Thermoelectric cooler ( TEC ) is built based on Peltier effect. It is a kind of solid components, which has no pollution, high reliability, small size, rapid cooling, rapid heating and some other characteristics. It has been widely used in electronic, medicine, industry, agriculture and some other fields. However, TEC still has some problems. 1.In order to reach the equivalent cooling efficiency of mechanical compression refrigeration, the material optimal coefficient of TEC is not high, which i...(more)
During the cooling process of thermoelectric cooler ( TEC ), the dissipating effect has direct effect on the cooling performance. The bad performance of heat transfer will cause the temperature rise on hot-side, thus the cooling capacity will reduce a lot. Under certain current, heat transfer from hot side to cold side can be reduced with the decrease of temperature. Only when the heat on the hot-side is drained away in time to maintain different hot-side temperature, the cold side can continuou...(more)
Thermoelectric generator ( TEG ) is built based on Seebeck effect to convert heat directly into electricity. In the open circuit composed with two different conductors, if there is temperature difference on the two contact points of the conductor, electromotive force will come into being in this open circuit. The polarity of the output voltage depends on the polarity of the temperature difference on both ends of the TEG. If the hot end and the cold end of TEG are swapped over, the polarity of th...(more)
The MTBF for standard TECs is at least 200,000 hrs, which is based on relatively stable running conditions, with several times ON/OFF per day during operation. However, in other applications, the power is frequently on/off, especially in constant temperature controller application. There is a test for research the influence of the on/off switch cycle to the TECs in a constant temperature. Install the TEC module with silicon grease between a couple of convector radiators. The load time of the cur...(more)
Thermoelectric cooler ( TEC ) is also called semiconductor cooler, which is using an artificial cooling technology based on Peltier effect. At present, the focus of domestic and foreign researches is on the characteristic optimization of TEC itself thermoelectric materials, but there are few researches on the combined influence of TEC performance. The main integrated influence factors of TEC internal structure include geometry size of the thermoelectric arm, contact effect and so on. (1) After d...(more)
Continued from the last article. 5. Determining TEC series Selecting TEC series must meet the actual temperature difference requirements, that is, the nominal temperature difference shall be higher than the actual temperature difference, so that it can meet the requirements. However, the series is not too much because TEC price has great improvement with the increase of series. 6. Determining the specifications of TEC After selecting the series of TEC, its specifications can be determined, espec...(more)
Thermoelectric cooler ( TEC ) plays an important role in its application products. According to the characteristics, weakness and application range, the following problems should be determined when selecting TEC. 1.Determining TEC working state The size and direction of working current can determine the cooling, heating and constant temperature performance. Although cooling mode is most commonly used, cooling and constant temperature performance cannot be ignored. 2.Determining the actual temper...(more)
High reliability and long life time can be achieved when the thermal cycling times is few, the temperature change range is narrow, upper temperature limit is low, as well as that temperature change is slow. On the contrary, in a wide temperature range, high changing speed, many times cycling, it will shorten the life time of TECs largely. Its noteworthy that the absolute life time of TECs depends largely on the total cycling times, not the total time for the cycling. Different TECs will largely ...(more)
