Chapter 7, Problem 7.44CU

Fuel and Combination Problem. Please solve ellaborately and include the Units. Your work will be appreciated much Dear.

Given the Volumetric Analysis of a Natural Gas:      CH4              = 80.10%                Nitrogen        = 7.40%      C2H6             = 10.70%                CO2              = 1.80%   Calculate:  A/F ratio considering incomplete combustion where CO = 10% CO2PLSS SOLVE IT

A gaseous fuel was reported to have the following volumetric analysis: CH. 84.1 % C,H. - 6.7 % CO- 0,8 % 8.4 % Find the Lower Heating Value of the fuel, in kg fuel kj O LHV = 46,043 kg air O LHV = 48,043- kg air k] O LHV = 50,043- kg air O LHV = 52,043 kg air 1 Next 25°C Light rail 6. 4. 2.

The reactant side has the following volumetric analysis for fuels burned simultaneously: CH,= 68% and C,H6= 32%. Assume a complete combustion with 15% excess air at 101.325 kPa, what is the partial pressure of water vapor in kPa. 23.12 O 25.34 O 27.57 O 29.72 None of the choices

None

1. Determine the theoretical weight of air needed in kgair/kgfuel if the fuel used has 40.3°API. 2. A petrol has the following analysis: 85.5% carbon, 14.4% hydrogen, and 0.10% sulfur. Calculate the volume of air in m³ at 1.0 bar and 15°C required for perfect combustion of 1 kg of the fuel. 3. A typical industrial fuel oil, C16H32, is burned with 20% excess air. Calculate the actual weight of air in kgair/sec needed for 3.2 kg per sec of fuel. 4. A logging firm in Isabela operates a Diesel Electric plant to supply its electric energy requirements. During a 24-hour period, the plant consumed 350 gallons of fuel at 80 deg.F and produces 2700 kW-hrs. Industrial fuel used is 30°API and was purchased at P3.00 per liter at 60 deg.F. Determine the overall efficiency of the plant. 5. A diesel engine consumed 945 liters of fuel per day at 30°C. If the fuel was purchased at 15.5°C and 30°API at Php5.00/liter, determine the cost of fuel to operate the engine per day

Hexane fuel of formula C6H14, was burned in 40% excess air. If the products of combustion are cooled to 19o C at 1.5 bar, thus find:  Equivalent ratio.  Dry exhaust gas analysis.  Mass of condensed water per kg of fuel.

2.In an engine test the dry volumetric analysis of the products was CO2 0.0527, O2 0.1338 and N20.8135. Assume the fuel is a pure hydrocarbon and that it is completely burnt.(a) Write the complete balance chemical equation on volume basis.Estimate:(b) The ratio of carbon to hydrogen in the fuel by mass.(c) The air/fuel ratio by mass.Assume the percentage of nitrogen in air is: 76.7% by mass and 79% by volume (or mole). NOTE: Do not solve this problem in tabulated form, otherwise your answer will be considered totally wrong.

QUESTION 1 [30 MARKS] In a bus engine, diesel fuel is burned with dry air. Both the diesel fuel and the dry air enter the combustion chamber of the engine at reference state of 1atm pressure and 25°C. The exhaust gases leave the combustion chamber at 400K. Using a dry type of gas analyser, an ultimate analysis of the exhaust gases gives 12%CO2, 3.7%O2 and 83.47% N2. Determine: a) The balanced combustion equation. [5 marks] b) The percentage of excess air. [5 marks] c) The amount of energy released in this combustion process in kJ/kg of fuel. [20 marks]