The range of Electric Vehicles is highly influenced by the electric power consumed by auxiliaries, a huge part of this power being used for cabin heat-up and cool-down operations in order to ensure an acceptable level of thermal comfort for the passengers. Driving range decreases with low temperatures in particular because cabin heating system requires an important amount of electric power. Range also decreases with high ambient temperatures because of the air conditioning system with electrically-driven compressor. At the same time, batteries and electric motors operates at their maximal efficiency in a certain range of temperature. The reduced EV driving range under real life operating cycles, which can be a barrier against market penetration, is an issue for further development in the future towards sophisticated cabin heating and cooling systems, as well as battery warmer. The aim of this paper is to highlight the benefits of a system simulation approach, based on LMS Imagine.Lab AMESim, in order to estimate the impact of various technologies of cabin heating and cooling on both the cabin temperature and the driving range. In this paper, a battery electric vehicle including a cabin heating with PTC device and a R134a refrigerant loop is simulated under various ambient temperatures on a given driving cycle with the same required cabin temperature target. Simulation outputs include the cabin temperature evolution, the battery state of charge and as a consequence the driving range. The numerical model presented in this paper allows estimating the energy consumption of an Electrical Vehicle, as well as the cabin temperature The split between the energy requested by the propulsion and the passenger thermal comfort devices (R134a refrigerant loop and PTC heaters) is presented, as well as an estimation of the losses into the main electrical components battery and propulsion This numerical model can be used to quickly assed the following scenarios, some of them implying some architectural changes of the model: 1. simulate other drive cycles (European, Japanese, USA or custom), 2. simulate other refrigerants 1234yf, CO2..., 3. simulate other cooling and heating technologies such as heat pumps, 4. simulate the impact of cabin insulation, positive in term of cabin temperature but negative in term of weight increase for example.


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    Titel :

    Impact of passenger thermal comfort and electric devices temperature on range: A system simulation approach


    Beteiligte:

    Erschienen in:

    Erscheinungsdatum :

    2012


    Format / Umfang :

    8 Seiten, 19 Bilder, 1 Tabelle, 8 Quellen



    Medientyp :

    Aufsatz (Konferenz)


    Format :

    Print


    Sprache :

    Englisch




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