Heat transfer characteristics of slush nitrogen in turbulent pipe flows

K. Ohira, J. Ishimoto, M. Nozawa, T. Kura, N. Takahashi

Research output: Chapter in Book/Report/Conference proceedingConference contribution

3 Citations (Scopus)

Abstract

Slush fluids, such as slush hydrogen and slush nitrogen, are two-phase (solid-liquid) single-component cryogenic fluids containing solid particles in a liquid, and consequently their density and refrigerant capacity are greater than for liquid state fluid alone. This paper reports on the experimental results of the forced convection heat transfer characteristics of slush nitrogen flowing in a pipe. Heat was supplied to slush nitrogen by a heater wound around the copper pipe wall. The local heat transfer coefficient was measured in conjunction with changes in the velocity and the solid fraction. The differences in heat transfer characteristics between two-phase slush and single phase liquid nitrogen were obtained, and the decrease in heat transfer to slush nitrogen caused by the previously observed pressure drop reduction was confirmed by this study. Furthermore, for the purpose of establishing the thermal design criteria for slush nitrogen in the case of pressure drop reduction, the heat transfer correlation between the experimental results and the Sieder-Tate Equation was obtained.

Original languageEnglish
Title of host publicationAdvances in Cryogenic Engineering - Transactions of the Cryogenic Engineering Conference - CEC
Pages1141-1148
Number of pages8
DOIs
Publication statusPublished - 2008 Apr 28
EventTransactions of the Cryogenic Engineering Conference, CEC 2007 - hattanooga, TN, United States
Duration: 2007 Jul 162007 Jul 20

Publication series

NameAIP Conference Proceedings
Volume985
ISSN (Print)0094-243X
ISSN (Electronic)1551-7616

Other

OtherTransactions of the Cryogenic Engineering Conference, CEC 2007
CountryUnited States
Cityhattanooga, TN
Period07/7/1607/7/20

Keywords

  • Heat transfer
  • Slush nitrogen
  • Turbulent pipe flow
  • Two-phase flow

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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