Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Theoretical-Experimental Analysis of a Finned Tube Heat Exchanger Composed of Wavy Fins Used in Thermal Systems as Condenser
Submission Author:
Cleison Henrique de Paula , MG
Co-Authors:
Cleison Henrique de Paula, Fábio de Oliveira, Luciano Neves
Presenter: Cleison Henrique de Paula
doi://10.26678/ABCM.COBEM2017.COB17-0300
Abstract
This work consisted in submitting a finned tube heat exchanger composed of wavy fins to nine test conditions in an experimental apparatus in order to determine which condition this equipment can operate with greater thermal hydraulic performance. Thus, in each test the Colburn j and Fanning friction (f) factors calculated experimentally were compared with two empirical correlations, where it was observed that these correlations did not represented with good accuracy both factors at the same time, but only one of them, where the Wang et al., 1997 correlation represented the experimental data with a maximum deviation of 17.97% for the Colburn j factor and the Kim et al., 1997 correlation represented the experimental data with a maximum deviation of 29.30% for the f factor. The thermal hydraulic performance of heat exchanger tested was evaluated using the j/f parameter, where it obtained higher performance in the 3 test condition. The mass flow rate of air passing through the device has been calculated using the nozzle plate method and the energy balance method held in the exchanger and it was observed a good approximation between the methods, where the maximum deviation was 30% and the minimum of 5%. Thus, this work contributed to projects of finned tube heat exchangers that reduce energy consumption in thermal systems.
Keywords
Heat exchanger, Thermal hydraulic perfomance, Finned coil
