A wet steam at 2a bar with a quality of 0.97 (see 7.32)
Chapter 7, Problem 7.45(choose chapter or problem)
A wet steam at 2a bar with a quality of 0.97 (see 7.32) leaks through a defective steam trap and expands to a pressure of 1 atm. The process can be considered to take place in two stages: a rapid adiabatic expansion to 1 atm accompanied by complete evaporation of the liquid droplets in the wet steam, followed by cooling at 1 atm to ambient temperature. ~Ek may be neglected in both stages. (a) Estimate the temperature of the superheated steam immediately following the rapid adiabatic expansion. (b) Someone looking at the steam trap would see a clear space just outside the leak and a white plume forming a short distance away. (The same phenomenon can be observed outside the spout of a kettle in which water is boiling.) Explain this observation. What would the temperature be at the point where the plume begins?
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