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High efficient desiccant coated heat exchanger based heat pump for rail transport decarbonization.

Number: 0073

Author(s) : SHAO Z., WANG Z. G., GE T. S., WANG R. Z.

Summary

In the rail sector, air conditioning accounts for 30% of the total operational energy consumption, but traditional air conditioning units (ACUs) for train vehicles usually have a low coefficient of performance (COP), often less than 2, because of condensation-based dehumidification and a consequent reheating process and the restricted spaces. Herein, we present a novel ACU with an integrated structural design that uses desiccant-coated heat exchangers (DCHEs) coupled with heat pumps, providing comfortable air conditioning on the metro or high-speed trains which can significantly contribute to the decarbonization of the sector. Using this design, experimental results show that the proposed system can improve the COP by ~40% under standard conditions compared with existing ACUs (2.5 vs. 1.8). In addition, the prototype achieves the highest COP of 2.8 under Shenzhen conditions (high humidity and temperature conditions) and exhibits high adaptability to various climate zones. 

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Pages: 12

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Details

  • Original title: High efficient desiccant coated heat exchanger based heat pump for rail transport decarbonization.
  • Record ID : 30031480
  • Languages: English
  • Subject: Technology
  • Source: Proceedings of the 26th IIR International Congress of Refrigeration: Paris , France, August 21-25, 2023.
  • Publication date: 2023/08/21
  • DOI: http://dx.doi.org/10.18462/iir.icr.2023.0073

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