I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical EngineeringChemenator Briefs
Cellulosic ethanol Clariant AG (Muttenz, Switzerland; www.clariant.com) has produced the…
TECHNICAL & PRACTICALTOWER DOCTORFEATURE REPORTFACTS AT YOUR FINGERTIPSSOLIDS PROCESSINGEQUIPMENT & SERVICESAPPLIED TECHNOLOGIESFOCUS
Focus on Pumps
Track pump operation with this monitoring system This company has…
SHOW PREVIEWS

Comment

New cryogenic technology for cooling superconducting cables

By Gerald Ondrey |

Industrial gases specialist Messer Group GmbH (Bad Soden, Germany; www.messergroup.com) has developed a new cryogenic technology that makes it possible to use liquid nitrogen (LN2) to cool high-temperature superconducting (HTS) cables down to –209°C, which is significantly lower than that normally achieved by LN2 (–196°C). The new process was developed for the AmpaCity project of RWE Deutschland GmbH (Essen, Germany; www.rwe.com), in which a 1-km long, 10-kV superconductor cable replaced the conventional 110-kV lines between two substations in the city center of Essen, Germany. The HTS cable was developed by project partner, Nexans Deutschland GmbH (Hannover, Germany; www.nexans.com), and was commissioned in April 2014. In Messer’s process (diagram), N2 is vaporized at about 150 mbar, which lowers the boiling point to –209°C, thus achieving the specification for the cables (N2 freezes at –210°C, so lower temperatures are not possible). The LN2 is pumped through the HTS cable in order to conduct away any heat that penetrates through the thermal insulation, explains Friedhelm Herzog, senior manager for industrial application at Messer. The N2 heats up from –206°C when it enters the cable, to –201°C at the exit. The…
Related Content
Flow Measurement in Bitter Cold
The usage of Coriolis flowmeters for measuring mass flowrates has become widespread in the chemical process industries, and the range…

Chemical Engineering publishes FREE eletters that bring our original content to our readers in an easily accessible email format about once a week.
Subscribe Now
GMP In The Cosmetic Industry
Solve turbomachinery problems: Miba Tilting Pad Bearings
Six Steps to Designing a Storage Vessel That Really Works
SICK Solutions for Cleaner Industries - Powerful Transitions
Gain a Digital Line of Sight Across the Whole Lifecycle of the Plant with a Digital Twin

View More