Systematic measurements of heat transfer characteristics in saturated pool boiling of water-based nanofluids. (November 2016)

• Record Type: Journal Article
• Authors: Zuhairi Sulaiman, Muhamad; Matsuo, Daisuke; Enoki, Koji; Okawa, Tomio
• Is Part Of: International journal of heat and mass transfer. Volume 102(2016:Nov.)
• Page Start: 264
• Page End: 276
• Publication Date: 2016-11
• Subjects: Nanofluid -- Saturated pool boiling -- Particle material -- Particle concentration -- Particle dispersion condition -- Heat transfer coefficient -- Critical heat flux; Heat -- Transmission -- Periodicals; Mass transfer -- Periodicals; Chaleur -- Transmission -- Périodiques; Transfert de masse -- Périodiques; Electronic journals; 621.4022
• DOI: 10.1016/j.ijheatmasstransfer.2016.06.017
• Languages: English
• ISSNs: 0017-9310

Abstract

Highlights: Pool boiling heat transfer of water-based nanofluids was studied systematically. Boiling curve depended on nanoparticle' material and concentration significantly. Nanoparticle layer detachment deteriorated the boiling heat transfer abnormally. CHF was 2.5–3 times higher in the nanofluids than in the pure water. Abstract: Experiments were carried out to investigate the heat transfer characteristics in saturated pool boiling of water-based nanofluids. An upward-facing copper surface of 20 mm in diameter was used as the heated surface. Main experimental parameters in this work were nanoparticles' material (TiO2, Al2 O3 and SiO2 ), mass concentration (0.04, 0.4 and 1 kg/m 3 ) and dispersion condition (fine and coarse dispersions). Effects of these parameters on the time-variation of wall superheat under constant heat flux, the heat transfer coefficient (boiling curve) and the critical heat flux (CHF) were explored. It was found that the particle dispersion condition has no noticeable influence on the heat transfer characteristics within the range tested in this work. Whilst, the material and concentration of nanoparticles greatly affected the time-variation of wall superheat and the boiling curve. In particular, it was found that the wall superheat likely to increase significantly when the nanoparticle layer formed on the heated surface is partially detached. The CHF in nanofluid was 2.5–3 times higher than that for pure water in all the experimental conditions.