Final answer:
The Otto cycle calculations involve determining the net work, thermal efficiency, mean effective pressure, and maximum temperature, using the given initial conditions, compression ratio, and specified heat addition.
Step-by-step explanation:
The Otto cycle is a theoretical model for the internal combustion engines typically found in automobiles. Given the initial conditions of pressure p1 = 1 bar and temperature T1 = 300 K at the beginning of the compression process and a compression ratio of 8.5, we can determine: (a) the net work (b) the thermal efficiency (c) the mean effective pressure, and (d) the maximum temperature of the cycle.
The heat addition per unit mass of air is given as 1400 kJ/kg, which will be essential for our calculations. Using thermodynamic equations for an air-standard Otto cycle can help us find the sought values.
- Net work - This can be found by calculating the work during both the compression and expansion strokes and then finding the difference between them.
- Thermal efficiency - This is the ratio of net work output to the heat input, both per unit mass.
- Mean effective pressure - This is a metric that represents the average pressure acting on the piston during the power stroke; it is derived from the net work and the displacement volume.
- Maximum temperature - At the end of the combustion process (just before expansion), the temperature can be determined by applying the ideal gas law and processes specific to the Otto cycle.
Note: Specific formulas from the textbook should be used to calculate the exact values, considering the adiabatic process for both compression and expansion (using the appropriate value of gamma for air), the constant volume process for heat addition, and the properties of an ideal gas.