Thermoelectric cooler is like a heat pump when it's working, transferring heat from one point to another. This is not a common heat absorption process or a magic heat consumption process. When it's powered on, one end of the TEC module will become cold while the other end hot. The cooled down end transfers the heat to the hot end, which conforms to the thermodynamics law. In order to complete a heat transfer process, the thermoelectric cooler needs to be connected to a proper heat sink, which is used to release the heat from the cold end and produced during the operation of the components.(more)
Based on the “thermoelectric effect”, a thermoelectric generator (TEG) converts heat directly into electricity. Because of no moving parts, it is very silent and highly reliable.(more)
Until 1950’s, with the rapid development of semiconductor thermoelectric mateials with good performances, the efficiency of thermoelectric effect was improved so greatly that the thermoelectric refrigeration and the thermoelectric generation entered into the field of engineering practice. When comparing with the existing compression refrigeration or absorption refrigeration, the thermoelectric cooler (TEC) depends on the heat transfered by electrons to achieve refrigeration. It has the following advantages:(more)
Although thermoelectric cooling technology has been developed very fast, there are still many problems that need resolution. Because of the material constraints, the cooling capacity of thermoelectric cooler (TEC) is limited and its cooling efficiency is too low. With the increase of the required temperature difference, the more the TEC series is, the lower the cooling efficiency is. So TEC cannot completely replace the traditional cooling technology, which can only be used in the small cooling capacity field. Only if the cooling capacity is improved, TEC can get more extensive application. The key is that better materials should be developed based on the cooling principle of TEC.(more)
In the ion conduction type conductor, the carrier may be positive ion or negative ion. In the electronic conduction type conductor, carrier is electron and current can be formed by electron movement. With the increasing of carrier concentration, thermoelectric coefficient α will reduce and thermal conductivity σ will increase. In the thermal coefficientλ, the lattice thermal conductivity λP (about 90%) is irrelevant to the carrier concentration, while the electron thermal conductivity λe is proportional to the carrier concentration. So the appropriate carrier concentration n is selected to make get the maximum difference. Figure of merit z and other three parameters α, ρ, λ have a certain relationship with carrier concentration n. When n is close to 1019cm-3, the value of Z can be the maximum.(more)
In practical application, the thermoelectric modules are often placed inside of devices, and even they can be directly combined with devices needing refrigeration into a whole. For example, in optical application, the thermoelectric module can be a part of a detector or diode; in a semiconductor device, it can become a whole with the ceramic package. This lays the foundation for developing composite materials with temperature control-structure integration or even intelligent temperature control composite materials.(more)
Based on the Peltier effect, thermoelectric cooler (TEC) is an energy conversion process, which uses electric energy as power. When the direct current is through the loop made of two different conductive materials, the endothermic phenomenon will be generated in the node, and when the current is in the opposite direction, the exothermic phenomenon will be generated.(more)
TEC (Thermo-Electric Cooler) temperature controllers have some unique and important features that other temperature controllers do not have. One of the key features of TEC controller offers is that it allows the target object reaching the set-point temperature in a short time. Let's use a 20×20×10 (mm) object as an example, driving a TEC with a TEC controller can allow the object reaching the set-point temperature within 5 seconds understand either cooling or heating mode, as the set-point temperature changes 1C. But if we drive a heater unit with a heater controller, it may take > 30 seconds to reach the same temperature under the heating mode, > 60 seconds under the cool-down mode. Another key feature of the TEC controller is that it can maintain the object temperature to be very close to the desired temperature, such as within 0.001C of set-point temperature. To summarize, these are the key features of the TEC controller:(more)
The forms of thermal conductivity silicone are grease and solid. And there are also many different kinds of materials can be competent forapplicationsof the thermal conductivity silica. When producing thermal silica, there are some factors to consider.(more)
Based on the Piltier effect, thermoelectric cooling is an energy conversion process, using electric energy as power, that is: when the direct current is through two different conductive materials, nodes will have endothermic phenomenon (when the current is in the opposite direction, exothermic phenomenon will be generated). As the Peltier effect of semiconductor materials is very obvious, the thermoelectric modules are mostly made up of semiconductor materials at home and aboard.(more)
