A six cylinder, four-stroke CI engine is tested against a water brake dynamometer for which B.P = WN/17x10' in kW, where W is the brake load in newton and N is the speed of the engine in the r.p.m. The air consumption was measured by means of a sharp edged orifice. During the test following observersations were taken : • Bore • Stroke • Speed • Brake load • Barometer reading = 10 cm = 14 cm = 2500 rpm = 480 N = 76 cm Hg Orifice diameter = 3.3 cm = 0.62 Co-efficient of discharge of orifice • Pressure drop across orifice = 14 cm of Hg = 25°C Room temperature Fuel Consumption %3D = 0.32 kg/min %3D

Elements Of Electromagnetics
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CHAPTER 5 : DIESEL ENGINE POWER PLANT
A six cylinder, four-stroke CI engine is tested against a water brake dynamometer for which
B.P = WN/17x10' in kW, where W is the brake load in newton and N is the speed of the
engine in the r.p.m. The air consumption was measured by means of a sharp edged orifice.
During the test following observersations were taken :
• Bore
• Stroke
• Speed
• Brake load
Barometer reading
= 10 cm
= 14 cm
= 2500 rpm
= 480 N
= 76 cm Hg
• Orifice diameter
• Co-efficient of discharge of orifice
• Pressure drop across orifice
• Room temperature
Fuel Consumption
= 3.3 cm
= 0.62
= 14 cm of Hg
= 25°C
= 0.32 kg/min
Calculate following :
i.
The volumetric efficiency
The brake mean effective pressure ( b.m.e.p)
The engine torque
The brake specific fuel consumption ( b.s.f.c )
ii.
iv.
Transcribed Image Text:CHAPTER 5 : DIESEL ENGINE POWER PLANT A six cylinder, four-stroke CI engine is tested against a water brake dynamometer for which B.P = WN/17x10' in kW, where W is the brake load in newton and N is the speed of the engine in the r.p.m. The air consumption was measured by means of a sharp edged orifice. During the test following observersations were taken : • Bore • Stroke • Speed • Brake load Barometer reading = 10 cm = 14 cm = 2500 rpm = 480 N = 76 cm Hg • Orifice diameter • Co-efficient of discharge of orifice • Pressure drop across orifice • Room temperature Fuel Consumption = 3.3 cm = 0.62 = 14 cm of Hg = 25°C = 0.32 kg/min Calculate following : i. The volumetric efficiency The brake mean effective pressure ( b.m.e.p) The engine torque The brake specific fuel consumption ( b.s.f.c ) ii. iv.
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