ANALYSIS OF DIFFERENT HEAT TRANSFER AUGMENTATION CONFIGURATIONS OF HEAT EXCHANGERS FOR INDUSTRIAL WASTE HEAT RECOVERY APPLICATION

Energy Deficiency can be reduce by use of waste and available forms of energy (Non-conventional) to produce electricity or utilize them to reduce usage of other power absorbing devices as the world is facing energy crisis and as our fuel resources are depleting very fast. In Conventional Power Producing methods wasted heat can be recovered in Boiler accessories like Economizers and Air Preheaters with less effectiveness. Current work is investigation of various aspects of convective heat transfer enhancement using Pin Fins, Corrugated Tubes and Twisted Tapes. The basic methods used to enhance the heat transfer by simultaneous increase of heat transfer surface area as well as the heat transfer coefficient. The method is carried out as on combination of Pin Fins, Corrugated Tubes and Twisted Tape as elements for the heat transfer enhancement, Investigations of a double-pipe Pin Fin heat exchanger were carried out. The heat transfer and pressure drop results for the Pin Fin and Corrugated tube heat exchanger were compared with the results for a smooth-pipe heat exchanger. It was found that by a direct comparison of Nusselt number Nu and Euler number Eu, conclusion regarding the relative performances could be made. Geometric parameters are considered, Ratio of Spacing between the fins and diameter of Pin Fin and the Ratio of Corrugated Tube diameter and diameter of corrugation. Heat transfer depends on numbers of Pins and spacing between pins. In this study Heat transfer enhancement is found to be about 5-15% for Pin Fin and 6-23% for Corrugated Tube with Twisted Tape. This Improvement will effectively improvise the overall efficiency of Conventional and Non-Conventional Power Plants