Peltier Generating More Watts Than A Solar Panel

[hydrocontrol]

Nice video that shows using a peltier.
http://www.metacafe.com/watch/1167872/alternative_electricity_energy_power_from_peltier/

You need a setup like this to check out what happens when you add multiple peltier junctions. I am surprised that he did not have two or three peltiers junctions hooked up with the size of the heat sinks he was using. Now take his setup and add a parabolic reflect dish to the mix.

[FreqShift]

The Peltier, or the "Solid State Thermal Electric Generator", as I like to call it, is now capable of much higher efficiencies:

See Here:

http://www.powerchips.gi/technology/pcalc.shtml

Using a small parabolic dish, it is now possible to generate several thousand watts of electricity.

Please see the posts here for more info:

http://www.overunity.com/index.php?topic=5453.msg196837;topicseen#msg196837

[sm0ky2]

where are you getting peltiers that only produce 20mv??

mine produce between 8 - 13VOLTS with a temp. diff of 200 degrees

this guy here has done some pretty kewl stuff with an archimedes-style solar collector.
http://solardeathray.com/

there are designs that work much better than this, using far less space. it's all about the angle of reflection, directing many suns into one spot, a lense can also be utilized to focus the beam even futher.

a basic 14-inch solar oven can reach over 350 degrees F.

a solar panel of a given area is going to waste almost all of the heat energy it collects from the sun.

theres no doubt that the sun puts out far more heat energy than 'visible' light.
the peltier vs solar panel argument, depends mostly on how each are configured. you can collect light and polarize it to make the solar panel more efficient,
or you can collect light and focus it to ake the heat collector more efficient..

overall the most efficient device i have seen for converting sunlight into usable energy is a solar collector to a sterling engine.

nothing else even comes close.

a 6-inch reflector dish can power a household hair dryer, even with the rediculous conversion losses of connecting the sterling to a magnetic motor/generator.

neither a solar array nor a peltier array can do that, or even a combination of both....

[triffid]

test,just wanted a link back to this thread.triffid

[kmarinas86]

This is interesting so I thought I might share it to see what the group thinks. I took a 1.5 sq. in. peltier and connected to a amp meter and a volt meter to see its output under heat conditions.
The peltier is under a glass bowl so I can get the maximum output using a greenhouse effect. At an outside temperature of 83 F. I am getting a reading of 200ma and 20mv output. This is really quite high.
A standard solar panel is around 24"x60" or 1440 in. sq. and will normally put out around 12v-17volts at ideally 100watts.
If the same number of peltier squares were connected in series (960) of them the output would be:
960 x 200ma=  192 amps
960 x 20mv  =  19.2 volts
or
w=va     192 amp x  19.2 volts=  3686 watts

That is an absolutely terrible calculation.

First of all, you claim that 960 of your peltier squares equals 1440 sq inches. That is 1.5 square inches per peltier square. Also, each of your squares produces 200ma at 20mv, which is equal to 0.004 watts. 0.004W * 960 equals 3.84W.

In other words, the correct calculation is:

IN PARALLEL
960 x 200ma = 192 amps
192 amps x .02 volts = 3.84 watts

IN SERIES
960 x 20mv = 19.2 volts
19.2 volts x .2 amps = 3.84 watts

Am I missing something here?

Yes.