Chemical Engineering Design Principles Practice Assignment

Assignment Task

a. You are a chemical engineer in charge of a process using an open feedwater heater. You flow superheated steam into your process along with two liquid water streams, with the goal of creating a saturated vapor. The following parameters hold for your system:

• Propert=300 bar Tate=600°C
• Flowrate=30 kg/s
• Piquid water 150 bar
• Tiquid=20°C
• Flowrated 14 kg/s
• Piquid water2=50 bar
• Liquid quid www2=0°C
• Flouratiquid water 2=2 kg/s

The temperature surrounding the system is a comfortable 28°C. The system may be assumed to be at steady state. The saturated steam leaves at 80 bar.

• Determine the final temperature of the saturated steam (in Celsius).
• Perform an energy balance and calculate the amount of heat removal needed to achieve our saturated steam conditions
• Calculate the rate of entropy generation resulting from this system

b. Now your output steam from part (a) is to be put through a nozzle with a steam velocity of 40 m/s. The pressure at the end of the nozzle is 40 bar. Furthermore, the system is not adiabatic, with 10,000 kJ/s of heat constantly added to the steam. The surrounding temperature is still 28°C. Assume the process is reversible.

• Calculate the specific entropy of the exiting steam. Determine the final temperature of the exiting steam
• Determine the velocity of steam leaving the nozzle.

This Engineering has been solved by our PHD Experts at My Uni Paper.