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The performance improvement and optimum control of the transcritical CO2 air conditioning and heat pump system used in the high-speed railway vehicles.

Author(s) : JIANG L., SONG Y., CHEN Y., XIE H., REN J., YIN X., CAO F., PANG X., BAI G., YANG T., SUN M.

Type of article: IJR article

Summary

To effectively respond to the goals of carbon neutrality and the Kigali Amendment, it is crucial to address the issue of refrigerant substitution in railway heat pump air conditioning systems. This article focuses on studying the challenges related to thermal management logic control when using CO2 as the alternative refrigerant for heat pump air conditioning in high-speed rail vehicles. The study includes the development of a comprehensive model of the entire cabin and heat pump air conditioning system cycle using the AMESim simulation platform. An experimental platform was also constructed to conduct relevant verification experiments. The unique operational conditions and requirements of high-speed railways necessitate distinct CO2 heat pump air conditioning requirements compared to passenger cars. The rail vehicles, characterized by high thermal load and inertia, exhibit slow temperature response rates. Conventional thermal management techniques employed in passenger cars often lead to frequent start-stop cycles of the compressor during dynamic vehicle operations(start and stop once every 200 s). By implementing new thermal management strategies, the duration of compressor start-stop cycles was extended(start and stop once every 1200 s), the starting constant cooling capacity is 10 kW, and the constant starting COP is around 2.5, aligning better with real-world practical applications.

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Pages: 12 p.

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Details

  • Original title: The performance improvement and optimum control of the transcritical CO2 air conditioning and heat pump system used in the high-speed railway vehicles.
  • Record ID : 30034554
  • Languages: English
  • Subject: Technology
  • Source: International Journal of Refrigeration - Revue Internationale du Froid - vol. 182
  • Publication date: 2026/02
  • DOI: http://dx.doi.org/https://doi.org/10.1016/j.ijrefrig.2025.11.009

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