Thermal Load Reduction System Development in a Hyundai Sonata PHEV

Cory Kreutzer, Jeff Tomerlin, John Rugh

Research output: Contribution to conferencePaperpeer-review

3 Scopus Citations


Increased market penetration of electric drive vehicles (EDVs) requires overcoming a number of hurdles, including limited vehicle range and the elevated cost in comparison to conventional vehicles. Climate control loads have a significant impact on range, cutting it by over 50% in both cooling and heating conditions. To minimize the impact of climate control on EDV range, the National Renewable Energy Laboratory has partnered with Hyundai America and key industry partners to quantify the performance of thermal load reduction technologies on a Hyundai Sonata plug-in hybrid electric vehicle. Technologies that impact vehicle cabin heating in cold weather conditions and cabin cooling in warm weather conditions were evaluated. Tests included thermal transient and steady-state periods for all technologies, including the development of a new test methodology to evaluate the performance of occupant thermal conditioning. Heated surfaces demonstrated significant reductions in energy use from steady-state heating, including a 29%-59% reduction from heated surfaces. Solar control glass packages demonstrated significant reductions in energy use for both transient and steady-state cooling, with up to a 42% reduction in transient and 12.8% reduction in steady-state energy use for the packages evaluated. Technologies that demonstrated significant climate control load reduction were selected for incorporation into a complete thermal load reduction package. The complete package is set to be evaluated in the second phase of the ongoing project.

Original languageAmerican English
Number of pages8
StatePublished - 28 Mar 2017
EventSAE World Congress Experience, WCX 2017 - Detroit, United States
Duration: 4 Apr 20176 Apr 2017


ConferenceSAE World Congress Experience, WCX 2017
Country/TerritoryUnited States

Bibliographical note

Publisher Copyright:
Copyright © 2017 SAE International.

NREL Publication Number

  • NREL/CP-5400-67730

Other Report Number

  • SAE Technical Paper No. 2017-01-0186


  • climate control
  • cooling
  • EDVs
  • electric drive vehicles
  • heating
  • range


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