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 ?
In this study, a new method has been developed to reduce color-shift through use of a peltier cooler and a modified heat sink configuration.
Wristify is a series of junctions of two different conductors, called a Peltier cooler, which is powered by a small battery and is attached to a wrist strap.
The equipment for temperature control is designed with the use of Peltier cooler.
A main camera, SBIG STL-1001E, (6) with a controllable Peltier cooler, for long exposure, high resolution imaging and photometry.
A Peltier cooler, heater, or thermoelectric heat pump is a solid-state active heat pump that transfers heat from one side of the device to the other side against the temperature gradient (from cold to hot), with consumption of electrical energy.
The ability to couple a Peltier cooler to the Stingray in order to actively control the camera temperature.
With this one step drying solution there is no need for a drip leg, peltier cooler, or desiccant canister.
Instead, a simple two-stage Peltier cooler is used without the need for additional cooling agents.
The sensors, in addition to the standard thermoelectric Peltier cooler and heated sample lines provide highly accurate measurement in critical N[O.
Several basic cooling methods lend themselves to amplifiers or other operational electronics, including passive cooling (operating in a cold environment), radiational cooling, using heat pipes to a cold sink, active cooling using liquid nitrogen refrigerant (or some other super-cooled liquid) and electrical junction cooling (a Peltier cooler or the like).
MicroSL detectors are available in a number of industry standard packages and some parts include an integrated Peltier cooler capable of reducing the detector temperature to -20ae C, further reducing the noise of the SensL SL silicon.
One way of doing this could be to reverse biasing the Peltier cooler or to use a dedicated heater.