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PRESLHY Experiment series E3.1 (Cryogenic Hydrogen Blow-down/Discharge) results – part A "high pressure"

Jordan, Thomas

Abstract (englisch):
In the frame of the PRESLHY project more than 200 hydrogen blow-down experiments were made with the DisCha-facility at KIT and about half of the experiments were made at cryogenic temperatures (approx. 80 K). During the experimental campaign the facility was continuously improved and extended, since several problems with the facility and instrumentation were encountered. However, the tests showed very good reproducibility. Although the actual exploitation of the data is left for the further modelling work in the work packages WP3 and WP4, some interesting observations are: not a single test showed a spontaneous ignition, although the cold jets generated relative strong electrostatic fields. This static electricity seems to be generated by ice crystal which form on the release nozzle before the tests. The cold tests with large diameter and high pressure show strong temperature decay in the reservoir close to the boiling point of hydrogen and quite a huge fraction of “particles” entrained in the released jet were recorded. It is assumed that this is ice from ambient humidity and frozen on the nozzle before the actual test. However, there might be condensed hydrogen involved, as the acceleration of the gas through the nozzle might bring down the temperature below the boiling point. ... mehr

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Zugehörige Institution(en) am KIT Institut für Kern- und Energietechnik (IKET)
Publikationstyp Forschungsdaten
Publikationsjahr 2019
Erstellungsdatum 18.02.2019 - 24.06.2019
Identifikator DOI (KIT): 10.5445/IR/1000096833
KITopen-ID: 1000096833
HGF-Programm 37.02.03 (POF III, LK 01) System Solutions with Hydrogen
Lizenz Creative Commons Namensnennung 4.0 International
Projektinformation PRESLHY (EU, H2020, 779613)
Externe Relationen Supplement
Schlagwörter Hydrogen safety, cryogenic, release, liquid hydrogen, blow-down, discharge

Result dataset files in Excel format of the sub-set of experiments with most mature measurement set-up. Data for all initial pressure levels, but same temperature (tt=80K/300K) and same nozzle diameter (mm=05/1/2/4mm) packed in zip file, named

Art der Forschungsdaten Dataset
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