A natural gas-fired steam power plant consumes 360 kg/min of natural gas. If the heat losses to the surrounding air from the steam as it passes through pipes and other components are estimated to be about 100 GJ/h . The heating value of the natural gas is 45,000 kJ/kg. Part 1: 1) Determine the rate of the heat supplied by the fuel to the steam plant. 2) Determine the rate of waste heat rejection by the seam plant. 3) Determine the net power delivered by the steam power plant to the generator. 4) Calculate the efficiency of the steam power plant.
A natural gas-fired steam power plant consumes 360 kg/min of natural gas. If the heat losses to the surrounding air from the steam as it passes through pipes and other components are estimated to be about 100 GJ/h . The heating value of the natural gas is 45,000 kJ/kg. Part 1: 1) Determine the rate of the heat supplied by the fuel to the steam plant. 2) Determine the rate of waste heat rejection by the seam plant. 3) Determine the net power delivered by the steam power plant to the generator. 4) Calculate the efficiency of the steam power plant.
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 natural gas-fired steam power plant consumes 360 kg/min of natural gas. If the heat losses to the surrounding air from the steam as it passes through pipes and other components are estimated to be about 100 GJ/h . The heating value of the natural gas is 45,000 kJ/kg.
Part 1:
1) Determine the rate of the heat supplied by the fuel to the steam plant.
2) Determine the rate of waste heat rejection by the seam plant.
3) Determine the net power delivered by the steam power plant to the generator.
4) Calculate the efficiency of the steam power plant.
Part two :
If the steam power plant is connected to a generator that is with 95% efficiency.
1) Determine the output energy of the generator.
2) Calculate the total efficiency of the combined turbine and generator system.
3) Critically compare how changes in the thermal efficiency of a heat transfer process can affect its performance
Transcribed Image Text:> Part two:
If the steam power plant is connected to a generator that is with 95% efficiency.
1) Determine the output energy of the generator.
2) Calculate the total efficiency of the combined turbine and generator system.
3) Critically compare how changes in the thermal efficiency of a heat transfer process can affect its performance.
Steam
Turbine
Electrical
Input Energy
Output Energy
Generator
Shaft
Figure 5: Basic steam turbine and generator in power plant
Transcribed Image Text:Task IV
A natural gas-fired steam power plant consumes 360 kg/min of natural gas. If the heat losses to the surrounding air
from the steam as it passes through pipes and other components are estimated to be about 100 GJ/h . The heating
value of the natural gas is 45,000 kJ/kg.
Boiler
Turbine
W,
Steam circuit
T
Pump
Condenser
tem
Figure 4: Stem Power plant
Part 1:
1) Determine the rate of the heat supplied by the fuel to the steam plant.
2) Determine the rate of waste heat rejection by the seam plant.
3) Determine the net power delivered by the steam power plant to the generator.
4) Calculate the efficiency of the steam power plant.
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