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,
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,
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: (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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