Rediseño del disipador de calor del motor del bus articulado Mercedes Benz 0500, empleando software de simulación CFD

Abstract

City service buses have some inherent characteristics such as low speed, high load, and rejection of useful work, this means high temperature of the surrounding air in the engine compartment, in addition this could cause overheating damage to the IC engine. So, engineering tries to give improvements in the maintenance, control, and care of the motors, since they are the heart of the machine. In this way, the objective of the study is to improve the way of dissipating the heat of the articulated bus motor Mb O500 of the city of Quito, through fluid dynamics (CFD), which is a CAE tool that allows to visualize, evaluate, and improve the designs of fluids and heat transfer, which are experimentally difficult to analyze. The study begins with the sample of the current temperature of the engine and the passenger compartment measured by sensors and Datalogger. A simplified CAD model of the passenger compartment is then analyzed with all the elements that make up the engine. Afterwards, the CFD simulations are carried out with the parameters obtained and measured, with this the air flow is shown, as well as its heat dissipation. Finally, it is simulated with a new design scheme for cooling the engine compartment. Then, the results are carried out in the ANSYS FLUENT module which shows the fluid path, the air speed, and the temperatures, finally the designs are compared. In short, the present work presents a study of efficiency and improvement of temperatures in the passenger compartment to avoid overheating in the engines of the Mercedes Benz 0500 articulated buses.