Navegando por Data de Publicação, começando com "2012-07-26"

Filtrar resultados por ano ou mês

Agora exibindo 1 - 2 de 2

Fornos para fusão e espera para indústria de alumínio : caracterização de materiais refratários e conservação de energia
(Universidade Federal de São Carlos, 2012-07-26) Novo, Marcela Munhoz Monteiro; Pandolfelli, Victor Carlos; https://lattes.cnpq.br/7369376873984839; https://lattes.cnpq.br/0705464450293982
The industrial need to reduce energy consumption is part of a continuous evolution towards higher levels of sustainability and competitiveness. Considering these aspects, the search for alternatives to improve the performance of melting and holding furnaces in the aluminum industry is directly dependent on the refractory materials ability to keep heat and withstand the mechanical, chemical and thermal degradation processes. Therefore, five dense high-alumina commercial refractories were characterized according to their thermo-mechanical properties, physical features and aluminum corrosion resistance. The results pointed out that choosing the most suitable composition requires the evaluation of the chemical aspects and thermal shock resistance. Moreover, the understanding of high emissivity coatings applications was also focused in order to develop an alternative which could increase heat savings. Thus, two methods were developed to analyze the coating efficiency: a) the temperature measurement of painted specimens fired at different temperatures in a furnace; and b) the heating curve profile of a ceramic sample during firing in a furnace lined with refractories previously coated with high emissivity paint. Three commercial products were characterized and both evaluation methods showed that the high emissivity coating affected the sample heating, although a reduction in its efficiency was observed during the testing cycles. Furthermore, in order to attest the effectiveness in industrial practices, a high emissivity coating was applied on the refractory walls of a melting aluminum transport crucible. The results showed that the combined analysis involving the correct selection of refractories and application of high emissivity coatings can open new paths toward cost reduction and industrial sustainability.
Áreas marginais a corpos hídricos urbanos: delimitação e zoneamento ambiental. Área piloto: bacia do córrego Santa Maria Madalena em São Carlos, SP
(Universidade Federal de São Carlos, 2012-07-26) Felicio, Bruna da Cunha; Salvador, Nemésio Neves Batista; https://lattes.cnpq.br/9930582531600560
This research seeks to meet the demand for information assisting public administrators in making decisions about urban development. Along these lines, this case study on Santa Madalena Stream watershed (SMSW), São Carlos, Brazil, aims to supplement Federal Law No. 12,651, of May 25, 2012, which establishes permanent protection areas (PPAs) adjacent to water bodies. To this end, it considers local specificities and provides a tool for protecting watersheds and improving the quality of life of surrounding populations. The main objective of this study is to develop and propose criteria and guidelines for the protection of urban watersheds through an environmental zoning (ZA) process conducive to establishing land occupancy modes and priorities as well as drawing up legal regulations on a local scope. This study indicates that the aforementioned law should take into account local demands and specificities while abiding by its fundamental principles. The procedure presented herein may ultimately contribute to public administrators‟ strategic planning for land use and occupancy and supplementing Federal Law no. 12,651 in order to promote environmental protection and urban development consistent with preserving PPAs. In carrying out this study, the researchers aimed to contribute to public administrations‟ urban planning and environmental management. In this manner, it provides a basis for establishing priority areas for environmental protection and improving public policies on this subject