Air Conditioner? - Page 2 - Electronic Circuits Projects Diagrams Free

Oznog · 15th August 2006, 07:15 AM

Generating power from a Peltier device is "Seebeck Effect", not Peltier Effect, though essentially they are two ways of looking at the same equation. Any Peltier device can be a Seebeck Thermoelectric Generator but devices specifically made to generate power can be more efficient because they can tolerate higher temperatures. There's a company called High-Z on the net that makes them.

There used to be a page detailing all the equations but I think it's long gone. It wasn't that great... I mean like a really high temp differential tuned to the device's max could generate like fews watts of power for a device, less power for a lesser temp differential. Probably under a watt for a solar-heated device of typical Peltier size. Also the device does conduct substantial heat across it so a solar heating plate with the cold side in the shade would heat up the cold side pretty quickly. In short it did not seem practical to compete with solar cells.

HarveyH42 · 15th August 2006, 04:05 PM

Wonder if you could generate enough power to run a well pump, use the water to cool the cold side. Basically free hot water for your house...

HarveyH42 · 12th September 2006, 05:16 AM

www.homepower.com/files/solarice.pdf

This is the article I remembered seeing! Can't believe its 1996... Wonder what the price tag would be 10 years later. $510.00 wouldn't be too bad to play with...

davew1301 · 4th October 2006, 11:56 AM

Hi guys,
What HarveyH42 is describing is a thermocouple! There are several instances of them being used in multiple series to power valve radios about 50-60 years ago from a gas flame (so my old Dad used to tell me) but I've never seen one in the flesh.

DaveW

5th October 2006, 06:56 PM

I did read a book "Modern Theromelectrics" published in the 80s that wasextremely informativer. Yes, Peltiers are very inefficeint 1-2% at the time maybe better today. There was a mention of a Russian generator that used a kerosene lamp with a vast number of junctions in the flue used to drive a radio, probably a cold cathode valve job. There were examples of military generators and air conditions in the book also. The nuclear devices used in heart pacemakers and spacecraft also use Peltier devices. A very interesting book.

tytower · 23rd December 2006, 11:55 PM

http://en.wikipedia.org/wiki/Icyball

Thanks

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15th August 2006, 07:15 AM	(permalink)
Oznog	Generating power from a Peltier device is "Seebeck Effect", not Peltier Effect, though essentially they are two ways of looking at the same equation. Any Peltier device can be a Seebeck Thermoelectric Generator but devices specifically made to generate power can be more efficient because they can tolerate higher temperatures. There's a company called High-Z on the net that makes them. There used to be a page detailing all the equations but I think it's long gone. It wasn't that great... I mean like a really high temp differential tuned to the device's max could generate like fews watts of power for a device, less power for a lesser temp differential. Probably under a watt for a solar-heated device of typical Peltier size. Also the device does conduct substantial heat across it so a solar heating plate with the cold side in the shade would heat up the cold side pretty quickly. In short it did not seem practical to compete with solar cells. __________________ I thought what I'd do was I'd pretend I was one of those deaf-mutes.

15th August 2006, 04:05 PM	(permalink)
HarveyH42	Wonder if you could generate enough power to run a well pump, use the water to cool the cold side. Basically free hot water for your house...

12th September 2006, 05:16 AM	(permalink)
HarveyH42	www.homepower.com/files/solarice.pdf This is the article I remembered seeing! Can't believe its 1996... Wonder what the price tag would be 10 years later. $510.00 wouldn't be too bad to play with...

4th October 2006, 11:56 AM	(permalink)
davew1301	Hi guys, What HarveyH42 is describing is a thermocouple! There are several instances of them being used in multiple series to power valve radios about 50-60 years ago from a gas flame (so my old Dad used to tell me) but I've never seen one in the flesh. DaveW

5th October 2006, 06:56 PM	(permalink)
Paul Obrien	I did read a book "Modern Theromelectrics" published in the 80s that wasextremely informativer. Yes, Peltiers are very inefficeint 1-2% at the time maybe better today. There was a mention of a Russian generator that used a kerosene lamp with a vast number of junctions in the flue used to drive a radio, probably a cold cathode valve job. There were examples of military generators and air conditions in the book also. The nuclear devices used in heart pacemakers and spacecraft also use Peltier devices. A very interesting book.

23rd December 2006, 11:55 PM	(permalink)
tytower	Try the Icyball http://en.wikipedia.org/wiki/Icyball Thanks __________________ I Hate Microsoft-the site below says it well http://www.vanwensveen.nl/rants/micr...eMS_intro.html Last edited by tytower; 25th December 2006 at 07:43 PM.