深浅井蓄热型水源热泵系统性能分析

Characteristics Analysis on Water Source Heat Pumps Combined with Deep and Shallow Wells

基于对地下水资源进一步深度利用和节能的目的,结合具体工程设计实例对深浅井蓄热型水源热泵系统以及多台水源热泵机组井水侧串联、井水多级提取利用的系统方案进行应用性研究。该形式通过采用“冬灌夏用”、“夏灌冬用”的蓄热方式充分利用了热泵产生的冷量和热量,同时从广义来讲这种非同期的同层回灌可在一个循环周期内(1a)保证原水源层的水量和水温,并有效控制地面沉降问题；此外机组井水侧多级串联将常规地下水利用温差由8～15℃提高到30℃以上,增加了地下水资源利用率,减少了打井数量；最后探讨了井水侧串联时各级机组的水温控制和级数的确定。

The characteristics of water source heat pumps combined with deep and shallow wells, in which well side heat pumps were connected in series, were investigated through design example ,for the purpose of father utilization of groundwater source. Its virtues such as energy storage and exchange between the two wells, using heat resource adequately, requiring wells as fewer as possible, and avoiding earth subsidence were discussed, and the conclusion that WSHPs in series can enhance well utilize temperature difference from 7-10℃ to 30℃ and then save more energy compared with WSHPs alone in the same water inlet and outlet temperature was put forward. At last, the method of water temperature control and numbers of stages in series were suggested.