Numerical Simulations of an Al2O3-Water Nanofluid-Based Linear Fresnel Solar Collector
Küçük Resim Yok
Dosyalar
Tarih
2024
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
İstanbul Gelişim Üniversitesi Yayınları / Istanbul Gelisim University Press
Erişim Hakkı
info:eu-repo/semantics/openAccess
Özet
This study aims to numerically investigate the performance of Al2O3-water nanofluid as a heat transfer fluid (HTF) in
a linear Fresnel solar receiver. Although a reasonable number of studies have investigated the thermal behaviors of different
nanofluids as HTF in solar collectors, the focus has so far been on the parabolic trough collectors, with little or no research efforts
available for the linear Fresnel collectors. ANSYS-fluent software was utilized for the simulation in this study, which converted
the governing equations to algebraic forms based on the control-volume approach. The Nusselt number and wall temperature
were used to characterize the thermal performance of the nanofluid, while the friction factor and eddy viscosity were considered
to determine the flow features. The correlation equation proposed by Gnielinski was used to determine the Nusselt number, while
the flow features were computed using the Darcy-Weisbach equation. Additionally, the thermal performance of the nanofluid
was compared directly with that of pure water. Results showed that the nanofluid improved the thermal performance by about
6-19 % across the solar receiver length. Also, the Nusselt number increases non-uniformly across the length, with a significant
rise towards the trailing edge of the nanofluid flow. Conversely, the pressure drop also increases with an increase in the solar
receiver length, albeit uniformly. Designers should always factor into the design process to determine the optimum solar collector
length when a nanofluid is considered as the HTF; to maximize heat transfer and minimize pressure drop and its attendant
economic consequences.
Açıklama
Anahtar Kelimeler
Numerical simulation, Nanofluid, Al2O3 nanoparticles, Heat transfer analysis, Linear Fresnel collectors, Solar receivers
Kaynak
International Journal of Engineering Technologies IJET
WoS Q Değeri
Scopus Q Değeri
Cilt
9
Sayı
2
Künye
John, A., & Oyekale, J. (2024). Numerical Simulations of an Al2O3-Water Nanofluid-Based Linear Fresnel Solar Collector. International Journal of Engineering Technologies IJET, 9(2), 50-62. https://doi.org/10.19072/ijet.1152535
