北京平原区浅层地下水热泵系统承载能力评价

Energy load capacity evaluation for shallow groundwater heat pumps in Beijing Plain

鉴于目前地下水热泵系统应用的无序性,为了科学合理地评价含水层对热泵系统的能量承载力,采用地下热传递数值法、能量均衡法和热量储存法评价了北京平原区单位面积含水层利用地下水热泵系统可承载的能量负荷。评价结果表明:数值法评价以保证热泵系统的运行效率为前提,客观反映了地下水抽灌行为,能够充分发挥热泵系统节能环保的优点,优于均衡法和热储法;热泵系统承载能力与含水层的厚度呈显著的正相关;山前地区含水层易于回灌,但热泵系统的承载力较小,而东南平原区承载力较大,但难以回灌。

In view of the out-of-order application of groundwater heat pumps,it is necessary to evaluate the energy load capacity in aquifer. A numerical method of underground heat transport,an energy equilibrium method and a thermal reservoir method were used to calculate the energy capacity of shallow aquifer per square kilometer. The evaluation result shows that the numerical method is better than the energy equilibrium method and the thermal reservoir method because it reflects the behavior of groundwater pump and...