Question

An air standard Otto cycle operates with a compression ratio of 8. At the beginning of the compression stroke, the pressure and temperature are 100 kPa and 25°C, respectively. The pressure is tripled during the heat addition process. Assuming constant specific heats at room temperature, determine:

a.the cycle thermal efficiency

b.the maximum cycle temperature

c.the amount of heat addition in kJ/kg

d.the mean effective pressure

Answer 1

Ans a)56.47 %

b)1780.87 degree C or 2053.87 K

c) 1004.67 KJ/Kg

d) 7.58 Bar