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The advantages and applications of thermoelectric cooling technology

Time: 2015-05-07 15:49:18    Click: 222

Until 1950s, 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 followin...(more)

The performances and characteristics of TEG (I)

Time: 2015-05-06 16:08:06    Click: 299

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. 1 The classification of TEG According to the hot end temperature of TEG , it can be divided into three categories: high temperature TEG (more than 700℃), medium temperature TEG (between 400 and 700℃) and low temperature TEG (under 400℃). According to the usage heat source, there are four types of TEG: 1) radio isotop...(more)

Heat Sink in Thermoelectric Cooling System

Time: 2015-05-06 16:07:35    Click: 464

Thermoelectric cooler is like a heat pump when its working, transferring heat from one point to another. This is not a common heat absorption process or a magic heat consumption process. When its 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 u...(more)

Research progress of thermoelectric refrigeration technology from thermoelectric material point of vi

Time: 2015-05-06 16:06:37    Click: 195

The material figure of merit Z is an important parameter to measure the cooling capacity of TEC and its expression is . In order to improve Z value, conductivity and Seebeck coefficient should be improved and thermal conductivity should be reduced. consists of phonon thermal conductivity p (about 90%) and electronic conductivity e. These three parameters are not independent of each other, which all are the function of carrier concentration n and temperature T. In the condition of different envir...(more)

Research progress of thermoelectric refrigeration technology from thermoelectric material point of vi

Time: 2015-05-06 15:27:22    Click: 140

Low dimensional thermoelectric (0~3D) material is a new research in recent years. Because of the function of the quantum well and quantum wire, low dimensional material has extraordinary thermoelectric property. The low dimension can increase and phonon boundary scattering of the potential well surface. Terry M Tritt obtained the different dimension curve of Bi 2 Te 3 with the change of quantum welldW(quantum wire thickness). The result shows that three dimensional material do not change with th...(more)

The performances and characteristics of TEG (Ⅱ)

Time: 2015-04-30 15:52:22    Click: 155

3 Thermoelectric materials In the view of the research and development of thermoelectric materials, lead telluride is used as a thermoelectric material in the early days, and then TAGS alloy is developed for P-type element (N-type is still PbTe). The temperature of the hot end can be up to 600℃. After using new thermoelectric materials in hundred watt thermoelectric generator and universal thermoelectric generator, the hot end temperature can reach 1000℃ and its mechanical properties and oxid...(more)

Characteristic analysis of TEC refrigeration cycle (III)

Time: 2015-04-30 15:42:11    Click: 206

From (3), (13) and (14), it is shown that when T h - T c △ T max , the cooling capacity q c 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 I 0 I I sat , which can ensure the cooling capacity q c 0. Although based on the analysis of the cooling capacity q c , the general range of working current can be determined, but in practical work, the refrigeration coefficient is still an important ind...(more)

Thermoelectric Modules-TEC Modules (III)

Time: 2015-04-30 10:39:34    Click: 211

In actual applications, thermoelectric cooler includes two or more couples of semiconductor galvanic arms. Put electric and heat conductive inducer in series to make a single component. A TEC module is made up of one or multiple such single component in series from the view of current path, and in parallel from the view of heat path. The single component and inducer is generally installed between the two ceramic plates, which are used to connect all the parts mechanically, and keep every single ...(more)

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