Ecological solar absorber coating: A proposal for the use of residual biomass and recycled materials for energy conversion
| Autor: | Luis Mariano Hernández-Ramírez, Luis Bernardo López-Sosa, Mariela Bravo-Sanchez, Mauricio González-Avilés, Tzarara López-Luke, J. Zárate-Medina, A. Medina-Flores |
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| Rok vydání: | 2020 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment Ecology business.industry 020209 energy chemistry.chemical_element 02 engineering and technology engineering.material 021001 nanoscience & nanotechnology Solar energy Laser flash analysis Characterization (materials science) chemistry Operating temperature Coating Thermal 0202 electrical engineering electronic engineering information engineering engineering Energy transformation General Materials Science 0210 nano-technology business Carbon |
| Zdroj: | Solar Energy. 202:238-248 |
| ISSN: | 0038-092X |
| Popis: | This paper discusses the development of a coating made of solid waste and residual biomass and its application as ecological solar absorber coating. This absorbent solar coating is made with a binder that consists of essential grapefruit rind oil and expanded polystyrene, both obtained from waste materials, as well as forest biomass soot (FBS) processed by mechanical grinding and used as a functional photothermal material. This mixture produces a paint that can be applied to metallic substrates to form a solar energy-absorbing surface. The characterization and evaluation is shown in three steps: (a) Characterization of the materials using XRD, SEM, TEM, XPS, Raman spectroscopy and IR; (b) coating evaluation using AFM, optical characterization to measure solar absorption, TG to determine the operating temperature and laser flash analysis to determine thermal conductivity; and (c) a testing with thermosolar technology to determine the thermal parameters of solar cookers. It has been identified that the pseudo-amorphous carbon in FBS has solar energy absorption capacity due to the sp2-sp3 bonds present in this kind of carbon, associated with the material’s graphitic domain. Also, results show that the coating can be used with thermosolar technologies operating above 250 °C with a solar absorption index above 96%, and it has thermally-efficient properties. In addition, the coating, it shows better results with solar cookers than other coatings used with this technology, increasing cooking power, so it can potentially be employed with various thermosolar technologies due to the replicability of its materials, its low environmental impact and low economic cost. |
| Databáze: | OpenAIRE |
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