Thermoelectric Cooling

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thermoelectric cooling

[¦thər·mō·i′lek·trik ′kül·iŋ]
Cooling of a chamber based on the Peltier effect; an electric current is sent through a thermocouple whose cold junction is thermally coupled to the cooled chamber, while the hot junction dissipates heat to the surroundings. Also known as thermoelectric refrigeration.

Thermoelectric Cooling


the absorption of heat when an electric current is passed through a thermal converter.

The essence of thermoelectric cooling lies in the appearance of a temperature difference at the junctions of the thermal converter; at the cold junction, heat is absorbed from the substance to be cooled, and the heat is transferred to the hot junction and later to the environment (seePELTIER EFFECT). Concurrently with the generation of cold, heat is liberated in the circuit of the thermal converter and transferred to the cold junction by conduction. The resultant characteristic of the cooling capacity of the thermal converter used for thermoelectric cooling is the efficiency Z = α2/ρλ, where a is the thermoelectric power, λ is the specific heat conductivity, and p is the specific electric resistance. Semiconductors (Z = 1.5–3.5 deg–1)—for example, triple alloys of antimony, tellurium, bismuth, and selenium—are ordinarily used for producing the thermal converters for thermoelectric cooling. Thermoelectric coolers are simple in design, have no moving parts or coolants, and are safe in use but are wasteful of energy (the specific consumption of electricity is 6–8 times greater than in compressor refrigerators). Thermoelectric cooling is ordinarily used in installations with a refrigerating capacity of up to 100 watts, which find practical application in electronics, vacuum technology, instrument-making, and medicine.


References in periodicals archive ?
Tenders are invited for Avalanche Photodiode With Integrated Amplifier, Power Supply And Te Cooler
In the integrated system, the TE cooler is utilized as a subcooler of the VCC condenser or gas cooler.
Typically, conventional vapor compression air conditioning systems operate at a higher COP over a larger temperature difference than current TE cooler operation.
As summarized, there have been some efforts to improve TE cooler designs, and attempts to employ TE subcoolers in the vapor compression cycle.
The TE cooler reduces the CCD temperature, decreasing dark noise, improves dynamic range, and offers long-term operation stability.
The H9170-45/ H9170-75 photo, multiplier tube (PMT) modules combine a sensitive PMT, air-cooled TE cooler and HV power supply with protection circuit.
1-y]Te super-lattice TE coolers using molecular beam epitaxy.
Marlow Indusries, a processor of raw materials used in thermoelectric (TE) semiconductors which are assembled as TE coolers, and integrated into heat exchangers for commercial and defense application, describes its quality management as a top-to-bottom approach to continuous improvement.