Question: An eight cylinder turbocharged teftercooled four-stroke cycle diesel engine operates with an inlet pressure of 1.8atm at its maximum rated power at 2000 RPM. Bore and stroke of the engines are 128mm and 140mm respectively, and volumetric efficiency based on inlet manifold conditions of 1.8atm and 325K after the aftercooler is 90% The compressor isentropic efficiency is 70% calculate: a) The power required to drive the turbocharger compressor, [kW](c)aot=3? b) The pressure at the turbine inlet if the exhaust gas temperature is 923K and the turbocahrger isentropic efficiency is 65%, and the turbine exhaust to the atmosphere, [atm] c) The amount of after cooling energy needed, [kW] d) The overall efficiency of the turbocharger, [\%] Asuume: a fuel-air ratio of .035 and the following properties: Cpair=1.005 kJ/kgKVair=1.4;Cp,as=1.25kJ/kgK;Vgas=1.31; Ambient conditions T=25C and P=1atm