Talk:Combined cycle power plant

Costs given as way too high

As for avoided CO2 costs, most of the literature that I come up with, eg http://www.gasification.org/Docs/2002_Papers/GTC02030.pdf (slide 25), http://www.climatevision.gov/pdfs/coal_roundtable/dalton.pdf (slide 23) http://www.netl.doe.gov/publications/proceedings/01/carbon_seq_wksp/David-Herzog.pdf (page 3, last line of table), IPCC special (report http://www.ipcc.ch/activity/srccs/SRCCS_Chapter8.pdf) page 38; the MIT coal study, talks of avoided costs in the $18-27 range for CO2 (will be 3.66 times higher for C). These are all without EOR, depending on local situations. also, these are mostly costs avoided, not captured, though a couple of resources do not mention the difference. The IGCC report says upto $14-$53 but that is the outer limit.

I don’t know who wrote this or when but if nobody replies to me I guess it will be archived eventually. Is this still relevent? Chidgk1 (talk) 06:29, 5 October 2024 (UTC)

Combined Cycle Combustion Engine

This article is supposed to be information about Combined Cycle Systems, however it focuses almost exclusively on Gas Turbine units. Many small modular systems distributed outside the USA/EU use Combined Cycle Combustion Engines CCCE usually with a large Diesel internal combustion engine as the primary cycle and a steam plant running off of the exhaust heat as the secondary cycle. These systems are also very energy efficient rating just a few percentage points below CCGT (54%) with CCCE rating 51%. CCCE have advantages and disadvantages compared to CCGT the primary advantage being they can run on a much broader spectrum of fuel inputs without excessive wear or higher maintenance cycle rates being required.

See http://www.wartsila.com/media/news/29-09-2006-wartsila-bio-engines-drive-italian-green-power for a biofuel modular plant in Italy.

See http://powerplants.man.eu/solutions/combined-cycle for MAN diesel combined cycle power plant examples in multiple countries.

See http://www.wartsila.com/energy/references/europe/aliaga-turkey For a Wartsila Diesel Combined Cycle power plant burning Natural Gas fuel.

Tanada (talk) 12:13, 8 May 2016 (UTC) Tanada May 08, 2016

It would be good to get some sources that are independent of the manufacturers. Kendall-K1 (talk) 12:23, 8 May 2016 (UTC)

Mitsubishi-Hitachi efficiency

Don't know enough about this to say if it is true, but Mitsubishi is claiming >63% LHV for the M501JAC certain others of their J-series turbines.. should this trigger an article update? 98.117.67.55 (talk) 04:32, 16 January 2017 (UTC)

see http://www.mpshq.com/j-series.html

I stuck this in. We might want to remove some of the older efficiency claims, as this section is getting crowded. Kendall-K1 (talk) 05:11, 16 January 2017 (UTC)

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math error

The error is in the introduction that states as quoted below that the efficiency increases fifty percent. The actual increase, again as quoted, is 100% (meaning doubled). A fifty percent increase from 34% would be 34+17=51%. Either the fifty should become 100 or the 62.22 should be reduced.

Secondly, the precision "62.22%" seems quite overly detailed and mathematically in error, and should be reduced to only sixty-two percent.

By combining these multiple streams of work upon a single mechanical shaft turning an electric generator, the overall net efficiency of the system may be increased by 50–60%. That is, from an overall efficiency of say 34% (in a single cycle) to possibly an overall efficiency of 62.22% (in a mechanical combination of two cycles) in net Carnot thermodynamic efficiency. — Preceding unsigned comment added by 23.249.100.250 (talk) 19:21, 21 September 2018 (UTC)

That sentence in the article needs to be rewritten. I don't know anything about the subject so I can't really help. It now says "[...] to possibly an overall efficiency of 62% (combined cycle), 84% Theoretical efficiency (Carnot cycle)" and ends like that. I'm not even sure what it's supposed to mean. Aeluwas (talk) 15:33, 15 June 2019 (UTC)

Somebody fixed it I guess as I cannot find this - if not suggest you tag “clarify” Chidgk1 (talk) 07:18, 5 October 2024 (UTC)

Comparison to Carnot efficiency

The article includes a comparison to the Carnot cycle efficiency: "This is more than 84% of the theoretical efficiency of a Carnot cycle." This statement requires context of the hot/cold reservoir temperature that is assumed to calculate the Carnot cycle efficiency otherwise it is meaningless. Ideally whichever specific power plant achieves this efficiency should be linked. 212.114.178.106 (talk) 15:50, 29 December 2023 (UTC)

Feel free to improve the article but be sure to cite reliable sources Chidgk1 (talk) 06:32, 5 October 2024 (UTC)

Merge Combined cycle hydrogen power plant to here

The following discussion is closed. Please do not modify it. Subsequent comments should be made in a new section. A summary of the conclusions reached follows.

The result of this discussion was to merge. Chidgk1 (talk) 18:41, 2 October 2024 (UTC)

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Ref 3 is not working for me but as far as I can tell it is not worth a separate article Chidgk1 (talk) 17:37, 27 February 2024 (UTC)

@Jusdafax@Clayoquot Thanks for commenting on another hydrogen merger proposal - if you have an opinion on this one please comment Chidgk1 (talk) 07:26, 25 March 2024 (UTC)

The discussion above is closed. Please do not modify it. Subsequent comments should be made on the appropriate discussion page. No further edits should be made to this discussion.