INFLUENCE OF BACKFILL IN BOREHOLE HEAT EXCHANGER FOR A GROUND COUPLED HEAT PUMP
The objective of this paper is to study the effect of backfill thermal conductivity on vertical ground heat exchanger performance. A numerical model for the simulation of transient heat transfer in vertical ground heat exchanger is presented. The influence of backfill on borehole heat exchanger is investigated. It can be concluded that the utilization of large diameter borehole heat exchanger with thermally enhanced backfill offer better system performance and the backfill thermal conductivity should be selected according to the local soil thermal properties rather than some certain value.
Ground-coupled heat pump Borehole heat exchanger Backfill
Qiang Bao Qi-Hong Deng Su-yu Luo Run-zhuo Niu
School of Energy Science and Engineering, Central South University, Changsha, Hunan 410083, China
国际会议
北京
英文
2007-09-07（万方平台首次上网日期，不代表论文的发表时间）