冷却塔式复合地源热泵系统控制方法探讨

在夏热冬冷地区,传统式单独运行的地埋管式地源热泵在夏季对土壤的蓄热量大于在冬季的取热量,常年运行会造成土壤热失衡及热泵机组运行效率降低的情况。冷却塔式复合地源热泵系统可利用冷却塔辅助散热,通过分析其组成结构、工作原理和分类特点,确认控制温差和调节冷却塔运行时间等方法可改善热泵运行的工作效率,保持地埋管附近土壤的热平衡,同时在降低热泵机组初投资、运行维护费用,以及减少占地面积等方面优势明显。

Control Strategy of Composite Ground-coupled Heat Pump with a Cooling Tower

The annual operation of the traditional ground source heat pump system where the soil heat storage in summer is larger than the heat taking in winter will cause the soil heat imbalance and efficiency reduction. By using the composite ground-coupled heat pump with a cooling tower, and analyzing the pump’s structure, operational principle and classification, control strategies including controlling the range of temperature and cooling tower working mode will improve the work efficiency and soil thermal imbalance. The composite ground-coupled heat pump with a cooling tower can also reduce theinitial investment, operation cost and area of the system.