Temperature > 15 - Jean Charles Athanase Peltier

Born on February 22, 1785, in Ham, France and died on October 27, 1845, in Paris, France. He was a French physicist who discovered, in 1834, that a metal junction (later known as a thermocouple) can produce heat or cold, depending on the direction of the electric current. This effect was named the Peltier effect in his honor. Although the Seebeck effect, which produces electrical energy through heat, had been discovered 13 years earlier by Thomas J. Seebeck, Peltier discovered the reversible ability of thermocouples to refrigerate, that is, to generate cold in the metal junction.