How does the Brayton and Rankine Cycle differ from the Allam Cycle ? As I understand it (from memory), the efficiencies are similar between combined and Allam, except that carbon capture is inherent in the latter (which removes water/steam state changes from the process), whereas for the former it imposes a post-generation cost of 20-30% (or more) on overall efficiency. There's already at least one plant under construction using the latter.
From what I reviewed the Allam cycle si a modified Brayton cycle. It uses CO2 as working fluid. In my mind the water is used to keep temperatures in the turbine at a right temperature. The excess CO2 is a by product of the cycle. Efficiencies I have found (~51%) are still lower than combined cycle (~62%). Thanks for bringing to my attention this technology. I will share with my students
César Gutiérrez PR You're very welcome (+1), but AFAIK even though the front end efficiency is slightly lower, that is misleading because the negative difference is offset several times over on the plus side by the built-in carbon capture (vs the high cost to do the same on a post-gen basis in combined cycle). If the analogy were accounting, it is like the difference between a sub-total and a grand-total ... the former is not the whole picture. Zooming out to the power industry level, I have no dog in this fight, and this is a little out of my wheelhouse on science, but I can still see the potential advantages, esp from a long term environmental standpoint, so it is interesting to follow the news on things like this.
thank you for your presentation and your effort I have one note you are forget that the air after mixed with air and fuel inside cc go throw turbine as exhausts gas not air also the same concept at HRSG THANK YOU
Thank you for your note. We are using the approximation of air standard assumption. Since air fuel ratio for gas turbines is very high we can can consider the inlet an oultet to be just air. Regards César
Amazing video thank you very much. Is this problem from a textbook ? If so I would like to know which textbook as I would like to practice more of these questions.
Dear Sir, Your concept is good but your writing is not understandable, please do something that helps us to understand your handwriting. Your faithfully
7 years ago woww, thank you
How to find the pressure between the turbines?
How does the Brayton and Rankine Cycle differ from the Allam Cycle ?
As I understand it (from memory), the efficiencies are similar between combined and Allam, except that carbon capture is inherent in the latter (which removes water/steam state changes from the process), whereas for the former it imposes a post-generation cost of 20-30% (or more) on overall efficiency.
There's already at least one plant under construction using the latter.
From what I reviewed the Allam cycle si a modified Brayton cycle. It uses CO2 as working fluid. In my mind the water is used to keep temperatures in the turbine at a right temperature. The excess CO2 is a by product of the cycle.
Efficiencies I have found (~51%) are still lower than combined cycle (~62%). Thanks for bringing to my attention this technology. I will share with my students
César Gutiérrez PR You're very welcome (+1), but AFAIK even though the front end efficiency is slightly lower, that is misleading because the negative difference is offset several times over on the plus side by the built-in carbon capture (vs the high cost to do the same on a post-gen basis in combined cycle). If the analogy were accounting, it is like the difference between a sub-total and a grand-total ... the former is not the whole picture.
Zooming out to the power industry level, I have no dog in this fight, and this is a little out of my wheelhouse on science, but I can still see the potential advantages, esp from a long term environmental standpoint, so it is interesting to follow the news on things like this.
thank you for your presentation and your effort I have one note you are forget that the air after mixed with air and fuel inside cc go throw turbine as exhausts gas not air also the same concept at HRSG THANK YOU
Thank you for your note. We are using the approximation of air standard assumption. Since air fuel ratio for gas turbines is very high we can can consider the inlet an oultet to be just air.
Regards César
Amazing video thank you very much. Is this problem from a textbook ? If so I would like to know which textbook as I would like to practice more of these questions.
Yes, Moran and Shapira Thermodynamics Engineering 5th ed
Could have taught more precisely
Dear Sir,
Your concept is good but your writing is not understandable, please do something that helps us to understand your handwriting.
Your faithfully
Thank you for your comment. I already found a better way to write (One note) that let me have a slighter better handwriting.
@@cesargutierrezpr2508 sir please don't take my word personal I respect you lot 🙏
@@aryanvardhan1161 don't sorry, I don't takenit personal. I appreciate any feedback. Than You