CCPortal
DOI10.1590/S1517-707620190002.0694
Characterization of new selective coatings, made of granite and chrome, for solar collectors
Albuquerque Araujo, Felipe Alves1; Aguiar Freire, Francisco Nivaldo2; Pinho, Diego Caitano2; Dutra, Kaio Hemerson2; Costa Rocha, Paulo Alexandre2; Vieira da Silva, Maria Eugenia2
发表日期2019
ISSN1517-7076
卷号24期号:2
英文摘要

The depletion of fossil fuel reserves and climate change caused by atmospheric pollution has led the human being to seek alternatives that are less damaging to the environment. The concern and the awareness of the population open space for the study of renewable energies to be deepened, among them the best use of solar energy.


The use of alternative materials to replace selective surfaces is a natural trend, since improvements in surface efficiency are usually sought while attempting to reduce costs. Composite substances are already used to obtain some selective surfaces, and, as a result, the search for better processes awakens research on more appropriate and lower cost materials, which represents a great scientific potential in the evolution of these technologies.


Thus, the present work consisted in obtaining and studying selective surfaces for applications in low-cost flat plate solar collectors, using residues from the granite industry. Five different surfaces were studied, varying the weight percentage: 100% granite powder, 75% granite powder + 25% chromium oxide, 50% granite powder + 50% chromium oxide, 25% granite powder + 75% chromium oxide and 100% chromium oxide.


For the tests, an experimental wooden stand was built, and it was possible to simulate the conditions of a flat plate solar collector. To characterize the surfaces, scanning electron microscope (SEM) techniques, infrared analysis, X-ray diffraction and UV-VIS absorbance determination, as well as graphs with surface temperatures and with radiation, during the tests in the sun, were used.


The surfaces' efficiency was determined by the ratio of the absorptivity by the emissivity, as well as the trademark MRTiNOX, a commercial selective surface applied on copper substrate. For this, an efficiency of 23.56 was obtained, while for the 50% granite and 50% chromium surfaces the value of 23.27 (closest to the trade mark) was calculated. Therefore, replacing the traditional components of selective surfaces with granite proved to be a satisfactory solution, contributing to the reduction of costs with work involving solar energy.


WOS研究方向Materials Science
来源期刊MATERIA-RIO DE JANEIRO
文献类型期刊论文
条目标识符http://gcip.llas.ac.cn/handle/2XKMVOVA/91099
作者单位1.Univ Fed Ceara, Lab Filmes Finos Energias Renovaveis LAFFER, PPGECM, BR-60440554 Fortaleza, Ceara, Brazil;
2.Univ Fed Ceara, Ave Mister Hull S-N,Campus Pici, Fortaleza, Ceara, Brazil
推荐引用方式
GB/T 7714
Albuquerque Araujo, Felipe Alves,Aguiar Freire, Francisco Nivaldo,Pinho, Diego Caitano,et al. Characterization of new selective coatings, made of granite and chrome, for solar collectors[J],2019,24(2).
APA Albuquerque Araujo, Felipe Alves,Aguiar Freire, Francisco Nivaldo,Pinho, Diego Caitano,Dutra, Kaio Hemerson,Costa Rocha, Paulo Alexandre,&Vieira da Silva, Maria Eugenia.(2019).Characterization of new selective coatings, made of granite and chrome, for solar collectors.MATERIA-RIO DE JANEIRO,24(2).
MLA Albuquerque Araujo, Felipe Alves,et al."Characterization of new selective coatings, made of granite and chrome, for solar collectors".MATERIA-RIO DE JANEIRO 24.2(2019).
条目包含的文件
条目无相关文件。
个性服务
推荐该条目
保存到收藏夹
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Albuquerque Araujo, Felipe Alves]的文章
[Aguiar Freire, Francisco Nivaldo]的文章
[Pinho, Diego Caitano]的文章
百度学术
百度学术中相似的文章
[Albuquerque Araujo, Felipe Alves]的文章
[Aguiar Freire, Francisco Nivaldo]的文章
[Pinho, Diego Caitano]的文章
必应学术
必应学术中相似的文章
[Albuquerque Araujo, Felipe Alves]的文章
[Aguiar Freire, Francisco Nivaldo]的文章
[Pinho, Diego Caitano]的文章
相关权益政策
暂无数据
收藏/分享

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。