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

In summary, the first and second laws of thermodynamics are independent and there are no linear relationships between them. The first law states that energy cannot be created or destroyed, only transferred or converted. The second law states that in any thermodynamic process, there is an increase in the net entropy of the participating systems.
  • #1
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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  • #2
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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FAQ: Some basic questions about the second law efficiency (gas turbine cycle)

What is the second law efficiency of a gas turbine cycle?

The second law efficiency of a gas turbine cycle is a measure of how well the cycle converts heat energy into mechanical work. It takes into account the irreversibilities and losses in the cycle, such as friction and heat transfer.

How is the second law efficiency of a gas turbine cycle calculated?

The second law efficiency of a gas turbine cycle can be calculated using the equation: Efficiency = (Work output of the cycle) / (Maximum work output possible)

What factors affect the second law efficiency of a gas turbine cycle?

The second law efficiency of a gas turbine cycle is affected by various factors, including the temperature of the heat source, the temperature of the heat sink, the pressure ratio, and the design and components of the cycle.

Why is the second law efficiency of a gas turbine cycle important?

The second law efficiency of a gas turbine cycle is important because it helps to determine the overall efficiency and performance of the cycle. It also helps in identifying areas for improvement and optimization of the cycle.

How can the second law efficiency of a gas turbine cycle be improved?

The second law efficiency of a gas turbine cycle can be improved by increasing the temperature of the heat source, reducing the temperature of the heat sink, and minimizing the losses and irreversibilities in the cycle through design and operational improvements.

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