Steam enters a turbine with a pressure of 30 bar and a temperature of 400°C. Saturated vapor at 100°C exits the turbine. At steady state, the turbine develops work equal to 532.2 kJ per kg of steam flowing through the turbine. Heat transfer between the turbine and its surroundings occurs at an average outer surface temperature of 350 K. Neglect the change in potential and kinetic energy between inlet and exit. Determine (a) the heat transferred between the turbine and its surroundings, per kg of steam flowing, (b) the rate at which entropy is produced within the turbine per kg of steam flowing, in kJ/kg ·K.

Elements Of Electromagnetics
7th Edition
ISBN:9780190698614
Author:Sadiku, Matthew N. O.
Publisher:Sadiku, Matthew N. O.
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Steam enters a turbine with a pressure of 30 bar and a temperature of 400°C. Saturated
vapor at 100°C exits the turbine. At steady state, the turbine develops work equal to 532.2
kJ per kg of steam flowing through the turbine. Heat transfer between the turbine and its
surroundings occurs at an average outer surface temperature of 350 K. Neglect the change
in potential and kinetic energy between inlet and exit. Determine (a) the heat transferred
between the turbine and its surroundings, per kg of steam flowing, (b) the rate at which
entropy is produced within the turbine per kg of steam flowing, in kJ/kg ·K.
Transcribed Image Text:Steam enters a turbine with a pressure of 30 bar and a temperature of 400°C. Saturated vapor at 100°C exits the turbine. At steady state, the turbine develops work equal to 532.2 kJ per kg of steam flowing through the turbine. Heat transfer between the turbine and its surroundings occurs at an average outer surface temperature of 350 K. Neglect the change in potential and kinetic energy between inlet and exit. Determine (a) the heat transferred between the turbine and its surroundings, per kg of steam flowing, (b) the rate at which entropy is produced within the turbine per kg of steam flowing, in kJ/kg ·K.
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