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Study on the asymmetric thermodynamic process of an EV scroll compressor.

Number: 1238

Author(s) : ZHAO Z., WU J., ZHANG S., WANG C., LI J.

Summary

The air conditioning system in the TMS of EVs has high energy consumption, which seriously impacts the cruising range of EVs, and this part of the energy consumption mainly comes from the scroll compressor. The development trend of the EV scroll compressor is towards miniaturization, which results in the compressor often having a shorter scroll wrap and possibly needing to operate at speeds up to nearly 10000 rpm. Furthermore, the smaller built-in volume ratio may cause discharge delay under typical operating conditions. The scroll plate features, including the lengths of the scroll wraps, the shape and position of the ports, and the crescent groove at the beginning of the orbiting scroll, make the fluid flow within the scroll chambers complicated, resulting in the thermodynamic process becoming significantly asymmetric. To study the asymmetric thermodynamic process of the EV scroll compressor under different operating conditions and speeds, this paper established a corresponding mathematical model of the compressor, which mainly includes the geometry analysis model, the thermodynamic process model considering the bypass flow process, and the valve dynamics model coupled with the former. The thermodynamic process of the scroll compressor was calculated and analyzed. The asymmetric compression characteristics under different working conditions and speeds were revealed.

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  • Original title: Study on the asymmetric thermodynamic process of an EV scroll compressor.
  • Record ID : 30033589
  • Languages: English
  • Subject: Technology
  • Source: 2024 Purdue Conferences. 27th International Compressor Engineering Conference at Purdue.
  • Publication date: 2024/07/18

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