Some basic questions about the second law efficiency (gas turbine cycle)

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SUMMARY

The discussion centers on the relationship between first law efficiency and second law efficiency in gas turbine cycles. It establishes that the first and second laws of thermodynamics are independent, with no direct proportionality between their efficiencies. Key factors affecting second law efficiency in gas turbines include inlet and exit temperatures of the compressor and turbine inlet temperature. Understanding these principles is crucial for analyzing the performance of gas turbine systems.

PREREQUISITES
  • Understanding of the Laws of Thermodynamics
  • Knowledge of gas turbine cycle operations
  • Familiarity with concepts of first law and second law efficiency
  • Basic thermodynamic principles, including entropy
NEXT STEPS
  • Research the impact of inlet and exit temperatures on gas turbine efficiency
  • Study the concept of entropy in thermodynamic processes
  • Explore advanced gas turbine cycle analysis techniques
  • Learn about the application of the Carnot efficiency in real-world systems
USEFUL FOR

Engineers, thermodynamics students, and professionals involved in the design and optimization of gas turbine systems will benefit from this discussion.

amir star
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hi ,

will change first law efficiency proportional to second law efficiency?

for example in gas turbine cycle, how change?

other equation:

hi ,

will change first law efficiency proportional to second law efficiency?

for example in gas turbine cycle, how change?

other equation:

How is the analysis the second law efficiency of combustion chamber in the cycle gas turbine?
in fact, It depends on what factors (inlet and exit temperature compressor and turbine inlet temperature ,...)?

tank you for your help.
 
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I assume you're referring to the Laws of Thermodynamics. The first and second laws are independent; neither of these laws refers to the other, and there are no unspoken linear relationships between the two that I'm aware of.

Simply put, the first and second laws are:

  1. Conservation of energy between input, output, and storage of a system. Basically energy has to "go" somewhere and can be neither created nor destroyed.
  2. Process irreversibility- in a thermodynamic process there is an increase in the net entropy of the participating systems.
Wikipedia: Laws of Thermodynamics
 
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