Steam enters a steam turbine at a pressure of 4 MPa and a temperature of 450 ° C at 25 kg / s. At 1 MPa pressure and 350 ° C temperature conditions, intermediate steam is drawn from the turbine at a flow rate of 5 kg / h. The remainder of the steam leaves the turbine at 10 kPa pressure and 0.90 dryness. 200 kW of heat loss occurs from the turbine to the environment. Ambient temperature is 25 ° C and pressure is 100 kPa. a) Calculate the exergy (available work potentials) of the state points. b) Find the reversible amount of work and the actual amount of work during this process. c) c) Calculate the amount of irreversibility (exergy destruction) in this process. d) Calculate the second-law yield for this process.
Steam enters a steam turbine at a pressure of 4 MPa and a temperature of 450 ° C at 25 kg / s. At 1 MPa pressure and 350 ° C temperature conditions, intermediate steam is drawn from the turbine at a flow rate of 5 kg / h. The remainder of the steam leaves the turbine at 10 kPa pressure and 0.90 dryness. 200 kW of heat loss occurs from the turbine to the environment. Ambient temperature is 25 ° C and pressure is 100 kPa. a) Calculate the exergy (available work potentials) of the state points. b) Find the reversible amount of work and the actual amount of work during this process. c) c) Calculate the amount of irreversibility (exergy destruction) in this process. d) Calculate the second-law yield for this process.
Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
ChapterMA: Math Assessment
Section: Chapter Questions
Problem 1.1MA
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Steam enters a steam turbine at a pressure of 4 MPa and a temperature of 450 ° C at 25 kg / s. At 1 MPa pressure and 350 ° C temperature conditions, intermediate steam is drawn from the turbine at a flow rate of 5 kg / h. The remainder of the steam leaves the turbine at 10 kPa pressure and 0.90 dryness. 200 kW of heat loss occurs from the turbine to the environment. Ambient temperature is 25 ° C and pressure is 100 kPa.
a) Calculate the exergy (available work potentials) of the state points.
b) Find the reversible amount of work and the actual amount of work during this process.
c) c) Calculate the amount of irreversibility (exergy destruction) in this process.
d) Calculate the second-law yield for this process.
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