Full-spectrum volumetric solar thermal conversion via graphene/silver hybrid plasmonic nanofluids
By Mohammad Mehrali, Murali Krishna Ghatkesar, Rene Pecnik. Applied Energy, 2018
172 citations recorded by the source corpus.
The wide-spread adoption of solar thermal absorbers is currently hampered by their low absorption efficiencies and their high capital cost. As a result, a number of initiatives, including direct absorption solar collectors (DASC), are currently underway to improve the absorber efficiencies. In this regard, this study focused on application of hybrid nanofluids containing reduced graphene oxides decorated with silver nanoparticles in volumetric solar absorbers. Their superior solar absorptance and thermal conductivity is based on the plasmonic effect of the nanoparticles and high thermal conductivity of graphene nanosheets, respectively. Several parameters such as mass concentration of graphene nanosheets and Ag decoration contents were studied that could affect the thermal and optical properties of the nanofluids. The results indicated that the prepared nanofluids can be employed for direct absorption solar collectors over a short period of solar irradiation time, even at a low illumination intensity of one sun. A collector efficiency of 77% is achievable at low concentration of 40 ppm owing to the enhanced light absorption of graphene at the excitation wavelength. These findings therefore suggest that this solution can contribute to the final goal of utilizing nanofluids for efficient solar thermal energy harvesting.
Subfields: Biomedical Engineering, Renewable Energy, Sustainability and the Environment
View Paper: https://www.semanticscholar.org/paper/59ddd7fe50d5dab7fb89767bde63aa5cf7cc766f
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In Biomedical Engineering
In Renewable Energy, Sustainability and the Environment
Citations in the corpus
- Simultaneous solar-thermal energy harvesting and storage via shape stabilized salt hydrate phase change material (2021, background): “The solar energy harvesting and exploitation as distinguished renewable energy resource is a major area for research and development (R&D) [2].”
- Phase Change Materials (PCM) for Solar Energy Usages and Storage: An Overview (2019, background): “In comparing solar thermal conversion and solar electrical direct conversion, it has been found that solar thermal conversion is more efficient by about 70% compared to 17% for solar electrical direct conversion systems [91,92].”