Study on Energy Efficiency Characteristics of Ground Source Heat Pump with Coupled Evaporative Condensers in Different Regions

Geothermal resources are a type of green energy, primarily utilized in buildings for cooling and heating through heat pump systems. However, heat pump systems all face the challenges of high operating energy consumption and cost. In this study, in order to solve the problem of the high total energy consumption of compressors and pumps in traditional ground source heat pump systems, a new ground source heat pump system with coupled evaporative condensers (EC-GSHP) is proposed, and a calculation model was built to compare and analyze its comprehensive performance compared with a traditional ground source heat pump in different climate environments. It was concluded that in a region with balanced cooling and heating loads, the energy consumption was reduced by 48.48 kW, the cooling energy saving coefficient (CESC) was 21.09%, and the comprehensive coefficient of performance (COP) increased by 1.31. In a region where the total cooling load was greater than the total heating load, the energy consumption was reduced by 105.19 kW, the CESC was 22.98%, and the comprehensive COP increased by 1.49. In a region where the total heating load was greater than the total cooling load, the energy consumption was reduced by 47.77 kW, the CESC was 21.41%, and the comprehensive COP increased by 1.30. It can be seen that the cooling and energy saving performance of the EC-GSHP system is significantly better than that of a traditional GSHP.