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1. Steam enters an adiabatic turbine at 200 psia, 900°F and exits at 40 psia, 600°F. a. What is the actual work produced by the turbine (in BTU/lbm). (Answer: 143.61 BTU/lbm) b. What is the ideal adiabatic work (in BTU/Ibm) for the steam exiting at 40 psia (in this case the exit temperature is unknown). (Answer: 200 BTU/Ibm) c. What is the isentropic efficiency? (Answer: 71.8%) d. What is the generated entropy, Ŝgen (in BTU/R-Ibm) (Answer: 0.0566 BTU/(lbm 'R))

1. Steam enters an adiabatic turbine at 200 psia, 900°F and exits at 40 psia, 600°F. a. What is the actual work produced by the turbine (in BTU/lbm). (Answer: 143.61 BTU/lbm) b. What is the ideal adiabatic work (in BTU/Ibm) for the steam exiting at 40 psia (in this case the exit temperature is unknown). (Answer: 200 BTU/Ibm) c. What is the isentropic efficiency? (Answer: 71.8%) d. What is the generated entropy, Ŝgen (in BTU/R-Ibm) (Answer: 0.0566 BTU/(lbm 'R))

Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
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1. Steam enters an adiabatic turbine at 200 psia, 900°F and exits at 40 psia, 600°F. a. What is the actual work produced by the turbine (in BTU/lbm)? (Answer: 143.61 BTU/lbm) b. What is the ideal adiabatic work (in BTU/lbm) for the steam exiting at 40 psia (in this case the exit temperature is unknown)? (Answer: 200 BTU/lbm) c. What is the isentropic efficiency? (Answer: 71.8%) d. What is the generated entropy, \( S_{\text{gen}} \) (in BTU/R-lbm)? (Answer: 0.0566 BTU/(lbm °R))
Transcribed Image Text:1. Steam enters an adiabatic turbine at 200 psia, 900°F and exits at 40 psia, 600°F. a. What is the actual work produced by the turbine (in BTU/lbm)? (Answer: 143.61 BTU/lbm) b. What is the ideal adiabatic work (in BTU/lbm) for the steam exiting at 40 psia (in this case the exit temperature is unknown)? (Answer: 200 BTU/lbm) c. What is the isentropic efficiency? (Answer: 71.8%) d. What is the generated entropy, \( S_{\text{gen}} \) (in BTU/R-lbm)? (Answer: 0.0566 BTU/(lbm °R))
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