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Energies 2016, 9(2), 108; doi:10.3390/en9020108

Performance and Feasibility Study of a Standing Column Well (SCW) System Using a Deep Geothermal Well

1
Department of Architectural Engineering, Pusan National University, 2 Busandaehak-ro 63, Geomjeong-gu, Busan 609-735, Korea
2
Division of Geologic Environment, Korea Institute of Geoscience and Mineral Resources, 124, Gahang-no, Yuseong-gu, Daejeon 305-350, Korea
*
Author to whom correspondence should be addressed.
Academic Editor: Kamel Hooman
Received: 7 December 2015 / Revised: 4 February 2016 / Accepted: 4 February 2016 / Published: 17 February 2016
View Full-Text   |   Download PDF [6080 KB, uploaded 17 February 2016]   |  

Abstract

Deep geothermal heat pump systems have considerable energy saving potential for heating and cooling systems that use stable ground temperature and groundwater as their heat sources. However, deep geothermal systems have several limitations for real applications such as a very high installation cost and a lack of recognition as heating and cooling systems. In this study, we performed a feasibility assessment of a Standing Column Well (SCW) system using a deep geothermal well, based on a real-scale experiment in Korea. The results showed that the temperature of the heat source increased up to 42.04 °C in the borehole after the heating experiment, which is about 30 °C higher than that of normal shallow geothermal wells. Furthermore, the coefficient of performance (COP) of the heat pump during 3 months of operation was 5.8, but the system COP was only 3.6 due to the relatively high electric consumption of the pump. Moreover, the payback period of the system using a deep well for controlled horticulture in a glass greenhouse was calculated as 6 years compared with using a diesel boiler system. View Full-Text
Keywords: deep geothermal well; Standing Column Well system; heat pump; controlled horticulture deep geothermal well; Standing Column Well system; heat pump; controlled horticulture
This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Cho, J.-H.; Nam, Y.; Kim, H.-C. Performance and Feasibility Study of a Standing Column Well (SCW) System Using a Deep Geothermal Well. Energies 2016, 9, 108.

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