Exergy analysis gas turbine cycle For EEs

In summary, the exergy efficiency of a gas turbine cycle decreases with increasing ambient temperature.
  • #1
amir star
6
0
hi friends,

I am working EES software for thermodynamic lesson,I am analyzing second law efficiency(exergy efficiency) and exergy analysis for all components of gas turbine cycle.

Now I have a problem,exergy efficiency of turbine decrease with increasing before temperature,why?

As you know, with increasing before temperature of turbine, increase work of turbine, so increase exergy efficiency of turbine.am I correct saying?

too, I have another problem,exergy efficiency of turbine decrease with increasing before temperature,why?

with increasing before temperature of compressor , decrease work of compressor , so decrease exergy efficiency of compressor .

have you articles that relate to obtain exergy of components gas turbine cycle?...I am searching but anything finding well, in fact I want to my code validate with articles.
another Question...

according to following article, exergy efficiency of Ideal air-standard simple cycle increase with increasing ambient temperature but For me(code that write) decrease.why?

and Exergy destroyed of cycle decrease with increasing ambient temperature but for me increase.why?

process of compressor and turbine consider constant entropy and Ideal air-standard simple cycle.

I think everything I observe.

http://0up.ir/up10/guest/1_7cf9a.rar

in fact, I am programing in EEs, Now I have some problem,

problem described in previous posts,

gas turbine cycle is as follows:



http://www.upload7.ir/imgs/2014-12/86515550666943192076.jpg

and equations:
compressor:

http://www.upload7.ir/imgs/2014-12/26181649452134491050.jpg

turbine:

http://www.upload7.ir/imgs/2014-12/69904976515215219246.jpg

< Questionable link deleted by Moderators >
 
Last edited by a moderator:
  • #3
hi,

thanks for answer,

I want to valid conclusions in bellow Paper but not valid, thanks for your guide , wrote Cod in software EEs also attached,Do you working with software EEs?

attention to seventh page from paper , Four efficiency must be reduced but diagrams of out of EEs is not.

thanks

Paper:

http://0up.ir/up10/guest/6_ca7e4.pdfCODE:

http://0up.ir/up10/guest/sssss2_48e9d.rar
 
Last edited:

1. What is exergy analysis and why is it important in gas turbine cycles for electrical engineers?

Exergy analysis is a method used to evaluate the efficiency and performance of energy conversion systems, such as gas turbine cycles. It takes into account both the quantity and quality of energy, providing a more comprehensive understanding of the thermodynamic processes involved. For electrical engineers, exergy analysis is important because it allows for the identification of areas in the cycle where energy losses occur, helping to improve the overall efficiency of the system.

2. How is exergy different from energy?

Energy is a measure of the ability to do work, while exergy is a measure of the potential to do work. Energy is conserved in a closed system, but exergy is not, as it takes into account the quality of energy and the irreversibilities in the system. Exergy analysis allows for a more accurate evaluation of the efficiency and performance of energy conversion systems.

3. What are the main components of a gas turbine cycle that are analyzed in exergy analysis?

The main components of a gas turbine cycle that are analyzed in exergy analysis include the compressor, combustor, turbine, and heat exchangers. These components are responsible for the conversion of energy and are where the majority of energy losses occur. By analyzing each component, engineers can identify areas for improvement and increase the overall efficiency of the cycle.

4. How does exergy analysis help in the design and optimization of gas turbine cycles?

Exergy analysis helps in the design and optimization of gas turbine cycles by providing a more thorough understanding of the thermodynamic processes involved. Engineers can use this information to identify areas for improvement and make design changes that will increase the overall efficiency of the system. Exergy analysis also allows for the comparison of different designs to determine which one is more efficient.

5. Are there any limitations to exergy analysis in gas turbine cycles for electrical engineers?

While exergy analysis is a powerful tool for evaluating gas turbine cycles, it does have some limitations. It requires detailed and accurate data, which can be difficult to obtain in real-world applications. It also does not take into account economic factors, such as cost and availability of resources, which may also impact the design and optimization of the cycle. Therefore, exergy analysis should be used in conjunction with other methods to fully evaluate the performance of gas turbine cycles.

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