Achieve the requirements for changes in the working fluid state;

Achieve some kind of energy conversion

Reveal the changing rules of working fluid state parameters and energy conversion during the process, and then find out the main factors affecting the conversion.

The working fluid is an ideal gas

In order to simplify the problem, the irreversible loss in the actual process is not considered for the time being. Reversible process. The irreversible loss is then corrected with the help of empirical coefficients.

The specific heat capacities are all taken as constant values.

According to the characteristics of the process, determine the process equation (the relationship between p and v)

Determine the relationship between the initial and final states of the basic state parameters

Determine the changes in thermodynamic energy, enthalpy, and entropy of the system as well as the calculation formulas for work and heat

Draw process curves in p-v diagrams and T-S diagrams to intuitively express the changing rules of working fluid state parameters and energy conversion.