers are air conditioning units or fan-coil units,the outlet water temperatures of water chillers are 5℃,6℃and 7℃,and the temperature-differences are 5℃,6℃,7℃and 8℃.Suggests that the refrigeration system should be optimized according to the project scale,investment,transmission radius of air conditioning water system,building height,cold source form,etc.,and the appropriate temperature and temperature difference of chilled water supply and return water should be selected after technical and economic comparison.