Simulation Study On Ground Heat Transfer Characteristic Of Single Well

Different well cycling system has its characteristic of recharge problem in many areas, suffers with consequences land subsidence, ground fissure and so on. Different well cycling system digging too many wells, certainly it will gives rise to problems of large space occupation, inconvenience management and high cost. If we can deal with heat transfixion,we can promote it power application in engineering.This article mainly researches on single well cycling GSHP, in this paper, the author classifies single well cycling system according to its traits, analyzes various factors that influence its operation, and finally picks out one factor--underground heat well structure, using Fluent software to research on heat transfixion phenomenon of single well cycling GSHP. This paper includes the following content: types of single heat source well cycling, influences of caliper and partition location on heat transfixion. Finally, this article comes to the following conclusion:(1)According to whether underground water flows directly through water-source heat pump units, we can classifies single well cycling GSHP into single well cycling directly groundwater heat exchange system and single well cycling indirectly underground water heat exchange system.(2) Major factor influencing system performance of single well cycling GSHP is water quality、 power consumption of well pump、Water temperature、intermediate heat exchanger and the structure design quality of heat source well.(3) Within 200 seconds in actual physical operation, the variation temperature of pump in standing column well is 6.71 k, while pumping & recharging well is 5.57 k,gravel-backfull pumping & recharging well is 6.09 K. It’s obvious that the heat transfixion of standing column is the most serious, pumping & recharging is second and gravel-backfull pumping & recharging is the best.(4) Within 200 seconds in actual physical operation, in the earlier stage, the smaller the caliper of standing column well, the more remarkable performance in heat transfixion, as time goes by, the larger the caliper of standing column well, the more remarkable performance in heat transfixion. The same applies in gravel-backfull pumping & recharging well. While in pumping & recharging well, the larger thecaliper of standing column well, the more remarkable performance in heat transfixion.(5) Within 200 seconds in actual physical operation, the more shallow of plate location in pumping & recharging well, the more remarkable performance in heat transfixion. The same applies in gravel-backfull pumping & recharging well.