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

Authors :
Jeong-Heum Cho
Yujin Nam
Hyoung-Chan Kim
Source :
Energies (19961073); Feb2016, Vol. 9 Issue 2, p108, 13p, 5 Diagrams, 9 Charts, 5 Graphs
Publication Year :
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. [ABSTRACT FROM AUTHOR]

Details

Language :
English
ISSN :
19961073
Volume :
9
Issue :
2
Database :
Complementary Index
Journal :
Energies (19961073)
Publication Type :
Academic Journal
Accession number :
113298899
Full Text :
https://doi.org/10.3390/en9020108