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http://dx.doi.org/10.6110/KJACR.2018.30.4.167

Empirical Results and Operational Cost Analysis of Geothermal Heat Pump System using Thermal Energy Storage in Cooling Season  

Kim, Deukwon (Korea Institute of Energy Research)
Lee, Dongwon (Korea Institute of Energy Research)
Heo, Jaehyeok (Korea Institute of Energy Research)
Kim, Minhwi (Korea Institute of Energy Research)
Publication Information
Korean Journal of Air-Conditioning and Refrigeration Engineering / v.30, no.4, 2018 , pp. 167-174 More about this Journal
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%.
Keywords
Thermal energy storage; Geothermal heat pump; Midnight power; Power load leveling;
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