a. Calculate the mass flow rate of air inducted to the engine. b. Based on your answers above, determine the ratios of heat release in the flue gas and cooling water against input power for the engine. c. Discuss how emissions can be minimised with regards to the engine.
a. Calculate the mass flow rate of air inducted to the engine. b. Based on your answers above, determine the ratios of heat release in the flue gas and cooling water against input power for the engine. c. Discuss how emissions can be minimised with regards to the engine.
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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Transcribed Image Text:A diesel engine is a type of internal combustion engine that uses compression ignition
to turn energy in diesel fuel to rotary mechanical energy. A four-stroke (i = 0.5 for four-
stroke engine, stroke = 150 mm and revolution = 2100 min-¹) diesel engine with 6
cylinders and an effective specific fuel consumption of 0.23 kg kW-¹h-¹ has an
effective and indicated mean pressure of 9.2 bar and 6.8 bar, respectively, and a
compression ratio of 17. The ambient temperature and pressure of the diesel engine
is 30 °C and 1.017 bar, respectively, and the temperature of the exhaust gas is 650 °C.
The clearance volume of the cylinder is 107.8 cm³, and the delivery ratio is 0.83. The
mass flow rate of fuel for the diesel engine is 5.95 g s-¹. Taking the lower heating value
of diesel fuel and specific heat of flue gas to be 42500 kJ kg-¹ and 1.08 kJ kg-¹K-¹,
respectively, answer the following:
a. Calculate the mass flow rate of air inducted to the engine.
b. Based on your answers above, determine the ratios of heat release in the flue gas and
cooling water against input power for the engine.
c. Discuss how emissions can be minimised with regards to the engine.
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