Enhancement in Heat Transfer Rate of Plate Fin Heat Exchanger using Triangular Winglets

Abstract

Abstract

Heat transfer enhancement in heat exchanger leads to higher saving in terms of manufacturing and operational costs. However, parameter pertaining to pressure drops needs to be effectively analyzed so as to make a balance between pressure drop and effectiveness against the operation costs. This paper focuses on the use of triangular winglets in plate fin heat exchangers to enhance the rate of heat transfer. An obstacle is provided in the relevant fluid flow channel so as to generate a pressure difference between top side and bottom side of the channel henceforth, creating a secondary flow in transverse plane to the primary flow. This effect causes flow turbulence ultimately leading to a higher heat transfer rate. The enhancement in heat transfer rate is calculated using Nusselt number and bulk mean fluid temperature. The secondary flow pattern is plotted which indicates the formation of turbulence. However, on the contrary the pumping power is to be increased to pay off blockage of the primary flow. Moderate increase in pumping power can be justified with the increase of heat transfer rate and reduction in manufacturing and initial cost of heat exchanger because of size reduction.

Keywords: Plate fin heat exchangers, Triangular Winglets, Heat transfer Rate

Cite this Article

Jiten Makadia, Nirav Meghpara, Sanket Pandya. Enhancement in heat transfer rate of plate fin heat exchanger using triangular winglets. Journal of Thermal Engineering and Applications. 2018; 5(1): 6–11p.