冷却水系统设计温差节能性分析
Energy saving analysis of design temperature difference in cooling water system
摘要：
从冷却水系统及冷水机组的全年运行能耗角度，分析了不同冷却水设计温差的节能性。冷却水系统全年能耗和冷水机组、系统负荷、湿球温度分布、冷却水系统设计温差有关。通过实例分析了北京、上海、广州3个地区在5、6、7、8 ℃ 4种设计温差下的冷却水系统全年能耗水平，得出在冷水机组性能允许的条件下，应尽可能加大冷却水设计温差以节能。
Abstract：
From the perspective of the annual operating energy consumption of the cooling water systems and chiller units, this paper analyses the energy saving effect of different cooling water design temperature differences. The annual energy consumption of the cooling water system is related to the chiller units, system loads, wet-bulb temperature distribution, and the design temperature difference of the cooling water system. This paper analyses the annual energy consumption level of the cooling water system under four design temperature differences of 5, 6, 7 and 8 ℃ in Beijing, Shanghai and Guangzhou by examples, and finds that if the chiller units’ performance allows, the larger the temperature difference, the more energy saving.
Keywords:cooling water system; cooling water design temperature difference; wet-bulb temperature; cooling tower characteristic; chiller unit characteristic; system coefficient of refrigeration performance; energy consumption analysis