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  5. Research of the radio electronic apparate heating dependence from its parameters

Research of the radio electronic apparate heating dependence from its parameters

V. Semenets, A. Sinotin, T. Kolesnikova, S. Sotnik, N. Starodubtsev
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Description: The paper discusses the issues of thermal conditions in electronic equipment. The factors that have the maximum effect on the temperature rise of parts in electronic equipment are briefly considered. The results of experimental studies, which developed a methodology for designing a radio-electronic apparatus that provides its normal thermal conditions during operation, are presented. Efficient surface cooling systems are given. Also, the paper presents the calculated ratios for determining heat transfer coefficients; heat transfer coefficient through the gas layer from the heated zone to the casing with a known heat transfer coefficient between surface of casing and environment. The dependences of initial parameter on volume of heated zone and intensity of surface heat transfer are given. The dependences of temperature value at the central point of heated zone are given: in the absence of heat sinks; in the presence of heat; with the withdrawal of heat to the housing. It was determined that for the implementation of circuit solutions, it is advisable to choose element base with the lowest power consumption and materials with high temperature resistance. An increase in the volume of heated zone due to a decrease in the density of elements contradicts placement of dimensions minimizing requirement the structure, therefore it can be applied only in the case when there are no rigid restrictions on the dimensions of the structure in the technical specification. Recommendations on the placement of fuel elements in the electronic device heated zone, choice of the element base. The influence of various design parameters on its thermal regime. The given recommendations on the calculation of temperature fields in the process of designing individual device parts, which will allow more accurate calculations of electrical and magnetic circuits, as well as open the possibility of economic justification of a particular design variant.


Keywords: heated zone, anisotropic thermal conductivity, conductive heat drains, effective thermal conductivity, heat transfer coefficient

References

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Reference:
Semenets, V.V., Sinotin, A.M., Kolesnikova, T.A., Sotnik, S.V. and Starodubtsev, N.G. (2018), “Issledovanie zavisimosti maksimalnogo peregreva radioelektronnogo apparata ot ego parametrov” [Research of the radio electronic apparate heating dependence from its parameters], Information Processing Systems, Vol. 4(155), pp. 29-34. https://doi.org/10.30748/soi.2018.155.04.