Pressure-drop reduction and heat-transfer deterioration of slush nitrogen in square pipe flow

Katsuhide Ohira, Kei Nakagomi, Koichi Takahashi, Itsuo Aoki

Research output: Contribution to journalConference article

4 Citations (Scopus)

Abstract

Pressure drop and heat transfer tests were carried out using slush nitrogen flowing in a horizontal square pipe at flow velocity between 1.0 and 4.9 m/s, with a mass solid fraction between 6 and 26 wt.%, and with heat fluxes of 0, 10 and 20 kW/m2. Pressure drop reduction became apparent at flow velocity of 2.5 m/s and over, with the maximum amount of reduction being 12% in comparison with liquid nitrogen, regardless of heating, while heat transfer deterioration became apparent at flow velocity of 1.0 m/s and over, with the maximum amount of deterioration being 16 and 21% at 10 and 20 kW/m2, respectively.

Original languageEnglish
Pages (from-to)681-686
Number of pages6
JournalPhysics Procedia
Volume67
DOIs
Publication statusPublished - 2015 Jan 1
Event25th International Cryogenic Engineering Conference and International Cryogenic Materials Conference, ICEC/ICMC 2014 - Enschede, Netherlands
Duration: 2014 Jul 72014 Jul 11

Keywords

  • heat transfer deterioration
  • hydrogen energy system
  • pressure drop reduction
  • slush hydrogen
  • slush nitrogen

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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