Limits...
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

Boiling curves of smooth stainless steel tube in water-Al2O3 and water-Cu nanofluids with 0.1% concentration.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
getmorefigures.php?uid=PMC3211278&req=5

Figure 12: Boiling curves of smooth stainless steel tube in water-Al2O3 and water-Cu nanofluids with 0.1% concentration.

Mentions: Figures 11, 12, 13, and, 14 display influence of nanoparticle material on heat transfer during boiling of water-Al2O3 and water-Cu nanofluids on smooth copper and stainless steel tubes. Independent of concentration (0.1% and 1%), nanoparticle material (Al2O3 and Cu) has almost no influence when boiling of nanofluid water-Al2O3 or water-Cu takes place on smooth copper tube - Figures 11 and 13. Moreover, the adding of nanoparticles degrades heat transfer performance while boiling of water-Al2O3 and water-Cu nanofluids on copper smooth tube. For stainless steel tube and lower concentration tested (0.1%) - Figure 12, higher heat flux density was obtained for water-Al2O3 nanofluid than for water-Cu nanofluid. Water-Cu nanofluid displays slight superiority over water-Al2O3 nanofluid - with the same 1% concentration of nanoparticles, while boiling on smooth stainless steel tube and heat flux density above 40 kW/m2 - Figure 14.


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

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

Boiling curves of smooth stainless steel tube in water-Al2O3 and water-Cu nanofluids with 0.1% concentration.
© Copyright Policy - open-access
Related In: Results  -  Collection

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

Figure 12: Boiling curves of smooth stainless steel tube in water-Al2O3 and water-Cu nanofluids with 0.1% concentration.
Mentions: Figures 11, 12, 13, and, 14 display influence of nanoparticle material on heat transfer during boiling of water-Al2O3 and water-Cu nanofluids on smooth copper and stainless steel tubes. Independent of concentration (0.1% and 1%), nanoparticle material (Al2O3 and Cu) has almost no influence when boiling of nanofluid water-Al2O3 or water-Cu takes place on smooth copper tube - Figures 11 and 13. Moreover, the adding of nanoparticles degrades heat transfer performance while boiling of water-Al2O3 and water-Cu nanofluids on copper smooth tube. For stainless steel tube and lower concentration tested (0.1%) - Figure 12, higher heat flux density was obtained for water-Al2O3 nanofluid than for water-Cu nanofluid. Water-Cu nanofluid displays slight superiority over water-Al2O3 nanofluid - with the same 1% concentration of nanoparticles, while boiling on smooth stainless steel tube and heat flux density above 40 kW/m2 - Figure 14.

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