8.20 Water is the working fluid in an ideal Rankine cycle with reheat. Superheated vapor enters the turbine at 10 MPa, 320°C, and the condenser pressure is 8 kPa. Steam expands through the first-stage turbine to 1 MPa and then is reheated to 320°C. Determine for the cycle a. the heat addition, in kJ per kg of steam entering the first-stage turbine. 3310.06 b. the thermal efficiency. 37.2% c. the heat transfer from the working fluid passing through the condenser to the cooling water, in kJ per kg of steam entering the first-stage turbine. 2078.2

8.20 Water is the working fluid in an ideal Rankine cycle with reheat. Superheated vapor enters the turbine at 10 MPa, 320°C, and the condenser pressure is 8 kPa. Steam expands through the first-stage turbine to 1 MPa and then is reheated to 320°C. Determine for the cycle a. the heat addition, in kJ per kg of steam entering the first-stage turbine. 3310.06 b. the thermal efficiency. 37.2% c. the heat transfer from the working fluid passing through the condenser to the cooling water, in kJ per kg of steam entering the first-stage turbine. 2078.2

Elements Of Electromagnetics

7th Edition

ISBN:9780190698614

Author:Sadiku, Matthew N. O.

Publisher:Sadiku, Matthew N. O.

ChapterMA: Math Assessment

Section: Chapter Questions

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8.20 Water is the working fluid in an ideal Rankine cycle with reheat. Superheated
vapor enters the turbine at 10 MPa, 320°C, and the condenser pressure is 8 kPa. Steam
expands through the first-stage turbine to 1 MPa and then is reheated to 320°C.
Determine for the cycle
a. the heat addition, in kJ per kg of steam entering the first-stage turbine. 3310.06
b. the thermal efficiency. 37.2%
c. the heat transfer from the working fluid passing through the condenser to the
cooling water, in kJ per kg of steam entering the first-stage turbine. 2078.2

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Step 1: Writing given data

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Step 2: Rankine cycle with reheat and T-s diagram

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Step 3: Enthalpy at various points of a cycle

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Step 4: Enthalpies at various points of a cycle

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Step 5: Enthalpies at various points of a cycle

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Step 6: Calculating the head addition to the steam

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Step 7: Calculating the thermal efficiency of cycle

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Step 8: Calculating the head transferred to cooling water

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