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Solved: Steam is leaving a pressure cooker whose operating
Chapter 5, Problem 522E(choose chapter or problem)
Steam is leaving a pressure cooker whose operating pressure is . It is observed that the amount of liquid in the cooker has decreased by in 45 minutes after the steady operating conditions are established, and the cross-sectional area of the exit opening is . Determine (a) the mass flow rate of the steam and the exit velocity, (b) the total and flow energies of the steam per unit mass, and (c) the rate at which energy is leaving the cooker by steam.
Questions & Answers
QUESTION:
Steam is leaving a pressure cooker whose operating pressure is . It is observed that the amount of liquid in the cooker has decreased by in 45 minutes after the steady operating conditions are established, and the cross-sectional area of the exit opening is . Determine (a) the mass flow rate of the steam and the exit velocity, (b) the total and flow energies of the steam per unit mass, and (c) the rate at which energy is leaving the cooker by steam.
ANSWER:Step 1 of 4
Steam is leaving a pressure cooker at a specified pressure. The velocity, flow rate, the total and flow energies, and the rate of energy transfer by mass are to be determined.
Assumptions are
1. The flow is steady, and the initial start-up period is disregarded.
2. The kinetic and potential energies are negligible, and thus they are not considered.
3. Saturation conditions exist within the cooker at all times so that steam leaves the cooker as a saturated vapor at 
The properties of saturated liquid water and water vapor at 
