Using of Cement Bypass for Making Solar Absorbers | ||||
| Egyptian Journal of Chemistry | ||||
| Volume 65, Issue 131, December 2022, Page 237-245 PDF (508.51 K) | ||||
| Document Type: Original Article | ||||
| DOI: 10.21608/ejchem.2022.114874.5216 | ||||
 View on SCiNiTO | ||||
| Authors | ||||
‪khaled Sayed Ragab   1; Nahed Abdel Hamid El Mahallawy2; Gamal Abu El Gheit Khater3
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| 1Faculty of Engineering, Ain shams university | ||||
| 2Faculty of Engineering Ain Shams University | ||||
| 3National Research Centre | ||||
| Abstract | ||||
| This thesis discusses the issue of absorbent surfaces used in the field of solar thermal energy and the method of manufacturing an absorbent surface from only one component instead of the traditional method that depends on the presence of a substrate and selective coating, using the wastes of cement factories. Our samples are made from glass which consists of cement factories waste (25 %) and silica sand with additives (75%). After manufacturing the basic sample of glass, free of any additives, it turned out to be a very transparent sample, which makes it not suitable to work as an absorbent surface. Therefore, some components had to be added to make the sample completely opaque. Accordingly, cobalt (0.2 and 0.4%) and basalt (10, 20, 30, and 40%) were added to the glass composition. The samples were investigated using XRF and tested for absorption in wavelength from (280 to 2400 nm). The best absorption sample was investigated using DTA to know the ability to do heat treatment. | ||||
| Keywords | ||||
| glass; cement bypass; solar absorbers; cobalt; basalt; absorbance | ||||
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