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Comparison and evaluation of different A/C compressor concepts for electric vehicles.

Number: pap. 1434

Author(s) : AURICH J., BAUMGART R.

Summary

With the development of electric cars the cooling and heating of the passenger compartment became an even larger challenge for the automotive industry. Apart from the passenger compartment, the A/C system in today’s electric vehicles both cools and heats auxiliary devices like the battery and the power electronics. The high demand of heating and cooling power leads to a significant reduction in cruising range. For the A/C systems of electric vehicles, electric driven scroll compressors are widely used. These compressors have several advantages compared to axial piston compressors used in conventional cars, e.g. easy controllability as well as good efficiencies at high speeds. However, there are also some disadvantages like the higher production costs. Apart from these two mentioned compressor types, other compression principles are rarely investigated for the use in electric vehicles. Therefore, this contribution compares and evaluates different compressor types for the application in electric cars. The focus is on scroll, axial piston and rotary piston compressors. The main benchmarks are aspects like the coefficient of performance, the pressure pulsation and the compressor efficiencies at different operating conditions. The contribution starts with a short overview of the specific requirements for refrigerant compressors in electric vehicles. Then the mentioned compressors are investigated in detail on the basis of geometric and physical based numerical simulation models. Subsequently, their influence on the entire A/C circuit is presented. The paper closes with some recommendations for the application of the compressors as well as future development concepts.

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Pages: 10

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Details

  • Original title: Comparison and evaluation of different A/C compressor concepts for electric vehicles.
  • Record ID : 30024353
  • Languages: English
  • Source: 2018 Purdue Conferences. 24th International Compressor Engineering Conference at Purdue.
  • Publication date: 2018/07/09

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