(8 pts.) Air in an Otto cycle engine is compressed to a temperature and pressure of 450 °C and 2.5 MPa. After the power stroke, the conditions are 600 °C and 0.45 MPa. Find the peak cycle temperature (°C), heat addition (kJ/kg), and efficiency

a)  

b)  

c)  

Explanation:

From the question we are told that:

Temperature x

Pressure x

Temperature y

Pressure y

Let

Air atmospheric temperature be

Therefore

Temperature

Generally the equation for Otto cycle is mathematically given by

Therefore the peak cycle temperature (°C)

Generally the equation for Heat addition is mathematically given by

Generally the equation for Thermal  efficiency is mathematically given by

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explanation: