Boiling heat transfer and CHF for subcooled water flowing in a narrow channel due to power transients. Issue 1 (2nd January 2020)

• Record Type: Journal Article
• Authors: Shibahara, M.; Liu, Q.S.; Hata, K.; Fukuda, K.
• Is Part Of: Experimental heat transfer. Volume 33:Issue 1(2020)
• Page Start: 64
• Page End: 80
• Publication Date: 2020-01-02
• Subjects: Flow boiling -- subcooled water -- CHF -- power transient; Heat -- Transmission -- Measurement -- Periodicals; 621.4022
• DOI: 10.1080/08916152.2019.1570984
• Languages: English
• ISSNs: 0891-6152

Abstract

ABSTRACT: The transient critical heat flux (CHF) of subcooled water flowing in a narrow channel was measured. A small tube with an inner diameter of 1.0 mm was heated by a direct current. The effects of the subcooling, pressure, flow velocity, and e-folding times of the heat generation rate on the transient CHF were investigated. The experimental result showed that an initial temperature overshoot appeared as the e-folding time of the heat generation rate decreased. The CHF increased with a shorter e-folding time of the heat generation rate. Finally, an empirical correlation for the transient CHF was obtained.