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 ?
A module of PCD consists of a Peltier device, a heat sink connected to the hot side, and a cooling-load heat exchanger connected to the cold side.
Other subjects include a novel approach to MEMS based on biological sensory systems, design considerations of membrane structure for a thermal actuated micropump, fabrication of a Peltier device based on InSb and SbTe thin films, and a method for quantification of meta-amyloid using a photo-sensitive thin film transistor.
There are three basic parameters that need to be known for Peltier device choosing: the two temperatures that define the gradient across the thermoelectric element and the total amount of heat that must be pumped by the
It manufactures an assembly that includes a thermoelectric-cooling Peltier device.
A built-in Peltier device lowers temperature from room temperature to -5 C in 15 minutes and holds the temperature to within 0.
a Peltier device, a small ceramic-based solid-state unit that works as a heat pump) so that when the occupant gets into a hot car there is the sensation of cooling.
Temperature control is by means of a Peltier device which is said to offer simplicity and compactness, as well as relatively rapid changes in set point temperature.
The Peltier device uses the cyclone principle of centrifugal force to push the sampled gas against the cooled wall of the heat exchanger in the module.
A quick quality check can be accomplished with an AC ohms measurement on the Peltier device and its thermistor feedback element.
The fundamental component of this camera is a TC245 CCD chip, manufactured by Texas Instruments, which includes dark noise reduction through the use of a peltier device, which cools the CCD chip.
Furthermore, since the temperature characteristics-free etalon filter does not require a Peltier device for temperature adjustment, it can contribute to downsizing and energy conservation in tunable laser modules.