Combined cycle gas plant - Revision history

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energy>Jmdonev at 04:13, 6 March 2020

2020-03-06T04:13:36Z

← Older revision		Revision as of 04:13, 6 March 2020
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	[[Category:Done ~~2018~~-08-03]]		[[Category:Done 2020-02-29]]
	[[File:Shazand_Combined-cycle_power_plant.JPG\|300px\|thumb\|Figure 1. Combined cycle gas plant in Iran.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/f/fd/Shazand_Combined-cycle_power_plant.JPG</ref>]]		[[File:Shazand_Combined-cycle_power_plant.JPG\|300px\|thumb\|Figure 1. Combined cycle gas plant in Iran.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/f/fd/Shazand_Combined-cycle_power_plant.JPG</ref>]]

	<onlyinclude>'''Combined cycle gas plants''' are a type of [[natural gas power plant]] used to [[generate electricity]], consisting of a [[simple cycle gas plant]] in combination with a second [[external heat engine\|steam engine]] that uses the [[Rankine cycle]].</onlyinclude> The hot exhaust ~~gases~~ from the initial [[gas turbine]] are sent to the steam engine, and the [[heat]] from them is used to generate [[steam]]. This steam can then expand through another [[turbine]], generating even more [[electricity]] and increasing the plant's overall [[efficiency]]. The efficiency of these plants can be as great as 55%.<ref name=ieso>IESO, ''Natural Gas - Simple/Combined Cycle Generation'' [Online], Available: http://www.powerauthority.on.ca/current-electricity-contracts/sc-cc</ref>		<onlyinclude>'''Combined cycle gas plants''' are a type of [[natural gas power plant]] used to [[generate electricity]], consisting of a [[simple cycle gas plant]] in combination with a second [[external heat engine\|steam engine]] that uses the [[Rankine cycle]].</onlyinclude> The hot [[exhaust gas]]es from the initial [[gas turbine]] are sent to the steam engine, and the [[heat]] from them is used to generate [[steam]]. This steam can then expand through another [[turbine]], generating even more [[electricity]] and increasing the plant's overall [[efficiency]]. The efficiency of these plants can be as great as 55%<ref name=ieso>IESO, ''Natural Gas - Simple/Combined Cycle Generation'' [Online], Available: http://www.powerauthority.on.ca/current-electricity-contracts/sc-cc</ref>, but the [[Dispatchable source of electricity#Dispatch times\|dispatch times]] tend to be slower than simple cycle [[natural gas]] plants. The combined cycle typically has an increased cost. The EIA estimated that for a simple cycle plant the cost is about US$389/[[watt\|kW]], whereas combined cycle plants are US$500 – 550/kW.<ref>Paul Breeze. (2005) ''Power Generation Technologies'' [Online Book], Available: https://books.google.co.uk/books?id=D9qSDgTbRZoC&pg=PA59&dq=%22Simple+cycle+combustion+turbine%22&hl=en&sa=X&ei=8A4sUYaND4vA9QSSqIDIDw#v=onepage&q=%22Simple%20cycle%20combustion%20turbine%22&f=false</ref>

	~~The combined cycle plant takes advantage of the capabilities of~~ the ~~single cycle, in that it can provide [[peaking power]] due to its quick~~ [[~~dispatchable~~ source of electricity\|dispatch ~~time~~]]~~. In addition,~~ to ~~it is able to provide intermediate power from the steam engine.<ref name=ieso/> Some modern combined~~ cycle ~~plants can achieve effiencies slightly over 60%, with dispatch times around half an hour.<ref>Siemens, ''Efficiency Record of Combined Cycle Power Plant''~~ [~~Online~~]~~, Available: http://www~~.~~siemens.com/innovation/en/news/2011/efficiency-record-of-combined-cycle-power-plant.htm</ref>~~

	~~With these advantages, the~~ combined cycle typically has an increased cost. The EIA estimated that for a simple cycle plant the cost is about US$389/[[watt\|kW]], whereas combined cycle plants are US$500 – 550/kW.<ref>Paul Breeze. (2005) ''Power Generation Technologies'' [Online Book], Available: https://books.google.co.uk/books?id=D9qSDgTbRZoC&pg=PA59&dq=%22Simple+cycle+combustion+turbine%22&hl=en&sa=X&ei=8A4sUYaND4vA9QSSqIDIDw#v=onepage&q=%22Simple%20cycle%20combustion%20turbine%22&f=false</ref>

	==Operation==		==Operation==

	The first part of the plant operates by use of a gas turbine and the details can be explored on its [[gas turbine\|page]]. ~~Basically~~ it works by compressing air, injecting fuel and igniting the mixture, which expands through the turbine causing it to spin. This turbine is connected to a [[generator]], which then causes electricity to flow. This process creates hot exhaust gases, which are typically dispelled in a simple cycle plant.		The first part of the plant operates by use of a gas turbine and the details can be explored on its [[gas turbine\|page here]]. Essentially, it works by compressing air, injecting [[fuel]] and [[Combustion\|igniting the mixture]], which expands through the turbine causing it to spin. This turbine is connected to a [[generator]], which then causes electricity to flow. This process creates hot exhaust gases, which are typically dispelled in a simple cycle plant (releasing [[waste heat]]).

	The exhaust gases are made to flow towards the next unit, called the '''heat recovery steam generator''' (HRSG).<ref name=wart>Wartsila, ''Combined Cycle Plant for Power Generation: Introduction'' [Online], Available: http://www.wartsila.com/power-plants/learning-center/technical-comparisons/combined-cycle-plant-for-power-generation-introduction</ref> The HRSG is essentially a [[heat exchanger]], in which the hot gases [[boiling point\|boil]] pre-heat water into steam. The ''steam then expands through a turbine'', generating electricity. Once the steam has passed through, it condenses and is recycled through.		The exhaust gases are made to flow towards the next unit, called the '''heat recovery steam generator''' (HRSG).<ref name=wart>Wartsila, ''Combined Cycle Plant for Power Generation: Introduction'' [Online], Available: http://www.wartsila.com/power-plants/learning-center/technical-comparisons/combined-cycle-plant-for-power-generation-introduction</ref> The HRSG is essentially a [[heat exchanger]], in which the [[heat]] from the hot gases is used to [[boiling point\|boil]] pre-heat [[water]] into [[steam]]. The ''steam then expands through a turbine'', generating electricity. Once the steam has passed through, it [[condensation\|condenses]] and is recycled through.

	A short video from the Tennessee Valley Authority<ref>Taken from 'http://www.tva.gov/power/comb_cycle_video.htm', accessed June 12th, 2015. This video is used under creative commons license found here: https://en.wikipedia.org/wiki/File:Combined_cycle_animation.ogv (accessed June 12th, 2015 as well).</ref> visualizing the process can be seen below:		A short video from the Tennessee Valley Authority<ref>Taken from 'http://www.tva.gov/power/comb_cycle_video.htm', accessed June 12th, 2015. This video is used under creative commons license found here: https://en.wikipedia.org/wiki/File:Combined_cycle_animation.ogv (accessed June 12th, 2015 as well).</ref> visualizing the process can be seen below:

Jmdonev: 1 revision imported

2018-09-03T22:23:33Z

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energy>Jmdonev at 20:29, 31 July 2018

2018-07-31T20:29:40Z

← Older revision		Revision as of 20:29, 31 July 2018
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	[[Category:Done ~~2015~~-07-01]]		[[Category:Done 2018-08-03]]
	[[File:Shazand_Combined-cycle_power_plant.JPG\|300px\|thumb\|Figure 1. Combined cycle gas plant in Iran.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/f/fd/Shazand_Combined-cycle_power_plant.JPG</ref>]]		[[File:Shazand_Combined-cycle_power_plant.JPG\|300px\|thumb\|Figure 1. Combined cycle gas plant in Iran.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/f/fd/Shazand_Combined-cycle_power_plant.JPG</ref>]]

	<onlyinclude>'''Combined cycle gas plants''' are a type of [[natural gas power plant]] used to [[generate electricity]], consisting of a [[simple cycle gas plant]] in combination with a second [[external heat engine\|steam engine]] that uses the [[Rankine cycle]].</onlyinclude> The hot exhaust gases from the initial [[gas turbine]] are sent to the steam engine, and the [[heat]] from them is used to generate [[steam]]. This steam can then expand through a [[turbine]], generating even more [[electricity]] and increasing the plant's overall [[efficiency]]. The efficiency of these plants can be as great as 55%.<ref name=ieso>IESO, ''Natural Gas - Simple/Combined Cycle Generation'' [Online], Available: http://www.powerauthority.on.ca/current-electricity-contracts/sc-cc</ref>		<onlyinclude>'''Combined cycle gas plants''' are a type of [[natural gas power plant]] used to [[generate electricity]], consisting of a [[simple cycle gas plant]] in combination with a second [[external heat engine\|steam engine]] that uses the [[Rankine cycle]].</onlyinclude> The hot exhaust gases from the initial [[gas turbine]] are sent to the steam engine, and the [[heat]] from them is used to generate [[steam]]. This steam can then expand through another [[turbine]], generating even more [[electricity]] and increasing the plant's overall [[efficiency]]. The efficiency of these plants can be as great as 55%.<ref name=ieso>IESO, ''Natural Gas - Simple/Combined Cycle Generation'' [Online], Available: http://www.powerauthority.on.ca/current-electricity-contracts/sc-cc</ref>

	The combined cycle plant takes advantage of the capabilities of the single cycle, in that it can provide [[peaking power]] due to its quick [[dispatchable source of electricity\|dispatch time]], ~~in addition~~ to it ~~also being~~ able to provide intermediate power from the steam engine.<ref name=ieso/> Some modern combined cycle plants can achieve effiencies slightly over 60%, with dispatch times around half an hour.<ref>Siemens, ''Efficiency Record of Combined Cycle Power Plant'' [Online], Available: http://www.siemens.com/innovation/en/news/2011/efficiency-record-of-combined-cycle-power-plant.htm</ref>		The combined cycle plant takes advantage of the capabilities of the single cycle, in that it can provide [[peaking power]] due to its quick [[dispatchable source of electricity\|dispatch time]]. In addition, to it is able to provide intermediate power from the steam engine.<ref name=ieso/> Some modern combined cycle plants can achieve effiencies slightly over 60%, with dispatch times around half an hour.<ref>Siemens, ''Efficiency Record of Combined Cycle Power Plant'' [Online], Available: http://www.siemens.com/innovation/en/news/2011/efficiency-record-of-combined-cycle-power-plant.htm</ref>

	With these advantages, the combined cycle typically has an increased cost. The EIA estimated that for a simple cycle plant the cost is about US$389/[[watt\|kW]], whereas combined cycle plants are US$500 – 550/kW.<ref>Paul Breeze. (2005) ''Power Generation Technologies'' [Online Book], Available: https://books.google.co.uk/books?id=D9qSDgTbRZoC&pg=PA59&dq=%22Simple+cycle+combustion+turbine%22&hl=en&sa=X&ei=8A4sUYaND4vA9QSSqIDIDw#v=onepage&q=%22Simple%20cycle%20combustion%20turbine%22&f=false</ref>		With these advantages, the combined cycle typically has an increased cost. The EIA estimated that for a simple cycle plant the cost is about US$389/[[watt\|kW]], whereas combined cycle plants are US$500 – 550/kW.<ref>Paul Breeze. (2005) ''Power Generation Technologies'' [Online Book], Available: https://books.google.co.uk/books?id=D9qSDgTbRZoC&pg=PA59&dq=%22Simple+cycle+combustion+turbine%22&hl=en&sa=X&ei=8A4sUYaND4vA9QSSqIDIDw#v=onepage&q=%22Simple%20cycle%20combustion%20turbine%22&f=false</ref>
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	==Operation==		==Operation==

	The first part of the plant operates by use of a gas turbine~~. The~~ details can be explored on its [[gas turbine\|page]]~~, but basically~~ it works by compressing air, injecting fuel and igniting the mixture, which expands through the turbine causing it to spin. This turbine is connected to a [[generator]], which then causes electricity to flow. This process creates hot exhaust gases, which are typically dispelled in a simple cycle plant.		The first part of the plant operates by use of a gas turbine and the details can be explored on its [[gas turbine\|page]]. Basically it works by compressing air, injecting fuel and igniting the mixture, which expands through the turbine causing it to spin. This turbine is connected to a [[generator]], which then causes electricity to flow. This process creates hot exhaust gases, which are typically dispelled in a simple cycle plant.

	The exhaust gases are made to flow towards the next unit, called the '''heat recovery steam generator''' (HRSG).<ref name=wart>Wartsila, ''Combined Cycle Plant for Power Generation: Introduction'' [Online], Available: http://www.wartsila.com/power-plants/learning-center/technical-comparisons/combined-cycle-plant-for-power-generation-introduction</ref> The HRSG is essentially a [[heat exchanger]], in which the hot gases [[boiling point\|boil]] pre-~~heated~~ water into steam. The steam then expands through a turbine, generating electricity. Once the steam has passed through, it condenses and is recycled through.		The exhaust gases are made to flow towards the next unit, called the '''heat recovery steam generator''' (HRSG).<ref name=wart>Wartsila, ''Combined Cycle Plant for Power Generation: Introduction'' [Online], Available: http://www.wartsila.com/power-plants/learning-center/technical-comparisons/combined-cycle-plant-for-power-generation-introduction</ref> The HRSG is essentially a [[heat exchanger]], in which the hot gases [[boiling point\|boil]] pre-heat water into steam. The ''steam then expands through a turbine'', generating electricity. Once the steam has passed through, it condenses and is recycled through.

	A short video from the Tennessee Valley Authority<ref>Taken from 'http://www.tva.gov/power/comb_cycle_video.htm', accessed June 12th, 2015. This video is used under creative commons license found here: https://en.wikipedia.org/wiki/File:Combined_cycle_animation.ogv (accessed June 12th, 2015 as well).</ref> visualizing the process can be seen below:		A short video from the Tennessee Valley Authority<ref>Taken from 'http://www.tva.gov/power/comb_cycle_video.htm', accessed June 12th, 2015. This video is used under creative commons license found here: https://en.wikipedia.org/wiki/File:Combined_cycle_animation.ogv (accessed June 12th, 2015 as well).</ref> visualizing the process can be seen below:
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	<iframe src="//commons.wikimedia.org/wiki/File:Combined_cycle_animation.ogv?embedplayer=yes" width="813" height="480" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>		<iframe src="//commons.wikimedia.org/wiki/File:Combined_cycle_animation.ogv?embedplayer=yes" width="813" height="480" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>
	</html>		</html>
			==For Further Reading==
			*[[Simple cycle gas plant]]
			*[[Gas turbine]]
			*[[Cogeneration]]
			*[[Steam]]
			*[[Heat exchanger]]
			*Or explore a [[Special:Random\|random page]]

	==References==		==References==
	{{reflist}}		{{reflist}}
	[[Category:Uploaded]]		[[Category:Uploaded]]

J.williams: 1 revision imported

2015-08-26T21:30:55Z

1 revision imported

← Older revision	Revision as of 21:30, 26 August 2015
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J.williams at 16:52, 12 August 2015

2015-08-12T16:52:57Z

New page

[[Category:Done 2015-07-01]]
[[File:Shazand_Combined-cycle_power_plant.JPG|300px|thumb|Figure 1. Combined cycle gas plant in Iran.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/f/fd/Shazand_Combined-cycle_power_plant.JPG</ref>]]

<onlyinclude>'''Combined cycle gas plants''' are a type of [[natural gas power plant]] used to [[generate electricity]], consisting of a [[simple cycle gas plant]] in combination with a second [[external heat engine|steam engine]] that uses the [[Rankine cycle]].</onlyinclude> The hot exhaust gases from the initial [[gas turbine]] are sent to the steam engine, and the [[heat]] from them is used to generate [[steam]]. This steam can then expand through a [[turbine]], generating even more [[electricity]] and increasing the plant's overall [[efficiency]]. The efficiency of these plants can be as great as 55%.<ref name=ieso>IESO, ''Natural Gas - Simple/Combined Cycle Generation'' [Online], Available: http://www.powerauthority.on.ca/current-electricity-contracts/sc-cc</ref>

The combined cycle plant takes advantage of the capabilities of the single cycle, in that it can provide [[peaking power]] due to its quick [[dispatchable source of electricity|dispatch time]], in addition to it also being able to provide intermediate power from the steam engine.<ref name=ieso/> Some modern combined cycle plants can achieve effiencies slightly over 60%, with dispatch times around half an hour.<ref>Siemens, ''Efficiency Record of Combined Cycle Power Plant'' [Online], Available: http://www.siemens.com/innovation/en/news/2011/efficiency-record-of-combined-cycle-power-plant.htm</ref>

With these advantages, the combined cycle typically has an increased cost. The EIA estimated that for a simple cycle plant the cost is about US$389/[[watt|kW]], whereas combined cycle plants are US$500 – 550/kW.<ref>Paul Breeze. (2005) ''Power Generation Technologies'' [Online Book], Available: https://books.google.co.uk/books?id=D9qSDgTbRZoC&pg=PA59&dq=%22Simple+cycle+combustion+turbine%22&hl=en&sa=X&ei=8A4sUYaND4vA9QSSqIDIDw#v=onepage&q=%22Simple%20cycle%20combustion%20turbine%22&f=false</ref>

==Operation==

The first part of the plant operates by use of a gas turbine. The details can be explored on its [[gas turbine|page]], but basically it works by compressing air, injecting fuel and igniting the mixture, which expands through the turbine causing it to spin. This turbine is connected to a [[generator]], which then causes electricity to flow. This process creates hot exhaust gases, which are typically dispelled in a simple cycle plant.

The exhaust gases are made to flow towards the next unit, called the '''heat recovery steam generator''' (HRSG).<ref name=wart>Wartsila, ''Combined Cycle Plant for Power Generation: Introduction'' [Online], Available: http://www.wartsila.com/power-plants/learning-center/technical-comparisons/combined-cycle-plant-for-power-generation-introduction</ref> The HRSG is essentially a [[heat exchanger]], in which the hot gases [[boiling point|boil]] pre-heated water into steam. The steam then expands through a turbine, generating electricity. Once the steam has passed through, it condenses and is recycled through.

A short video from the Tennessee Valley Authority<ref>Taken from 'http://www.tva.gov/power/comb_cycle_video.htm', accessed June 12th, 2015. This video is used under creative commons license found here: https://en.wikipedia.org/wiki/File:Combined_cycle_animation.ogv (accessed June 12th, 2015 as well).</ref> visualizing the process can be seen below:

<html>
<iframe src="//commons.wikimedia.org/wiki/File:Combined_cycle_animation.ogv?embedplayer=yes" width="813" height="480" frameborder="0" webkitAllowFullScreen mozallowfullscreen allowFullScreen></iframe>
</html>

==References==
{{reflist}}
[[Category:Uploaded]]