Peltier Generating More Watts Than A Solar Panel

[sm0ky2]

I've used them both
With TeaLight candles, sunlight, metal cups of hot water


CPU coolers suck as generators
They are designed as refrigerators/heat pumps
Voltage+current= hot and cold (on the two faces)
They are very inefficient, even as coolers/heaters
and consume quite a bit of electricity
They are just as bad at making it from heat and cold.


TEGs make much better generators
but because of the materials, supplying them with electricity
gives a lower temperature difference than a TEC with the same input.


Most of the white square units are TEC's, even the ones sold as "TEG's"
The Chinese companies just sell the TEC as both and deceive us


A couple of them are honest and actually produce both types
but from outward appearances it is difficult to tell the difference
you have to compare data sheets


And look at the output at a range of temperature differences that you
intent to be operating with.
And remember you have to keep the cold side cold
Heat will transfer through and heat it up.
this lowers the Difference in temperature
and lowers the output power

[sm0ky2]

@abb


A solar oven is basically a box with a glass or plastic window
You can make them out of junk and paint it black
or make it from aluminum foil
for next to no cost.
probably cheaper than your "greenhouse bowl"


Sun gives ~1kW/m^2 (at noon)
a solar death ray is made of tiny mirrors
or you can use a parabolic dish and cover it with Mylar
Either of these cost around 30-40$
with a glass cutter and some scrap mirrors, solar death ray can be free

[abbhawk]

What i talk about is to make what you call a solar oven, i just guess that you talk about similar to a solar cooker which is a real product to cook food in. Im sorry if it is me who use wrong words. Just wonder if true a box/oven like that get up to 200celcius or more, and is that a good temp for plastic?

Well actually i do not expect a 12v 12A = 145watt to operate at optimum performance continuesly. They do say that max heat do not provide max watt. But i kind of liked these better because i thought my heat was way lower than you expect it to be, so now i am a bit confused, dont really know what heat i got to work with...

You might be right about the choice of TEG, but it is a diffrence between no claim for how much it can produce (because they dont talk watt or Amph) but the peltiers clain at 145watt at max performance is probably also 100% higher than your TEG claim, so even if china peltier perform at 50% of your TEG, it still have higher output and cost  25%.

I do not say you are wrong but it would be nice if price to build is 25% of normal choice.

Maybe both products will be done when NASA find producer to their patent for monothermal device?

[franco malgarini]

When there is not the sun, you can use Hylsch tube

[franco malgarini]

Delta T also with zeolite:

http://rexresearch.com/zeolite/4924676.htm