Mathematical model of radio-electronic apparatus cooling system with fusion-type thermal storage accumulators and additional air-cooled heat sink

UDC 681.382

Mathematical model of radio-electronic apparatus cooling system with fusion-type thermal storage accumulators and additional air-cooled heat sink

Ismailov T. A., Evdulov О. V., Evdulov D. V., GABITOV I. A.


Abstract
The article describes mathematical model for heat exchange in cooling system for REA (radio-electronic apparatus). The cooling system uses fusion-type thermal storage accumulators and additional air-cooled heat sink. Due to additional air-cooled heat sink the cooling system allows the time of thermal storage accumulator solidification to be reduced greatly. Main calculations and their results are given. The dependence between working medium melting time (solidification) and REA element power (air-cooled heat sink) is shown. Working medium phase transition simulation is made by the solution of Stefan problem using L.Leybenson method. The system of differential equations for working medium melting and solidification processes with/without convection currents in liquid phase have been received. The calculation of heat sink is made on the basis of formulae for convective heat transfer from smooth and finned surface. 

Keywords: melting material, phase transition, cooling system, REA element, heat exchange, mathematical model


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