Properties of glycerol and ethylene glycol mixture based SiO 2 -CuO/C hybrid nanofluid for enhanced solar energy transport
Solar Energy Materials and Solar Cells, ISSN: 0927-0248, Vol: 179, Page: 118-128
2018
- 127Citations
- 135Captures
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Article Description
Hybrid nanofluids are a novel class of colloidal fluids which have drawn significant attention due to potential tailoring of their thermo-physical properties for heat transfer enhancement by a combination of more than one nano-additive to meet specific requirements of an application. In the present work, ceramic copper oxide/carbon (SiO 2 -CuO/C) nanoparticles in 80:20 (wt%) composition were prepared by ultrasonic-assisted wet mixing technique. The hybrid nanofluid was formulated by dispersing the nanoparticles into a base fluid mixture of 60:40 (% by mass) glycerol and ethylene glycol (G/EG) using the two-steps method. The influence of nanoparticles on the augmentation of specific heat, thermal conductivity and viscosity was examined in the volume concentration range of 0.5–2.0% in the temperature range of 303.15–353.15 K. The results demonstrate that the synthesized SiO 2 -CuO/C hybrid nanoparticles enhanced the thermo-physical properties of the base fluid mixture which is higher than using SiO 2 alone. In the case of SiO 2 –G/EG nanofluid, the specific heat capacity decremented by a maximum value of 5.7% whereas the thermal conductivity and viscosity incremented by 6.9% and 1.33-times as compared with G/EG at maximum volume concentration of 2.0% at a temperature of 353.15 K. Comparatively, a reinforcement of 80% SiO 2 with 20% CuO/C in G/EG mixture led to thermal conductivity and viscosity enhancement by 26.9% and 1.15-times, respectively with a significant reduction of specific heat by 21.1%. New empirical correlations were proposed based on the experimental data for evaluation of thermophysical properties.
Bibliographic Details
http://www.sciencedirect.com/science/article/pii/S0927024817305962; http://dx.doi.org/10.1016/j.solmat.2017.10.027; http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=85039054732&origin=inward; https://linkinghub.elsevier.com/retrieve/pii/S0927024817305962; https://dul.usage.elsevier.com/doi/; https://api.elsevier.com/content/article/PII:S0927024817305962?httpAccept=text/xml; https://api.elsevier.com/content/article/PII:S0927024817305962?httpAccept=text/plain; https://dx.doi.org/10.1016/j.solmat.2017.10.027
Elsevier BV
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