Study on the Effect of Ground Heat Storage by Solar Heat Using Numerical Simulation

Energies

Jin-Hwan Oh²  Yujin Nam¹ 

[1] Department of Architectural Engineering, Pusan National University, 2 Busandaehak-ro 63, Geomjeong-gu, Busan 609-735, Korea

关键词: heat storage;    solar collector;    heat extraction;    simulation;    geothermal;   

DOI  :  10.3390/en81212388

来源: mdpi

【 摘 要 】

Recently, energy storage techniques using renewable energy efficiently have attracted considerable attention. However, there are several problems when using renewable energy. In the case of solar energy, the energy production time is different from the consumption time, and the use of geothermal energy has high investment costs. In order to solve these problems, it is essential to develop high-efficiency systems using both solar and geothermal energy simultaneously and efficiently. Thus, in this study, the performance of underground heat storage of solar energy was examined by simulation using models of underground heat transfer and heat exchange for the development of an integrated hybrid system exploiting both geothermal and solar energy. As a result, the heat extraction performance was determined to be up to 72.75 W/m. As a result, in Kagoshima, the most southern area in Korea, a case of six hour heat storage operation achieved the highest heat exchange rate of 72.75 W/m, which is approximately 105% higher than the case of operation without heat storage.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.