Q1/ In a test on a two stroke, heavy oil, marine engine, the following observations were made:- oil consumption 4.05 kg/hr, calorific value of oil 43M¡/kg, net brake load 579 N, mean brake diameter 1 m, mean effective pressure 275 kN/m2, cylinder diameter 0.20 m, stroke 0.250 m, speed 360 r.p.m: calculate (a) the mechanical efficiency (b) the indicated thermal efficiency (c) the brake thermal efficiency and (d) the quantity of jacket water required if 30% of the energy supplied by the fuel is absorbed by this water. Permissible rise in temperature is 20 k and specific heat capacity of water is 4.1868 kJ/kg.K.

Q1/ In a test on a two stroke, heavy oil, marine engine, the following observations were made:- oil consumption 4.05 kg/hr, calorific value of oil 43M¡/kg, net brake load 579 N, mean brake diameter 1 m, mean effective pressure 275 kN/m2, cylinder diameter 0.20 m, stroke 0.250 m, speed 360 r.p.m: calculate (a) the mechanical efficiency (b) the indicated thermal efficiency (c) the brake thermal efficiency and (d) the quantity of jacket water required if 30% of the energy supplied by the fuel is absorbed by this water. Permissible rise in temperature is 20 k and specific heat capacity of water is 4.1868 kJ/kg.K.

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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Q9: In a test on a two- stroke, heavy oil, marine engine, the following observations were made, Oil consumption, 4.05 kg; Calorific value of oil, 43000 kj/kg; het brake load 579N; Mean brake diameter, 1 m; mean effective pressure 275 kN/ m2; Cylinder diameter 0.20m; stroke, 0.250m; speed, 360 rpm. Icalculate o @ the mechanical efficiency the indicated thermal efficiency O Ihe brake thermal efficiency and The quantity of jacket water required per minute if 30% of the energy supplied by the fuel is absorbed by this waterPermissible rise in temperature is 20k and specific heat capacity of water=4.1868
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