水源热泵井施工中水文地质参数确定的探讨——以东煤沈阳钻探机械研制中心厂房水源热泵井施工为例

以单井抽水试验资料为基础,计算出该区的新近系砂砾岩含水层的出水量为40m^3/h。为解决水源热泵系统的热源及同层回灌问题,进行了较长时间的带有观测孔的抽水试验及回灌试验。试验表明：该区的渗透系数为32.16m/d,影响半径为166m,回灌渗透系数为14.38m/d,回灌影响半径为61m。据此计算干扰井单井抽水量为38.51m^3/h,干扰井单井回水量为11.14m^3/h,同时确定该区的抽灌井比例为1∶4。根据用水需求,该区设计抽水两口,回灌井8口,备用一口回灌井,形成该区的水源热泵系统。系统运行近两年来,单井出水量、回灌量及水位降深均符合设计要求,达到了预期效果。

A Discussion on Hydrogeological Computing Issues in Water Source Heat Pump System Construction——To Take Workshop Water Source Heat Pump System Construction of Shenyang Drilling Machinery Development Center,Northeast China Coal as an Example

Based on single well pumping test data, estimated out Neogene System sandy conglomerate aquifer water yield is 40m^3/h in the area. In order to settle the issues of heat source of water source heat pump system and same strata recharging, carried out rather long time pumping test and recharging test with observation holes. The tests have worked out that, the area＇s permeability coefficient is 32.16m/d, radius of influence 166m, recharging permeability coefficient 14.38m/d and recharging radius of influence 61m. On these grounds, estimated interfering well pump discharge per well per hour is 38.51m^3/h, interfering well recharge per well per hour 11.14m^3/h, ratio of discharge well/recharge well should bel：4. According to water requirement, the area has designed two discharging wells, 8 recharging wells and 1 recharging well standby, that is the area＇s water source heat pump system. Since the operation of the system about 2 years, discharge and recharge per well per hour, water table drawdown are all accord with design requirements, and desired result achieved.