Non-dispatchable source of electricity - Revision history

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	<onlyinclude>A '''non-dispatchable source of electricity''' ~~generate~~[[electrical energy]] but cannot be turned on or off in order to meet societies fluctuating electricity needs. It is the opposite of [[dispatchable source of electricity\|dispatchable sources of electricity]] which are very flexible, being able to change their output fairly quickly in order to meet electricity demands.</onlyinclude> Non-dispatchable electricity sources are often highly [[intermittent electricity\|intermittent]], which means that they are not continuously available due to factors that cannot be controlled (ex. the weather). There are many different types of non-dispatchable sources such as tidal power and wave power,<ref>EDF Energy, ''Wave power is intermittent but tide power is predictable'' [Online], Available: http://www.edfenergy.com/energyfuture/energy-gap-reliability/marine-and-the-energy-gap-reliability</ref> but two main types that contribute noticeably to the [[electrical grid]]: [[Solar power]] and [[wind power]].		<onlyinclude>A '''non-dispatchable source of electricity''' generates [[electrical energy]] but cannot be turned on or off in order to meet societies fluctuating electricity needs. It is the opposite of [[dispatchable source of electricity\|dispatchable sources of electricity]] which are very flexible, being able to change their output fairly quickly in order to meet electricity demands.</onlyinclude> Non-dispatchable electricity sources are often highly [[intermittent electricity\|intermittent]], which means that they are not continuously available due to factors that cannot be controlled (ex. the weather). There are many different types of non-dispatchable sources such as tidal power and wave power,<ref>EDF Energy, ''Wave power is intermittent but tide power is predictable'' [Online], Available: http://www.edfenergy.com/energyfuture/energy-gap-reliability/marine-and-the-energy-gap-reliability</ref> but two main types that contribute noticeably to the [[electrical grid]]: [[Solar power]] and [[wind power]].

	===Solar power===		===Solar power===

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Jmdonev at 01:15, 9 June 2018

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	<onlyinclude>A '''non-dispatchable source of electricity''' ~~is a generator of~~ [[electrical energy]] ~~that~~ cannot be turned on or off in order to meet societies fluctuating electricity needs. It is the opposite of [[dispatchable source of electricity\|dispatchable sources of electricity]] which are very flexible, being able to change their output fairly quickly in order to meet electricity demands.</onlyinclude> Non-dispatchable electricity sources are often highly [[intermittent electricity\|intermittent]], which means that they are not continuously available due to factors ~~outside direct control~~. There are many different types of non-dispatchable sources such as tidal power and wave power,<ref>EDF Energy, ''Wave power is intermittent but tide power is predictable'' [Online], Available: http://www.edfenergy.com/energyfuture/energy-gap-reliability/marine-and-the-energy-gap-reliability</ref> but two main types that contribute noticeably to the [[electrical grid]]: [[Solar power]] and [[wind power]].		<onlyinclude>A '''non-dispatchable source of electricity''' generate[[electrical energy]] but cannot be turned on or off in order to meet societies fluctuating electricity needs. It is the opposite of [[dispatchable source of electricity\|dispatchable sources of electricity]] which are very flexible, being able to change their output fairly quickly in order to meet electricity demands.</onlyinclude> Non-dispatchable electricity sources are often highly [[intermittent electricity\|intermittent]], which means that they are not continuously available due to factors that cannot be controlled (ex. the weather). There are many different types of non-dispatchable sources such as tidal power and wave power,<ref>EDF Energy, ''Wave power is intermittent but tide power is predictable'' [Online], Available: http://www.edfenergy.com/energyfuture/energy-gap-reliability/marine-and-the-energy-gap-reliability</ref> but two main types that contribute noticeably to the [[electrical grid]]: [[Solar power]] and [[wind power]].

	===Solar power===		===Solar power===
	[[File:solar farm.jpg\|thumb\|~~230px~~\|Figure 1. Solar power is non-dispatchable without an energy storage system because of cloud cover and limited daytime hours.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/4/45/Giant_photovoltaic_array.jpg</ref>]]		[[File:solar farm.jpg\|thumb\|300px\|Figure 1. Solar power is non-dispatchable without an energy storage system because of cloud cover and limited daytime hours.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/4/45/Giant_photovoltaic_array.jpg</ref>]]
	:''[[solar power\|main article]]		:''[[solar power\|main article]]

	Solar power is intermittent and most often non-dispatchable. [[Solar energy to the Earth]] is not the same in all locations, and is also affected by cloud cover. The main reason that solar power is non-dispatchable ~~however~~ is the fact that the Sun does not shine for all hours of the day in a given location.<ref>Renewable Energy World, ''Solar Intermittency: How Big is the Problem?'' [Online], Available: http://www.renewableenergyworld.com/articles/2011/11/solar-intermittency-how-big-is-the-problem.html</ref> Therefore it is impossible to make consistent use of this resource for [[electricity generation]] without the use of [[electricity storage]].		Solar power is intermittent and most often non-dispatchable. [[Solar energy to the Earth]] is not the same in all locations, and is also affected by cloud cover. The main reason that solar power is non-dispatchable is the fact that the Sun does not shine for all hours of the day in a given location.<ref>Renewable Energy World, ''Solar Intermittency: How Big is the Problem?'' [Online], Available: http://www.renewableenergyworld.com/articles/2011/11/solar-intermittency-how-big-is-the-problem.html</ref> Therefore, it is impossible to make consistent use of this resource for [[electricity generation]] without the use of [[electricity storage]].

	Since the length of days and [[weather]] effects are fairly predictable, there are [[solar thermal power plant\|power plants that use heat storage]] from the solar energy in order to produce power when the sun isn't shining.		Since the length of days and [[weather]] effects are fairly predictable, there are [[solar thermal power plant\|power plants that use heat storage]] from the solar energy in order to produce power when the sun isn't shining.

	===Wind power===		===Wind power===
	[[File:Darling_Wind_Farm.jpg\|~~200px~~\|thumb\|Figure 2. Wind power is non-dispatchable due to its high intermittency and variability.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/0/0d/Darling_Wind_Farm.jpg</ref>]]		[[File:Darling_Wind_Farm.jpg\|250px\|thumb\|Figure 2. Wind power is non-dispatchable due to its high intermittency and variability.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/0/0d/Darling_Wind_Farm.jpg</ref>]]
	:''[[wind power\|main article]]		:''[[wind power\|main article]]

	Wind power is considered highly intermittent and non-dispatchable because it is a variable power source, meaning that its electrical output depends on many factors, such as [[wind]] speed, air [[density]], [[wind turbine\|turbine]] characteristics, and more. All of these factors also change depending on location of the site. Wind speed must also be in a certain range (depending on the turbine), above 3.5 [[meters per second\|m/s]] in order to generate electricity, and below 25 m/s to avoid damage to the turbine.<ref>DASH, ''Meteorologically Defined Limits to Reduction in the Variability of Outputs from a Coupled Wind Farm System in the Central US'' [Online], Available: http://dash.harvard.edu/bitstream/handle/1/10981611/Meteorologically%20defined%20limits%20to%20reduction%20in%20the%20variability%20of%20outputs%20from%20a%20coupled%20wind%20farm%20system%20in%20the%20Central%20US_1.pdf?sequence=6</ref> When ~~taking ''multiple''~~ wind farm's intermittency ~~into consideration,~~ it would make sense that the reliability would somewhat increase, but this actually doesn't appear to be the case.<ref>~~David JC McKay, ''Sustainable energy - without the hot air''~~ [Online], Available: http://www.inference.phy.cam.ac.uk/withouthotair/c26/page_187.shtml</ref>		Wind power is considered highly intermittent and non-dispatchable because it is a variable power source, meaning that its electrical output depends on many factors, such as [[wind]] speed, air [[density]], [[wind turbine\|turbine]] characteristics, and more. All of these factors also change depending on location of the site. Wind speed must also be in a certain range (depending on the turbine), above 3.5 [[meters per second\|m/s]] in order to generate electricity, and below 25 m/s to avoid damage to the turbine.<ref>DASH, ''Meteorologically Defined Limits to Reduction in the Variability of Outputs from a Coupled Wind Farm System in the Central US'' [Online], Available: http://dash.harvard.edu/bitstream/handle/1/10981611/Meteorologically%20defined%20limits%20to%20reduction%20in%20the%20variability%20of%20outputs%20from%20a%20coupled%20wind%20farm%20system%20in%20the%20Central%20US_1.pdf?sequence=6</ref> When analyzing a wind farm's intermittency it would make sense that the reliability would somewhat increase, but this actually doesn't appear to be the case.<ref>[Online], Available: http://www.inference.phy.cam.ac.uk/withouthotair/c26/page_187.shtml</ref> The difficulty comes from the fact that electricity supply must exactly match electricity demand every second. More turbines means that it is more likely that some electricity will be produced, but not necessarily that the right amount will be.

			==For Further Reading==
			*[[Dispatchable source of electricity]]
			*[[Electricity storage]]
			*[[Electrical energy]]
			*[[Solar power]]
			*[[Wind power]]
			*Or explore a [[Special:Random\|random page]]

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

J.williams: 1 revision imported

2015-08-26T21:31:25Z

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J.williams at 16:57, 12 August 2015

2015-08-12T16:57:08Z

New page

[[category:placeholder]]
[[category:371 topics]]
[[category:301 topics]]
[[Category:Done 2015-06-11]]
<onlyinclude>A '''non-dispatchable source of electricity''' is a generator of [[electrical energy]] that cannot be turned on or off in order to meet societies fluctuating electricity needs. It is the opposite of [[dispatchable source of electricity|dispatchable sources of electricity]] which are very flexible, being able to change their output fairly quickly in order to meet electricity demands.</onlyinclude> Non-dispatchable electricity sources are often highly [[intermittent electricity|intermittent]], which means that they are not continuously available due to factors outside direct control. There are many different types of non-dispatchable sources such as tidal power and wave power,<ref>EDF Energy, ''Wave power is intermittent but tide power is predictable'' [Online], Available: http://www.edfenergy.com/energyfuture/energy-gap-reliability/marine-and-the-energy-gap-reliability</ref> but two main types that contribute noticeably to the [[electrical grid]]: [[Solar power]] and [[wind power]].

===Solar power===
[[File:solar farm.jpg|thumb|230px|Figure 1. Solar power is non-dispatchable without an energy storage system because of cloud cover and limited daytime hours.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/4/45/Giant_photovoltaic_array.jpg</ref>]]
:''[[solar power|main article]]

Solar power is intermittent and most often non-dispatchable. [[Solar energy to the Earth]] is not the same in all locations, and is also affected by cloud cover. The main reason that solar power is non-dispatchable however is the fact that the Sun does not shine for all hours of the day in a given location.<ref>Renewable Energy World, ''Solar Intermittency: How Big is the Problem?'' [Online], Available: http://www.renewableenergyworld.com/articles/2011/11/solar-intermittency-how-big-is-the-problem.html</ref> Therefore it is impossible to make consistent use of this resource for [[electricity generation]] without the use of [[electricity storage]].

Since the length of days and [[weather]] effects are fairly predictable, there are [[solar thermal power plant|power plants that use heat storage]] from the solar energy in order to produce power when the sun isn't shining.

===Wind power===
[[File:Darling_Wind_Farm.jpg|200px|thumb|Figure 2. Wind power is non-dispatchable due to its high intermittency and variability.<ref>Wikimedia Commons [Online], Available: http://upload.wikimedia.org/wikipedia/commons/0/0d/Darling_Wind_Farm.jpg</ref>]]
:''[[wind power|main article]]

Wind power is considered highly intermittent and non-dispatchable because it is a variable power source, meaning that its electrical output depends on many factors, such as [[wind]] speed, air [[density]], [[wind turbine|turbine]] characteristics, and more. All of these factors also change depending on location of the site. Wind speed must also be in a certain range (depending on the turbine), above 3.5 [[meters per second|m/s]] in order to generate electricity, and below 25 m/s to avoid damage to the turbine.<ref>DASH, ''Meteorologically Defined Limits to Reduction in the Variability of Outputs from a Coupled Wind Farm System in the Central US'' [Online], Available: http://dash.harvard.edu/bitstream/handle/1/10981611/Meteorologically%20defined%20limits%20to%20reduction%20in%20the%20variability%20of%20outputs%20from%20a%20coupled%20wind%20farm%20system%20in%20the%20Central%20US_1.pdf?sequence=6</ref> When taking ''multiple'' wind farm's intermittency into consideration, it would make sense that the reliability would somewhat increase, but this actually doesn't appear to be the case.<ref>David JC McKay, ''Sustainable energy - without the hot air'' [Online], Available: http://www.inference.phy.cam.ac.uk/withouthotair/c26/page_187.shtml</ref>

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