Long-term performance of a front-end capillary heat exchanger for a metro source heat pump system

Yongming Ji, Wenze Wu and Songtao Hu

Applied Energy, 2023, vol. 335, issue C, No S0306261923001368

Abstract: In recent years, the number of subways has rapidly increased, as they can effectively alleviate urban traffic congestion. However, subways can also result in thermal pollution problems in underground spaces. The long-term operation of a subway causes thermal accumulation in the surrounding rock of a tunnel, severely affecting the safe and efficient operation of the subway. The metro source heat pump technology is an effective approach to address the foregoing problem. However, currently, the research on its systematic design methods remains inadequate. In particular, studies on the evolution law of heat transfer characteristics of its front-end heat exchangers during years of operation are limited.

Keywords: Subway; Heat pump; Capillary; Heat exchanger; Carbon-neutral (search for similar items in EconPapers)
Date: 2023
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Citations: View citations in EconPapers (7)

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DOI: 10.1016/j.apenergy.2023.120772

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