PREDICTION OF TEMPERATURE VARIATIONS FOR INDUSTRIAL BUS DUCT SYSTEM UNDER FORCED CONVECTION COOLING WITH VARIOUS ASPECT RATIOS USING MATLAB

This paper presents an experimental and mathematical model of the heat transfer processes in an electric bus duct system. Factors affecting the thermal model of the bus bar are current carrying capacity of the bus bar, step changes of the electric load and cross selection area of the bus bar [1]. In this study the variation in aspect ratio is accomplished by varying the width of the rectangular busbar having a constant thickness of 6mm. The aspect ratio (a1-a5) has been selected in the range from 5 to 25[2]. Proximity and skin effect are much controlled which leads to the reduction of power consumption through thermal and electrical loading on electrical bus duct system [3]. An algorithm has been developed to predict and compare the sizes of the busbar with materials like copper and aluminium using MATLAB [4][5].It has been found that the forced convection along with perpendicular air flow reduces the power loss due to heat generation is also reduced in the bus bar conductor [6][7]. It is concluded that same ampacity level and variation of steady state temperature at different air velocity from 1 to 10 m/s and variation in aspect ratio of Copper and Aluminium busbar are predicted within the allowable temperature rise [8][9].The obtained results show that a variation in aspect ratio produces very satisfactory agreement between computed and experimental data.