摘要
同井回灌地下水源热泵抽水和回灌在含水层同一径向位置不同深度处同时发生,增加了热贯通的可能性,其热力特性分析尤为重要.文章首次建立了单一介质承压含水层中定流量同井回灌地下水源热泵冬季运行地下水换热数学模型,并针对典型的细沙含水层进行了数值求解.经过一个冬季的制热运行,抽水平均温度降低了3.6℃.由于对流和热弥散的存在,同井回灌地下水源热泵热影响范围达到了74 m.因此对于地下水初始温度在13℃以上的地区,同井回灌地下水源热泵是适宜的,较大的热影响范围也使得单口抽灌同井具有承担大负荷的能力.
Pumping and injection of a groundwater heat pump with pumping and recharging in the same well （GWIIPPRSW） occurs simultaneously at the same plane spot but at different depth of aquifer, which increases the probability of thermal breakthrough. Thus, it is highly important to analyze its thermal characteristics. A model was first established for groundwater heat transfer in a unitary homogenous confined aquifer by the operation of GWHPPRSW in winter with constant heat pump flow. Based on the model, a numerical simulation was done for a typical fine sand confined aquifer. It was found that the mean pumping temperature was reduced 3.6 ℃within a whole winter. The thermal effective radius （TER） of GWHPPRSW is far to 74 m because of convection and thermal dispersion. Therefore, GWHPPRSW is feasible to the region where the initial temperature of groundwater is higher than 13 ℃. Also, a larger TER makes a pumping and recharging well have a large capacity load.
出处
《哈尔滨工程大学学报》
EI
CAS
CSCD
北大核心
2006年第2期195-199,222,共6页
Journal of Harbin Engineering University
关键词
地下水源热泵
同井回灌
热力特性
抽水平均温度
热影响范围
groundwater heat pump
pumping and recharging well
thermal characteristic
mean pumping tem- perature
thermal effective radius （TER）
