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Thermal properties of carbon black aqueous nanofluids for solar absorption.

Han D, Meng Z, Wu D, Zhang C, Zhu H - Nanoscale Res Lett (2011)

Bottom Line: The results showed that the nanofluids of high-volume fraction had better photothermal properties.Both carbon black powder and nanofluids had good absorption in the whole wavelength ranging from 200 to 2,500 nm.Carbon black nanofluids had good absorption ability of solar energy and can effectively enhance the solar absorption efficiency.

View Article: PubMed Central - HTML - PubMed

Affiliation: College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China. htzhu1970@163.com.

ABSTRACT
In this article, carbon black nanofluids were prepared by dispersing the pretreated carbon black powder into distilled water. The size and morphology of the nanoparticles were explored. The photothermal properties, optical properties, rheological behaviors, and thermal conductivities of the nanofluids were also investigated. The results showed that the nanofluids of high-volume fraction had better photothermal properties. Both carbon black powder and nanofluids had good absorption in the whole wavelength ranging from 200 to 2,500 nm. The nanofluids exhibited a shear thinning behavior. The shear viscosity increased with the increasing volume fraction and decreased with the increasing temperature at the same shear rate. The thermal conductivity of carbon black nanofluids increased with the increase of volume fraction and temperature. Carbon black nanofluids had good absorption ability of solar energy and can effectively enhance the solar absorption efficiency.

No MeSH data available.


Related in: MedlinePlus

UV-Vis-NIR transmittance spectra. (a) Water, (b) carbon black nanofluids.
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Figure 5: UV-Vis-NIR transmittance spectra. (a) Water, (b) carbon black nanofluids.

Mentions: Figure 5 shows the UV-Vis-NIR transmittance spectra of water and carbon black nanofluids. It can be seen that both the water and carbon black nanofluids have perfect absorption in the wavelength ranging from 1,400 to 2,500 nm, and carbon black nanofluids have lower transmittance than water in the wavelength ranging from 200 to 1,400 nm, indicating better solar absorption ability. These are responsible for the better photothermal properties of carbon black nanofluids.


Thermal properties of carbon black aqueous nanofluids for solar absorption.

Han D, Meng Z, Wu D, Zhang C, Zhu H - Nanoscale Res Lett (2011)

UV-Vis-NIR transmittance spectra. (a) Water, (b) carbon black nanofluids.
© Copyright Policy - open-access
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC3211877&req=5

Figure 5: UV-Vis-NIR transmittance spectra. (a) Water, (b) carbon black nanofluids.
Mentions: Figure 5 shows the UV-Vis-NIR transmittance spectra of water and carbon black nanofluids. It can be seen that both the water and carbon black nanofluids have perfect absorption in the wavelength ranging from 1,400 to 2,500 nm, and carbon black nanofluids have lower transmittance than water in the wavelength ranging from 200 to 1,400 nm, indicating better solar absorption ability. These are responsible for the better photothermal properties of carbon black nanofluids.

Bottom Line: The results showed that the nanofluids of high-volume fraction had better photothermal properties.Both carbon black powder and nanofluids had good absorption in the whole wavelength ranging from 200 to 2,500 nm.Carbon black nanofluids had good absorption ability of solar energy and can effectively enhance the solar absorption efficiency.

View Article: PubMed Central - HTML - PubMed

Affiliation: College of Materials Science and Engineering, Qingdao University of Science and Technology, Qingdao, 266042, China. htzhu1970@163.com.

ABSTRACT
In this article, carbon black nanofluids were prepared by dispersing the pretreated carbon black powder into distilled water. The size and morphology of the nanoparticles were explored. The photothermal properties, optical properties, rheological behaviors, and thermal conductivities of the nanofluids were also investigated. The results showed that the nanofluids of high-volume fraction had better photothermal properties. Both carbon black powder and nanofluids had good absorption in the whole wavelength ranging from 200 to 2,500 nm. The nanofluids exhibited a shear thinning behavior. The shear viscosity increased with the increasing volume fraction and decreased with the increasing temperature at the same shear rate. The thermal conductivity of carbon black nanofluids increased with the increase of volume fraction and temperature. Carbon black nanofluids had good absorption ability of solar energy and can effectively enhance the solar absorption efficiency.

No MeSH data available.


Related in: MedlinePlus