Results 1 to 4 of 4
  1. #1
    Join Date
    Apr 2014
    Location
    turkey
    Posts
    1
    Rep Power
    0

    heat transfer coefficient for a vehicle



    good after noon everybody

    I really need your help and expertise, I need to calculate the amount of heat transfer for a vehicle's cabin but I am facing some troubles finding the heat coefficients for the parts such as the roof, windows,......etc. I also need the heat coefficient for the air flowing around the car, is there any tables I can directly take these values from or do I need to make an assumptions and calculate the heat transfer coefficient for the air flow based on its nature ( laminar or turbulent).

    please I need your advice and it is urgent, I really appreciate your support.
    (p.s. my apologizes for any lingual mistakes)



  2. #2
    Join Date
    Oct 2003
    Location
    Belgium
    Age
    55
    Posts
    5,516
    Rep Power
    27

    Re: heat transfer coefficient for a vehicle

    IMpossibel to calculate, to many variables which you don't know (air infiltartion, fresh/air intake, outside conditions,..). Refer to existing systems for this.
    It's better to keep your mouth shut and give the impression that you're stupid than to open it and remove all doubt.

  3. #3
    Join Date
    Oct 2007
    Location
    sweden
    Posts
    93
    Rep Power
    14

    Re: heat transfer coefficient for a vehicle

    Best way is measure on existing vehicle's in same size you calculate on, look on capacity for heating and cooling and be not surprise capacity on heating/cooling can be pretty high.

    for standard personal car is cooling/heating capacity can be between 4-7 kW and in cooling case, how much window area take in sun and painting color on vehicle's have big impact how you feeling inside and also cooling demand.

    ie driver and passenger sitting in flow of temperature controlled airflow and not caculate so much insulation help from cabins wall and window... and if stops engine, heat or cooling disappear very quickly...

  4. #4
    Join Date
    Mar 2009
    Location
    U.S.A.
    Posts
    300
    Rep Power
    12

    Re: heat transfer coefficient for a vehicle

    Gross generalization but:

    Radiant Heat Xfer is dominant and the slope of glass and absorption of surfaces below the glass is greatly involved (the greenhouse effect....)

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •