Experimental characterization of an extended surface with spine-type fins and inverted V tube configuration

Abstract

The heat transfer and pressure drop results of an extended 
surface with spine-type fins and inverted V tube configuration, 
are presented in this paper.
The extended surface is composed of an aluminum tube and 
a ribbon with cuts, of the same material, that forms spinetype fins when the tube is rolled. The tube forms a coil with 
an inverted V type configuration of tubes according to the 
direction of the air flow. The experimental characterization 
of the surface was performed in a wind tunnel for an air flow 
velocity from 0.5 to 5 m / s for a constant flow of hot water 
with a temperature of 40 °C circulating inside the coil.
Based on the experimental results, the correlations for the 
calculation of heat transfer and pressure drop on the extended 
surface with spine type fins and the configuration of inverted V 
tubes were obtained. Heat transfer results were compared with 
those presented by other authors who have tested extended 
surfaces with spine type fins but with an in line configuration 
of tubes. It was found that the extended surface with spine 
type fins and inverted V type configuration of tubes showed 
a greater intensity in the heat transfer process by forced 
convection at flow speeds lower than 1 m / s.