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)
It can be seen as the reliability test for TECs to make continuous thermal cycling to TECs in a wide temperature rang. Especially temperature of TECs in this process rises to very high. Compared with most applications, this process will cause higher failure rate. Most of failures are rooted in unmatched thermal expansion coefficients of thermal materials and other components. This is inevitable. It performs as initial failure, but sometimes, performance degeneration will be observed before failu...(more)
Thermoelectric coolers ( TECs ) are built based on Peltier effect, which can both heat and cool depending on the direction of input DC current. Because of having no noise, no vibration, no refrigerant, light weight, compact size and some other advantages, TEC has been widely used for cooling certain components in electronic devices and radio communication equipment. There are some operating instructions that you should know before using TEC. Correct installation and usage 1.One side of TEC is mo...(more)
Thermoelectric cooler ( TEC ) is based on Peltier effect, which can both cool and heat. According to changing the polarity of direct current, the same TEC can realize cooling or heating. This effect is achieved by the principle of thermoelectric. In principle, TEC just plays a role of a heat transfer tool. Physical picture of TEC There are advantages as follows: 1.There is no need of any refrigerant and it can work continuously. 2.TEC has two functions, cooling and heating. In general, the cooli...(more)
In the installation process, its necessary to avoid wrong installation, which makes influence to the TEC modules . There are the following points that may affect the reliability of the TEC modules during the installation: a) TECs have high mechanical strength under pressure, but they have a small shear strength. Accordingly, TECs cannot be placed in a mechanical system that plays a main supporting role. Moreover, in the applications that may involves shocking and impact, its better to install th...(more)
