Nucleate pool boiling heat transfer of binary nano mixtures under atmospheric pressure around a smooth horizontal cylinder

Sarafraz, M.M.; Peyghambarzadeh, S.M.; Fazel, Seyed Ali Alavi; Vaeli, N

doi:10.3311/ppch.2173

Cited by 42 publications

(13 citation statements)

References 15 publications

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“…The heat transfer coefficient increases with increasing mass flow rate of the hot water as well as nanofluid. Recently, Sarafraz et al conducted some experimental investigations on pool boiling heat transfer of nanofluids around the horizontal cylinder [19,20]. Also, among very few studies on flow boiling of nanofluids, Kim et al [9] represented about 50% enhancement in flow boiling Critical Heat Flux (CHF) for Al 2 O 3 /water nanofluids flowing through a vertical stainless steel tube.…”

Section: Introductionmentioning

confidence: 99%

Forced Convective and Nucleate Flow Boiling Heat Transfer to Alumnia Nanofluids

Sarafraz

Hormozi

2014

Per. Pol. Chem. Eng.

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Section: Introductionmentioning

confidence: 99%

Forced Convective and Nucleate Flow Boiling Heat Transfer to Alumnia Nanofluids

Sarafraz

Hormozi

2014

Per. Pol. Chem. Eng.

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“…Limited application of nano-fluids was demonstrated by Das et al, due to deposition of the nano-fluids on the heating surface, which caused the heat transfer coefficient of nucleate boiling region to significantly deteriorate 13 . Recently, Ahn et al and Sarafraz et al in their experiments showed that using the nano-fluid can enhance the convective and nucleate heat transfer boiling due to increased wettability of the surface as well as thermal conductivity of the fluid [14][15][16] . After publishing our previous works [17][18][19] , we were determined to investigate the convective boiling heat transfer of stabilized dilute CuO 2 ), and weight percentages of 0.1-0.4 on the heat transfer coefficient in both heat transfer regions (forced convection and nucleate boiling) is experimentally investigated.…”

Section: Introductionmentioning

confidence: 99%

Application of Spherical Copper Oxide (II) Water Nano-fluid as a Potential Coolant in a Boiling Annular Heat Exchanger

Nikkhah

Sarafraz

Hormozi

2015

Chem. Biochem. Eng. Q.

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Convective boiling heat transfer coefficient of spherical CuO (II) nanoparticles dispersed in water is experimentally quantified inside the vertical heat exchanger. Influence of different operating parameters including applied heat and mass fluxes, sub-cooling temperature and concentration of nano-fluid on forced convection and nucleate boiling heat transfer mechanisms is experimentally investigated and briefly discussed. Results show that by increasing heat and mass fluxes, the heat transfer coefficient considerably increases for both heat transfer regions, while by increasing the nanoparticle weight concentration, the heat transfer coefficient increases in convective heat transfer (about 35 % at the maximum concentration) and deteriorates the heat transfer coefficient (about 9 % at maximum concentration) in nucleate boiling region due to the formation of nanoparticle deposition on heating surface. Experimental results are then compared to well-known correlations. Results of comparisons reveal good agreement between experimental data and those obtained by some correlations. In addition, thermo-physical properties of CuO nano-fluid are experimentally measured and represented, which are a good reference for other nano-fluid-related studies.

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“…The main reason for this fact can be referred to the fouling formation of nano-particles on the surface, intensification of capillary wicking and also changing in other surface characteristics such as contact angle due to the deposition. Sarafraz et al [6][7][8][9][10] established experimental studies on fouling formation and heat transfer characteristics of metal oxide nano-fluids and showed that fouling is a negative parameter which influence on bubble formation and heat transfer rate. In fact, depending on the surface roughness and type of nanoparticles enhancement/deterioration of heat transfer coefficient can be seen for nano-fluids.…”

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confidence: 99%