基于地表水和冷却塔的复合冷却空调系统运行策略

Operation strategies of air conditioning system combining surface water and cooling towers

以地表水和冷却塔构建的复合冷却空调系统为研究对象,通过建立设备建模和系统仿真平台,对其运行控制策略进行了探讨。分析表明,不同冷源的启停主要受室外气候条件、地表水源与空调机房距离的影响。以上海地区某建筑为例,应用基于地表水源和冷却塔的复合冷却空调系统,当地表水源与空调机房距离小于154.7m时,复合冷却空调系统单独运行地表水源空调系统较为节能;当地表水源与空调机房距离大于1 237.8m时,单独运行冷却塔冷却的空调系统较为节能;当地表水源与空调机房距离在154.7~1 237.8m之间时,启停策略与室外气候相关,如室外空气温度为26℃,地表水源与空调机房距离不足773.6m时,宜运行地表水源空调系统,而当距离大于773.6m时,宜启用冷却塔冷却空调系统。

Taking an air conditioning system combining surface water and cooling towers as a study object, establishes an equipment modeling and system simulation platform and analyses the operation control strategies. The analysis indicates that the operating on-off of different cold sources are mainly influenced by outdoor climate conditions and the distance between surface water sources and machine rooms. Taking a building in Shanghai as an example, applies a composite cooling air conditioning system based on surface water source and cooling tower. When the distance between the surface water and the air conditioning machine room is less than 154.7 meters, the energy efficiency of running surface water-source air conditioning system only is higher than that of the composite cooling air conditioning system. When the distance is longer than 1 237.8 meters, the air conditioning system using cooling tower is more energy efficient. While the distance is between 154.7 meters and 1 237.8 meters, the on-off strategy is related to the outdoor climate. For example, when the outdoor air temperature is 26 ~C and the distance is less than 773.6 meters, it is appropriate to use the surface water-source air conditioning system, while the air conditioning system with cooling tower should be used when the distance exceeds 773.6 meters.