Analytical modeling and experimental investigation on optical properties of new class of nanofluids (Al2O3–CuO binary nanofluids) for direct absorption solar thermal energy

Ethylene glycol nanofluids uniformly dispersed with reduced graphene oxide were prepared for medium-temperature direct absorption-based solar-thermal energy harvesting.

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Seasonal Solar Thermal Energy Sand-Bed Storage in a Region with Extended Freezing Periods: Part I Experimental Investigation

Energies ◽

10.3390/en10111873 ◽

2017 ◽

Vol 10 (11) ◽

pp. 1873 ◽

Cited By ~ 5

Author(s):

Getu Hailu ◽

Philip Hayes ◽

Mark Masteller

Keyword(s):

Experimental Investigation ◽

Thermal Energy ◽

Solar Thermal ◽

Solar Thermal Energy

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An experimental investigation on the solar–thermal energy conversion performance of Fe 2 O 3 nanofluid with the focus on nanoparticles shape and concentration

International Journal of Energy Research ◽

10.1002/er.7553 ◽

2021 ◽

Author(s):

Seyed Mohammad Sadegh Hosseini ◽

Danesh Ayar ◽

Alireza Talebizadeh ◽

Mohammadmahdi Kamyabi

Keyword(s):

Experimental Investigation ◽

Energy Conversion ◽

Thermal Energy ◽

Solar Thermal ◽

Solar Thermal Energy ◽

Thermal Energy Conversion ◽

Conversion Performance

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Performance Evaluation of a Direct Absorption Collector for Solar Thermal Energy Conversion

Energies ◽

10.3390/en13184956 ◽

2020 ◽

Vol 13 (18) ◽

pp. 4956

Author(s):

Abdul Sattar ◽

Muhammad Farooq ◽

Muhammad Amjad ◽

Muhammad A. Saeed ◽

Saad Nawaz ◽

...

Keyword(s):

Graphene Oxide ◽

Energy Conversion ◽

Thermal Energy ◽

Solar Flux ◽

Solar Thermal ◽

Potential Candidate ◽

Direct Absorption ◽

Solar Thermal Energy ◽

Thermal Energy Conversion ◽

Water Based

The solar absorption efficiency of water as a base-fluid can be significantly improved by suspending nanoparticles of various materials in it. This experimental work presents the photo thermal performance of water-based nano-fluids of graphene oxide (GO), zinc oxide (ZnO), copper oxide (CuO), and their hybrids under natural solar flux for the first time. Nanofluid samples were prepared by the two-step method and the photothermal performance of these nanofluid samples was conducted under natural solar flux in a particle concentration range from 0.0004 wt % to 0.0012 wt %. The photothermal efficiency of water-based 0.0012 wt % GO nanofluid was 46.6% greater than that of the other nanofluids used. This increased photothermal performance of GO nanofluid was associated with its good stability, high absorptivity, and high thermal conductivity. Thus, pure graphene oxide (GO) based nanofluid is a potential candidate for direct absorption solar collection to be used in different solar thermal energy conversion applications.

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Impact of Size and Scattering Mode on the Optimal Solar Absorbing Nanofluid

ASME 2009 3rd International Conference on Energy Sustainability, Volume 1 ◽

10.1115/es2009-90066 ◽

2009 ◽

Cited By ~ 20

Author(s):

Todd Otanicar ◽

Robert A. Taylor ◽

Patrick E. Phelan ◽

Ravi Prasher

Keyword(s):

Particle Size ◽

Optical Properties ◽

Solar Thermal ◽

Thermal System ◽

Direct Absorption ◽

Solar Thermal Energy ◽

Nanoparticle Suspension ◽

Solar Thermal Collector ◽

Solar Thermal System ◽

The Impact

The concept of using a direct absorbing nanofluid, a liquid-nanoparticle suspension, has recently been shown numerically and experimentally to be an efficient method for harvesting solar thermal energy. Studies show that the size and shape of the nanoparticles as well as the scattering mode (e.g. dependent, independent, and multiple) all impact the amount of energy absorbed and emitted by the nanofluid. In order to optimize the efficiency of a direct absorption solar thermal system the optimum nanoparticle-liquid combination needs to be developed. The optimum nanofluid for a direct absorption solar thermal collector is investigated numerically through the variation of particle size, including the impact of size on optical properties, and scattering mode. The study addresses both the absorption of solar energy within the fluid as well as the emission of the fluid.

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