CHF enhancement by honeycomb porous plate in saturated pool boiling of nanofluid
CHF enhancement by honeycomb porous plate in saturated pool boiling of nanofluid
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DOI：
10.1080/00223131.2015.1087353
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发表时间：
2016-07
影响因子：
1.2
通讯作者：
S. Mori;Suazlan Mt Aznam;Ryuta Yanagisawa;Kunito Okuyama
中科院分区：
文献类型：
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作者：
S. Mori;Suazlan Mt Aznam;Ryuta Yanagisawa;Kunito Okuyama
严重事故的一个策略是堆芯熔化物碎片的容器内保留（IVR）。为了提高IVR在轻水堆严重事故情况下的能力，应考虑提高临界热流密度（CHF）的方法。增加IVR能力的方法必须简单，并且可以低成本安装。此外，IVR的冷却技术应适用于大的加热表面。因此，作为一个合适的冷却技术所需的条件下，我们提出了使用蜂窝多孔板冷却方法的CHF增强的大受热表面在饱和池沸腾纯水。在本文中，CHF增强蜂窝结构的多孔板的加热表面在一个TiO 2-水纳米流体的饱和池沸腾在常压下进行了实验研究。结果，蜂窝状多孔板的CHF随着纳米颗粒浓度的增加而增加。CHF显着提高高达3.2 MW/m2时，最大附着的蜂窝状多孔板与0.1体积%。纳米流体据作者所知，在大气压下，3.2MW/m2的CHF是直径超过30 mm的相对较大的加热表面的最高值。
One strategy for severe accidents is in-vessel retention (IVR) of corium debris. In order to enhance the capability of IVR in the case of a severe accident involving a light-water reactor, methods to increase the critical heat flux (CHF) should be considered. Approaches for increasing the IVR capability must be simple and installable at low cost. Moreover, cooling techniques for IVR should be applicable to a large heated surface. Therefore, as a suitable cooling technology for required conditions, we proposed cooling approaches using a honeycomb porous plate for the CHF enhancement of a large heated surface in a saturated pool boiling of pure water. In this paper, CHF enhancement by the attachment of a honeycomb-structured porous plate to a heated surface in saturated pool boiling of a TiO2-water nanofluid was investigated experimentally under atmospheric pressure. As a result, the CHF with a honeycomb porous plate increases as the nanoparticle concentration increases. The CHF is enhanced significantly up to 3.2 MW/m2 at maximum upon the attachment of a honeycomb porous plate with 0.1 vol.% nanofluid. To the best of the author's knowledge, under atmospheric pressure, a CHF of 3.2 MW/m2 is the highest value for a relatively large heated surface having a diameter exceeding 30 mm.