Energy density vs power density - Revision history

Jmdonev at 22:15, 4 January 2019

2019-01-04T22:15:10Z

← Older revision		Revision as of 22:15, 4 January 2019
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	[[Category:Done 2018-07-20]]		[[Category:Done 2018-07-20]]
	<onlyinclude>'''Energy density''' is the amount of [[energy]] in a given [[~~volume~~]] and '''power density''' is the amount of [[power]] in a given ~~volume~~. The distinction between the two is similar to the difference between [[Energy vs power\|Energy and power]]. [[Battery\|Batteries]] have a higher energy density than [[capacitor]]s, but a capacitor has a higher power density than a [[battery]].</onlyinclude> This difference comes from batteries being able to store more energy, but capacitors can give off energy more quickly.		<onlyinclude>'''Energy density''' is the amount of [[energy]] in a given [[mass]] (or volume) and '''power density''' is the amount of [[power]] in a given mass. The distinction between the two is similar to the difference between [[Energy vs power\|Energy and power]]. [[Battery\|Batteries]] have a higher energy density than [[capacitor]]s, but a capacitor has a higher power density than a [[battery]].</onlyinclude> This difference comes from batteries being able to store more energy, but capacitors can give off energy more quickly.

	==Energy density==		==Energy density==
	:''[[Energy density\|full article]]''		:''[[Energy density\|full article]]''

	[[File:energy vs power density .png\|400px\|framed\|right\|Figure 1. This demonstrates the relationship between energy density and power density. For example, Fuel cells will have very high energy densities, with relatively low power densities.<ref>"File:Lithium Ion Capacitor Chart.png - Wikimedia Commons", Commons.wikimedia.org, 2018. [Online]. Available: https://commons.wikimedia.org/wiki/File:Lithium_Ion_Capacitor_Chart.png. [Accessed: 13- Jul- 2018].</ref>]]		If a system has a high energy density then it is able to store a lot of energy in a small amount of mass. A high energy density does not necessarily mean a high power density. An object with a high energy density, but low power density can perform work for a relatively long period of time.<ref>B. E. Layton, "A comparison of Energy Densities of Prevalent Energy Sources in Units of Joules Per Cubic Meter," ''Int. J. Green Energy'', vol. 5, no. 6, pp. 438-455, Dec. 2008.</ref> An example of this type of energy storage is a mobile phone. Its power will last most of the day, but to recharge the device, it must be connected to another power source for an hour or more.

	If a system has a high energy density then it is able to store a lot of energy in a small amount of ~~volume~~. A high energy density does not necessarily mean a high power density. An object with a high energy density, but low power density can perform work for a relatively long period of time.<ref>B. E. Layton, "A comparison of Energy Densities of Prevalent Energy Sources in Units of Joules Per Cubic Meter," ''Int. J. Green Energy'', vol. 5, no. 6, pp. 438-455, Dec. 2008.</ref> An example of this type of energy storage is a mobile phone. Its power will last most of the day, but to recharge the device, it must be connected to another power source for an hour or more. ~~<br /><br/>~~


			[[File:energy vs power density .png\|800px\|framed\|center\|Figure 1. This demonstrates the relationship between energy density and power density. For example, Fuel cells will have very high energy densities, with relatively low power densities.<ref>"File:Lithium Ion Capacitor Chart.png - Wikimedia Commons", Commons.wikimedia.org, 2018. [Online]. Available: https://commons.wikimedia.org/wiki/File:Lithium_Ion_Capacitor_Chart.png. [Accessed: 13- Jul- 2018].</ref>]]

	==Power density==		==Power density==
	:''[[Power density\|full article]]''		:''[[Power density\|full article]]''
	If a system has a high power density, than it can output large amounts of energy based on its ~~volume~~. For example, a tiny [[capacitor]] may have the same power output as a large battery. However, since the capacitor is so much smaller, it has a higher power density. Since they release their energy quickly, high power density systems can also recharge quickly. An example application of this type of energy storage is a camera flash. It has to be small enough to fit inside the camera (or cell phone) but have a high enough power output to light up the subject of your photo. this makes a system with a high power density ideal. <br />		If a system has a high power density, than it can output large amounts of energy based on its mass. For example, a tiny [[capacitor]] may have the same power output as a large battery. However, since the capacitor is so much smaller, it has a higher power density. Since they release their energy quickly, high power density systems can also recharge quickly. An example application of this type of energy storage is a camera flash. It has to be small enough to fit inside the camera (or cell phone) but have a high enough power output to light up the subject of your photo. this makes a system with a high power density ideal. <br />

	==An example==		==An example==

Jmdonev: 1 revision imported

2018-07-21T01:12:59Z

1 revision imported

← Older revision	Revision as of 01:12, 21 July 2018
(No difference)

Jmdonev at 19:34, 17 July 2018

2018-07-17T19:34:25Z

← Older revision		Revision as of 19:34, 17 July 2018
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	[[Category:Done ~~2015~~-02-15]]		[[Category:Done 2018-07-20]]
	~~:''This is closely related to [[power vs energy\|energy vs power.]]''~~		<onlyinclude>'''Energy density''' is the amount of [[energy]] in a given [[volume]] and '''power density''' is the amount of [[power]] in a given volume. The distinction between the two is similar to the difference between [[Energy vs power\|Energy and power]]. [[Battery\|Batteries]] have a higher energy density than [[capacitor]]s, but a capacitor has a higher power density than a [[battery]].</onlyinclude> This difference comes from batteries being able to store more energy, but capacitors can give off energy more quickly.

	<onlyinclude>'''Energy density''' and '''power density''' ~~are similar to~~ [[~~energy~~]] ~~and~~ [[power]]~~, except that their values relate to volume~~. [[~~Gasoline~~]] ~~has~~ a higher energy density than [[~~wood~~]], ~~and~~ a [[capacitor]] has a higher power density than a [[battery]]. </onlyinclude>

	==Energy density==		==Energy density==
	:''[[Energy density\|full article]]''		:''[[Energy density\|full article]]''
	If a system has a high energy density then it is able to store a lot of energy in a small amount of volume. A high energy density does not necessarily mean a high power density. An object with a high energy density, but low power density can perform work for a relatively long period of time.<ref>B. E. Layton, "A comparison of Energy Densities of Prevalent Energy Sources in Units of Joules Per Cubic Meter," ''Int. J. Green Energy'', vol. 5, no. 6, pp. 438-455, Dec. 2008.</ref> An example of this type of energy storage is a mobile phone. Its power will last most of the day, but to recharge the device, it must be connected to another power source for an hour or more. <br />
			[[File:energy vs power density .png\|400px\|framed\|right\|Figure 1. This demonstrates the relationship between energy density and power density. For example, Fuel cells will have very high energy densities, with relatively low power densities.<ref>"File:Lithium Ion Capacitor Chart.png - Wikimedia Commons", Commons.wikimedia.org, 2018. [Online]. Available: https://commons.wikimedia.org/wiki/File:Lithium_Ion_Capacitor_Chart.png. [Accessed: 13- Jul- 2018].</ref>]]

			If a system has a high energy density then it is able to store a lot of energy in a small amount of volume. A high energy density does not necessarily mean a high power density. An object with a high energy density, but low power density can perform work for a relatively long period of time.<ref>B. E. Layton, "A comparison of Energy Densities of Prevalent Energy Sources in Units of Joules Per Cubic Meter," ''Int. J. Green Energy'', vol. 5, no. 6, pp. 438-455, Dec. 2008.</ref> An example of this type of energy storage is a mobile phone. Its power will last most of the day, but to recharge the device, it must be connected to another power source for an hour or more. <br /><br/>



	==Power density==		==Power density==
	:''[[Power density\|full article]]''		:''[[Power density\|full article]]''
	If a system has a high power density, than it can output large amounts of energy based on its volume. For example, a tiny [[capacitor]] may have the same power output as a large battery. ~~Because~~ the capacitor is so much smaller, it has a higher power density. Since they release their energy quickly, high power density systems can also recharge quickly. An example application of this type of energy storage is a camera flash. It has to be small enough to fit inside the camera (or cell phone) but have a high enough power output to light up the subject of your photo. this makes a system with a high power density ideal. <br />		If a system has a high power density, than it can output large amounts of energy based on its volume. For example, a tiny [[capacitor]] may have the same power output as a large battery. However, since the capacitor is so much smaller, it has a higher power density. Since they release their energy quickly, high power density systems can also recharge quickly. An example application of this type of energy storage is a camera flash. It has to be small enough to fit inside the camera (or cell phone) but have a high enough power output to light up the subject of your photo. this makes a system with a high power density ideal. <br />

	==An example==		==An example==
	To better understand energy density, ~~let's imagine we're~~ out camping. Evening has come, and it's time for S'mores, so ~~we need~~ a fire. ~~What do you use to start your fire?~~ Naturally, ~~you use~~ kindling. It's high surface area-to-volume ratio means that it burns ~~quickly - a~~ high power density. ~~Thing is, once your~~ fire is going, ~~you don~~'t ~~want to use kindling~~ anymore, because it burns too fast. ~~You switch to~~ logs because they have have a high energy density. A single log ~~that you place in the fire~~ burns well for a long time.		To better understand energy density, consider people lighting a fire while out camping. Evening has come, and it's time for S'mores, so it is time to build a [[fire]]. Naturally, the fire is first lit with kindling. It's high surface area-to-volume ratio means that it burns quickly—a high power density. Once the fire is going, kindling isn't a good [[fuel]] choice anymore, because it burns too fast. Now the fire burns better with logs because they have have a high energy density. A single log burns well for a long time.

			==For Further Reading==
			*[[Energy density]]
			*[[Power density]]
			*[[Wood]]
			*[[Capacitor]]
			*[[Battery]]
			*Or explore a [[Special:Random\|random page]]

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

J.williams: 1 revision imported

2015-08-26T21:30:45Z

1 revision imported

← Older revision	Revision as of 21:30, 26 August 2015
(No difference)

J.williams at 22:46, 11 August 2015

2015-08-11T22:46:26Z

New page

[[Category:Done 2015-02-15]]
:''This is closely related to [[power vs energy|energy vs power.]]''

<onlyinclude>'''Energy density''' and '''power density''' are similar to [[energy]] and [[power]], except that their values relate to volume. [[Gasoline]] has a higher energy density than [[wood]], and a [[capacitor]] has a higher power density than a [[battery]]. </onlyinclude>

==Energy density==
:''[[Energy density|full article]]''
If a system has a high energy density then it is able to store a lot of energy in a small amount of volume. A high energy density does not necessarily mean a high power density. An object with a high energy density, but low power density can perform work for a relatively long period of time.<ref>B. E. Layton, "A comparison of Energy Densities of Prevalent Energy Sources in Units of Joules Per Cubic Meter," ''Int. J. Green Energy'', vol. 5, no. 6, pp. 438-455, Dec. 2008.</ref> An example of this type of energy storage is a mobile phone. Its power will last most of the day, but to recharge the device, it must be connected to another power source for an hour or more. <br />

==Power density==
:''[[Power density|full article]]''
If a system has a high power density, than it can output large amounts of energy based on its volume. For example, a tiny [[capacitor]] may have the same power output as a large battery. Because the capacitor is so much smaller, it has a higher power density. Since they release their energy quickly, high power density systems can also recharge quickly. An example application of this type of energy storage is a camera flash. It has to be small enough to fit inside the camera (or cell phone) but have a high enough power output to light up the subject of your photo. this makes a system with a high power density ideal. <br />

==An example==
To better understand energy density, let's imagine we're out camping. Evening has come, and it's time for S'mores, so we need a fire. What do you use to start your fire? Naturally, you use kindling. It's high surface area-to-volume ratio means that it burns quickly - a high power density. Thing is, once your fire is going, you don't want to use kindling anymore, because it burns too fast. You switch to logs because they have have a high energy density. A single log that you place in the fire burns well for a long time.

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