question archive 3) Diesel engine A four-stroke-engine operating on the Diesel cycle draws air at 1
3) Diesel engine A four-stroke-engine operating on the Diesel cycle draws air at 1
Subject:Mechanical EngineeringPrice: Bought3
3) Diesel engine
A four-stroke-engine operating on the Diesel cycle draws air at 1.1bar, 27°C. The working cycle consists of the following reversible processes:
1-2 Adiabatic compression of air with compression ratio 14.84
2-3 Isobaric heating, heat added per unit mass: q23 = 1087.9 kJ/kg
3-4 Adiabatic expansion
4-1 Isochoric cooling
Consider the working fluid to be air, as ideal gas with R = 0.287 kJ/kgK , and variable specific heats.
a) Draw p-v- and T-s-diagram for the cycle.
b) Make a list with temperature, pressure, specific volume at the four corner points of the cycle.
c) Determine net work and thermal efficiency of the cycle.
d) The engine runs at 2500 rpm and the engine delivers 28.75 kW. Determine the mass in the cylinders, and the swept volume.
