Avaliação do desempenho térmico de mantas isolantes em guaritas de fibra de vidro

• Ano de defesa: 2017
• Autor(a) principal: Suetake, Graziela Yumi
• Tipo de documento: Dissertação
• Tipo de acesso: Acesso aberto
• Idioma: por
• Instituição de defesa: Universidade Tecnológica Federal do Paraná; Curitiba; Brasil; Programa de Pós-Graduação em Engenharia Civil; UTFPR
• Palavras-chave em Português: Alumínio - Reaproveitamento; Sustentabilidade; Fibras de vidro; Construção civil; Calor - Transmissão; Materiais isolantes; Isolamento térmico; Embalagens; Aluminum - Recycling; Engenharia civil; Sustainability; Glass fibers; Construction; Heat - Transmission; Insulating materials; Insulation (Heat); Packaging; Civil engineering; CNPQ::CIENCIAS SOCIAIS APLICADAS::ARQUITETURA E URBANISMO; Engenharia Civil
• Link de acesso: http://repositorio.utfpr.edu.br/jspui/handle/1/2780

In light-weight buildings under the climatic conditions of Curitiba, it is recommended the use of roofing materials that minimize heat gains in summer while avoiding heat losses in winter. The use of insulating materials such as radiant barriers, formed, for example, by juxtaposed aluminum sheets, can bring thermal advantages in such situations. A low-cost option to perform the function of a radiant barrier is based on the use of open Tetra Pak® packages, which have one of their aluminized sides exposed. The aim of the study was to evaluate the thermal performance of the following insulation sheets: 50mm Styropor® , double-sided foil and Tetra Pak® sheets for fiberglass enclosures, in conditions of natural exposure to weather elements and in transitional periods in fall-winter and spring-summer. The methodological procedures in the autumn-winter transitional period comprised the comparison of air and surface temperatures of the roof elements. In spring-summer, air and surface temperatures of roof and walls (east- and south-facing) were compared and the measurement of the heat flow, to calculate the thermal resistance. The use of Tetra Pak® sheets with an upward-facing aluminized side or with double-sided coating (two glued, open Tetra Pak® packages - aluminized faces exposed) showed a reduction in the maximum surface temperature of 9.8°C and 9.3°C, respectively, and an increase in the minimum surface temperature of 2.7°C and 2.0°C, respectively. For the spring-summer transitional period, results for Tetra Pak® sheets were superior to those of Styropor® and double-sided foils.