[DeTomaso] Thermodynamics question

Ken Green kenn_green at yahoo.com
Wed Aug 4 12:43:53 EDT 2010


Jerry,
 
    The color is related to the emissivity of a body which is part of radiative heat transfer equation and the heat radiated is proportional to the absolute temperature to the fourth power.  I don't think an automotive radiator radiates much heat because it's not hot enough.  Most the heat is transferred by conduction to the air passing through and making contact with the radiator and could care less about the color.  Aluminum is a good heat conductor and painting an aluminum radiator might only serve to add some insulation which would reduce the conductive heat transfer.
 
Ken

--- On Wed, 8/4/10, Jerry R Knotts <knottsj at galstar.com> wrote:


From: Jerry R Knotts <knottsj at galstar.com>
Subject: [DeTomaso] Thermodynamics question
To: detomaso at realbig.com
Date: Wednesday, August 4, 2010, 8:47 AM


I have noticed in the last 3 radiators that I have purchased they are all 
aluminum colored.  I am currently looking at a couple of intercoolers and 
they are polished SS.  In the "old days" radiator and heater cores were 
black.  I thought that this was for additional heat conductivity.  Have the 
thermodynamic rules changed or are we accosted with "Bling".

Thanks in advance,
jerry (Wishing I was an engineer) Knotts 

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