Numerical study of nanofluid heat transfer SiO2 through a solar flat plate collector

Abstract

This paper illustrates how practical application of nanoparticles (SiO2) as working fluid to stimulate solar flat plate collector efficiency with heat transfer modification properties. A numerical study of nanofluids laminar forced convection, permanent and stationary (SiO2), is conducted in a solar flat plate collector. The effectiveness of these nanofluids are compared to conventional working fluid (water), wherein the dynamic and thermal properties are evaluated for four volume concentrations of nanoparticles (1%, 3%, 5% and 10%), and this done for Reynolds number from 25 to 900. Results from the application of those nonfluids are obtained versus average temperature; pressure drop coefficient and Nusselt number are discussed later in this paper. Finally, we concluded that heat transfer increases with increasing both nanoparticles concentration and Reynolds number.

Heat Exchanges Intensification Through a Flat Plat Solar Collector by Using Nanofluids as Working Fluid

“…It can be seen from this results that, a very good matching between our results and those of the authors; which gives confidence in the numerical method employed Fig. 5 illustrate the temperature evolution distribution on the absorber plate for different values of inlet velocity (V= 0.001 to 0.05 m/s) presented by Maouassi et al (2017).…”

“…Available at www.ThermalFluidsCentral.org possible to reduce the exchange surface and improve the efficiency of these devices, which confirms the results of Natarajan et al (2009). Maouassi et al (2017) carried out a numerical study of forced convection heat transfer through a flat plate solar collector, the geometry is tested for 3D case, where water and SiO2-H2O nanofluid are used as a working fluid, the results obtained show that the increase of nanoparticles volume concentration gives an improvement in heat transfer rate reach 13.7% for 10% of nanoparticles volume concentration.…”

“…In order to validate the present results, the axial temperatures evolution of the working fluid along the absorber tube presented by Karanth et al (2011), Tagliafico et al (2014 and Maouassi et al (2017). The comparison results are exhibited in Fig.…”

“…The absorber plate is covered with glass plate with an air gap. Design parameters and fixed geometric parameters have been taken similar to Maouassi et al (2017), as indicated in Table. I. The heat transfer of nanofluide under laminar flow inside the absorber tube, as shown in Fig.…”

“…For boundary conditions and operating parameters are taken similar to Maouassi et al, 2017). For inlet 'velocity inlet' boundary condition is specified and an 'outflow' condition is specified at the outlet for the water domain.…”