HEAT TRANSFER ENHANCEMENT IN SUPER HEATER TUBE USING GEOMETRIC MODIFICATION

Abstract

Super heater Tubes are made up of ASTM SA213 T22 Material at Thermal Power Station, sikka. For heat transfer enhancement, geometric model of tube is being prepared and imported in ANSYS. Convective film coefficients for steam and flue gases have been computed from given boundary condition. After that, by keeping thickness 8mm constant and varying outer and inner diameter, three models were prepared and analyzed. For sake of convenience only partial tube was taken for analysis. From simulation results, heat flow can be calculated for all models. As heat flow through pipe increases, temperature gain for steam increases. For one of the model, heat flow value increases from original value. Using those geometric parameters, Geometric model of whole tube was made and analyzed. From results, it was found that temperature of steam has increased as compare to original temperature of steam. So that heat transfer enhancement is done by geometric modification