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The performances and characteristics of TEG (Ⅱ)

Time: 2015-04-30 15:52:22    Click: 157

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: 209

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: 218

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)

Thermoelectric Modules-TEC Modules (II)

Time: 2015-04-29 14:10:27    Click: 295

The thermodynamic law can be applied to both TEC modules and traditional mechanical cooler. In mechanical cooling unit, use compressor to increase the liquid pressure, which enable the cryogen to circulate in the system. Then, the cryogen curs in the frozen area and then the temperature of the frozen area is reduced when the cryogen absorbs the heat during sublimation process. The heat absorbed by the cryogen is transferred to the compressor and then to the ambient environment through cryogen co...(more)

Thermoelectric Modules-TEC Modules

Time: 2015-04-28 11:16:55    Click: 197

TEC modules, also called Peltier cooler, is a compact electronic components based on semiconductor materials. When injecting a DC current in the two ends of peltier cooler, the heat will be transfer from one side of the component to the other side. Its worth mentioning that with the current direction change, the heat flow direction will be changed. Therefore, both cooling and heating can be achieved in a TEC module, which can be used to control temperature with precision. Lets take a single stag...(more)

Thermoelectric cooler dynamic cooling model analysis

Time: 2015-04-27 11:16:59    Click: 263

During cooling process, thermoelectric cooler ( TEC module ) has dynamic changes in its current, voltage, and temperatures in hot and cold ends, so its performance changes dynamically too. The research on dynamic cooling effect of TEC is good to improve the operating performances of these devices. Traditional static concentrated parameter analysis cannot tell accurately the system state change, while dynamic analysis can reflect all the state changes of the components in the system. Based on dyn...(more)

Characteristic analysis of TEC refrigeration cycle (II)

Time: 2015-04-24 17:04:46    Click: 170

The working voltage and current of TEC can be regulated. In the actual working conditions, its cooling capacity, input power and refrigeration coefficient also change with the working voltage and current. According to the current change, the following is about the analysis of cooling capacity and refrigeration coefficient. When a TEC is short circuit and input power W is zero, the current is not zero, defined as I sh : Similarly, when a TEC is open and the cooling capacity q c is zero, the curre...(more)

Characteristic analysis of TEC refrigeration cycle (I)

Time: 2015-04-24 09:50:27    Click: 233

When thermoelectric module is in the cooling mode, the heat of cooled device transfers into the cold end of TEC and then based on thermoelectric effect, the heat is dissipated by the heat sink. According to the first law of thermodynamics, the cooling capacity is equal to the Peltire effect with heat conduction from the heat flow analysis of the single couple of TEC cold end: Fig.1 Schematic of single thermocouple Where, q c is heat flow, P, N = P - N ; the first item of (1) right side is Peltir...(more)

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