| Title | The research on heat pump performance which use the tail water of middle-deep geothermal heating |
|---|---|
| Authors | Ruifang Ma, Ya Fan, Zhezhe Wang, Gaokai Che, Xuyi Zhang, Binbin Qiao, Xiang Cheng |
| Year | 2023 |
| Conference | World Geothermal Congress |
| Keywords | middle-deep geothermal; heat pump performance; geothermal heating; COP |
| Abstract | In order to improve the COP of middle-deep geothermal heating system, the research was conducted to analysis the performance and COP of the heat pumps which use the geothermal tail water (10℃~40℃) after the cascade utilization of the middle-deep geothermal heating system as the heat source. The results show that:The COP of the high-temperature heat pump when the heat source inlet water temperature is 38℃ is increased by more than 40% compared with that of the ordinary heat pump when the heat source inlet water temperature is 18℃；Comparing the system COP of three different equipment configuration schemes of ordinary heat pump, high temperature heat pump + ordinary heat pump, two-stage high temperature heat pump + ordinary heat pump, it is concluded that the energy efficiency of the two-stage high temperature heat pump + ordinary heat pump is 20% higher than that of the ordinary heat pump system. The results may provide optimization recommendations for engineering design. |