Application potential of a new kind of superconducting energy storage/convertor

Li, Wenxin; Yang, Tianhui; Li, Gengyao; Xin, Ying

doi:10.1016/j.est.2022.104590

Cited by 7 publications

(8 citation statements)

References 22 publications

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“…To verify the effectiveness, a set of experiments on a prototype with this configuration is also carried out. It proved that the energy capacity of this kind of superconducting energy storage device with the magnet-optimized configuration is able to be increased by four times over that with the original configuration using the same superconducting coil, and the efficiency will not decrease [7]. In addition, we have explored the feasibility of using a coil group with multi closed superconducting coils for increasing energy capacity.…”

Section: New Superconducting Energy Storage Technologymentioning

confidence: 98%

“…Obviously, this feature makes the new energy storage more efficient in mechanical energy conversion than any other energy storage devices. From the previous studies [6,7], the cycle efficiency of energy conversion from mechanical to mechanical is higher than 80%, and it has been proved that the cycle efficiency can increase with the increase in energy storage capacity. From the experimental results of a prototype with the magnet-optimized configuration, the cycle efficiency is up to 88% [7].…”

Section: Energy Conversion Efficiencymentioning

confidence: 99%

“…From the previous studies [6,7], the cycle efficiency of energy conversion from mechanical to mechanical is higher than 80%, and it has been proved that the cycle efficiency can increase with the increase in energy storage capacity. From the experimental results of a prototype with the magnet-optimized configuration, the cycle efficiency is up to 88% [7]. It is expected that as the energy storage device is scaled up, the joule heating on joint resistance of the superconducting coil will further decrease as a percentage of the storage energy capacity.…”

Section: Energy Conversion Efficiencymentioning

confidence: 99%

“…With the development of theory and mathematic description of the new energy storage, the methods for optimizing the performance, including energy capacity and power input/output quality, are investigated [7,[46][47][48][49][50]. In terms of energy capacity, a new permanent magnet group composed of two/three separated magnets is proposed to replace the single permanent magnet.…”

Section: New Superconducting Energy Storage Technologymentioning

confidence: 99%

“…Superconductors have been employed to advance a number of transportation technologies, such as SCMAGLEV for high speed rail transportation [1,2], light weight and high power density motors for ship and aircraft propulsion [3][4][5]. In last few years, our group proposed and investigated a new kind of superconducting energy storage/convertor [6,7]. Based on the characteristic of this kind of device, one of its potential applications is for regenerative braking in urban rail transit.…”

Section: Introductionmentioning

confidence: 99%

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Exploration on the application of a new type of superconducting energy storage for regenerative braking in urban rail transit

Li,

Yang,

et al. 2023

Supercond. Sci. Technol.

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Regenerative braking technology has become increasingly attractive due to its ability to recover and reuse the energy that would otherwise be lost. In recent years, a new superconducting energy storage technology is proposed and it has been proved experimentally and analytically that the technology has promising application potential in urban rail transit for regenerative braking. However, a comprehensive assessment of the new technology has not been conducted up to date. In this paper, the currently available energy storage technologies for regenerative braking, such as batteries, supercapacitors, flywheels, and SMES are introduced along with the new superconducting energy storage technology. Comparative studies between the existing technologies and the new one are conducted in terms of energy density, energy conversion efficiency, energy storage duration, capital cost and environmental impact. It is concluded that a regenerative braking system with the new superconducting energy storage has very high cycle efficiency and is superior to the existing energy storage systems. It has the potential to revolutionize the regenerative braking technology and to develop more efficient and sustainable urban rail transportation systems.

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Section: New Superconducting Energy Storage Technologymentioning

confidence: 98%

Section: Energy Conversion Efficiencymentioning

confidence: 99%

Section: Energy Conversion Efficiencymentioning

confidence: 99%

Section: New Superconducting Energy Storage Technologymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Exploration on the application of a new type of superconducting energy storage for regenerative braking in urban rail transit

Li,

Yang,

et al. 2023

Supercond. Sci. Technol.

Self Cite

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New configuration to improve the power input/output quality of a superconducting energy storage/convertor

Yang

Xin

2023

Journal of Energy Storage

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Current control and tuning in a closed HTS coil

Xin

et al. 2022

AIP Advances

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Up to today, a coil made of high temperature superconductor (HTS) usually needs a soldered joint to form a closed circuit. It is very difficult to have the joint fully superconducting. The Ohmic joint will cause Joule loss when the coil carries a quasi-persistent current. As a result, the electromagnetic energy stored in an HTS coil declines with time. We propose an approach to reduce the Joule loss of an HTS coil during the energy storing stage. The principle of the approach is to tune the current of the HTS coil smaller by introducing an iron core into the coil to increase the inductance of the coil. With this approach, the Joule loss on the HTS coil will be significantly reduced and the initially stored energy in the coil will be kept with little attenuation in a relatively long energy storing period. When a larger current is required for some functions, the current can be almost returned to the initial charged value by removing the iron core from the HTS coil. In this paper, we report our results in analytical deduction and experimental verification of this principle. Besides, the current value can be tuned to any value in a certain range by controlling the position of the iron core inside the HTS coil. This feature may be useful for some applications in which the current or magnetic field needs to be adjusted.

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Application potential of a new kind of superconducting energy storage/convertor

Cited by 7 publications

References 22 publications

Exploration on the application of a new type of superconducting energy storage for regenerative braking in urban rail transit

Exploration on the application of a new type of superconducting energy storage for regenerative braking in urban rail transit

New configuration to improve the power input/output quality of a superconducting energy storage/convertor

Current control and tuning in a closed HTS coil

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