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Montie
science forum beginner
Joined: 28 Nov 2005
Posts: 1
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 Posted: Mon Nov 28, 2005 4:22 pm Post subject:
Effects of Paint on a Heat Sink
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Morning All,
I'm working on calculating the the thermal effects of painting an
aluminum heat sink. Anyone have any suggestions on where I can find
any of the following:
- literature or website about the effects of paint on heat sinks
- a listing of the thermal conductivity of any paint
Any suggestions?
Thanks,
Montie Roland
montie@montie.com
Montie Design
www.montie.com |
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A Espinoza
science forum beginner
Joined: 14 Sep 2005
Posts: 19
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| Posted: Mon Nov 28, 2005 11:41 pm Post subject:
Re: Effects of Paint on a Heat Sink
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Montie wrote:
| Quote: | Morning All,
I'm working on calculating the the thermal effects of painting an
aluminum heat sink. Anyone have any suggestions on where I can find
any of the following:
- literature or website about the effects of paint on heat sinks
- a listing of the thermal conductivity of any paint
Any suggestions?
Thanks,
Montie Roland
montie@montie.com
Montie Design
www.montie.com
|
My question for you is why would you want to paint a heat sink?
Most polymers are good insulators, as are the majority of pigments used
in paints. Painting the heat sink would just put an insulating layer on
it and reduce the heat transfer rate. |
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Martin Brown
science forum addict
Joined: 12 May 2005
Posts: 82
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| Posted: Tue Nov 29, 2005 8:42 am Post subject:
Re: Effects of Paint on a Heat Sink
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A Espinoza wrote:
| Quote: | Montie wrote:
Morning All,
I'm working on calculating the the thermal effects of painting an
aluminum heat sink. Anyone have any suggestions on where I can find
any of the following:
- literature or website about the effects of paint on heat sinks
- a listing of the thermal conductivity of any paint
Any suggestions?
|
Anodising with a black dye instead?
| Quote: | My question for you is why would you want to paint a heat sink?
Most polymers are good insulators, as are the majority of pigments used
in paints. Painting the heat sink would just put an insulating layer on
it and reduce the heat transfer rate.
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For a forced air cooling system that would certainly be true. But a
passive radiating heatsink would be cooler if covered in a thin coat of
paint instead of bare metal (a lousy radiator of IR).
Regards,
Martin Brown |
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Andy
science forum beginner
Joined: 08 Sep 2005
Posts: 12
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| Posted: Fri Dec 02, 2005 4:31 am Post subject:
Re: Effects of Paint on a Heat Sink
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Martin Brown wrote:
| Quote: | A Espinoza wrote:
Montie wrote:
Morning All,
I'm working on calculating the the thermal effects of painting an
aluminum heat sink. Anyone have any suggestions on where I can find
any of the following:
- literature or website about the effects of paint on heat sinks
- a listing of the thermal conductivity of any paint
Any suggestions?
Anodising with a black dye instead?
My question for you is why would you want to paint a heat sink?
Most polymers are good insulators, as are the majority of pigments
used in paints. Painting the heat sink would just put an insulating
layer on it and reduce the heat transfer rate.
For a forced air cooling system that would certainly be true. But a
passive radiating heatsink would be cooler if covered in a thin coat of
paint instead of bare metal (a lousy radiator of IR).
Regards,
Martin Brown
Have you considered black anodization to improve radiation without |
adding a painted coating?
Andy Estes |
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