空调大温差研究（4）：空调冷水大温差系统经济分析

对空调冷水大温差系统的经济性进行了分析。结果表明：当冷水机组冷水初温等于或大于7℃时，10℃温差与5℃温差时冷水机组的能耗基本相同，而发器压降明显减小；冷水系统采用10℃温差较℃温差冷水量减少一半，水泵能减少，水系统一次投资减少；即使空调机组一次投资略有增加，空调水系统的一次投资可减少5％左右。空调水系统运行 费用减少30％左右。建议在应用空调大温差技术的同时使用大温差专用空调机组。

Research of large temperature difference in air conditioning (4): an economical analysis of the system with a large temperature difference between supply and return water

Analyses the large temperature difference chi lled water systems. Results show that when outlet water temperature of the chi ller is equal or over 7℃, for 10℃ and 5℃ temperature differences, the energy consumption of the chiller are nearly equal, the loss of head of evaporator reduces obviously; and the chilled water quantity reduces by half, the energy consumption of water pumps cuts down, the initial investment i s lower when using 10℃ temperature difference than 5℃. Even if the initial investment in air conditioning units increases a little, the initia l investment of the air conditioning water system reduces about 5 percent and th e operation cost reduces about 30 percent. Proposes that when using large temper ature difference technology the special air conditioning unit with large tempera ture difference should be used accordingly.