Assuming a compression ignition engine having a cut-off ratio of 2 and a compression ratio of 20. Before the compression stroke, air is at 100kPa, 20°C and a volume of 500 cm³. Determine (in kPa) the mean effective pressure of the cycle

1. A six-cylinder, four stroke, 3.2-L compression ignition engine operate on the diesel cycle with a compression ratio of 19. The air is at 95 kPa and 67°C at the beginning of the compression process and the engine speed is 1750 rpm. The engine uses light diesel fuel with heating value of 42,500 kJ/kg, an air-fuel ratio of 28 and a combustion efficiency of 98%. Using the constant specific heats at 850K determine the following: a) Maximum temperature b) Work net, Wnet c) Net Power output (kW) d) Specific fuel consumption in g/kWh, defined as the ratio of the mass of the fuel consumed to the net work output produced. *Constant specific heats at 850K: k=1.349, cp=1.110 kJ/kg-K, cv=0.823 kJ/kg-K, R=0.287 kJ/kg-K

16-16M Consider an air-standard Otto cycle that has a compression ratio of 8.3 and a heat addition of 1456 kJ/kg of air. If the pressure and temperature at the beginning of the compression process are 0.95 bar and 7°C, determine (a) the maximum pressure and temperature for the cycle, (b) the thermal efficiency, and (c) the mean effective pressure, on the basis of Table A-SM. 16 11 nir stand

X=5