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Keywords
(11)
Carbon Nanotube
Environmental Impact
Experimental Data
Numerical Model
Renewable Energy
Solar Collector
Solar Energy
Thermal Conductivity
Thermophysical Properties
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Nanofluid-based direct absorption solar collector
Nanofluid-based direct absorption solar collector,10.1063/1.3429737,Journal of Renewable and Sustainable Energy,Todd P. Otanicar,Patrick E. Phelan,Rav
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Nanofluid-based direct absorption solar collector
(
Citations: 5
)
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Todd P. Otanicar
,
Patrick E. Phelan
,
Ravi S. Prasher
,
Gary Rosengarten
,
Robert A. Taylor
Solar energy
is one of the best sources of
renewable energy
with minimal environmental impact. Direct absorption solar collectors have been proposed for a variety of applications such as water heating; however the efficiency of these collectors is limited by the absorption properties of the working fluid, which is very poor for typical fluids used in solar collectors. It has been shown that mixing nanoparticles in a liquid (nanofluid) has a dramatic effect on the liquid
thermophysical properties
such as thermal conductivity. Nanoparticles also offer the potential of improving the radiative properties of liquids, leading to an increase in the efficiency of direct absorption solar collectors. Here we report on the experimental results on solar collectors based on nanofluids made from a variety of nanoparticles (carbon nanotubes, graphite, and silver). We demonstrate efficiency improvements of up to 5% in solar thermal collectors by utilizing nanofluids as the absorption mechanism. In addition the
experimental data
were compared with a
numerical model
of a
solar collector
with direct absorption nanofluids. The experimental and numerical results demonstrate an initial rapid increase in efficiency with volume fraction, followed by a leveling off in efficiency as
volume fraction
continues to increase.
Journal:
Journal of Renewable and Sustainable Energy
, vol. 2, no. 3, 2010
DOI:
10.1063/1.3429737
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Citation Context
(3)
...This nanofluid-based concentrating solar water heating system works on the principle of direct absorption
[5,6]
of the solar irradiance by the nanofluid through scattering and absorption mechanisms...
Vikrant Khullar
,
et al.
A study on environmental impact of nanofluid-based concentrating solar...
... Otanicar
et al
...
David Erickson
,
et al.
Optofluidics for energy applications
...In the last few years, the co-authors [
21-23
] and others [24,25] have explored their potential towards developing a new type of direct absorption (or volumetric) solar thermal collector...
Robert A Taylor
,
et al.
Nanofluid optical property characterization: towards efficient direct ...
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Citations
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A study on environmental impact of nanofluid-based concentrating solar water heating system
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