Question

Двигатель мотороллера,развивающий механическую мощность 5кВт,потребляет за 2 часа работы 4 кг бензина.определить КПД этого двигателя

Answer 1

Η=$\frac{P*t}{q*m}$=$\frac{5000*7200}{4*44*10^{6}} =0,205 =>$η=20,5%

Answer 2

Calculation of Efficiency (КПД) of the Motor Scooter Engine

To determine the efficiency (КПД) of the motor scooter engine, we need to use the formula:

КПД = (Mechanical Power Output / Fuel Power Input) x 100%

Given information: - Mechanical power output = 5 kW - Fuel consumption = 4 kg

To calculate the fuel power input, we need to know the calorific value of the fuel used. Unfortunately, the provided search results do not contain the necessary information to determine the calorific value of the fuel.

Without the calorific value of the fuel, it is not possible to calculate the efficiency (КПД) of the motor scooter engine accurately. The calorific value is required to convert the mass of fuel consumed into the energy content of the fuel.

If you can provide the calorific value of the fuel used, I would be happy to assist you further in calculating the efficiency of the engine.