Battery electric vehicles (EV) present a particular challenge to the development of more efficient and effective heating and cooling systems for automotive applications. Because heating-ventilating-air conditioning (HVAC) systems are electrically powered, vehicle range is reduced when the HVAC system is operating. Consequently, it is necessary to devise new approaches which significantly reduce the HVAC energy requirements. Specifically, the summertime interior heat load must be reduced by limiting infrared (IR) energy transmission into the passenger compartment, and, heat pump coefficient of performance (COP) needs substantial improvement. Furthermore, wintertime heating and defrosting requirements may consume half the electrical energy stored in the battery if based on electrical heaters. The scope of this paper is limited to identifying and evaluating the alternative solutions to HVAC battery electric vehicles. These include: basis for determining HVAC boundary design assumptions and showing mathematical methods for estimating the HVAC load and energy requirements; evaluation of the new European and Japanese approaches to wintertime heating, such as: NaS battery, motor and component waste heat recovery, electric seat warmer, radiant foot warmer, electric windshield and backlight defrost, molten salt latent heat storage, metal hydride hydrogen storage and catalytic heater, and, liquid fueled heater.


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    Title :

    Heating and cooling battery electric vehicles - the final barrier


    Additional title:

    Heizung und Kühlung batteriebetriebener Elektrofahrzeuge - die letzte Barriere


    Contributors:


    Publication date :

    1993


    Size :

    6 Seiten, 7 Bilder, 3 Tabellen, 6 Quellen



    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English





    Battery Heating System for Electric Vehicles

    Kawachi, Hideomi / Baba, Hiroyasu / Kawasaki, Koji | SAE Technical Papers | 2015