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Thermal performances of a meter-scale cryogenic pulsating heat pipe

Bruce, Romain; Barba, Maria; Baudouy, Bertrand

Abstract:
The combination of dry superconducting magnet using cryocooler as a cold source is becoming a standard. As the magnetic field highly decreases the cryocooler performances, the distance between the hot and cold spot is preferable to be higher than 1 m to maintain these performances. Thanks to their operation simplicity, compacity, lightness, and of course thermal performances, Pulsating Heat Pipes (PHP) are good candidates, as long two-phase thermal link, for these kind of systems. PHP can also work without gravity, in multiple orientations, with a small amount of liquid/gas and at a temperature around the saturation state of the working fluid inside. These devices are studied at different temperature to mostly cool down small electronic devices. At cryogenic temperature, PHPs have been studied in vertical and horizontal position filled with nitrogen, helium and neon mixtures. The longest one ever tested at these temperature is about 30 cm long. In this paper, we present the thermal performances of a 1 m long horizontal PHP made of 36 stainless steel parallel tubes. The tube internal diameter is 1.5 mm, close to the critical diameter (~1.7 mm) to maintain capillarity forces necessary to the PHP operation. ... mehr

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Volltext §
DOI: 10.5445/IR/1000075574
Coverbild
Zugehörige Institution(en) am KIT Institut für Technische Physik (ITEP)
Publikationstyp Vortrag
Jahr 2017
Sprache Englisch
Identifikator urn:nbn:de:swb:90-755741
KITopen-ID: 1000075574
HGF-Programm 37.06.02 (POF III, LK 01)
Veranstaltung 2nd International Workshop on Cooling Systems for HTS Applications (IWC-HTS), Karlsruhe, Germany, 13th - 15th September 2017
Bemerkung zur Veröffentlichung Author affiliation: Commissariat à l’énergie atomique et aux énergies alternatives, France
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