Peltier moduler opererer med temperaturforskel på rekordhøje 120 Kelvin
AMS Technologies præsenterer nye fejltolerante termoelektriske kølingselementer (Peltier moduler), der kan operere med temperaturforskelle på 120 Kelvin mellem den 'kolde' og 'varme' side (in english).With a novel technology approach, the new thermoelectric cooling elements (Peltier modules) from US manufacturer Sheetak, which have now been introduced by AMS Technologies, raise the achievable temperature differences between the hot and cold sides to a new level and thus significantly expand the application potential for thermoelectric cooling.
While most Peltier modules are designed as a series connection of individual p- and n-type elements, this new technology is based on a different topology. Arranged in a three-dimensional 'mix-and-match' layout, the thermoelectric components enable at least 25% higher temperature differences (delta T) compared to conventional technology – delta T can be as high as 120 Kelvin. With the previous technology, such temperature differences could only be achieved using Peltier cascades with significantly higher overall heights.
By the use of nanostructured material the height of the individual Peltier elements can be reduced down to 0.25 mm. On this basis, Peltier modules with very high power densities or very low thickness can be realized. For average temperature differences, i.e. about 50 K to 70 K, the new technology leads to a significant increase in efficiency or coefficient of performance (COP) by 30% to 100%. Whereas thermoelectric modules have previously been used in small systems to keep cool things cool, this new technology can now be utilized in deep-freeze applications down to -100 °C.
Due to their construction in a percolation layout, the Peltier modules are fault-tolerant. The failure of one of the individual elements does not lead to a total failure of the entire module as with a conventional p/n series connection, but the Peltier module continues to operate with slightly reduced performance. In addition to the technical performance data, the newly introduced Peltier modules feature special protection against moisture as well as very compact dimensions.