During a 60–minute trial of a single cylinder four-stroke oil engine, the following observations were made. Engine dimension = 0.3 m bore X 0.45 m stroke, Fuel consumption 11.4 kg, Calorific value of fuel = 40 MJ/kg, IMEP = 6 bar, Net load on brakes = 1652 N , Speed = 300 rpm, Brake drum diameter = 1.8 m, Brake rope diameter = 20 mm, Quantity of jacket cooling water = 600 kg, Temperature rise of cooling water = 55°C, Quantity of air as measured = 250 kg, Exhaust gas temperature = 420°C, Specific heat of exhaust gas = 1.0 kJ/kg K, Ambient temperature = 20°C. Draw up an energy balance sheet of the engine and calculate for: Qw = energy loss due to cooling water, in kJ Qe = energy loss due to exhaust gas, in kJ Qu = unaccounted energy loss due to convection, radiation, etc. , in kJ
During a 60–minute trial of a single cylinder four-stroke oil engine, the following observations were made. Engine dimension = 0.3 m bore X 0.45 m stroke, Fuel consumption 11.4 kg, Calorific value of fuel = 40 MJ/kg, IMEP = 6 bar, Net load on brakes = 1652 N , Speed = 300 rpm, Brake drum diameter = 1.8 m, Brake rope diameter = 20 mm, Quantity of jacket cooling water = 600 kg, Temperature rise of cooling water = 55°C, Quantity of air as measured = 250 kg, Exhaust gas temperature = 420°C, Specific heat of exhaust gas = 1.0 kJ/kg K, Ambient temperature = 20°C. Draw up an energy balance sheet of the engine and calculate for: Qw = energy loss due to cooling water, in kJ Qe = energy loss due to exhaust gas, in kJ Qu = unaccounted energy loss due to convection, radiation, etc. , in kJ
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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During a 60–minute trial of a single cylinder four-stroke oil engine, the following observations were made. Engine dimension = 0.3 m bore X 0.45 m stroke, Fuel consumption 11.4 kg, Calorific value of fuel = 40 MJ/kg, IMEP = 6 bar, Net load on brakes = 1652 N , Speed = 300 rpm, Brake drum diameter = 1.8 m, Brake rope diameter = 20 mm, Quantity of jacket cooling water = 600 kg, Temperature rise of cooling water = 55°C, Quantity of air as measured = 250 kg, Exhaust gas temperature = 420°C, Specific heat of exhaust gas = 1.0 kJ/kg K, Ambient temperature = 20°C.
Draw up an energy balance sheet of the engine and calculate for:
Qw = energy loss due to cooling water, in kJ
Qe = energy loss due to exhaust gas, in kJ
Qu = unaccounted energy loss due to convection, radiation, etc. , in kJ
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Step 1: Determine the given variables
VIEWStep 2: Calculating the brake power
VIEWStep 3: Calculating the heat supplied to the engine
VIEWStep 4: Calculating heat equivalent of brake power
VIEWStep 5: Calculating the heat lost to cooling water
VIEWStep 6: Calculating heat lost due to exhaust gas
VIEWStep 7: Calculating the unaccounted energy loss due to convection, radiation, etc.
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