Q9: In a test on a two- stroke, heavyoil, marine engine, the followingobservations were made, Oilconsumption, 4.05 kg; Calorificvalue of oil, 43000 kj/kg; het brakeload 579N; Mean brake diameter, 1m; mean effective pressure 275 kN/m2; Cylinder diameter 0.20m; stroke,0.250m; speed, 360 rpm. Icalculateo @ the mechanical efficiency theindicated thermal efficiency O Ihebrake thermal efficiency and Thequantity of jacket water requiredper minute if 30% of the energysupplied by the fuel is absorbedby this waterPermissible rise intemperature is 20k and specific heatcapacity of water=4.1868

ρme=Mean Effective Pressure=275 kN/m2=275×103 N/m2Nc=Speed=360 rpmdc=Cylinder Diameter=0.20…

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

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

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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Concept explainers

Clutches, Brakes, Couplings, and Flywheels

The clutch is described as a machine element used to connect or disconnect two shafts together to transmit torque or power. The clutch works on the principles of friction. The clutch is commonly used in automobiles to transfer power from the driving shaft to the driven shaft.

Question

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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Step 1: Given Data

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Step 2: Calculating The Area of The Cylinder

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Step 3: Calculating The Torque due to Brake

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Step 4: Calculating The Indicated Power

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Step 5: Calculating The Brake Power

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Step 6: Calculating The Heat Supplied by Consumption

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Step 7: (A) Calculating The Mechanical Efficiency

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Step 8: (B) Calculating The Indicated Thermal Efficiency

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Step 9: (C) Calculating The Brake Thermal Efficiency

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Step 10: (D) Calculating The Quantity of Jacket Water Required per minute

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