Yes it did surprisingly.  If the box was equipment gray (I had 4 identical 
boxes) it would run hotter with a heat shield than the satellite white box with 
no shield.  

From: Lewis Bergman 
Sent: Monday, July 16, 2018 8:52 AM
To: AnimalFarm Microwave Users Group 
Subject: Re: [AFMUG] How to reliably cool a small enclosure in direct sunlight?

Are you saying white paint outperformed heat shields? That's awesome info. I 
always thought heart shields were the best. 


On Fri, Jul 13, 2018, 7:43 PM <[email protected]> wrote:

  I did a bunch of trials one summer testing a variety of methods including 
heat shields, exterior insulation, interior insulation, convection ventilation, 
forced ventilation, peltier effect active cooling.

  #1 by a long shot is painting the enclosure bright white.  


  From: Bill Prince 
  Sent: Friday, July 13, 2018 6:37 PM
  To: [email protected] 
  Subject: Re: [AFMUG] How to reliably cool a small enclosure in direct 
sunlight?

  1. Add a thermostatically controlled ventilation fan

  2. Put a heat shield up on the south side of the enclosure. This can be just 
a plate of aluminum, painted white on the sun side, and mounted to the 
enclosure with 1" standoffs

  We have a site like yours, and just the fan keeps the temperature below 120° 
F (49° C). I think if we added the heat shield we could drop it another 10° F.



bp
<part15sbs{at}gmail{dot}com>

On 7/13/2018 4:51 PM, Sterling Jacobson wrote:

    I’ve got a few side of the house enclosures exposed to direct sunlight part 
of the day.



    Inside the electronics are about ready to melt. Like 90C+ CPU temps.



    These are about 3’ x 3’ x 12 deep or something like that, so not a lot of 
room.



    What are you guys using to keep these things decently cool?


     



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