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)
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)
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)
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)
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)
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)
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)
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)
