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Old 06-06-13, 01:01 PM   #7
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Originally Posted by Ryland View Post
... 300 watt input for 800 watts worth of heat output...
800/300 x 100 = 267%

This is absolutely the first time I have heard of a Peltier junction efficiency achieving anything remotely close to 267% as you stated. The efficiency I have usually seen quoted is in the neighborhood of 17%.

Did you do the tests yourself? Do you know of any studies that match, or even vaguely approximate your results?

I would be very interested to know, as most ASHPs in operation today are about as efficient as you are stating.


Originally Posted by Ryland View Post
...800 watts worth of heat output, cost was about $80...
This would mean that 800 watts out = 800 x 3.412 = 2,729.6 BTU/hr

So, in HVAC terms, where 1 Ton of AC = 12000 BTU...

You would require (12,000/2,729.6) x $80 = $343.35 worth of Peltier Junctions per Ton of HVAC equivalent heating. This would make it at a very minimum, 2x more cost efficient to buy than almost any existing vapor-compression machine.

Are you completely sure of your numbers?

If this is true, a revolution in heating and cooling should now be underway.

Personally, I suspect that there is an error in your numbers.

I'm not an HVAC technician. In fact, I'm barely even a hacker...
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