Low Friction Cryostat for HTS Power Cable of Dutch Project

Publication: Research - peer-reviewConference article – Annual report year: 2012

  • Author: Chevtchenko, Oleg, Netherlands

    Technical University of Delft, Netherlands

  • Author: Zuijderduin, Roy, Netherlands

    Technical University of Delft, Netherlands

  • Author: Smit, Johan, Netherlands

    Technical University of Delft, Netherlands

  • Author: Willén, Dag, Denmark

    NKT Cables Group, Denmark

  • Author: Lentge, Heidi

    nkt cables group, Priorparken 560, 2605 Brondby, Denmark

  • Author: Thidemann, Carsten

    nkt cables group, Priorparken 560, 2605 Brondby, Denmark

  • Author: Traeholt, Chresten

    Electric Components, Department of Electrical Engineering, Technical University of Denmark, Denmark

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Particulars of 6km long HTS AC power cable for Amsterdam project are: a cable has to fit in an annulus of 160mm, with only two cooling stations at the cable ends [1]. Application of existing solutions for HTS cables would result in excessively high coolant pressure drop in the cable, possibly affecting public acceptance of the project. In order to solve this problem, a model cryostat was developed consisting of alternating rigid and flexible sections and hydraulic tests were conducted using sub-cooled liquid nitrogen. In the 47 m-long cryostat, containing a full-size HTS cable model, measured pressure drop amounts 11 mbar at the mass flow rate of 0.3kg/s and temperature 65K. For a 6 km-long HTS cable this gives a pressure drop below 2bar, which is acceptable. In order to achieve this result, the cryostat was manufactured from alternating straight rigid sections and corrugated flexible sections. A flexible dummy HTS cable was inserted into this cryostat and sub-cooled liquid nitrogen was circulated in the annulus between the dummy cable surface and the inner cryostat surface. In the paper details are presented of the cryostat, of the measurement setup, of the experiment and of the results.
Original languageEnglish
JournalPhysics Procedia
Publication date2012
Volume36
Pages1309 – 1312
ISSN1875-3892
DOIs
StatePublished

Conference

ConferenceSuperconductivity Centennial Conference (SCC-2011)
CountryNetherlands
CityThe Hague
Period18/09/1123/09/11
CitationsWeb of Science® Times Cited: 0

Keywords

  • Long HTS AC power cable, Dutch project, Model cryostat, Alternating rigid and flexible sections, Hydraulic measurements, Low friction, Reynolds number, Friction factor
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