Eventos Anais de eventos
COBEM 2019
25th International Congress of Mechanical Engineering
Heat transfer correlation for an engine cooling radiator
Submission Author:
Cyro Albuquerque Neto , SP , Brazil
Co-Authors:
João Paulo Schiavon Ieno, Kaue Rodrigues, Luis Novazzi, Cyro Albuquerque Neto
Presenter: João Paulo Schiavon Ieno
doi://10.26678/ABCM.COBEM2019.COB2019-0736
Abstract
In internal combustion engines, fuel energy is partially converted to work and heat needs to be rejected to the environment. Radiators are compact heat exchangers designed to reject this heat in automotive applications. This work aimed to study the thermal behavior of a small scale radiator in steady state. An experimental bench was assembled with the radiator fit inside a wind tunnel. Air flow in the tunnel was adjusted by a fan and hot water was used as a heat source. It was electrically heated in a tank, pumped to the radiator and then went back to the tank, in a closed circuit. The experiments were carried out with constant water flow, whereas air velocity was varied with the fan. The heating power load was also varied in function of the number of electric heaters turned on inside the water tank. Water inlet and outlet temperatures were measured with thermocouples and air temperature was evaluated by using a grid of thermocouples in the wind tunnel. The overall heat transfer coefficient indicated the important influence of frontal air velocity on heat exchange. A dimensionless correlation for air heat transfer coefficient, based on Nusselt number, was suggested.
Keywords
Radiator, Heat exchanger, Heat transfer
