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2 A six-cylinder, four-stroke, direct-injection oil engine is to deliver 120 kW at 1600 rpm. The fuel to be used has a calorific value of 43 M.J/kg and its percentage composition by mass is carbon 86.0%, hydrogen 13.0%, non combustibles 0%. The absolute volumetric efficiency is assumed to 80%, the indicated thermal efficiency 40% and the mechan- ical efficiency 80%. The air consumption to be required for theoretically correct e 1100 in excess of that (i) Estimate the volumetric comp Jlf of dry exhaust gas (ii) Determine the bore and stroke of t he engine, taking a stroke to bore ratio as 1.5. Assume the volume of 1 kg of air at the given conditions as 0.77 m3. Oxygen in air is 23% by mass and 21% by volume.

2 A six-cylinder, four-stroke, direct-injection oil engine is to deliver 120 kW at 1600 rpm. The fuel to be used has a calorific value of 43 M.J/kg and its percentage composition by mass is carbon 86.0%, hydrogen 13.0%, non combustibles 0%. The absolute volumetric efficiency is assumed to 80%, the indicated thermal efficiency 40% and the mechan- ical efficiency 80%. The air consumption to be required for theoretically correct e 1100 in excess of that (i) Estimate the volumetric comp Jlf of dry exhaust gas (ii) Determine the bore and stroke of t he engine, taking a stroke to bore ratio as 1.5. Assume the volume of 1 kg of air at the given conditions as 0.77 m3. Oxygen in air is 23% by mass and 21% by volume.

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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2 A six-cylinder, four-stroke, direct-injection oil engine is to deliver 120 kW at 1600 rpm. The fuel to be used has a calorific value of 43 M.J/kg and its percentage composition by mass is carbon 86.0%, hydrogen 13.0%, non combustibles 0%. The absolute volumetric efficiency is assumed to 80%, the indicated thermal efficiency 40% and the mechan- ical efficiency 80%. The air consumption to be required for theoretically correct e 1100 in excess of that (i) Estimate the volumetric comp Jlf of dry exhaust gas (ii) Determine the bore and stroke of t he engine, taking a stroke to bore ratio as 1.5. Assume the volume of 1 kg of air at the given conditions as 0.77 m3. Oxygen in air is 23% by mass and 21% by volume.
Transcribed Image Text:2 A six-cylinder, four-stroke, direct-injection oil engine is to deliver 120 kW at 1600 rpm. The fuel to be used has a calorific value of 43 M.J/kg and its percentage composition by mass is carbon 86.0%, hydrogen 13.0%, non combustibles 0%. The absolute volumetric efficiency is assumed to 80%, the indicated thermal efficiency 40% and the mechan- ical efficiency 80%. The air consumption to be required for theoretically correct e 1100 in excess of that (i) Estimate the volumetric comp Jlf of dry exhaust gas (ii) Determine the bore and stroke of t he engine, taking a stroke to bore ratio as 1.5. Assume the volume of 1 kg of air at the given conditions as 0.77 m3. Oxygen in air is 23% by mass and 21% by volume.
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