| Title |
A Study on Development of a Ground-Source Heat Pump System Utilizing Cast-in-place Concrete Pile Foundation of a Building |
| Authors |
황석호(SuckHo Hwang) ; 남유진(Yujin Nam) |
| Keywords |
지열히트펌프 시스템 ; 현장타설형 기초말뚝 ; 지중열교환기 Ground-source heat pump ; Cast-in-place concrete pile foundation ; Ground heat exchanger |
| Abstract |
Ground-source(Geothermal) heat pump(GSHP) systems can achieve a higher coefficient of performance than conventional air-source heat pump(ASHP) systems. However, GSHP systems are not widespread because of their expensive installation costs. The authors have developed a GSHP system that employs the cast-in-place concrete pile foundations of a building as heat exchangers in order to reduce the initial cost. In this system, eight U-tubes are arranged around the surface of a cast-in-place concrete pile foundation. The heat exchange capability of this system, subterranean temperature changes and heat pump performance were investigated in a full-scale experiment. As a result, the average values for heat rejection were 186～201 W/m(per pile, 25 W/m per pair of tubes) while cooling. The average COP of this system was 4.6 while cooling; rendering this system more effective in energy saving terms than the typical ASHP systems. |