Performance Evaluation of a Thermal Load Reduction System in a Hyundai Sonata PHEV

Cory Kreutzer, Eugene Titov, James Gallagher, Matthew Scott, John Rugh

Research output: NRELPresentation


Increased adoption of electric-drive vehicles (EDVs) requires overcoming hurdles including limited vehicle range. Vehicle cabin heating and cooling demand for occupant climate control requires energy from the main battery and has been shown to significantly degrade vehicle range. During peak cooling and heating conditions, climate control can require as much or more energy as propulsion. As part of an ongoing project, NREL and project partners Hyundai America Technical Center, Inc. (HATCI), Gentherm , Pittsburgh Glass Works (PGW), PPG Industries, Sekisui, 3M, and Hanon Systems developed a thermal load reduction system in order to reduce the range penalty associated with electric vehicle climate control. Solar reflective paint, solar control glass, heated and cooled/ventilated seats, heated surfaces, and heated windshield with door demisters were integrated into a Hyundai Sonata plug-in hybrid electric vehicle (PHEV). Cold weather field-testing was conducted in Fairbanks, Alaska while warm weather testing was conducted in Death Valley, California to assess the system performance in comparison to the baseline production vehicle. In addition, environmental chamber testing at peak heating and cooling conditions was performed to assess the performance of the system in standardized conditions compared to the baseline. Experimental results are presented in this paper providing quantitative data to automobile manufacturers on the impact of climate control thermal load reduction technologies to increase the advanced thermal technology adoption and market penetration of electric drive vehicles.
Original languageAmerican English
Number of pages25
StatePublished - 2017

Publication series

NamePresented at SAE 2017 Thermal Management Systems Symposium, 10-12 October 2017, Plymouth, Michigan

NREL Publication Number

  • NREL/PR-5400-69118


  • chamber evaluation
  • climate control seating
  • cold weather field evaluation
  • door defrost/defogger
  • heated surfaces
  • Hyundai
  • increased EV range
  • PHEV
  • solar reflective glass
  • solar reflective paint
  • Sonata
  • thermal load reduction


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