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A multi-stagé high-pressure steam turbine is supplied with steam at a stagnation pressure of 7 MPa. and a stagnation temperature of 500°C. The corresponding specific enthalpy is 3410 kJ/kg. The steam exhausts from the turbine at a stagnation pressure of 0.7 MPa, the steam having been in a superheated condition throughout the expansion. It can be assumed that the steam behaves like a perfect gas over the range of the expansion and that y = 1.3. The specific volume of superheated steam is represented by pv = 0.231(h-1943) where p is in kPa, v is in m³kg and h is in kJkg. Given that the turbine flow process has a small-stage efficiency of 0.82, detemine the temperature and specific volume at the end of the expansion.

A multi-stagé high-pressure steam turbine is supplied with steam at a stagnation pressure of 7 MPa. and a stagnation temperature of 500°C. The corresponding specific enthalpy is 3410 kJ/kg. The steam exhausts from the turbine at a stagnation pressure of 0.7 MPa, the steam having been in a superheated condition throughout the expansion. It can be assumed that the steam behaves like a perfect gas over the range of the expansion and that y = 1.3. The specific volume of superheated steam is represented by pv = 0.231(h-1943) where p is in kPa, v is in m³kg and h is in kJkg. Given that the turbine flow process has a small-stage efficiency of 0.82, detemine the temperature and specific volume at the end of the expansion.

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
Problem 1.1MA
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A multi-stage high-pressure steam turbine is supplied with steam at a stagnation pressure of 7 MPa. and a stagnation temperature of 500°C. The corresponding specific enthalpy is 3410 kJ/kg. The steam exhausts from the turbine at a stagnation pressure of 0.7 MPa, the steam having been in a superheated condition throughout the expansion. It can be assumed that the steam behaves like a perfect gas over the range of the expansion and that y = 1.3. The specific volume of superheated steam is represented by pv = 0.231(h-1943) where p is in kPa, v is in mkg and h is in kJ/kg. Given that the turbine flow process has a small-stage efficiency of 0.82, detemine the temperature and specific volume at the end of the expansion. Following the Q1, find out the reheat factor RH.
Transcribed Image Text:A multi-stage high-pressure steam turbine is supplied with steam at a stagnation pressure of 7 MPa. and a stagnation temperature of 500°C. The corresponding specific enthalpy is 3410 kJ/kg. The steam exhausts from the turbine at a stagnation pressure of 0.7 MPa, the steam having been in a superheated condition throughout the expansion. It can be assumed that the steam behaves like a perfect gas over the range of the expansion and that y = 1.3. The specific volume of superheated steam is represented by pv = 0.231(h-1943) where p is in kPa, v is in mkg and h is in kJ/kg. Given that the turbine flow process has a small-stage efficiency of 0.82, detemine the temperature and specific volume at the end of the expansion. Following the Q1, find out the reheat factor RH.
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