| Title |
Empirical Results and Operational Cost Analysis of Geothermal Heat Pump System using Thermal Energy Storage in Cooling Season |
| Authors |
Deukwon Kim ; Dongwon Lee ; Jaehyeok Heo ; Minhwi Kim |
| DOI |
https://doi.org/10.6110/KJACR.2018.30.4.167 |
| Keywords |
축열조 ; 지열원 히트펌프 ; 심야전력 ; 전력부하 평준화 Thermal energy storage ; Geothermal heat pump ; Midnight power ; Power load leveling |
| Abstract |
The geothermal heat pump systems were installed for heating and cooling of public buildings in Jincheon Eco-friendly Energy town. The heat pump system was operated at night to save on operational costs, and the cold heat was stored in thermal energy storage (TES). In this study, the performance of geothermal heat pump systems with the TES during the summer season was analyzed, and the operational costs with and without the TES were compared. The electric chiller model was used to simulate a heat pump applied without the TES system. Electric rates of each system were measured to calculate operational costs. When the TES is used in the air conditioning system, the electric load (30.4 MWh) calculated in the daytime can move to off-peak load time, and the operational cost is reduced by 36~54%. |