4. A single cylinder four stroke diesel engine works on the following data: Cylinder bore = 15 cm, stroke = 25 cm, speed= 250 rpm; area of indicator diagram = 6 cm²; length of indicator diagram = 9 cm; spring constant = 7.5 bar/cm; BSFC= 0.24 kg/kWh; CV of fuel = 42000kj/kg; diameter of brake wheel = 70 cm; rope diameter = 3.5 cm ; brake load= 40kg (392.4 N), Calculate the following performance parameter a. Brake power b. Indicated mean effective pressure c. Indicated power %3D %3D

4. A single cylinder four stroke diesel engine works on the following data: Cylinder bore = 15 cm, stroke = 25 cm, speed= 250 rpm; area of indicator diagram = 6 cm²; length of indicator diagram = 9 cm; spring constant = 7.5 bar/cm; BSFC= 0.24 kg/kWh; CV of fuel = 42000kj/kg; diameter of brake wheel = 70 cm; rope diameter = 3.5 cm ; brake load= 40kg (392.4 N), Calculate the following performance parameter a. Brake power b. Indicated mean effective pressure c. Indicated power %3D %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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In a laboratory test of a 4-stroke engine with Vd = 3.05 liters at N = 3000 RPM the following performance data are measured: net IMEP 107.9 lbf/in2 , 70.32 brake horsepower, fuel flow rate 16.66 kg/hr., air flow rate 269.6 kg/hr. The fuel is C8H18 (QR = 4.3 x 107 J/kg.) The ambient air temperature is 295K. The intake pressure gauge is broken, so the intake pressure is not known. Determine: (d) brake thermal efficiency, (e) indicated torque, (f) Is this engine throttled, turbocharged or neither? Explain. (Hint: compute the volumetric efficiency.)
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In a laboratory test of a 4-stroke engine with Vd = 3.05 liters at N = 3000 RPM the following performance data are measured: net IMEP 107.9 lbf/in2 , 70.32 brake horsepower, fuel flow rate 16.66 kg/hr., air flow rate 269.6 kg/hr. The fuel is C8H18 (QR = 4.3 x 107 J/kg.) The ambient air temperature is 295K. The intake pressure gauge is broken, so the intake pressure is not known. Determine: (a) Brake MEP, (b) Friction MEP, (c) equivalence ratio, (d) brake thermal efficiency, (e) indicated torque, (f) Is this engine throttled, turbocharged or neither? Explain. (Hint: compute the volumetric efficiency.)
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