ABSTRACT This master thesis report describes the behavior of a cooling system based on the power consumption and power losses during the velocity range. The thesis is a report of the behavior of the cooling system to understand were we having more needs to cold down the system. It was used a excel sheet to describe the values of power, losses and efficiencies of the various components of the cooling. With the excel sheets built we studied various cases in the system to show the points more important to take care with the cooling system. Continuing the study, it was showed the power consumptions of the cooling system and also the heat dissipation capacity. The objective included in this thesis is to show that in the regular cooling systems the use of the engine's velocity to move the fan and the coolant pump is not the best choice. Could be currently the less expensive one,but not the best one. This thesis didn’t have the objective to find a solution for a perfect cooling system, but a good report of the problems of the actual cooling systems and where we should spend more time to improve them. This is just a preparatory work for a new work.

Dissertação de Mestrado em Engenharia Mecânica apresentada à Faculdade de Ciências e Tecnologia da Universidade de Coimbra