Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
A numerical comparison among different water‐based hybrid nanofluids on their influences on natural convection heat transfer in a triangular solar collector for different tilt angles
Natural convection inside a triangular solar collector is investigated numerically for different nanofluids and hybrid nanofluids in this study. The individual effects of Al2O3–water, carbon nanotubes (CNT)–water, and Cu–water nanofluids are observed for different solid volume fractions of nanoparticles (0%–10%). Three types of hybrid nanofluids are prepared using different ratios of Al2O3, CNT, and Cu nanoparticles in water. A comparison is made varying the Rayleigh numbers within laminar range (103–106) for different tilt angles (0°, 30°, 60°, and 90°) of the solar collector. The inclined surface of the triangular solar collector is isothermally cold and the bottom wall (absorber plate) is isothermally hot, whereas the vertical wall with respect to the absorber plate is considered adiabatic. Average Nusselt numbers along the hot wall for different parameters are observed. Streamlines and isotherm contours are also plotted for different cases. Dimensionless governing Navier–Stokes and thermal energy conservation equations are solved by Galerkin weighted residual finite element method. Better convective heat transfer is found for higher Rayleigh number, solid volume fraction, and tilt angle. In the case of hybrid nanofluid, increasing the percentage of the nanoparticle that gives better heat transfer performance individually results in enhancing natural convection heat transfer inside the enclosure.
A numerical comparison among different water‐based hybrid nanofluids on their influences on natural convection heat transfer in a triangular solar collector for different tilt angles
Natural convection inside a triangular solar collector is investigated numerically for different nanofluids and hybrid nanofluids in this study. The individual effects of Al2O3–water, carbon nanotubes (CNT)–water, and Cu–water nanofluids are observed for different solid volume fractions of nanoparticles (0%–10%). Three types of hybrid nanofluids are prepared using different ratios of Al2O3, CNT, and Cu nanoparticles in water. A comparison is made varying the Rayleigh numbers within laminar range (103–106) for different tilt angles (0°, 30°, 60°, and 90°) of the solar collector. The inclined surface of the triangular solar collector is isothermally cold and the bottom wall (absorber plate) is isothermally hot, whereas the vertical wall with respect to the absorber plate is considered adiabatic. Average Nusselt numbers along the hot wall for different parameters are observed. Streamlines and isotherm contours are also plotted for different cases. Dimensionless governing Navier–Stokes and thermal energy conservation equations are solved by Galerkin weighted residual finite element method. Better convective heat transfer is found for higher Rayleigh number, solid volume fraction, and tilt angle. In the case of hybrid nanofluid, increasing the percentage of the nanoparticle that gives better heat transfer performance individually results in enhancing natural convection heat transfer inside the enclosure.
A numerical comparison among different water‐based hybrid nanofluids on their influences on natural convection heat transfer in a triangular solar collector for different tilt angles
Prince, Hasib A. (Autor:in) / Rozin, Enamul H. (Autor:in) / Chowdhury, Emdadul H. (Autor:in) / Redwan, Didarul A. (Autor:in) / Mamun, Mohammad A. H. (Autor:in)
Heat Transfer ; 50 ; 4264-4288
01.07.2021
25 pages
Aufsatz (Zeitschrift)
Elektronische Ressource
Englisch
Investigation on Heat Transfer Performances of Nanofluids in Solar Collector
| British Library Online Contents | 2011
| American Institute of Physics | 2009
Heat transfer calculation in a free convection air solar collector
| Online Contents | 1998
Performance on GaN-Based Light-Emitting Diodes with Different Substrate Tilt Angles
| British Library Online Contents | 2011