0
research-article

Saturated Pool Nucleate Boiling on Heat Transfer Surface with Deposited Sea Salts

[+] Author and Article Information
Shinichiro Uesawa

Japan Atomic Energy Agency
uesawa.shinichiro@jaea.go.jp

Yasuo Koizumi

Japan Atomic Energy Agency
koizumiy@shinshu-u.ac.jp

Mitsuhiko Shibata

Japan Atomic Energy Agency
shibata.mitsuhiko@jaea.go.jp

Hiroyuki Yoshida

Japan Atomic Energy Agency
yoshida.hiroyuki@jaea.go.jp

1Corresponding author.

ASME doi:10.1115/1.4036987 History: Received December 08, 2016; Revised May 15, 2017

Abstract

Seawater was injected into reactor cores in the accident at the Fukushima Daiichi Nuclear Power Station. Saturated pool nucleate boiling heat transfer experiments of NaCl solution, natural seawater and artificial seawater as well as distilled water were performed to examine the effect of salts on boiling heat transfer. The heat transfer surface was made of a printed coper circuit board. A boiling state was recorded with a high speed video camera. A surface temperature distribution was measured with an infrared camera. The concentration of the NaCl solution and the artificial sweater was varied in the range of 3.5 ~ 10 wt% in the experiments. Boiling curves were well predicted with the Rohsenow correlation although large coalescent bubble formation was suppressed in NaCl, natural seawater and artificial seawater experiments. Deposit of calcium sulfate CaSO4 on the heat transfer surface was observed in the experiments of artificial seawater. This deposit layer formation resulted in the initiation of slow heat transfer surface temperature excursion at a lower heat flux than a usual critical heat flux. A unique relation was confirmed between the concentration of artificial seawater in bulk fluid and the vaporization rate on the heat transfer surface at which the slow heat transfer surface temperature excursion was initiated. This relation suggested that if the bulk concentration of sea salts in seawater exceeded 11 wt%, the deposition of calcium sulfate on the heat transfer surface might occur even if a heat flux was zero.

Copyright (c) 2017 by ASME
Your Session has timed out. Please sign back in to continue.

References

Figures

Tables

Errata

Discussions

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In