Experimental Study on Heat Transfer Performance of the Solar Collector with an Inserted Heat Pipe Using Magnetic Nano-Fluids as the Working Fluid

Zhang, Yun Feng; Han, Kai; Xu, Ben; Chang, Zheng

doi:10.4028/www.scientific.net/amm.209-211.279

Cited by 1 publication

(1 citation statement)

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“…A different experimental system was introduced by Zhang et al, which comprised a glass evacuated solar collector with an inserted heat pipe (Zhang et al, 2012). There were two different types of heat collector devices with a heat pipe using magnetic nanofluids and water as the working fluid, respectively, researched for different tilt angles, climate conditions, and total solar radiations.…”

Section: Radiative Transfer and Nanoparticle Suspensionsmentioning

confidence: 99%

A Review of Optical and Radiative Properties of Nanoparticle Suspensions: Effects of Particle Stability, Agglomeration, and Sedimentation

Al-Gebory

Mengüç

2020

J Enh Heat Transf

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Nanoparticle suspensions (NPSs) are suspensions of nanosize particles in base fluids in the form of a solid-liquid mixture. They are used extensively in a wide range of industrial and engineering applications, and show considerably different and tunable, physiochemical, thermal, and radiative properties compared to other solutions. It has been demonstrated that added nanoparticles can significantly alter and enhance the optical and radiative properties of the base fluids. There is still a concern about the particle agglomeration and sedimentation behaviors and the long-term stability of NPSs under different conditions, which may limit their potential reliable applications. There is a close relationship between the particle agglomeration and the optical and radiative properties of nanoparticle suspensions. In this review, the relationship between these fundamental properties with the emphasis on the procedural stability of nanoparticle suspensions is explored. Different issues related to the preparation and the characterization of NPSs, their sedimentation, the effects of particle types, sizes on individual, hybrid, and agglomerated nanoparticle suspensions, as well as the effect of pH values, are discussed. Their effects on the optical and spectral radiative properties are also discussed. Simplified analyses are outlined based on dependent-independent scattering demarcation and effective properties of NPSs.

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Section: Radiative Transfer and Nanoparticle Suspensionsmentioning

confidence: 99%