In a regenerative steam cycle employing three closed feed heaters the steam is supplied to the turbine at 42 bar and 500 °C and is exhausted to the condenser at 0.035 bar. The bleed steam for feed heating is taken at pressures of 15, 4, and 0.5 bar. Assuming ideal processes and neglecting pump work, calculate: (i) the fraction of the boiler steam bled at each stage; (ii) the power output of the plant per unit mass flow rate of boiler steam; (iii) the cycle efficiency.

In a regenerative steam cycle employing three closed feed heaters the steam is supplied to the turbine at 42 bar and 500 °C and is exhausted to the condenser at 0.035 bar. The bleed steam for feed heating is taken at pressures of 15, 4, and 0.5 bar. Assuming ideal processes and neglecting pump work, calculate: (i) the fraction of the boiler steam bled at each stage; (ii) the power output of the plant per unit mass flow rate of boiler steam; (iii) the cycle efficiency.

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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Question

In a regenerative steam cycle employing three. closed feed heaters the steam is supplied
to the turbine at 42 bar and 500°C and is exhausted to the condenser at 0.035 bar. The
bleed steam for feed heating is taken at pressures of 15, 4, and 0.5 bar. Assuming ideal
processes and neglecting pump work, calculate:
(i) the fraction of the boiler steam bled at each stage;
(ii) the power output of the plant per unit mass flow rate of boiler steam;
(iii) the cycle efficiency.

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Step 1: Given data

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Step 2: Finding Enthalpy at state 2

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Step 3: Finding Enthalpy at state 3

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Step 4: Finding Enthalpy at state 4

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Step 5: Finding Enthalpy at state 5

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Step 6: Finding the Enthalpy at all point

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Step 7: (1) Fraction of the boiler steam bled at each stage

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Step 8: (2) Power output of the plant per unit mass flow rate of boiler steam

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Step 9: (3). Power cycle efficiency

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