S. X. Suleymanov, V. G. Dyskin, M. U. Djanklich, N. A. Kulagina
{"title":"Computer Simulation of the Reflection Coefficient of Protective Coatings of Mirrors of Solar Devices","authors":"S. X. Suleymanov, V. G. Dyskin, M. U. Djanklich, N. A. Kulagina","doi":"10.3103/S0003701X23602004","DOIUrl":null,"url":null,"abstract":"<p>In solar technology mirrors are used with an outer and rear coating of a reflective layer. The reflection coefficient of mirrors with an external coating is greater than that of mirrors with a rear coating, but over time it decreases due to the destructive effects of the external environment. Therefore, solar technology began to apply mirrors with an external coating and a protective film to protect them from the effects of the external environment. The paper presents the results of computer simulation of protective films for aluminum mirrors. It is shown that dielectric films with a refractive index from 1.38 to 1.8 have practically no effect on the reflectance of an aluminum mirror if their thickness does not exceed 15 nm. To protect the surface of an aluminum mirror, SiO<sub>2</sub> + Al and ZnS + MgF<sub>2</sub> mixed films with a thickness from 10 to 15 nm with a SiO<sub>2</sub> and ZnS concentration of 10% are recommended. Of interest is a MgF<sub>2</sub> + ZnS film with a MgF<sub>2</sub> concentration of 43% and a thickness of 10–15 nm. The film reduces the reflection coefficient of the mirror by no more than 2% and has no internal stresses.</p>","PeriodicalId":475,"journal":{"name":"Applied Solar Energy","volume":"59 5","pages":"747 - 752"},"PeriodicalIF":1.2040,"publicationDate":"2024-03-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Applied Solar Energy","FirstCategoryId":"1","ListUrlMain":"https://link.springer.com/article/10.3103/S0003701X23602004","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q3","JCRName":"Energy","Score":null,"Total":0}
引用次数: 0
Abstract
In solar technology mirrors are used with an outer and rear coating of a reflective layer. The reflection coefficient of mirrors with an external coating is greater than that of mirrors with a rear coating, but over time it decreases due to the destructive effects of the external environment. Therefore, solar technology began to apply mirrors with an external coating and a protective film to protect them from the effects of the external environment. The paper presents the results of computer simulation of protective films for aluminum mirrors. It is shown that dielectric films with a refractive index from 1.38 to 1.8 have practically no effect on the reflectance of an aluminum mirror if their thickness does not exceed 15 nm. To protect the surface of an aluminum mirror, SiO2 + Al and ZnS + MgF2 mixed films with a thickness from 10 to 15 nm with a SiO2 and ZnS concentration of 10% are recommended. Of interest is a MgF2 + ZnS film with a MgF2 concentration of 43% and a thickness of 10–15 nm. The film reduces the reflection coefficient of the mirror by no more than 2% and has no internal stresses.
期刊介绍:
Applied Solar Energy is an international peer reviewed journal covers various topics of research and development studies on solar energy conversion and use: photovoltaics, thermophotovoltaics, water heaters, passive solar heating systems, drying of agricultural production, water desalination, solar radiation condensers, operation of Big Solar Oven, combined use of solar energy and traditional energy sources, new semiconductors for solar cells and thermophotovoltaic system photocells, engines for autonomous solar stations.