The National Renewable Energy Laboratory (NREL) has initiated projects to investigate the benefits and design challenges of using heat pipe/two-phase flow technologies to provide sub-system cooling and thermal management in future advanced vehicles, hybrid electric vehicles, and heavy-duty vehicles. Projects initially focused on vehicle instrument panel (IP) heat pipe cooling and passenger seat thermal management, but will also investigate engine cooling, electric motor cooling, and battery cooling in the future. Experimental results have demonstrated IP surface temperature reductions of 20°C-30°C during maximum solar intensity environments of 525-800 W/m2 (typical of Golden, CO from January to April) compared to uncooled conditions. The heat pipe cooling effect in the IP also reduced windshield temperatures by 9°C-12°C compared to the non-cooled configuration in April 2001 testing. In addition, IP cooling also appears to dramatically reduce cabin air temperature by 4°C-10°C during long-term vehicle thermal soak conditions in these tests. Current estimates indicate that cabin air temperature reductions of 4°C-6°C may reduce vehicle air conditioning compressor sizing requirements by 16%-25%, and increase vehicle fuel economy by 0.8-1.2 miles per gallon (mpg) and 1.6-2.5 mpg in current conventional vehicles with base fuel economies of 20 mpg and 30 mpg, respectively. IP temperature and cabin air temperature reductions were larger in higher solar intensity conditions.Freeze/thaw tests were also conducted on the heat pipe systems in the IP cooling demonstration at NREL. All the heat pipes survived the freezing event, and all but one heat pipe demonstrated the ability to start up and operate normally in both an evaporator-led thaw and a condenser-led thaw process.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Heat Pipe/Two-Phase Flow Systems For Vehicle Passenger Cabin Cooling


    Additional title:

    Sae Technical Papers


    Contributors:

    Conference:

    Future Car Congress ; 2002



    Publication date :

    2002-06-03




    Type of media :

    Conference paper


    Type of material :

    Print


    Language :

    English




    PASSENGER VEHICLE CABIN

    BELYJ DAVID MIKHAJLOVICH | European Patent Office | 2017

    Free access

    VEHICLE COMPUTER TO PASSENGER CABIN HEAT TRANSFER

    HU JEFFREY YIZHOU / AWAD ALLA MICHAEL ADEL / FERNANDES KEVIN et al. | European Patent Office | 2019

    Free access

    CABIN OF PUBLIC PASSENGER VEHICLE

    BELYJ DAVID MIKHAJLOVICH | European Patent Office | 2016

    Free access

    Safety passenger cabin for vehicle

    WAN ZHENGHUI | European Patent Office | 2020

    Free access

    CABIN OF PUBLIC PASSENGER VEHICLE

    BELYJ DAVID MIKHAJLOVICH / MORDVINOV VLADIMIR PETROVICH | European Patent Office | 2016

    Free access