A typical maritime fuel oil contains 85.7 wt% elemental Carbon, 13.4 wt% elemental Hydrogen and 0.9%...
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A typical maritime fuel oil contains 85.7 wt% elemental Carbon, 13.4 wt% elemental Hydrogen and 0.9% elemental Sulphur. The specific gravity of this fuel is 0.84 and its lower heating value is 43MJ/kg (at 25 C, 1 atm). The average specific heat of all gases for this problem can be considered to be 1 kJ/kg C. Useful info: 1 mile = 1.61 km; 1 gal = 3.8 litres; Atm/Mol wt: C= 12 g/mol; H= 1 g/mol; S= 32 g/mol; 0= 16 g/mol; Air = 29 g/mol Fuel at 25C 2 Air at 150 C Engine Q+W 3 Flue gas at 700C a) Write down three stoichiometric equations for the complete combustion of the elements in the fuel oil. b) For a basis of 1 kg of the fuel oil, determine the number of moles of each element, and calculate the stoichiometric amount of air required [kg]. Assume air is 21 mol % O and 79 mol% N2. c) For a basis of 1 kg of the fuel oil, if 10% excess air is supplied, what is mass [kg] of the flue gas emitted? (Hint: Consider an overall mass balance) d) For a basis of 1 kg of the fuel oil burned, if the actual temperature of the flue gas leaving the engine is 700 C, how much energy (heat + work) is recovered [kj]? | e) A cargo ship has a mileage of 2 miles per thousand gallons of fuel oil. If the ship makes a 6200 km trip, how much lighter [in tonnes] will it be at the end of the trip? f) BONUS: Since CO emissions from shipping are a major contributor to global warming, an engineer has developed a process that can recover 90% of the CO that comes out of the exhaust and stores it as a liquid. With this system on board, how much heavier/lighter will the ship be at the end of the 6200 km trip? A typical maritime fuel oil contains 85.7 wt% elemental Carbon, 13.4 wt% elemental Hydrogen and 0.9% elemental Sulphur. The specific gravity of this fuel is 0.84 and its lower heating value is 43MJ/kg (at 25 C, 1 atm). The average specific heat of all gases for this problem can be considered to be 1 kJ/kg C. Useful info: 1 mile = 1.61 km; 1 gal = 3.8 litres; Atm/Mol wt: C= 12 g/mol; H= 1 g/mol; S= 32 g/mol; 0= 16 g/mol; Air = 29 g/mol Fuel at 25C 2 Air at 150 C Engine Q+W 3 Flue gas at 700C a) Write down three stoichiometric equations for the complete combustion of the elements in the fuel oil. b) For a basis of 1 kg of the fuel oil, determine the number of moles of each element, and calculate the stoichiometric amount of air required [kg]. Assume air is 21 mol % O and 79 mol% N2. c) For a basis of 1 kg of the fuel oil, if 10% excess air is supplied, what is mass [kg] of the flue gas emitted? (Hint: Consider an overall mass balance) d) For a basis of 1 kg of the fuel oil burned, if the actual temperature of the flue gas leaving the engine is 700 C, how much energy (heat + work) is recovered [kj]? | e) A cargo ship has a mileage of 2 miles per thousand gallons of fuel oil. If the ship makes a 6200 km trip, how much lighter [in tonnes] will it be at the end of the trip? f) BONUS: Since CO emissions from shipping are a major contributor to global warming, an engineer has developed a process that can recover 90% of the CO that comes out of the exhaust and stores it as a liquid. With this system on board, how much heavier/lighter will the ship be at the end of the 6200 km trip?
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Related Book For
Fundamentals Of Momentum Heat And Mass Transfer
ISBN: 9781118947463
6th Edition
Authors: James Welty, Gregory L. Rorrer, David G. Foster
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