Peltier I started to deal with in 1993, in a small laboratory scale.In the following years I did in the mid-scale laboratory I made such a demonstration, where the yen element size 50mmm x50mm is placed on an aluminum bracket, on the other hand, covered with a copper plaque, located to the heat from a finger could easily trickle out over the entire surface of the ceramic peltier.
[youtube]http://www.youtube.com/watch?v=14WPA2i-uNQ[/youtube]
Also done once a thermometer measuring the wireless side of aluminum and copper hand when I touched her finger. It turned out that the temperature difference was only 2 to 3 degrees Celsius, and has to show voltage of tens of millivolts, as a result of the heat of the finger ... Despite the fact that we do not need to produce electricity already heated water, replace it on steam, drive turbines ing or reciprocating engine, then the generator, electricity can receive this very simple method and a minimum temperature difference ..
Well, for example, temperature 2 meters under the ground and air temperature of 30 degrees Celsius .. The outside can be also negatynie 20 degrees Celsius, and the resulting current changes polarity only ... And here again joke .. The greater this negative temperature, the greater the difference in the temperature of 2 meters below the surface (about 7 degrees)and you get more power .. so I dreamed we would have this .. the bigger the frost, we have more energy ..And here the principle of T1-T2 / T1 does not look to the end was a real .... For where, for example, we have in the way of the physical size of the time? because there is a fundamental difference if you have time 0.01 sec or 10000 sec .... a rhetorical question ...
Andrew