TY - JOUR
T1 - Photo-thermal characteristics of water-based Fe3O4@SiO2 nanofluid for solar-thermal applications
AU - Khashan, Saud Abdelaziz
AU - Dagher, Sawsan
AU - Omari, Salahaddin Al
AU - Tit, Nacir
AU - Elnajjar, Emad
AU - Mathew, Bobby
AU - Al Naqbi, Ali Abdullah Hilal
N1 - Funding Information:
The authors acknowledge financial support received from the UAEU research fund, Grant no. 31N158, UAE.
Publisher Copyright:
© 2017 IOP Publishing Ltd
PY - 2017/5
Y1 - 2017/5
N2 - This work proposes and demonstrates the novel idea of using Fe3O4@SiO2 core/shell structure nanoparticles (NPs) to improve the solar thermal conversion efficiency. Magnetite (Fe3O4) NPs are synthesized by controlled co-precipitation method. Fe3O4@SiO2 NPs are prepared based on sol–gel approach, then characterized. Water-based Fe3O4@SiO2 nanofluid is prepared and used to illustrate the photo-thermal conversion characteristics of a solar collector under solar simulator. The temperature rise characteristics of the nanofluids are investigated at different heights of the solar collector, for duration of 300 min, under a solar intensity of 1000 W m−2. The experimental results show that Fe3O4@SiO2 NPs have a core/shell structure with spherical morphology and size of about 400 nm. Fe3O4@SiO2/H2O nanofluid enhances the photo-thermal conversion efficiency compared with base fluid and Fe3O4/H2O nanofluid, since the silica coating improves both the thermodynamic stability of the nanofluid and the light absorption effectiveness of the NPs. At a concentration of 1 mg/1 ml of Fe3O4@SiO2/H2O, and with the utilization of kerosene into the solar collector, and exposure for radiation for 5 min, the photo-thermal conversion efficiency has shown an enhancement at the bottom of the collector of about 32.9% compared to the base fluid.
AB - This work proposes and demonstrates the novel idea of using Fe3O4@SiO2 core/shell structure nanoparticles (NPs) to improve the solar thermal conversion efficiency. Magnetite (Fe3O4) NPs are synthesized by controlled co-precipitation method. Fe3O4@SiO2 NPs are prepared based on sol–gel approach, then characterized. Water-based Fe3O4@SiO2 nanofluid is prepared and used to illustrate the photo-thermal conversion characteristics of a solar collector under solar simulator. The temperature rise characteristics of the nanofluids are investigated at different heights of the solar collector, for duration of 300 min, under a solar intensity of 1000 W m−2. The experimental results show that Fe3O4@SiO2 NPs have a core/shell structure with spherical morphology and size of about 400 nm. Fe3O4@SiO2/H2O nanofluid enhances the photo-thermal conversion efficiency compared with base fluid and Fe3O4/H2O nanofluid, since the silica coating improves both the thermodynamic stability of the nanofluid and the light absorption effectiveness of the NPs. At a concentration of 1 mg/1 ml of Fe3O4@SiO2/H2O, and with the utilization of kerosene into the solar collector, and exposure for radiation for 5 min, the photo-thermal conversion efficiency has shown an enhancement at the bottom of the collector of about 32.9% compared to the base fluid.
KW - Fe3O4@SiO2 nanoparticle
KW - Nanofluid
KW - Photo-thermal conversion
KW - Solar collector
UR - http://www.scopus.com/inward/record.url?scp=85037037290&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=85037037290&partnerID=8YFLogxK
U2 - 10.1088/2053-1591/aa6c15
DO - 10.1088/2053-1591/aa6c15
M3 - Article
AN - SCOPUS:85037037290
SN - 2053-1591
VL - 4
JO - Materials Research Express
JF - Materials Research Express
IS - 5
M1 - 055701
ER -