水源热泵系统水源特性研究

Research on Water Source System Characteristic of Water Source Heat Pump System

采用实验的方法，研究了深井水源热泵系统抽水井和回灌井个数优化配置和回灌井回灌情况以及地下水温度变化对热泵机组性能的影响等问题。通过研究得出：为满足热泵机组的需水量和回灌量，该工程设计两个回灌井和一个取水井，整个采暖期深井供水温度非常稳定，只下降了0.7℃，深井回水温度并没有影响深井供水温度。而在热泵机组停止运行后，地下水温度在30天就从8℃-11.3℃。当深井回水温度低于7℃时，热泵机组COP值很低，供热效果不佳，所以应采用增加深井供水量，使热泵机组更高效运行。另外，整个采暖期热泵机组COP值变化范围为3.13-3.56。

The experimental method was employed to study optimization quantity matching intake well with injection well, injection situation during the heating period and groundwater temperature change effect on performance of heat pump. At last, some important conclusions were drawn about groundwater system. To meet the system maximum injection and pumping of the request, two injection wells and one intake well were adopted in the project. Supply water temperature of deep well was very stable and had decreased only 0.7℃ at heating period. After heat pump stop running, groundwater temperature increased quickly from 8℃ to 11.3℃ in the 30 days. If local return water temperature of deep well was lower than 7℃, the COP of heat pump was low and heating efficiency was not high. So the system must adopt others methods （ such as increasing water flow） in order to heat pump unit could run efficiently. In the whole heating period, changes sCOPe of COP value of heat pump was 3.13 -3.56.