Q 4. The following data refers to a 12 cylinder, single acting two stroke marine diesel engine. Speed = 150 rpm, cylinder diameter = 0.8m, stroke of piston = 1.2m, Area of indicator diagram = 5.5 x 10^-4 sq. m, Length of the indicator diagram 0.06m and Spring value = 147 MPa /m. %3D

Q 4. The following data refers to a 12 cylinder, single acting two stroke marine diesel engine. Speed = 150 rpm, cylinder diameter = 0.8m, stroke of piston = 1.2m, Area of indicator diagram = 5.5 x 10^-4 sq. m, Length of the indicator diagram 0.06m and Spring value = 147 MPa /m. %3D

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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1 The following observations are recorded during a test on a four-stroke petro engine, F.C = 25cc of fuel in 10 sec, speed of the engine is 2600 rpm, B.P = 22 kW, Qair 0.00134 m, piston diameter 90 mm, density of the fuel = 0.85gm/cc , compression ratio = 7.5, CV of fuel = 42000KJ/Kg, room temperature = 24 °C %3D = 140mm, stroke length = %3D %3D %3D 2 A six-cylinder 4-stroke cycle petrol engine is to be designed to develop 250 kW of (b.p) at 2200 rpm the stroke / bore ratio is to be 1.3:1. Assuming nm =80% and an indicated mean effective pressure of 9.5 bar, determine the required bore and stroke. If the compression ratio of the engine is to be 7.5 to 1, determine consumption of petrol in kg/h and in kg/bp.hr. Take the ratio of the indicated thermal efficiency of the engine to that of the constant volume air standard cycle as 0.65 and the calorific value of the petrol as; 44770KJ/kg.
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