Calibration and Experimental Investigation of Heat Transfer between Engine Compartment and Passenger Cabin

Abstract

Vehiclescabin temperature arising from inside the engine compartment and transferringthrough the wall in between is a factor to passenger comfort has got less technical attention. This requires reducing the heat transferring and maintaining the cabin temperature while adjusting the temperature source compartment also minimize the air-conditioning energy consumption in parallel. The target of this work wasrather than searching for the solution that already createdthe problem, it is better to solve from the root cause by, reducing the heat transfer from the engine through any possible way. Activities included are selecting, developing new insulation systemsand experimentingwith models considering commercial buses. An insulation system with an air gap in-between with heat rejection principlewas then developed and analyzed through its artificial experimental setup. Then the developedmodel shows better performance of 80.84 % in reducing the heat transfer to passenger space and reducing engine compartment inside space temperature by 11.6 % when compared with the other two (2)most common types of insulation. Maintained and comfortable passenger space and adjusted engine compartment temperature in parallelas a vice versa effect due to the new wall design was obtained.