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

Energies ◽  
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.

Trends and Opportunities in Direct-Absorption Solar Thermal Collectors

2013 ◽  
Vol 5 (2) ◽  
Author(s):  
Patrick Phelan ◽  
Todd Otanicar ◽  
Robert Taylor ◽  
Himanshu Tyagi
Keyword(s):  
Energy Conversion ◽  
Thermal Energy ◽  
Solar Thermal ◽  
Working Fluid ◽  
Direct Absorption ◽  
Solar Thermal Energy ◽  
Thermal Energy Conversion ◽  
Recent Developments ◽  
Solar Thermal Collectors ◽  
Photocatalytic Reactions

Efficient conversion of sunlight into useful heat or work is of increasing global interest. Solar-to-thermal energy conversion, as opposed to solar-to-electricity, is enabled by solar thermal collectors that convert sunlight into heat at some useful temperature. We review here recent developments in solar thermal energy conversion. Our emphasis is on “direct-absorption” solar thermal collectors, in which incident sunlight is absorbed directly by a working fluid. This contrasts with conventional solar thermal collectors where the sunlight strikes and is absorbed by a solid receiver, which then transfers heat to the working fluid. Both liquid-based and gas-based direct-absorption collectors are described, although liquid-based systems are emphasized. We propose that if “direct-absorption” technologies could be developed further, it would open up a number of emerging opportunities, including applications exploiting thermochemical and photocatalytic reactions and direct absorption of a binary fluid for absorption refrigeration.

Solar Thermal Energy Conversion

2007 ◽  
pp. 20-1-20-134
Author(s):  
Agami Reddy ◽  
Riccardo Battisti ◽  
Werner Weiss ◽  
Jeffrey Morehouse ◽  
Sanjay Vijayaraghavan ◽  
...  
Keyword(s):  
Energy Conversion ◽  
Thermal Energy ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Thermal Energy Conversion

Selective Surfaces for Solar Thermal Energy Conversion in CSP: From Multilayers to Nanocomposites

2017 ◽  
pp. 231-248 ◽  
Author(s):  
Audrey Soum-Glaude ◽  
Laurie Di Giacomo ◽  
Sébastien Quoizola ◽  
Thomas Laurent ◽  
Gilles Flamant
Keyword(s):  
Energy Conversion ◽  
Thermal Energy ◽  
Solar Thermal ◽  
Solar Thermal Energy ◽  
Thermal Energy Conversion

scholarly journals Ethylene glycol-based solar-thermal fluids dispersed with reduced graphene oxide

RSC Advances ◽  
2019 ◽  
Vol 9 (18) ◽  
pp. 10282-10288 ◽  
Author(s):  
Lei Shu ◽  
Jingyi Zhang ◽  
Benwei Fu ◽  
Jiale Xu ◽  
Peng Tao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Ethylene Glycol ◽  
Reduced Graphene Oxide ◽  
Thermal Energy ◽  
Solar Thermal ◽  
Direct Absorption ◽  
Solar Thermal Energy ◽  
Medium Temperature ◽  
Thermal Fluids ◽  
Reduced Graphene

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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