The Humidity Control System Applied to Reduce Ventilation Heat Loss of HVAC Systems

Paper #:
  • 2011-01-0134

Published:
  • 2011-04-12
Citation:
Hirai, S., Kataoka, T., Kumada, T., and Goto, T., "The Humidity Control System Applied to Reduce Ventilation Heat Loss of HVAC Systems," SAE Technical Paper 2011-01-0134, 2011, https://doi.org/10.4271/2011-01-0134.
Pages:
11
Abstract:
Vehicles have been more required to save energy against the background of the tendency of ecology. As the result of improving efficiency of internal combustion engines and adoption of electric power train, heat loss from engine coolant, which is used to heat the cabin, decreases and consequently additional energy may be consumed to maintain thermal comfort in the passenger compartment in winter. This paper is concerned with the humidity control system that realizes reduction of ventilation heat loss by controlling recirculation rate of the HVAC system by using highly accurate humidity sensor to evaluate risk of fogging on the windshield. As the results of the control, fuel consumption of hybrid vehicles decreases and maximum range of electric vehicles increases.
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