# Eksperimentalno-teorijska analiza rashladnog sustava motora teškog vozila

Siničić, Mirko (2008) Eksperimentalno-teorijska analiza rashladnog sustava motora teškog vozila. = Experimentally-theoretical analysis of cooling system of heavy vehicle engine. Scientific master's thesis , Sveučilište u Zagrebu, Fakultet strojarstva i brodogradnje, UNSPECIFIED. Mentor: Galović, Antun.

## Abstract

In this paper it is in details described cooling system in heavy vehicle, which cools: - engine cooling liquids (in this case - water), - engine lubricating oil and - transmission lubricating oil. Approach to problem solution is carried out by measuring in ten working points of the engine. Values of flows, inlet and outlet temperatures of all liquids participating in heat exchanging are measured at stationary vehicle working conditions. For mathematical describing heat transfer W. M. Kays and A .M. London expressions are used. By means of these expressions, as well as some newer descriptions of heat transfer in boundary layer problem it is set up mathematical model for calculating of heat transfer coefficients on each fluid at every single working point of the engine. Calculated heat transfer coefficients, measured inlet temperatures and measured fluid flows at every single working point of the engine are import values for a program based on mathematical model for cross exchanger. Outlet temperatures of fluids are calculated. Set-up mathematical model is controlled by comparison of calculated and measured outlet temperatures of all fluids. In this paper is defined mathematical model which properly enough describes cooling system of considered vehicle, proven in corresponding of calculated and measured values. This verified mathematical model which describes considered vehicle's cooling system is possible to apply on other vehicles with cooling system designed by similar principles.

Item Type: Thesis (Scientific master's thesis) motor; prolaz topline; križni izmjenjivač topline; metoda konačnih razlika engine; heat exchange; cross heat exchanger; final elements method 300 Department of Thermodynamics, Thermal and Process Engineering > 310 Chair of Technical Thermodynamics 22 Sep 2014 18:00 16 Oct 2015 13:17 http://repozitorij.fsb.hr/id/eprint/600