A calculation model incorporating the heat loss is used to study the photothermal conversion characteristics of Ag nanofluids in this work. Adding nanoparticles to the traditional working fluid enhances the light absorption and scattering to obtain better photothermal conversion abilities. The Ag nanofluid with a particle volume fraction of 2.5×10-6 leads to the maximum temperature rise of 67.31℃, which is 1.8 times that of the base fluid. However, its photothermal conversion efficiency is 2.9 times that of the base liquid since the heat loss is taken into account in the calculation model. With the increase in particle concentration, the temperature rise and the photothermal conversion efficiency gradually increase, and the change rates of temperature rise and photothermal conversion efficiency become gradually small.
CHEN Meijie
,
TANG Tianqi
,
LIU Ziyu
,
HE Yurong
. Investigating on photothermal conversion properties of plasmonic Ag nanofluids[J]. Journal of University of Chinese Academy of Sciences, 2018
, 35(2)
: 222
-226
.
DOI: 10.7523/j.issn.2095-6134.2018.02.011
[1] Otanicar T P, Phelan P E, Golden J S. Optical properties of liquids for direct absorption solar thermal energy systems[J]. Solar Energy, 2009, 83(7):969-977.
[2] Otanicar T P, Phelan P E, Prasher R S, et al. Nanofluid-based direct absorption solar collector[J]. Journal of Renewable & Sustainable Energy, 2010, 2(3):1-13.
[3] Yousefi T, Veysi F, Shojaeizadeh E, et al. An experimental investigation on the effect of Al2O3-H2O nanofluid on the efficiency of flat-plate solar collectors[J]. Renewable Energy, 2012, 39(1):293-298.
[4] Zamzamian A, Keyanpourrad M, Kianineyestani M, et al. An experimental study on the effect of Cu-synthesized/EG nanofluid on the efficiency of flat-plate solar collectors[J]. Renewable Energy, 2014, 71(11):658-664.
[5] Xuan Y, Duan H, Li Q. Enhancement of solar energy absorption using a plasmonic nanofluid based on TiO2/Ag composite nanoparticles[J]. RSC Advances, 2014, 4(31):16206-16213.
[6] Sani E, Mercatelli L, Barison S, et al. Potential of carbon nanohorn-based suspensions for solar thermal collectors[J]. Solar Energy Materials & Solar Cells, 2011, 95(11):2994-3000.
[7] Dong X, Ji X, Wu H, et al. Shape control of silver nanoparticles by stepwise citrate reduction[J]. Journal of Physical Chemistry C, 2009, 113(16):6573-6576.
[8] Cole J R, Mirin N A, Knight M W, et al. Photothermal efficiencies of nanoshells and nanorods for clinical therapeutic applications[J]. Journal of Physical Chemistry C, 2009, 113(28):12090-12094.
[9] Chen H, Shao L, Ming T, et al. Understanding the photothermal conversion efficiency of gold nanocrystals[J]. Small, 2010, 6:2272-2280.
[10] Jiang K, Smith D A, Pinchuk A. Size-dependent photothermal conversion efficiencies of plasmonically heated gold nanoparticles[J]. The Journal of Physical Chemistry C, 2013, 117(51):27073-27080.
