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Тechnology

Thermoelectric cooler (TEC) construction

The first thermoelectric phenomenon was discovered by French physicist and meteorologist Jean Peltier (1785-1845). The basic idea behind the Peltier effect is that whenever DC passes through the circuit of heterogeneous conductors, heat is either released or absorbed at the conductors' junctions, which depends on the current polarity. The amount of heat is proportional to the current that passes through conductors.

As a result of works performed by Russian academician A.F. Ioffe and his colleagues the semiconducting alloys were synthesized allowing to apply this effect in practice and to begin the full-scale production of thermoelectric refrigerating devices for wide use in various fields of human activities.

thermoelectric, Peltier cooler The basic thermoelectric (Peltier) cooler  unit is a thermocouple, which consists of a p-type and n-type semiconductor elements, or pellets. Copper commutation tabs are used to interconnect pellets that are traditionally made of Bismuth Telluride-based alloy.

Thus, a typical thermoelectric cooler (TEC) consists of thermocouples connected electrically in series and sandwiched between two Alumina ceramic plates. The number of thermocouples may vary greatly - from several elements to hundred of units. This allows to construct a TEC of a desirable cooling capacity ranging from fractions of Watts to hundreds of Watts.

When DC moves across Peltier cooler, it causes temperature differential between TEC sides. As a result, one thermoelectric cooler face, which is called cold, will be cooled while its opposite face, which is called hot, simultaneously is heated. If the heat generated on the TEC hot side is effectively dissipated into heat sinks and further into the surrounding environment, then the temperature on the thermoelectric cooler cold side will be much lower than that of the ambient by dozens of degrees. The thermoelectric coolers cooling capacity is proportional to the current passing through it. TEC's cold side will consequently be heated and its hot side will be cooled once the TEC's polarity has been reversed.

Kryotherm single-stage thermoelectric coolers permit to obtain the temperature difference up to 74-76K. To obtain lower temperatures multistage TEC's are used. For example, maximum temperature difference of one of the serial Kryotherm four-stage TEC's is 140K.

thermoelectric, Peltier cooler

thermoelectric, Peltier cooler

thermoelectric, Peltier cooler

RECOMMENDATIONS While you are choosing thermoelectric device, we kindly ask you to read carefully the product manual and recommendations for its usage. This is a necessary requirement for long-term and effective use of our products.

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SHIPPING Shipping cost is determined at the stage of registration of the order in the basket Shipping cost is calculated according to the UPS tariffs for region delivery. All taxes and fees are included in the delivery price, except in the estimated costs of customs clearance upon receipt in your area.

WARRANTY The warranty period is 12 months from the start of the operation, but not more than 18 months from date of shipment. The average life of the thermoelectric modules is at least 10 years, subject to the conditions of installation and operation. Guarantees do not apply to products that fail due to violations of the conditions of storage, transport, unpacking, assembly and operation.

Order product that is out of stock

ATTENTION All foreign orders are required custom clearance which is leading to additional costs. The exact size of these costs can be known only after delivery of the products. For more information please contact your regional branch of UPS.

HOW TO ORDER You can order any product that is represented on the site by filling in the feedback form, sending us an e-mail or via telephone +78123398997.

PAYMENT 100% prepayment is a necessary requirement for shipping our products. You should make payment in accordance with the conditions in the invoice. For regular customers the delivery with deferred payment is possible.

TERMS The delivery terms will be from 6 to 12 weeks depending on the quantity (minimum order of 100 pieces) and additional options of required product. If required products are currently in stock, your order will be ready for shipping within no more than 10 working days after we will receive your payment to our account.

SHIPPING Shipping cost is determined at the stage of registration of the order in the basket Shipping cost is calculated according to the UPS tariffs for region delivery. All taxes and fees are included in the delivery price, except in the estimated costs of customs clearance upon receipt in your area.

WARRANTY The warranty period is 12 months from the start of the operation, but not more than 18 months from date of shipment. The average life of the thermoelectric modules is at least 10 years, subject to the conditions of installation and operation. Guarantees do not apply to products that fail due to violations of the conditions of storage, transport, unpacking, assembly and operation.