Nanofluids for power engineering: Emergency cooling of overheated heat transfer surfaces
- Authors: Bondarenko B.I.1, Moraru V.N.1, Sidorenko S.V.1, Komysh D.V.1
-
Affiliations:
- The Gas Institute
- Issue: Vol 42, No 7 (2016)
- Pages: 677-681
- Section: Article
- URL: https://journals.rcsi.science/1063-7850/article/view/199911
- DOI: https://doi.org/10.1134/S106378501607004X
- ID: 199911
Cite item
Abstract
The possibility of emergency cooling of an overheated heat transfer surface using nanofluids in the case of a boiling crisis is explored by means of synchronous recording of changes of main heat transfer parameters of boiling water over time. Two nanofluids are tested, which are derived from a mixture of natural aluminosilicates (AlSi-7) and titanium dioxide (NF-8). It is found that the introduction of a small portions of nanofluid into a boiling coolant (distilled water) in a state of film boiling (theater > 500°C) can dramatically decrease the heat transfer surface temperature to 130–150°C, which corresponds to a transition to a safe nucleate boiling regime without affecting the specific heat flux. The fact that this regime is kept for a long time at a specific heat load exceeding the critical heat flux for water and theater = 125–130°C is particularly important. This makes it possible to prevent a potential accident emergency (heater burnout and failure of the heat exchanger) and to ensure the smooth operation of the equipment.
About the authors
B. I. Bondarenko
The Gas Institute
Email: vasily.moraru@gmail.com
Ukraine, Kyiv, 03113
V. N. Moraru
The Gas Institute
Author for correspondence.
Email: vasily.moraru@gmail.com
Ukraine, Kyiv, 03113
S. V. Sidorenko
The Gas Institute
Email: vasily.moraru@gmail.com
Ukraine, Kyiv, 03113
D. V. Komysh
The Gas Institute
Email: vasily.moraru@gmail.com
Ukraine, Kyiv, 03113