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A constant pressure fuel-air cycle of a compression ratio of (18). The ambient conditions are (1.0 bar) and (27 °C). The engine is running on C,H₁, which burned with 120% theoretical of air, the residual gas fraction is (4%). If the pressure at the end of expansion stroke is 4.5 bar and the exhaust temperature is (1200 K), calculate the cut-off ratio and thermal efficiency of the cycle if the lower calorific value is (42000 kJ/kg). Assume Cpp for products is (1.135 kJ/kg.K) and (M, = 30), for reactants MR will be calculated from chemical equation. P₂ P4 P₁ 2₁ Qin Suction V₂ V3 Exhaust Isentropic Qout

A constant pressure fuel-air cycle of a compression ratio of (18). The ambient conditions are (1.0 bar) and (27 °C). The engine is running on C,H₁, which burned with 120% theoretical of air, the residual gas fraction is (4%). If the pressure at the end of expansion stroke is 4.5 bar and the exhaust temperature is (1200 K), calculate the cut-off ratio and thermal efficiency of the cycle if the lower calorific value is (42000 kJ/kg). Assume Cpp for products is (1.135 kJ/kg.K) and (M, = 30), for reactants MR will be calculated from chemical equation. P₂ P4 P₁ 2₁ Qin Suction V₂ V3 Exhaust Isentropic Qout

Elements Of Electromagnetics
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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17 A constant pressure fuel-air cycle of a compression ratio of (18). The ambient conditions are (1.0 bar) and (27 °C). The engine is running on C,H₁, which burned with 120% theoretical of air, the residual gas fraction is (4%). If the pressure at the end of expansion stroke is 4.5 bar and the exhaust temperature is (1200 K), calculate the cut-off ratio and thermal efficiency of the cycle if the lower calorific value is (42000 kJ/kg). Assume Cpp for products is (1.135 kJ/kg.K) and (M, = 30), for reactants MR will be calculated from chemical equation. P₂ P4 P₁ Qin Suction V₂ V3 Exhaust Isentropic V₁ Qout
Transcribed Image Text:17 A constant pressure fuel-air cycle of a compression ratio of (18). The ambient conditions are (1.0 bar) and (27 °C). The engine is running on C,H₁, which burned with 120% theoretical of air, the residual gas fraction is (4%). If the pressure at the end of expansion stroke is 4.5 bar and the exhaust temperature is (1200 K), calculate the cut-off ratio and thermal efficiency of the cycle if the lower calorific value is (42000 kJ/kg). Assume Cpp for products is (1.135 kJ/kg.K) and (M, = 30), for reactants MR will be calculated from chemical equation. P₂ P4 P₁ Qin Suction V₂ V3 Exhaust Isentropic V₁ Qout
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