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Experimental exploration of hybrid nanofluids as energy-efficient fluids in solar and thermal energy storage applications
In response to the issues of environment, climate, and human health coupled with the
growing demand for energy due to increasing population and technological advancement, the concept
of sustainable and renewable energy is presently receiving unprecedented attention. To achieve
these feats, energy savings and efficiency are crucial in terms of the development of energy-efficient
devices and thermal fluids. Limitations associated with the use of conventional thermal fluids led to
the discovery of energy-efficient fluids called “nanofluids, which are established to be better than
conventional thermal fluids. The current research progress on nanofluids has led to the development
of the advanced nanofluids coined “hybrid nanofluids” (HNFs) found to possess superior thermaloptical
properties than conventional thermal fluids and nanofluids. This paper experimentally
explored the published works on the application of HNFs as thermal transport media in solar
energy collectors and thermal energy storage. The performance of hybrid nano-coolants and nanothermal
energy storage materials has been critically reviewed based on the stability, types of hybrid
nanoparticles (HNPs) and mixing ratios, types of base fluids, nano-size of HNPs, thermal and optical
properties, flow, photothermal property, functionalization of HNPs, magnetic field intensity, and
orientation, and j, subject to solar and thermal energy storage applications. Various HNFs engaged
in different applications were observed to save energy and increase efficiency. The HNF-based media
performed better than the mono nanofluid counterparts with complementary performance when the
mixing ratios were optimized. In line with these applications, further experimental studies coupled
with the influence of magnetic and electric fields on their performances were research gaps to be filled
in the future. Green HNPs and base fluids are future biomaterials for HNF formulation to provide
sustainable, low-cost, and efficient thermal transport and energy storage media.
Singh, Ranjay; Bansal, Ramesh C.(Institute of Electrical and Electronics Engineers, 2018-12)
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