The air flow through a four-cylinder, four-stroke gasoline engine was measured by means of a7.5-cm diameter accurate flow-measuring device with its discharge coefficient of 0.66. Duringa Power Plants laboratory trial on this engine the following data were noted down as follows:Bore (d)Stroke (L)Shaft speed (N.)Mass flow rate of fuel used (rim, )= 110= 12= 180000 rev/h= 166.67 g/minmmcmBrake power (W, )= 40kW= 44= 2000Higher calorific value (HCV)Heat carried away by water vapours in the exhaust (qsteam)Pressure drop across the measuring device (Ahw), by a water manometer = 4Atmospheric pressure (P.)Atmospheric temperature (ta)MJ/kgkJ/kgcmH2O= 1.01= 23bar°CDetermine:(a) the brake thermal efficiency (7,th).(b) the brake mean effective pressure (Pom) , and(c) the volumetric efficiency (7ol.fme air cona) based on free air conditions.For air: R, = 0.287 kJ/(kg-K) and the mass density if water, P =987kg/m³ and the local accel-eration due to gravity, g = 9.79 m/s².NOTE: In the beginning of your Solution after Data, draw the actual P-v diagram for the engineper cycle and a simple schematic diagram of the test rig with the names of all the salient partsas well as the given property values properly labelled at appropriate locations near the parts.The marks allocated for P-v and schematic diagrams will be deducted if you do not draw these.

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The air flow through a four-cylinder, four-stroke gasoline engine was measured by means of a 7.5-cm diameter accurate flow-measuring device with its discharge coefficient of 0.66. During a Power Plants laboratory trial on this engine the following data were noted down as follows:

The air flow through a four-cylinder, four-stroke gasoline engine was measured by means of a 7.5-cm diameter accurate flow-measuring device with its discharge coefficient of 0.66. During a Power Plants laboratory trial on this engine the following data were noted down as follows:

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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