THE EFFECT OF TURBOCHARGER PRESSURE AND INTERCOOLER TEMPERATURE ON ENGINE PERFORMANCE

Abstract

Due to serious air pollution problem caused by engine emissions such as carbon monoxide CO, un-burnt Hydrocarbon HC, Oxides of Nitrogen NOx, and solid particulate matter C (Soot), and the increase of oil prices, steps must be taken to reduce pollution, and reduce fuel qualitative discharge, especially in combustion engines. To improve the efficiency and reduce the emissions of Diesel engines, some of the exhaust gases heat could be recovered and utilized to improve the efficiency of the engines. In this paper, a simulation has been developed to study the effect of the turbocharger pressure and the inter-cooler temperature on the engine performance. FORTRAN language was applied for this study based on "Internal Combustion Engine Applied Thermodynamics" by C.R. FERGUSON. Results show that, the engine performance is significantly affected by the turbocharger pressure and the inter-cooler temperature, by increasing the Turbocharger pressure and decreasing the inter-cooler temperature the engine power output is strongly improved and the specific fuel consumption of the engine is reduced. By applying the present  code  to  a  medium  four-stroke  MAN  Diesel  and  Turbo-engine,  the  thermal efficiency is raised to over 47% and the specific fuel consumptions can be as low as 126 g/kWh at turbocharger pressure of 0.25 MPa and inter-cooler temperature of 325 K, compared to the results without turbocharger system where the thermal efficiency was 44% and the specific fuel consumption was 132 g/kWh