gyre wrote:How does that passive unit work?
I think heat venting on cars and trucks is a terrific place for solar.
A few cars come with it.
You don't need a battery and only enough control to protect the motor.
No sun, no fan.
No sun, no heat load.
They make cheapos and you can make a good one for $100-200.
gyre wrote:Nice photo.
I thought I had it, but I got lost somewhere.
There is no open vent to the outside?
Is it powered by heat from inside or sun hitting the pipe?
Is one inside the other?
I gather it acts as a radiator to dump heat?
gyre wrote:Is the stovepipe open to vent air out of the car?
Is the plastic clear?
If so, I've got it.
Classic stack vent, like a good attic system.
But it normally requires an inlet, even if it is small.
And it works better the lower the inlet is relative to the top of the pipe.
Did you find a big increase with the plastic around the pipe?
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