Publication

Considerations on the energy efficiency of a supercapacitive tank

Alfred Rufer
2002
Conference Papers

Abstract

Supercapacitors are electrochemical double layer capacitors, dedicated for the energ storage. Even if the energy density is still lower than that one of batteries, the supercapacitors are defined with a higher power density. The main advantage of that property is the time for charging and discharging the energy that can be strongly reduced. The limitation in the reduction of that time id defined by the series resistor of the supercapacitors , wich defines the energy efficiency of the component. This has to be taken into account for the sizing of a supercapacitor tank, to identify the en energy efficiency that tank and avoid any over-sizing of the storage system. This paper presents a method for the calculation of the energy efficiency of a supercapacitive bank, together with design criterion to size a supercapacitor tank into account the energy efficiency.

Official source

https://infoscience.epfl.ch/entities/publication/29a68de7-d342-41f4-905d-b6d923b29656

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Alfred Rufer
2002
Conference Papers

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/29a68de7-d342-41f4-905d-b6d923b29656

About this result

Related concepts (32)

Supercapacitor

A supercapacitor (SC), also called an ultracapacitor, is a high-capacity capacitor, with a capacitance value much higher than other capacitors but with lower voltage limits. It bridges the gap between electrolytic capacitors and rechargeable batteries. It typically stores 10 to 100 times more energy per unit volume or mass than electrolytic capacitors, can accept and deliver charge much faster than batteries, and tolerates many more charge and discharge cycles than rechargeable batteries.

Energy storage

Energy storage is the capture of energy produced at one time for use at a later time to reduce imbalances between energy demand and energy production. A device that stores energy is generally called an accumulator or battery. Energy comes in multiple forms including radiation, chemical, gravitational potential, electrical potential, electricity, elevated temperature, latent heat and kinetic. Energy storage involves converting energy from forms that are difficult to store to more conveniently or economically storable forms.

Energy density

In physics, energy density is the amount of energy stored in a given system or region of space per unit volume. It is sometimes confused with energy per unit mass which is properly called specific energy or . Often only the useful or extractable energy is measured, which is to say that inaccessible energy (such as rest mass energy) is ignored. In cosmological and other general relativistic contexts, however, the energy densities considered are those that correspond to the elements of the stress-energy tensor and therefore do include mass energy as well as energy densities associated with pressure.

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Considerations on the energy efficiency of a supercapacitive tank

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