13.01.2022

a) Explain the reason why the boiling point temperature ranges of diesel and biodiesel fuels are different. Indicate these differences. Effect of temperature on combustion b) In a diesel engine operated with biodiesel fuel, NOx emissions are higher than diesel. Why? What is the difference between the RON value of the fuel and the MON value? Also. AKI (c)

What does it mean? Please explain briefly. Which of the above RON, MON and AKI values is the value specified at the stations in our country? Question 2: `At 25 C at relative humidity, 1 bar pressure, the air is heated at constant pressure to 0 relative humidity.

According to this;

a. Its temperature in the last honey, b. Find the mass of water and air in 1 kg of moist air. As a result of the elemental analysis of a fuel, carbon 42 kg, hydrogen 5 kg, water 27 kg, oxygen in 100 kg of fuel.

Question 3:

16 kg and ash 10 kg were obtained. The molar mass of the ash can be taken as 10 kg/kmol. As it is known that as a result of the complete combustion of this fuel with air, the mole ratio of oxygen in the smoke gases is 8%; a. The closed formula of the fuel, b. Air excess coefficient, c. Calculate the reaction equation and the mass of air used to burn 1 kg of fuel

Question 4:

Propane gas (C3Hs) reacts with excessively dry air in a continuous flow adiabatic combustion chamber at 25 C and 1 bar constant pressure. As a result of combustion, the carbon in the fuel reacts as carbon monoxide. Since other products are converted into complete combustion products;

a. Write the reaction equation.

b. Estimate the flue gas temperature, c. Calculate the incomplete combustion loss and combustion efficiency.

Question 5:

Hydrogen gas (H) reacts with % excess air to form water. Fuel and air 25 C

It reacts in adiabatic conditions in the continuous combustion chamber at a constant pressure of 2 bar at temperature. Since it is known that there is 5% unburned H in the combustion products as a product of incomplete combustion; a. Find the reaction equation. b. Calculate the incomplete combustion loss.