Heating, Ventilating and Air Conditioning (HVAC) systems of conventional gasoline-powered vehicles use the abundant coolant waste heat to achieve acceptable comfort in cold weather. Engine thermal losses in EVs and HEVs are too small to meet the heating load. A climate control system (including heating, cooling, ventilating and dehumidifying) has been developed. The Climate Control System has been designed from the ground up and it integrates a high performance hermetically sealed heat pump and a thermal storage unit. Energy regeneration allows for constant exchange of the cab's air and optimum air quality with efficient defogging and defrosting of windows without serious energy expenditure. Prototypes have been installed in a small delivery van converted to electricity and tested in a climate chamber (from -30 Cel to +30 Cel). The van has been operated with (and without) the system for comparison purposes. The performance analysis and the testing have highlighted many benefts of using the Integrated Climate Control System in EVs operating in cold climates with dramatically reduced energy consumption; unlike conventional air/air heat pumps, the integrated system can operate at temperatures as low as -20 Cel without significant loss of effectiveness; energy regeneration allows for constant exchange of the cab's air and optimum air quality with efficient deicing of windows without serious energy consumption. The integrated system offers a further advantage for the promotion of EVs. The system maintains optimum comfort, air quality, humidity control and deicing as soon as the vehicle is started, even at temperatures below -20 Cel which represents a distinct advantage even over conventional ICE vehicles.
Integrated HVAC system for electric vehicle in cold weather operation
Ein Klimatisierungs-System für elektrische Fahrzeuge mit Einsatz unter kalten Witterungsbedingungen
2001
8 Seiten, 7 Bilder, 7 Quellen
Conference paper
Storage medium
English
Integrated HVAC system for electric vehicle on cold weather operation
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