Consider a steam turbine in which steam enters at 10.45 MPa and 780 K with a flow rate of 38.739 kg/s. A portion of the steam is extracted from the turbine after partial expansion at three different locations as shown in the sketch. The extracted steam is then led to various heat exchangers. The mass flow rates and the temperatures and pressures at each extraction point are given in the following table: Extraction Location im (kg/s) Р (МPа) T (K) 4.343 3.054 620 Steam turbine Inlet 4.345 0.332 482 2.871 0.136 x = 0.949 The remaining wet steam exits the turbine at 11.5 kPa with a quality of 0.88. Estimate the power produced by the turbine assuming adiabatic operation and neg- ligible kinetic and potential energies for all streams. Exit 1 2 3 Extraction locatione 123

Consider a steam turbine in which steam enters at 10.45 MPa and 780 K with a flow rate of 38.739 kg/s. A portion of the steam is extracted from the turbine after partial expansion at three different locations as shown in the sketch. The extracted steam is then led to various heat exchangers. The mass flow rates and the temperatures and pressures at each extraction point are given in the following table: Extraction Location im (kg/s) Р (МPа) T (K) 4.343 3.054 620 Steam turbine Inlet 4.345 0.332 482 2.871 0.136 x = 0.949 The remaining wet steam exits the turbine at 11.5 kPa with a quality of 0.88. Estimate the power produced by the turbine assuming adiabatic operation and neg- ligible kinetic and potential energies for all streams. Exit 1 2 3 Extraction locatione 123

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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The remaining wet steam exits the turbine at 11.5 kPa with a quality of 0.88. Determine the minimum pipe diameters required to restrict the maximum inlet velocity to 50 m/s, the maximum extraction velocities each to 75 m/s, and the turbine outlet velocity to 130 m/s. Consider a steam turbine in which steam enters at 10.45 MPa and 780 K with a flow rate of 38.739 kg/s. As shown in the sketch, a portion of the steam is extracted from the turbine after partial expansion at three different locations. The extracted steam is then led to various heat exchangers. The mass flow rates and the temperatures and pressures at each extraction point are given in the following table: Inlet Steam turbine Extraction Location rin(kg/s) P (MPa) T(K) 1 23 4.343 3.054 620 4.345 0.332 482 Extraction 3. 2.871 0.136 x= 0.949 locations Exit 123
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