I D
× COMMENTARYCOVER STORYIN THE NEWSNEWSFRONTSCHEMENTATOR + Show More
Chemical Engineering MagazineChementator Briefs
PDH catalyst Last month, Clariant's Catalyst business (Munich, Germany; www.clariant.com)…
BUSINESS NEWSTECHNICAL & PRACTICALFEATURE REPORTFACTS AT YOUR FINGERTIPSTECHNOLOGY PROFILESOLIDS PROCESSINGENGINEERING PRACTICEEQUIPMENT & SERVICESFOCUS
Focus on Pumps
Self-priming, liquid-ring pumps enable hygienic operation The CFS AS/ASH Series…
NEW PRODUCTS + Show More

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…
Chementator Briefs
PDH catalyst Last month, Clariant's Catalyst business (Munich, Germany; www.clariant.com) launched its latest propane dehydrogenation (PDH) catalyst, Catofin 311, which…

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
Quadruple Sensor Lifetime with a Retractable Housing
Minimizing Explosion Risk Where Other Solutions Cannot
Minimizing Corrosion with Fast, Robust Gas Analysis
Lower Measurement Point Costs with Automatic pH Sensor Cleaning
Reduce the Risk of Corrosion in Fertilizer Production

View More

Live chat by BoldChat