Diesel Cycle. An air-standard Diesel cycle has a compression ratio of 20. Air is at 27°C and 100 kPa at the beginning of the compression process and at 1800 K at the end of the heat-addition process. Using constant specific heats at room temperature, determine (a) the cutoff ratio, (b) the heat addition and heat rejection per unit mass, and (c) the thermal efficiency. (d) If the cutoff ratio is increased to 2.0 maintaining the same compression ratio, by how much (in percentage) will be the change in the thermal efficiency? Did the thermal efficiency increase or decrease? For air: R = 0.287 kJ/kg K, c, = 0.718 kJ/kg K, c, 1.005 kJ/kg K and k = 1.4.
Diesel Cycle. An air-standard Diesel cycle has a compression ratio of 20. Air is at 27°C and 100 kPa at the beginning of the compression process and at 1800 K at the end of the heat-addition process. Using constant specific heats at room temperature, determine (a) the cutoff ratio, (b) the heat addition and heat rejection per unit mass, and (c) the thermal efficiency. (d) If the cutoff ratio is increased to 2.0 maintaining the same compression ratio, by how much (in percentage) will be the change in the thermal efficiency? Did the thermal efficiency increase or decrease? For air: R = 0.287 kJ/kg K, c, = 0.718 kJ/kg K, c, 1.005 kJ/kg K and k = 1.4.
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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