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Analog Technologies has a strong R&D team under the leadership of Dr. Gang Liu, a graduate of Wayne State University of Michigan. With innovation in mind, this R&D team designed and patented more than twelve products in the advanced analog technology fields. Backed with intensive trainings in higher education and enhanced experience, this R&D team is ready to work on your special requests.

Application prospect of thermoelectric cooling technology in temperature control of composite materials

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.

Especially with the further miniaturization of the refrigeration module structure, the adverse effects of internal contact layer resistance, heat conduction and thermal radiation will be more significant. Therefore, the thin film integrated structure with strong compatibility will become the mainstream development direction of microelectronic cooling technology.

Thus, thermoelectric cooler (TEC) with the integrated design and integration technology of aerospace vehicles in the aspects of function and structure satisfies the future development trend of thermoelectric cooling technology, especially in the application of aerospace. Based on composite materials of TEC temperature control and intelligent temperature control, the organic combination of TECs, structural materials and functional materials is a major development direction of future application of thermoelectric cooling technology.

If you have any questions and suggestions about TECs, please feel free to contact us. We will be very happy to receive your feedback.

Our web site is http://www.analogtechnologies.com/

Keywords: TEC, thermoelectric cooler, thermoelectric module

 

0 Comments | Posted in News By Fang Liu

Characteristic analysis of TEC refrigeration cycle (III)

Monday, August 31, 2015 8:32:44 PM America/Los_Angeles

From (3), (13) and (14), it is shown that when Th -Tc>△Tmax, the cooling capacity qc<0. At the same time, TEC cannot cool, but start heating, which is not allowed in practical work. So the working current should be controlled in range of I0IIsat, which can ensure the cooling capacity qc≥0. Although based on the analysis of the cooling capacity qc, the general range of working current can be determined, but in practical work, the refrigeration coefficient is still an important indicator. From (9), when the working current of TEC satisfies the following relations, the TEC can reach the maximum refrigeration coefficient βmax:

 

Where, Iopt is the working current in the condition of meeting the optimal refrigeration coefficient; Z is the figure of merit, ;.The relationship among current I, cooling capacity qc and β is shown in the figure 3. When Ish<I<0 and W<0, TEC is in the power generation mode. When I<Ish、0<I<I0 and I>Isat, the cooling capacity of TEC qc<0 and it will heat the cold load, which should be avoided as far as possible in practical work. When 0<I<Isat, the amount of heating load is small because there exists the Peltier effect reducing the impact of heat resistance in the cold end. Only when the current meetsI0<I<Isat, TEC can work normally in the cooling mode; when I=I0 or I=Isat, it cannot cool. The cooling capacity qc is a quadratic function about current I, so qc is symmetric in the two interval, I0<I<Isat and Imax<I<Isat. However, when considering that the refrigeration coefficient β increases with the current increasing in the range of I0<I<Iopt and decreases with the current increasing in the range of Iopt<I<Isat, so he refrigeration coefficient should be considered at the same time with improving cooling capacity and the working current in Imax<I<Isat is not selected in general. Obviously, TEC has two extreme ways of working, the maximum refrigeration coefficient operation mode and the maximum cooling capacity operation mode. The former is the operation mode of variable voltage and variable operating current; the latter is the operation mode of constant working voltage and working current. But in the actual work, the hot and cold end temperature of thermoelectric cooler is changing, and it generally works between the maximum refrigeration coefficient and the maximum refrigeration capacity, so the current needs to be regulatedaccording to the actual situation.

If you want to know more, please click here http://www.analogtechnologies.com/

Keywords: TEC, thermoelectric cooler

0 Comments | Posted in News By Fang Liu