Steam at T = 400°C and P = 5 bar enters an adiabatic, steady-state nozzle. The exiting pressure is P = 1 bar.

A. If the nozzle is reversible, find the temperature and velocity of the exiting steam.

B. If the exiting temperature is T = 350°C, then the nozzle is identical to the one that was examined in Example 3-4. Find the amount of entropy generated in this nozzle for each kilogram of entering steam.

Example 3-4.

If steam flows through an adiabatic nozzle at steady state, entering the nozzle with a pressure of 5 bar and a temperature of 4008C and exiting at 1 bar and 3508C (Figure 3-6), what is its exiting velocity?

Figure 3-6