A power plant operates with water undergoing a simple rankine cycle. The plant steam generator operates at 3 MPa, while the condenser operates at 5 kPa. The turbine receives steam at 3 MPa, 250 °C. The isentropic efficiencies of the turbine and the feedwater pump are 90%, and 80%, respectively. a. Graph the cycle on a T-s diagram and calculate the heat added to the cycle (kJ/kg) b. If the plant produces 30 MW of net power, calculate the mass flow of steam (kg/s) and calculate the thermal efficiency (%) c. The condenser rejects heat in a heat exchange process. On the other line, river water, initially at 20 °C, flows in from the outside. If the water exits the process at a temperature of 30 °C, calculate the mass flow of the river water
A power plant operates with water undergoing a simple rankine cycle. The plant steam generator operates at 3 MPa, while the condenser operates at 5 kPa. The turbine receives steam at 3 MPa, 250 °C. The isentropic efficiencies of the turbine and the feedwater pump are 90%, and 80%, respectively. a. Graph the cycle on a T-s diagram and calculate the heat added to the cycle (kJ/kg) b. If the plant produces 30 MW of net power, calculate the mass flow of steam (kg/s) and calculate the thermal efficiency (%) c. The condenser rejects heat in a heat exchange process. On the other line, river water, initially at 20 °C, flows in from the outside. If the water exits the process at a temperature of 30 °C, calculate the mass flow of the river water
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
A power plant operates with water undergoing a simple rankine cycle. The plant steam
generator operates at 3 MPa, while the condenser operates at 5 kPa. The turbine receives steam at 3
MPa, 250 °C.
The isentropic efficiencies of the turbine and the feedwater pump are 90%, and 80%, respectively.
a. Graph the cycle on a T-s diagram and calculate the heat added to the cycle (kJ/kg)
b. If the plant produces 30 MW of net power, calculate the mass flow of steam (kg/s) and calculate the thermal efficiency (%)
c. The condenser rejects heat in a heat exchange process. On the other line, river water, initially at
20 °C, flows in from the outside. If the water exits the process at a temperature of 30 °C, calculate
the mass flow of the river water.
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