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Assessment of natural refrigerants for thermal management in battery-electric long-distance buses.

Number: 1153

Author(s) : HELLMUTH J. F., POLLAK M., SCHULTE A., TEGETHOFF W., KÖHLER J.

Summary

In electric buses, the thermal management system has a major influence on energy consumption and, therefore, the vehicle’s range. The thermal management system of an electrified long-distance bus faces competing goals such as passenger and driver comfort and minimum battery degradation or minimal energy consumption, making the design a challenge. A reversible heat pump is used for air conditioning of the bus cabin and battery cooling. To design the thermal management system and select a refrigerant, a physics-based full-vehicle model is used that considers cross-couplings and boundary conditions of real-world applications to assess natural refrigerants, R744 and R290, for the thermal management system. The model includes the drivetrain, the thermal management system and the bus cabin. The performance of a battery-electric bus on typical long-distance routes is considered, including fast-charging and winter and summer scenarios. Recommendations on the selection of appropriate refrigerants for each scenario are made based on the simulation.

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Pages: 12 p.

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Details

  • Original title: Assessment of natural refrigerants for thermal management in battery-electric long-distance buses.
  • Record ID : 30032676
  • Languages: English
  • Source: 16th IIR-Gustav Lorentzen Conference on Natural Refrigerants (GL2024). Proceedings. University of Maryland, College Park, Maryland, USA, August 11-14 2024
  • Publication date: 2024/08
  • DOI: http://dx.doi.org/10.18462/iir.gl2024.1153

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