A for cylinder engine running at 1200rpm delivers 20kW. The average t...
Average BP for 3 cylinder
Average IP with one cylinder
Fuel consumption
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A for cylinder engine running at 1200rpm delivers 20kW. The average t...
Average BP for 3 cylinder
Average IP with one cylinder
Fuel consumption
A for cylinder engine running at 1200rpm delivers 20kW. The average t...
To find the mass of fuel consumption, we need to follow these steps:
1. Calculate the total power output of the engine:
- Given: Power output = 20 kW
- Since it is a 4-cylinder engine, the total power output will be 4 times the power output of one cylinder.
- Total power output = 4 * 20 kW = 80 kW
2. Calculate the torque of the engine:
- Given: Average torque with one cylinder cut = 110 Nm
- Since the power output of the engine is given in kilowatts and the torque is given in Newton-meters, we need to convert them.
- Power (P) = Torque (T) * Angular velocity (ω)
- Angular velocity (ω) = 2π * (RPM / 60)
- Convert 1200 RPM to radians per second: ω = 2π * (1200 / 60) = 40π rad/s
- Convert 20 kW to Watts: P = 20 kW * 1000 = 20000 W
- Torque (T) = P / ω = 20000 W / (40π rad/s) ≈ 159.155 Nm
- Since the average torque with one cylinder cut is 110 Nm, it means that the torque of one cylinder is 159.155 Nm - 110 Nm = 49.155 Nm
3. Calculate the fuel consumption rate:
- Given: Calorific value of fuel = 43 MJ/kg
- Given: Fuel consumption rate = 360 g/kWh
- Convert 20 kW to kWh: Power (P) = 20 kW * (1 h / 3600 s) = 0.00556 kWh
- Convert fuel consumption rate to kg/s: Fuel consumption rate = 360 g/kWh * (1 kg / 1000 g) * (1 h / 3600 s) = 0.0001 kg/s
4. Calculate the mass of fuel consumption:
- Since the engine is a 4-cylinder engine, the fuel consumption rate will be 4 times the fuel consumption rate of one cylinder.
- Mass of fuel consumption = 4 * 0.0001 kg/s = 0.0004 kg/s = 2 * 10^-3 kg/s
Therefore, the correct answer is option 'B', which is 2 * 10^-3 kg/s.