垂直埋管地源热泵系统的后期检测与研究

Late Detection and Research of Vertical Borehole Ground Source Heat Pump System

对已投入运行1年以上的广西某大学垂直埋管地源热泵系统进行检测与研究。检测结果表明:随着系统垂直布局于地埋集管两侧的地能井数增加,平均每米井深换热量减少;系统在制冷工况与制热工况下每米井深的换热量进行比较相差较大;螺杆式热泵机组通过土壤源垂直埋管系统释热,其能效比明显优于通过冷却塔释热的能效比,而且环境温度越高越明显。

In this paper, focus on a vertical buried ground source heat pump system which have been used more than one year at a university in Guangxi for testing and research. The test results showed that in this system： increasing the rows of vertical buried wells which connect to the horizontal buried pipes, the per meter depth heat exchange is reduced; the per meter depth heat exchange is quite different between cooling eondition and heating condition in this system; in this screw heat pump units system, calculating the system COP, use ground source as the heat exchanger is more efficient than cooling tower, and the higher the temperature the more obvious.