Study of mine exhaust heat recovery with fully-coupled direct capture and indirect delivery systems

Hosein Kalantari and Seyed Ali Ghoreishi-Madiseh

Applied Energy, 2023, vol. 334, issue C, No S0306261923000430

Abstract: Mine exhaust heat recovery is deemed to be a promising solution to reduce the costs and carbon emissions associated with mine intake pre-heating systems. Although indirect shell and tube heat recovery units have been implemented, direct recovery (spray-based) systems with their high efficiency, easy-to-operate technology and lower capital costs can present a more techno-economic solution. This study aims to develop a numerical fully-coupled thermodynamic model to investigate the techno-economic-environmental viability of establishing a direct capture and indirect delivery mine exhaust heat recovery system for intake air heating. The key operating and design parameters affecting the performance of direct recovery system are identified through sensitivity analyses and optimized accordingly for a Canadian mining operation. The results of the direct recovery system are compared to its indirect counterpart indicating that the direct heat recovery system can over-perform its indirect counterpart in both energy cost savings and carbon emissions.

Keywords: Direct contact energy recovery; Mine exhaust heat recovery; Intake air heating; Underground mining; Mine ventilation (search for similar items in EconPapers)
Date: 2023
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Persistent link: https://EconPapers.repec.org/RePEc:eee:appene:v:334:y:2023:i:c:s0306261923000430

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DOI: 10.1016/j.apenergy.2023.120679

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