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Characteristic analysis of TEC refrigeration cycle (I)

Time: Apr 24 2015    Click: 359

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)

Application prospect of TECs

Time: Apr 23 2015    Click: 290

With the shrinking volume of electronic component and the development of its performance and speed, the energy consumption of chips is larger and larger. The excessive temperature will make the component subjected to excessive thermal expansion stress, which can result in its structure damage or even the component burning out. Due to the uneven distribution of the chip power density, local hot spots will be generated. According to statistics, more than 55% of electronic equipment failure is due ...(more)

Manufacturing technologies for improving the performance of TECs (Ⅱ)

Time: Apr 22 2015    Click: 281

2. Checking the resistance value of elements The slant element end can result in forming a large contact resistance, and elements with internal defects can lead their resistance value to change. Before brazing, the resistance value of elements should be measured by using contact electrode. If there are abnormal components in the element, it will be removed so as to reduce the contact resistance. It can not only improve the consistency of component performance parameters but also the consistency...(more)

TEC modules-- Peltier cooler in refrigeration field

Time: Apr 21 2015    Click: 325

In recent years, with the development of thermal electric materials and the marketization of TEC modules, there is a RD upsurge of thermoelectric cooler and thermoelectric conversion devices. Traditional air conditioner and refrigerators apply freon or other compound refrigerant to realize refrigeration. The leakage of freon or other refrigerant lead to pollution of ambient environment and damage to the ozonosphere. Thermo electric cooling technology doesnt need any refrigerant. When its working...(more)

Manufacturing technologies for improving the performance of TECs (I)

Time: Apr 20 2015    Click: 326

TEC is the abbreviation of thermoelectric cooler, which is a kind of heat pumps. In the international arena, a certain effect has been achieved, in the aspects of improving electric piles manufacturing technologies, by using electric insulation heat conducting layer with metal enamel, copper cuprous oxide electric insulation heat conducting layer, compression electric pile structure and themeasures of deflector surface gold plating. However, with the miniaturization of electric piles, the manufa...(more)

NTC thermistor (III)

Time: Apr 17 2015    Click: 332

In current market, there is an active demand for high stability, high precision and high heat-resistance NTC thermistor , such as thermistor for measuring exhaust gas for automobile. The working temperature is 400-500C. For liquefied petroleum gas temperature measurement, the temperature is rather high too. Therefore, the need for high temp. thermistor is very urgent. Mn-Co-No series thermistor temperature is about 300C. In order to increase the working temperature, there are some experiments fo...(more)

Cooling characteristics of TECs

Time: Apr 17 2015    Click: 336

TEC is the abbreviation of thermoelectric cooler, which is a kind of heat pumps. It has many advantages of no sliding parts, no noise, long service lifetime, good reliability and flexible control. When supplying a power supply, TEC can be rapidly cooling, and when the current reverses, it can also be rapidly heating. Based on the above advantages, TECs have been widely used for mechanical fields and electronic fields. Here are some introductions to cooling characteristics of TECs. TEC consists o...(more)

Technical terms of NTC thermistor

Time: Apr 17 2015    Click: 353

1.Zero power resistance R T At a specified temperature, resistance value can be measured by measuring power value, which can be negligible comparing with the total error. 2. Rated zero power resistance R25 It is the designed resistance of NTC thermistor and in general, it refers to the measured resistance at the temperature of 25℃ 3. B value B is the thermal index of NTC thermistor, which is defined as the ratio of the natural number difference of zero power resistance under two temperatures an...(more)

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