Q5 A How Is The Rpm Revolutions Per Minute Of An Actual Four Stroke Gasoline Engine Related To The Number Of Thermo 1 (39.14 KiB) Viewed 26 times
Q5 A How Is The Rpm Revolutions Per Minute Of An Actual Four Stroke Gasoline Engine Related To The Number Of Thermo 2 (39.14 KiB) Viewed 26 times
Q5. (a) How is the rpm (revolutions per minute) of an actual four-stroke gasoline engine related to the number of thermodynamic cycles? What would your answer be for a two-stroke engine? (5 marks) (b) The compression ratio of an air-standard Otto cycle is 9.5. Prior to the isentropic compression process, the air is 100 kPa, 35 °C, and 600 cm³. The temperature at the end of the isentropic expansion process is 800 K. Using specific heat capacities at room temperatures, determine (i) (iii) (iv) The highest temperature and pressure in the cycle. The amount of heat transferred in kJ. The thermal efficiency. The mean effective pressure. (5 marks) (5 marks) (5 marks) (10 marks) Continued...
Q5. (a) How is the rpm (revolutions per minute) of an actual four-stroke gasoline engine related to the number of thermodynamic cycles? What would your answer be for a two-stroke engine? (5 marks) (b) The compression ratio of an air-standard Otto cycle is 9.5. Prior to the isentropic compression process, the air is 100 kPa, 35 °C, and 600 cm³. The temperature at the end of the isentropic expansion process is 800 K. Using specific heat capacities at room temperatures, determine (i) (iii) (iv) The highest temperature and pressure in the cycle. The amount of heat transferred in kJ. The thermal efficiency. The mean effective pressure. (5 marks) (5 marks) (5 marks) (10 marks) Continued...
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