Stabilization of LEDs thermal conditions by thermoelectric modules of cooling
Journal Title: Вісник Тернопільського національного технічного університету - Year 2018, Vol 90, Issue 2
Abstract
It is suggested to use the thermoelectric cooling modules (TCM) to stabilize the LED thermal mode. The thermoelectric cooling system has several advantages over other systems, such as: high reliability and absence of moving parts, compactness and low weight, low inertia and noiselessness of operation. The cooling system operates due to the temperature difference between the hot and cold TCM surfaces. The thermal mathematical model of the thermoelectric cooling system is constructed. The system of equations including the stationary heat conductivity equation, the thermogeneration equation, and the cold generating equation is solved. The temperature of the heterojunction of the LED is calculated, depending on its power, the total thermal resistance of the cooling system, the ambient temperature and the cold productivity of TCM. The analytical dependences of the temperature of the heterojunction on the current supply of TCM at various LEDs and at various values of the thermal resistance of the cooling system are obtained. With the given thermal power of LED and the thermal resistance of the cooling system, an optimal value of the TCM supply current is found, in which the temperature of the heterojunction of the LED reaches its minimum. At current value that is close to the optimal, the thermoelectric cooling system allows to achieve lower value of the temperature of the heterojunction in comparison with the traditional one. It has been shown that the use of TCM makes it possible to reduce the temperature of the heterojunction of the LED to the values that are lower than the ambient temperature. This is especially actual under the condition of the temperature of the medium is close to the critical temperature of the heterojunction. It has been shown that the efficiency of using the TCM decreases with the increasing of LED power, ambient temperature and total thermal resistance of the cooling system. When analyzing the efficiency of the cooling system, it should be guided not only by the parameters of the TCM, but also by the parameters of the entire LED cooling system as a whole.
Authors and Affiliations
Volodymyr Zakordonets, Natalija Kutuzova
Keywords
Related Articles
- EP ID EP373099
- DOI 10.33108/visnyk_tntu2018.02.133
- Views 65
- Downloads 0
Usage of special finite elements for solution of fracture mechanics problems
The paper suggests the usage of special modified finite elements, which account for the square-root singularity of stress and strain fields at the crack top and allows high-precision evaluation of stress intensity factor...
Selecting cutting modes for high-speed titanium-tungsten instruments at cutting pneumatic tires
Results of experimental researches of technical processes of used pneumatic automobile tires utilization are given to determine the most effective cutting tool’s material and cutting mode during their cutting in half.
Low-cycle strength of damaged T-joint
Stress-strain state and low-fatigue strength of full-scale sample of T-joint with artificial volumetric surface defects under hydraulic inner pressure loading as well as mechanical, cyclic and structural features of mate...
Mathematical modeling of interaction of H-polarized electromagnetic wave with a system of thin penetrable inclusions
Using the method of integral equations the mathematical model of interwork between the electromagnetic field of H-polarized plane wave and the system of thin dielectric or little conducting cylindrical embedding has been...
Simulation of epoxicomposites structures optical characteristics with operator transformations parameters
The theoretical and practical problem of composite materials and coatings creating with improved performance by studying the band structure of the interphase interactions during the curing epoxycomposites was considered....