One vote, white.
To further refine the question. Maybe a white sun shade, about a foot out,
would be workable. Plenty of air flow available.
Christopher A. Young
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The question at hand was obviously not whether the
color of a condensor makes a difference for a fridge in
general. The question was whether the color of a fridge
condensor that is outside, EXPOSED TO SUNLIGHT,
makes a difference.
"If a refrigerator is used outdoors, in the summer.
The condensor on the back, is black tubing. As
we know, black absorbs heat from the sun shine,
which makes the compressor work harder. "
Now, it seems you agree that white will reflect more of
the sunlight. At the same time, white paint and black
paint will both
allow about the same radiation from the condensor.
That means with white you radiate virtually the same
amount of heat out, but because it's white, it reflects
a lot of heat from the sun that it would absorb if it were
black. Ergo, if the condensor was
painted white instead of black, it would transfer virtually
the same amount of heat via radiation, but it would be
heated less by the sun.
And I also totally agree with Vic that the overwhelming
heat transfer from the condensor is via convection, not
radiation. So, again, which condensor is going to
be more efficient? A black one that has to not only
get rid of heat from the fridge mainly via convection, but
also the additional heat from the sun? Or a white one, that
has less heat absorbed from the sun? I vote for
Finally, I think the overall effect on efficiency of the
fridge from the color of the condensor with
sun shining on it is still probably small in the
grand scheme of things.