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Experimental and numerical study of a mobile reversible air conditioning-heat pump system.

Number: pap. 2569

Author(s) : FENG L., HRNJAK P.

Summary

Electric vehicles suffer from ‘range anxiety’, while traditional resistive heating consumes a lot of electric energy and further reduces EV drive range largely. Mobile reversible air conditioning-heat pump system is an energy efficient way of providing heat to EV cabin climate. In this paper, an AC/HP system based on the Nissan Leaf system configuration was studied experimentally and numerically. This system consists of three heat exchangers, an openshaft compressor, two expansion valves, and two flow control valves. A system model was built, heating performance characteristics were investigated under various operating conditions, and were compared to experimental findings. Refrigerant charge imbalance when switching modes was found to be a challenge, and details of charge retention in components for both modes were experimentally measured and numerically modeled. Charge imbalance was found largely a result of liquid line size difference and condenser size difference. Modeling of void fraction in headers was noticed very important for good prediction of charge retention in microchannel heat exchangers.

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Pages: 10 p.

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Details

  • Original title: Experimental and numerical study of a mobile reversible air conditioning-heat pump system.
  • Record ID : 30018755
  • Languages: English
  • Source: 2016 Purdue Conferences. 16th International Refrigeration and Air-Conditioning Conference at Purdue.
  • Publication date: 2016/07/11

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