| Title |
Performance Analysis for Open-loop Geothermal System with Spill-way technology by Real-scale Experiment |
| Authors |
Hong kyo Kim ; Sangmu Bae ; Yujin Nam ; Oun Jeoun ; Jong Hyun Oh ; Byong Ho Lee |
| DOI |
http://dx.doi.org/10.6110/KJACR.2018.30.4.186 |
| Keywords |
페어링 기술 ; 복수 지열정 ; 수주 지열정 ; 실증 실험 Pairing technology ; Two-well ; Standing Column Well ; Real-scale experiment |
| Abstract |
A ground-source heat pump system (GSHP) is more energy efficient than other heat-source systems because it uses annual constant underground and water temperatures. Especially, two-well geothermal systems using groundwater as the heat source can achieve higher performance than closed-loop geothermal systems. However, performance of two-well geothermal systems is decreased by occurring overflow according to scale during long-term operations. Therefore, this study presents a two-well pairing geothermal system that controls the groundwater level of a diffusion well. In addition, a two-well pairing geothermal system and an SCW geothermal system were installed, and a comparative analysis of cooling performance depending on system operation under the same load conditions was conducted. The result was that the average heat pump coefficient of performance (COP) of the two-well pairing system was 6.5, and the entire system COP was 4.3. |