THERMAL SCIENCE

International Scientific Journal

CHARACTERISTICS OF GEOTHERMAL ENERGY OBTAINED FROM A DEEP WELL IN THE COLDEST PROVINCIAL CAPITAL OF CHINA

ABSTRACT
The abundantly available renewable geothermal energy resources play an important role in people’s life in the applications of hot water supply, greenhouse heating, air conditioning, electricity generating, breeding, incubating, drying, irrigating, refrigeration, and so on. This study investigated the characteristics of geothermal energy obtained from a 100 m deep well in Harbin, the coldest provincial capital of China. The effects of air temperature, wind scale, and fluid velocity were also studied. When the air temperature varied in the range of -21.76 ~ -15.27 oC and the wind scale was in the range of 2-5, the tube and soil temperatures varied in the ranges of -1.3~1.8, 3.9~4.6, 6.6~7.7, 7.7-8.7, 8.9~9.8, 10.4~11.3, 11.9~13.1, and 13.4~14.8 oC for the well depths of 1, 5, 10, 20, 40, 60, 80, and 100 m, respectively. Ambient conditions had significant effect on the soil temperature above 1 m whereas nearly no effect on the soil temperature under 5 m. When the fluid velocities were between 0.09 m/s and 0.18 m/s, the tube temperatures reached stable within one hour, and the fluid velocity had slight effect on the tube temperatures. The results obtained from this study offer precious geothermal energy information for the cold regions of China and also the whole world.
KEYWORDS
PAPER SUBMITTED: 2017-07-08
PAPER REVISED: 2017-12-25
PAPER ACCEPTED: 2017-12-27
PUBLISHED ONLINE: 2018-02-18
DOI REFERENCE: https://doi.org/10.2298/TSCI170708052Z
CITATION EXPORT: view in browser or download as text file
THERMAL SCIENCE YEAR 2018, VOLUME 22, ISSUE Supplement 2, PAGES [S673 - S679]
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© 2018 Society of Thermal Engineers of Serbia. Published by the Vinča Institute of Nuclear Sciences, Belgrade, Serbia. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution-NonCommercial-NoDerivs 4.0 International licence