Superconducting magnetic energy storage: Difference between revisions
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<onlyinclude>'''Superconducting magnetic energy storage''' ('''SMES''') is the only [[energy storage]] technology that stores | <onlyinclude>'''Superconducting magnetic energy storage''' ('''SMES''') is the only [[energy storage]] technology that stores [[electric current]]. This flowing current generates a [[magnetic field]], which is the means of [[energy storage]]. The current continues to loop continuously until it is needed and discharged.</onlyinclude> The [[superconducting]] coil must be super cooled to a [[temperature]] below the material's [[superconducting critical temperature]] that is in the range of 4.5 – 80[[Kelvin|K]] (-269 to -193[[Celsius|°C]]).<ref Name = Book1>Bradbury, K. (2010). Energy Storage Technology Review. Duke University. Retrieved October 4, 2013, from http://people.duke.edu/~kjb17/tutorials/Energy_Storage_Technologies.pdf</ref> The [[direct current]] that flows through the superconducting material experiences very little [[resistance]] so the only significant losses are associated with keeping the coils cool. | ||
The storage capacity of SMES is the product of the self inductance of the coil and the square of the [[current]] flowing through it: | The storage capacity of SMES is the product of the [[self inductance]] of the coil and the square of the [[current]] flowing through it: | ||
< | <math>E = \frac{1}{2} L I^2</math> | ||
*E is the [[energy]] stored in the coil (in [[Joule]]s) | *E is the [[energy]] stored in the coil (in [[Joule]]s) | ||
*L is the inductance of the coil (in [[Henry]]s) | *L is the [[inductance]] of the coil (in [[Henry]]s) | ||
*I is the current flowing through the coil (in [[Ampere]]s) | *I is the current flowing through the coil (in [[Ampere]]s) | ||
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== Applications of SMES == | == Applications of SMES == | ||
SMES is a specific technology with applications that can be applied to [[electrical transmission|transmission networks]] on the [[electrical grid]]. They have been commercially installed for several large industrial users.<ref name = Book2>Alberta Innovates. (Accessed September 1, 2015). ''Energy Storage: Making Intermittent Power Dispatchable'' [Online], Available: http://www.albertatechfutures.ca/Portals/0/documents/Energy%20Storage/Energy%20Storage%20-%20Making%20Intermittent%20Power%20Dispatchable%20-%20Final%20Report.pdf</ref> Although SMES systems are very expensive, they are extremely efficient, have almost instantaneous charge and discharge, are easily scale-able, and have little [[environmental impact]].<ref Name = Book1/> | SMES is a specific technology with applications that can be applied to [[electrical transmission|transmission networks]] on the [[electrical grid]]. They have been commercially installed for several large industrial users.<ref name = Book2>Alberta Innovates. (Accessed September 1, 2015). ''Energy Storage: Making Intermittent Power Dispatchable'' [Online], Available: http://www.albertatechfutures.ca/Portals/0/documents/Energy%20Storage/Energy%20Storage%20-%20Making%20Intermittent%20Power%20Dispatchable%20-%20Final%20Report.pdf</ref> Although SMES systems are very expensive, they are extremely efficient, have almost instantaneous charge and discharge, are easily scale-able, and have little [[environmental impact]].<ref Name = Book1/> | ||
== For Further Reading == | |||
For further information please see the related pages below: | |||
*[[Energy storage]] | |||
*[[Dispatchable source of electricity]] | |||
*[[Magnetic field]] | |||
*[[Electrical grid]] | |||
* Or explore a [[Special:Random| random page!]] | |||
==References== | ==References== | ||
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[[Category: Energy storage]] | [[Category: Energy storage]] | ||
[[Category:Uploaded]] | |||
Latest revision as of 18:17, 11 May 2018
Superconducting magnetic energy storage (SMES) is the only energy storage technology that stores electric current. This flowing current generates a magnetic field, which is the means of energy storage. The current continues to loop continuously until it is needed and discharged. The superconducting coil must be super cooled to a temperature below the material's superconducting critical temperature that is in the range of 4.5 – 80K (-269 to -193°C).[1] The direct current that flows through the superconducting material experiences very little resistance so the only significant losses are associated with keeping the coils cool.
The storage capacity of SMES is the product of the self inductance of the coil and the square of the current flowing through it:
- E is the energy stored in the coil (in Joules)
- L is the inductance of the coil (in Henrys)
- I is the current flowing through the coil (in Amperes)
The maximum current that can flow through the superconductor is dependent on the temperature, making the cooling system very important to the energy storage capacity. The cooling systems usually use liquid nitrogen or helium to keep the materials in a superconductor state.[1]
Applications of SMES
SMES is a specific technology with applications that can be applied to transmission networks on the electrical grid. They have been commercially installed for several large industrial users.[2] Although SMES systems are very expensive, they are extremely efficient, have almost instantaneous charge and discharge, are easily scale-able, and have little environmental impact.[1]
For Further Reading
For further information please see the related pages below:
- Energy storage
- Dispatchable source of electricity
- Magnetic field
- Electrical grid
- Or explore a random page!
References
- ↑ 1.0 1.1 1.2 Bradbury, K. (2010). Energy Storage Technology Review. Duke University. Retrieved October 4, 2013, from http://people.duke.edu/~kjb17/tutorials/Energy_Storage_Technologies.pdf
- ↑ Alberta Innovates. (Accessed September 1, 2015). Energy Storage: Making Intermittent Power Dispatchable [Online], Available: http://www.albertatechfutures.ca/Portals/0/documents/Energy%20Storage/Energy%20Storage%20-%20Making%20Intermittent%20Power%20Dispatchable%20-%20Final%20Report.pdf