Numerical Simulation of the Thermal Performance and Thermal Influencing Radius of a Heat-Transfer Pipe in a Backfill Body
Publication: Journal of Energy Engineering
Volume 150, Issue 3
Abstract
The horizontal ground heat exchanger has been extensively employed to collect geothermal energy from mine backfill bodies. A novel method for avoiding thermal interference using the thermal influencing radius coupling pipe spacing was investigated. Thermal interference between adjacent heat-transfer pipes can be neglected when is used as the pipe spacing. The comprehensive impacts of heat-transfer fluid and backfill body on the heat-transfer efficiency and thermal influencing radius of the horizontal single pipe were investigated. The growth ratio of heat-transfer capacity can be as high as 227.3% when thermal conductivity increases from to . The heat-transfer capacity increases by 4% for every 1°C reduction in inlet temperature. The thermal influencing radius is significantly influenced by specific heat capacity and thermal conductivity. This study can provide theoretical recommendations for the design and improvement of heat-transfer pipes in the backfill body.
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Data Availability Statement
All data, models, and code generated or used during the study appear in the published article.
Acknowledgments
This research was supported by the National Natural Science Foundation of China (Nos. 51974225, 51874229, 52004207, and 52104148).
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Published In
Journal of Energy Engineering
Volume 150 • Issue 3 • June 2024
Copyright
© 2024 American Society of Civil Engineers.
History
Received: May 15, 2023
Accepted: Dec 11, 2023
Published online: Feb 20, 2024
Published in print: Jun 1, 2024
Discussion open until: Jul 20, 2024
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