Characteristic of TiO2-SiO2 Nanofluid With Water/Ethylene Glycol Mixture for Solar Application

Abstract

Solar energy is a sustainable energy supply technology due to the renewable nature of solar radiation and the ability of solar energy conversion systems to generate greenhouse gas-free heat and electricity during their lifetime. In this study, an experimental investigation was conducted to explore the effect of hybrid nanofluids on heat transfer for solar application. An experiment was conducted for hybrid nanofluid concentrations starting from 0.3, 0.5, 0.7 and 1.0%. Each setup was exposed to short wavelength radiation under a solar simulator with 300, 500 and 700 W/m2 for 30 minutes, of which 15 minutes is the heating period and the next 15 minutes is for cooling. For solar radiation of 300 W/m2 within 15 minutes of charging process are 51.9 °C, 52.8 °C, 53.4 °C and 54.2 °C for concentration of nanofluids 0.3, 0.5, 0.7 and 1.0% respectively. The results for solar radiation of 500 and 700 W/m2 within 15 minutes almost the same pattern which is increasing during the charging process. It can be concluded that the higher concentrations of nanofluid give ample time to the test tube to transfer the heat and thus increased its temperature during the charging process.

Experimental Investigation for Enhancement of Heat Transfer Coefficient in Car Radiator by Using Multiwall Carbon Nanotube (MWCNT) Nanofluid

“…Fikri et al [25] investigated the viscosity and thermal conductivity of a SiO2-TiO2 nanofluid using EG/water in an automobile radiator, and the nanofluids were prepared in one step method. The results demonstrate that at a concentration of 1% and a temperature of 60 °C, there is an increase of thermal conductivity.…”

Numerical Study on the Effect of Using CuO-Water Nanofluid as a Heat Transfer Fluid on the Performance of the Parabolic Trough Solar Collector

“…Many studies were executed to developing heat transfer from the receiver tube to the heat transfer fluid. One of the heat transfer limitations that has to be enhances is the low thermal conductivity of the heat transfer fluid [5][6][7][8]. Therefore, a novel nanofluid has been used where the thermal properties of the base fluid improved by adding small quantities of specified metal nanoparticles to the base fluid.…”

Intrinsic Properties of Multi-Layer TiO2/V2O5/TiO2 Coatings Prepared via E-Beam Evaporation

“…TiO 2 has been diversely employed in solar devices in the form of cathodes, light scatterers, electron collectors, high wavelength transmitters, etc. These applications are possible due to its tunable conductivity, resistance to weathering, self-cleaning ability, excellent transmittance of solar radiation, and ease of fabrication [ 31 , 32 , 33 , 34 , 35 , 36 , 37 , 38 , 39 , 40 , 41 , 42 , 43 , 44 , 45 , 46 , 47 ]. TiO 2 has been utilized in the form of a mesoporous nanostructure to increase scattering, which increases the interaction of light with absorbing materials and eventually improves the absorption efficiency [ 31 ].…”

“…The three crystalline forms of TiO 2 have different crystal structures, and thus their optical properties also differ [ 32 ]. The anatase phase of TiO 2 thin films is promising for applications in optics because of its high transparency in the visible region and its high reflective index [ 33 ]. Furthermore, V 2 O 5 films along with TiO 2 have been prepared using the electron beam evaporation technique due to its cost-effectiveness, easy control of parameters, uniformity, and stoichiometry, which is still a challenge in other PVD fabricated films.…”