An IC engine built to generate power on the basis of constant volume combustion cycle is tested for its performance and the following data were noted. Time taken for 30 cc consumption of fuel by engine=50 seconds, Number of cylinders=1, Mean effective pressure=13 bar, Brake load on dynamometer=6kg, Brake drum radius=22 cm, Engine speed =2308 rpm, Stroke volume = 800 cc, Calorific value of fuel=44000kJ/kg, Specific gravity of fuel=0.7, Density of 3 standard fluid=1000kg/m , IP=40kW. a) Find if the engine used is a 2-stroke engine or 4-stroke engine? b) What is the percentage conversion of combustion heat to useful output power? c) What percent of the power generated inside the cylinder is transmitted as useful power output?
An IC engine built to generate power on the basis of constant volume combustion cycle is tested for its performance and the following data were noted. Time taken for 30 cc consumption of fuel by engine=50 seconds, Number of cylinders=1, Mean effective pressure=13 bar, Brake load on dynamometer=6kg, Brake drum radius=22 cm, Engine speed =2308 rpm, Stroke volume = 800 cc, Calorific value of fuel=44000kJ/kg, Specific gravity of fuel=0.7, Density of
3
standard fluid=1000kg/m , IP=40kW.
a) Find if the engine used is a 2-stroke engine or 4-stroke engine?
b) What is the percentage conversion of combustion heat to useful output power?
c) What percent of the power generated inside the cylinder is transmitted as useful power output?
d) If the swept volume is increased by 10%, what would be the change in power generated
inside the cylinder if the engine speed and mean effective pressure is assumed to remain the same as before?
Step by step
Solved in 5 steps with 8 images
