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General Science => General Science => Topic started by: futur123 on 13/06/2022 12:01:08

Title: How to calculate overall efficiency of combined cycle power plants
Post by: futur123 on 13/06/2022 12:01:08

Is there any good books/articles where i can find a thermodynamic analysis of a combined cycle power plant to establish the overall efficiency equation, just like Brayton or Rankine cycle.

Title: Re: How to calculate overall efficiency of combined cycle power plants
Post by: Origin on 13/06/2022 13:12:14

 https://web.mit.edu/16.unified/www/FALL/thermodynamics/notes/node67.html (https://web.mit.edu/16.unified/www/FALL/thermodynamics/notes/node67.html)

There are several other sites that go into more detail.  Just google:  'Calculating the efficiency of combined cycle power plant'.

Title: Re: How to calculate overall efficiency of combined cycle power plants
Post by: futur123 on 13/06/2022 13:33:03

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Quote from: Origin on 13/06/2022 13:12:14

There are several other sites that go into more detail.  Just google:  'Calculating the efficiency of combined cycle power plant'.

Well thank you for your answer.I found this equation too (in the picture) ,where the HRSG (steam generator) efficiency  takes place ( ε ).

Title: Re: How to calculate overall efficiency of combined cycle power plants
Post by: Origin on 13/06/2022 13:41:33

Thanks for discussing the combined cycle power plants, I had not heard of them. It is a great idea.

Title: Re: How to calculate overall efficiency of combined cycle power plants
Post by: wolfekeeper on 15/08/2022 02:02:18

If it was really a great idea, Russia wouldn't currently have the world's balls in a vice, and the climate wouldn't be getting ever hotter.

Title: Re: How to calculate overall efficiency of combined cycle power plants
Post by: Petrochemicals on 17/08/2022 22:25:31

As far as I understand the main process in commercial powerplants is to cool  the environment the steam turbine vents into. Cooling the outflow ie atmospheric pressure means a higher energy yield from the initial burn and also means that the liquid water can be fed once again into the system at a higher temperature, lowering energy needs and raising efficiency. 

There is however the very clever theory on local heat distribution, waste water is taken and fed to the local populace as heating water. Localised energy generation plants yield as much as 90 percent efficiency, which would curb the uk energy usage by at least 330 twh equivalents  per year of gas healing or 10 percent of our energy usage.That is a combined cycle that is present in scandinavia.

Title: Re: How to calculate overall efficiency of combined cycle power plants
Post by: Petrochemicals on 17/08/2022 22:29:24

Quote from: wolfekeeper on 15/08/2022 02:02:18

If it was really a great idea, Russia wouldn't currently have the world's balls in a vice, and the climate wouldn't be getting ever hotter.

Tony Blair Angela merkel, Helmut cole Nicolas serxosi and the EU are to blame for that. They got rid of the coal plants entirely. Surely you would have kept them as a back up. Energy independence has always been a military prerequisite  God bless the USA