Construction and 1st Experiment of the 500-meter and 1000-meter DC Superconducting Power Cable in Ishikari

Yamaguchi, S.; Ivanov, Yury; Watanabe, Hirofumi; Chikumoto, N.; Koshiduka, H.; Hayashi, Kazuhiko; Sawamura, Toru

doi:10.1016/j.phpro.2016.04.046

Cited by 14 publications

(4 citation statements)

References 4 publications

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“…In equation (8), h is the convective heat transfer coefficient, d is the effective diameter of the channel and T wall,∥ is the wall temperature along the cable. The minus sign at the right-hand side (RHS) holds for the return line rl in the corrugated annulus.…”

Section: Simplified 1d or 1d+ Modelsmentioning

confidence: 99%

“…This followed the successful demonstration of the stability and operation conditions of the two AC and DC cables in the real power grid on Jeju Island [7]. In the city of Ishikari on Hokkaido Island, Japan, two SC DC power transmission lines (one 500 m long and the second 1 km long, respectively) were successfully tested in 2015 and 2016 [8,9]. In St. Petersburg, Russia, a 2.5 km high-voltage DC SCTL is planned to enter operation into the city electric power system [2,10,11], and a full-scale transmission line has been recently tested, to confirm the design performance [12].…”

Section: Introductionmentioning

confidence: 99%

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Thermal-hydraulic models for the cooling of HTS power-transmission cables: status and needs

Savoldi¹,

Placido²,

Viarengo³

2022

Supercond. Sci. Technol.

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An overview of the main peculiarities of the models currently available in literature for the thermal-hydraulic analysis of the cooling of the HTS power transmission cables, mainly in nominal operating conditions, is performed. Several models address specific issues such as the temperature distribution along or across the cables, and their pressure drop, typically with a simplified approach. The verification and validation of the models has not been systematically addressed so far. From the analysis of the available literature, the lack of a general model, capable to address thermal-hydraulic transients for the cooling of the different possible cable designs, with capability to catch both the behaviour of the cable solid components and different cryogens, is highlighted. The main ingredients that such general thermal-hydraulic model should not miss are presented, also based on the know-how on, and comparison to, similar tools for LTS cables for nuclear fusion applications.

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Section: Simplified 1d or 1d+ Modelsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal-hydraulic models for the cooling of HTS power-transmission cables: status and needs

Savoldi¹,

Placido²,

Viarengo³

2022

Supercond. Sci. Technol.

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“…We have measured the heat leak with respect to the surface temperature of the cryogenic pipes developed for the project of the superconducting DC power transmission performed in Ishikari, Japan (Ishikari project) [1,2,3]. Two different cryogenic pipes were developed in this project, one of which is the object of this study [4].…”

Section: Introductionmentioning

confidence: 99%

Heat leak variation with the surface temperature of a cryogenic pipe of the superconducting power transmission

Watanabe

Iizuka²,

Kato³

et al. 2022

J. Phys.: Conf. Ser.

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The measurements of the heat leak variation with the surface temperature of a cryogenic pipe of the superconducting power transmission were performed in the range of 23.7 °C–36.4 °C. The cryogenic pipe which was an object of the present study was that used in the project of the superconducting DC power transmission conducted in Ishikari, Japan (Ishikari project). This cryogenic pipe has two inner pipes in one outer pipe, with a radiation shield used to conceal the inner pipe installing the cable from the outer pipe, which is at room temperature, to reduce heat leakage. A test pipe with the length of 12 m was used for the measurements. The liquid nitrogen was filled in the test pipe and the evaporated nitrogen gas rate was measured to obtain the heat leak. The heat leak to the inner pipe installing the cable was almost constant at around 0.04 W/m, whereas the heat leak to the other inner pipe used to return liquid nitrogen for circulation was around 1.3 W/m at surface temperatures ranging from 23.7 °C to 36.4 °C. The latter, with previous measurements, was well fitted by a function considering radiative heat transfer and conductive heat transfer. Portions of the radiative heat transfer and the conductive heat transfer were separated with this function. This information can be used to improve the cryogenic pipe in the future.

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“…There is no difficult technical obstacle in the application of LNG long-distance transportation. Moreover, several power transmission projects using HTS cables cooled by LN 2 have been demonstrated around the world [6][7][8][9][10]. Since the critical temperatures of BSCCO, TBCCO and HBCCO are 110 K, 125 K and 150 K respectively, which are near to or higher than the temperature of LNG, it is possible to integrate the HTS power cable and LNG transport pipeline, forming an HTS energy pipeline [11].…”

Section: Introductionmentioning

confidence: 99%

Design and testing of a 10 kV/1 kA superconducting energy pipeline prototype for electric power and liquid natural gas transportation

Qiu

Xiao

Zhang

et al. 2020

Supercond. Sci. Technol.

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High T c superconducting (HTS) DC cable is a promising solution for large-scale power transmission over long distance. However, the refrigeration system for HTS cable is indispensable but undesirable. Considering that LNG (liquid natural gas) is now one kind of clean energy that is used more and more widely, it is possible to integrate HTS cable and LNG transportation into a single pipeline, resulting in a new energy transportation system-a HTS energy pipeline. In this paper, the principle and structure of the energy pipeline are first discussed and then the basic physical properties of the HTS tapes and liquid insulation medium in the LNG temperature range are analyzed. On this basis, a 10 kV/1 kA energy pipeline is designed, fabricated and tested.

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Construction and 1st Experiment of the 500-meter and 1000-meter DC Superconducting Power Cable in Ishikari

Cited by 14 publications

References 4 publications

Thermal-hydraulic models for the cooling of HTS power-transmission cables: status and needs

Thermal-hydraulic models for the cooling of HTS power-transmission cables: status and needs

Heat leak variation with the surface temperature of a cryogenic pipe of the superconducting power transmission

Design and testing of a 10 kV/1 kA superconducting energy pipeline prototype for electric power and liquid natural gas transportation

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