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Pool boiling of water-Al2O3 and water-Cu nanofluids on horizontal smooth tubes.

Cieslinski JT, Kaczmarczyk TZ - Nanoscale Res Lett (2011)

Bottom Line: Nanoparticles were tested at the concentration of 0.01%, 0.1%, and 1% by weight.The horizontal smooth copper and stainless steel tubes having 10 mm OD and 0.6 mm wall thickness formed test heater.The results indicate that independent of concentration nanoparticle material (Al2O3 and Cu) has almost no influence on heat transfer coefficient while boiling of water-Al2O3 or water-Cu nanofluids on smooth copper tube.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Ecoengineering and Process Apparatus, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland. jcieslin@pg.gda.pl.

ABSTRACT
Experimental investigation of heat transfer during pool boiling of two nanofluids, i.e., water-Al2O3 and water-Cu has been carried out. Nanoparticles were tested at the concentration of 0.01%, 0.1%, and 1% by weight. The horizontal smooth copper and stainless steel tubes having 10 mm OD and 0.6 mm wall thickness formed test heater. The experiments have been performed to establish the influence of nanofluids concentration as well as tube surface material on heat transfer characteristics at atmospheric pressure. The results indicate that independent of concentration nanoparticle material (Al2O3 and Cu) has almost no influence on heat transfer coefficient while boiling of water-Al2O3 or water-Cu nanofluids on smooth copper tube. It seems that heater material did not affect the boiling heat transfer in 0.1 wt.% water-Cu nanofluid, nevertheless independent of concentration, distinctly higher heat transfer coefficient was recorded for stainless steel tube than for copper tube for the same heat flux density.

No MeSH data available.


Related in: MedlinePlus

Variation of present results with Cooper correlation [25]and Esawy et al. experimental data [26].
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Figure 10: Variation of present results with Cooper correlation [25]and Esawy et al. experimental data [26].

Mentions: and present results for atmospheric pressure have been compared with the experimental data by Esawy et al. [26] recorded for distilled water boiling on a smooth horizontal stainless steel tube of almost the same diameter (12.7 mm) heated by a cartridge heater. Figure 10 shows comparison of present experimental data with Cooper correlation taking heat flux density as abscissa and heat transfer coefficient as ordinate for the pool boiling of distilled water on horizontal stainless steel smooth tube. The experimental data for the boiling of distilled water are found to be in reasonable agreement with those predicted by Cooper correlation (within a band error ± 4.5%) as well as those obtained experimentally by Esawy et al. (within a band error ± 2%).


Pool boiling of water-Al2O3 and water-Cu nanofluids on horizontal smooth tubes.

Cieslinski JT, Kaczmarczyk TZ - Nanoscale Res Lett (2011)

Variation of present results with Cooper correlation [25]and Esawy et al. experimental data [26].
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211278&req=5

Figure 10: Variation of present results with Cooper correlation [25]and Esawy et al. experimental data [26].
Mentions: and present results for atmospheric pressure have been compared with the experimental data by Esawy et al. [26] recorded for distilled water boiling on a smooth horizontal stainless steel tube of almost the same diameter (12.7 mm) heated by a cartridge heater. Figure 10 shows comparison of present experimental data with Cooper correlation taking heat flux density as abscissa and heat transfer coefficient as ordinate for the pool boiling of distilled water on horizontal stainless steel smooth tube. The experimental data for the boiling of distilled water are found to be in reasonable agreement with those predicted by Cooper correlation (within a band error ± 4.5%) as well as those obtained experimentally by Esawy et al. (within a band error ± 2%).

Bottom Line: Nanoparticles were tested at the concentration of 0.01%, 0.1%, and 1% by weight.The horizontal smooth copper and stainless steel tubes having 10 mm OD and 0.6 mm wall thickness formed test heater.The results indicate that independent of concentration nanoparticle material (Al2O3 and Cu) has almost no influence on heat transfer coefficient while boiling of water-Al2O3 or water-Cu nanofluids on smooth copper tube.

View Article: PubMed Central - HTML - PubMed

Affiliation: Department of Ecoengineering and Process Apparatus, Gdansk University of Technology, Narutowicza 11/12, 80-233 Gdansk, Poland. jcieslin@pg.gda.pl.

ABSTRACT
Experimental investigation of heat transfer during pool boiling of two nanofluids, i.e., water-Al2O3 and water-Cu has been carried out. Nanoparticles were tested at the concentration of 0.01%, 0.1%, and 1% by weight. The horizontal smooth copper and stainless steel tubes having 10 mm OD and 0.6 mm wall thickness formed test heater. The experiments have been performed to establish the influence of nanofluids concentration as well as tube surface material on heat transfer characteristics at atmospheric pressure. The results indicate that independent of concentration nanoparticle material (Al2O3 and Cu) has almost no influence on heat transfer coefficient while boiling of water-Al2O3 or water-Cu nanofluids on smooth copper tube. It seems that heater material did not affect the boiling heat transfer in 0.1 wt.% water-Cu nanofluid, nevertheless independent of concentration, distinctly higher heat transfer coefficient was recorded for stainless steel tube than for copper tube for the same heat flux density.

No MeSH data available.


Related in: MedlinePlus