Research on the Water System Characteristic of Water Source Side of Deep Well Water Source Heat Pump System
During heating period in winter,to resolve the problems about injection and intake well design,injection and groundwater change situation of deep well water source heat pump system, 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. Compared with flow rate 70m3/h and 100m3/h, the total injection flow rate of injection well at 40m3/h was 86 400m3, increased 9120m3 and 21 600m3 respectively.To meet 130m3/h 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 0.5℃ at heating period.When return water temperature of deep well reduced, COP value of heat pump unit declined gradually. When return water temperature of deep well was 7℃,COP value of heat pump unit at 50％ capacity was only 2.47. So, return water temperature of deep well should not be lower than 7℃ so that heat pump unit could run efficiently. In the whole heating period, changes scope of COP value of heat pump was 3.13-3.56.
Water source heat pump Intake well Injection water lever Groundwater temperature Flow quantity
Fu Y Z Zhang X Cai Y L
School of Mechanical Engineering,Shanghai University of Engineering Science,Shanghai 201620,P.R.Chin HVAC & Gas Institute,Tongji University,Shanghai 200092,P.R.China
国际会议
上海
英文
964-968
2008-04-05（万方平台首次上网日期，不代表论文的发表时间）