| Title |
Geothermal Heat Pump System that Controls Ground Loop Flow Rate and EWT Using Ground Loop Buffer Tank and Inverter Pump |
| Authors |
Jong Gab Park ; Sean Hay Kim ; Jeong Soo Shin |
| DOI |
https://doi.org/10.6110/KJACR.2023.35.8.412 |
| Keywords |
열원 입구온도 제어; 유량 제어; 지열 히트펌프 시스템; 열원 버퍼탱크; 열원 순환펌프 EWT control; Flow rate control; Geothermal heat pump system; Ground loop buffer tank; Ground loop pump |
| Abstract |
A new geothermal heat pump system that could control ground loop flow rate was developed by installing a variable volume ground loop pump. It could manage ground loop water temperature by installing a ground loop buffer tank to maintain water temperature within a fixed range by promoting turbulence crossflow. This new system could minimize peak loads when resuming operations after a pause. It could increase the system's cooling and heating efficiency by lowering the EWT during cooling and raising the EWT during heating. This new system consumes 15.8% less electricity than the base system for cooling and increases the cooling system's COP by an average of 21.7%. Additionally, it consumes 8.4% less electricity than the base system for heating and increases the heating system's COP by an average of 14.5%. |