Eventos Anais de eventos
ENCIT 2016
16th Brazilian Congress of Thermal Sciences and Engineering
A HELICAL RADIAL FINS HEAT EXCHANGER PROPOSAL FOR COOLING AIR IN A PNEUMATIC SYSTEM OF A HEAVY VEHICLE
Submission Author:
Alysson Diogenes , PR
Presenter: Alysson Diogenes
doi://10.26678/ABCM.ENCIT2016.CIT2016-0003
Abstract
The present work has as theme the proposal of a heat exchanger for cooling air in a pneumatic system of a heavy vehicle. The boundary conditions of the problem were provided by physical test performed by a company that produces heavy vehicles. The heat exchanger proposed for this application has a different of the most used format in this industry; it has helical radial fins and is exposed to a transverse external flow to the internal flow. For the development was chosen a logarithmic method of temperature differences (LMTD) as the inlet and outlet temperatures of the fluid were known. With this, a mathematical model in Microsoft Excel software was developed taking into account all design parameters and calculation. To validate this mathematical model, it was compared to an experiment conducted in the fluids mechanics laboratory of Positivo University and with Computational Analysis of Fluid Dynamics (CFD). Once the results provided by the three methods were analysed, it was proposed nine solutions that would meet the requirements of the studied application. It was also suggested the best proposal based on the criteria of less use of raw materials and higher efficiency.
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