Published 8 issues per year
ISSN Print: 1065-5131
ISSN Online: 1563-5074
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Boiling Heat Transfer Characteristics in Small Vertical Tubes Submerged in Saturated nanoparticle Suspensions
ABSTRACT
An experimental study was carried out to understand the natural convective boiling heat transfer and the critical heat flux (CHF) of water and the nanoparticle suspensions in vertical small heated tubes. The study was focused on the influence of the nanoparticle mass concentration on the boiling heat transfer and the CHF. The experimental results indicated that the boiling heat transfer of nanoparticle suspensions is better than that of water. The CHF of the nanoparticle suspension is significantly increased compared with that of water. The CHF is only related to nanoparticle mass concentration for the fixed tube length and tube diameter. An empirical correlation was proposed for predicting the CHF of nanoparticle suspensions boiling in the vertical tubes.
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