Design and Implementation of a Thermal Load Reduction System in a Hyundai PHEV

Cory Kreutzer, John Rugh

Research output: NRELPresentation


Increased market penetration of electric drive vehicles (EDVs) requires overcoming a number of hurdles including limited vehicle range and the elevated cost of EDVs as compared to conventional vehicles. Climate control loads have a significant impact on range, cutting it by over 50% in both cooling and heating conditions. In order 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 PHEV. 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 and increased insulation 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 pages26
StatePublished - 2017

Publication series

NamePresented at the Vehicle Technologies Office (VTO) Annual Merit Review and Peer Evaluation, 5-9 June 2017, Washington, D.C.

NREL Publication Number

  • NREL/PR-5400-68106


  • automotive air conditioning
  • automotive heating
  • electric vehicle range
  • thermal load reduction


Dive into the research topics of 'Design and Implementation of a Thermal Load Reduction System in a Hyundai PHEV'. Together they form a unique fingerprint.

Cite this