江水源热泵系统动态取水温差控制策略研究

摘要

江水水温对江水源热泵系统的设计和运行具有重要影响.通过对嘉陵江水温的连续测试,探究了江水水温的变化规律,发现江水全年温度变化较大,在系统设计和运行中应充分考虑江水的温度变化特性.结合水温实测数据,研究提出了动态取水温差控制策略.以某水源热泵工程为例,对比分析了两种运行控制方式,发现采用动态取水温差控制策略较采用固定取水温差控制策略具有在水温条件不利时保证系统能满足建筑的负荷需求,在水温条件有利时减少系统运行能耗的特点.%The water-intake temperature is a key factor affecting the design and operation of river water source heat pump systems. In order to master the dynamic characteristics of river water temperature, the temperature of Jialing river was tested. Result shows that water temperature changes dramaticly with time. The dynanmic water-intake temperature difference control strategy was proposed with the water temperature data. A case study shows that the dynamic water-intake temperature difference control strategy does better in matching the cold/heat supplied by the heat pump and the cooling/heating load of the building than the fixed water-intake temperature difference control strategy.