A SI engine operating with air-standard Otto cycle, has a compression ratio of 9.5 and uses gasoline with AF =15.5. The
Posted: Fri Jul 01, 2022 6:38 am
- A Si Engine Operating With Air Standard Otto Cycle Has A Compression Ratio Of 9 5 And Uses Gasoline With Af 15 5 The 1 (74.97 KiB) Viewed 24 times
A SI engine operating with air-standard Otto cycle, has a compression ratio of 9.5 and uses gasoline with AF =15.5. The combustion efficiency is 96%. The cylinder conditions at the start of compression in at 60 oC and 98 kPa. Assume the specific heat ratio k 1.35. Calculate: = a) Temperature and pressure at all states in the cycle. [T₁= 60 oC, T2=459 oC, T3=3506 oC, T4= 1446 oC, P₁= 98 kPa, P₂= 2047 kPa, P3 = 10568 kPa, P4= 506 kPa] [1689 kJ/kg] b) Specific work done by the piston during power stroke. c) Heat added during combustion. [2502 kJ/kg] d) Net specific work done per cycle. [+1362 kJ/kg] e) Indicated thermal efficiency. [54.5%]