A study on the required performance of a 2G HTS wire for HTS wind power generators

Sung, Hae-Jin; Park, Minwon; Go, Byeong-Soo; Yu, In-Keun

doi:10.1088/0953-2048/29/5/054001

Cited by 32 publications

(12 citation statements)

References 19 publications

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“…The costs are compared to the exemplary HTS projects, in which high power components were realized. Two reference values are available in the literature: a 7.5 MW HTS motor for a boat costs 46.67 EUR/kW [70] using a currency exchange rate from US Dollar (USD) to Euro (EUR) of 0.87 and a 12 MW HTS wind energy generator and its cryocooling system cost 210.25 EUR/kW [71]. Here, a higher price than the average value of these two references is taken into account due to higher certification costs in the aviation industry.…”

Section: Pmadmentioning

confidence: 99%

Conceptual Design of Operation Strategies for Hybrid Electric Aircraft

et al. 2018

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Ambitious targets to reduce emissions caused by aviation in the light of an expected ongoing rise of the air transport demand in the future drive the research of propulsion systems with lower CO 2 emissions. Regional hybrid electric aircraft (HEA) powered by conventional gas turbines and battery powered electric motors are investigated to test hybrid propulsion operation strategies. Especially the role of the battery within environmentally friendly concepts with significantly reduced carbon footprint is analyzed. Thus, a new simulation approach for HEA is introduced. The main findings underline the importance of choosing the right power-to-energy-ratio of a battery according to the flight mission. The gravimetric energy and power density of the electric storages determine the technologically feasibility of hybrid concepts. Cost competitive HEA configurations are found, but do not promise the targeted CO 2 emission savings, when the well-to-wheel system is regarded with its actual costs. Sensitivity studies are used to determine external levers that favor the profitability of HEA.

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Section: Pmadmentioning

confidence: 99%

Conceptual Design of Operation Strategies for Hybrid Electric Aircraft

et al. 2018

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“…al. [32] showcases an HTS field winding for a wind power generator that has a TTW of 137.3832 Nm/kg for the active weight. For the present paper, the TTW for the 3-phase machine is 137.8322 Nm/kg (i.e., only active mass, which verifies the design's effectiveness.…”

Section: E Efficiency and Torque Densitymentioning

confidence: 99%

Comparison of AC-Superconducting Multi-Phase Symmetric-Winding Topologies for Wind Power Generators with Passive PM Rotors

Tome¹,

Nilssen²,

Nøland³

2021

Preprint

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In this paper, an AC superconducting multi-phase symmetric-winding machine is designed for a wind power generator to improve its performance and reduce losses, where four handpicked topological designs were explored and compared. In particular, it is found that using high-phase order of unique phasors further improves the performance. The iron losses are reduced, and the rippling behaviour is reduced due to the smoother airgap magnetic flux density. Furthermore, a higher LCM is achieved due to a better slot-pole combination for fractional slot concentrated windings without having space sub-harmonics. Nonetheless, it is shown that creating a smooth air gap magnetic flux density does not improve the AC hysteretic superconducting losses; thus, further analysis with another approach must be done. Moreover, it is found that the Meisner effect is present in the machine and is inversely proportional to the AC hysteretic superconducting losses. Finally, it shows that a 13-phase AC-superconducting machine can achieve a theoretical limit approaching 101.7017 Nm/kg for the torque-to-weight (TTW) ratio, outperforming a classic winding layouts.

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“…REBa 2 Cu 3 O 7–δ or REBCO (rare earth element (RE)) is a group of type II ceramic high-temperature superconductors. REBCO superconductors are used, for example, in thin layers and films [ 28 , 29 ], second generation superconducting wires [ 30 , 31 , 32 ], or as the bi-functional catalyst for hydrogen evolution and oxygen reduction [ 33 ]. REBCO bulk ceramic is used in magnetic levitation objects for many applications [ 34 , 35 ], e.g., in precise positioners [ 36 ] or superconducting magnetic bearings [ 37 ].…”

Section: Introductionmentioning

confidence: 99%

Nanosized Pinning Centers in the Rare Earth-Barium-Copper-Oxide Thin-Film Superconductors

et al. 2020

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Since the discovery of high-temperature superconductivity, significant progress in the fabrication of REBCO-based (Rare Earth Barium Copper mixed Oxides) thin-films superconductors has been achieved. In our review, we described the approaches and possibilities of the improvement of superconducting properties by the introduction of nanosized pinning centers. We focused on the synthesis and viability of the material for artificial pinning centers and methods used for the introduction of the pinning centers into superconducting REBCO-based thin-films. This article summarizes available materials and procedures regardless of the financial cost of the individual method. According to available literature, the most significant superconducting REBCO tapes can be obtained when a combination of 1D and 0D nanoparticles are used for nanoscale pinning.

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A study on the required performance of a 2G HTS wire for HTS wind power generators

Cited by 32 publications

References 19 publications

Conceptual Design of Operation Strategies for Hybrid Electric Aircraft

Conceptual Design of Operation Strategies for Hybrid Electric Aircraft

Comparison of AC-Superconducting Multi-Phase Symmetric-Winding Topologies for Wind Power Generators with Passive PM Rotors

Nanosized Pinning Centers in the Rare Earth-Barium-Copper-Oxide Thin-Film Superconductors

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