Low Friction Cryostat for HTS Power Cable of Dutch Project

Low Friction Cryostat for HTS Power Cable of Dutch Project

Chevtchenko, O.
Zuijderduin, R.
Smit, J.
Willen, D.
Lentge, H.
Thidemann, C.
Traeholt, C.

Electrical Engineering, Mathematics and Computer Science

Electrical Sustainable Energy

2012-12-31

Particulars of 6 km long HTS AC power cable for Amsterdam project are: a cable has to fit in an annulus of 160 mm, 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 0.3 kg/s and temperature 65 K. For a 6 km-long HTS cable this gives a pressure drop below 2 bar, 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.

long HTS AC power cable
Dutch project
model cryostat
alternating rigid and flexible sections
hydraulic measurements
low friction
Reynolds number
friction factor

http://resolver.tudelft.nl/uuid:9c1615f4-dfc2-4729-9b6b-cdded210e01d

doi: 10.1016/j.phpro.2012.06.296

Elsevier

1875-3892

Physics Procedia, 36, 2012

Institutional Repository

journal article

© 2012 The Author(s)
Elsevier