| Name: | Description: | Size: | Format: | |
|---|---|---|---|---|
| Documento principal | 3.3 MB | Adobe PDF |
Authors
Abstract(s)
Os edifícios são responsáveis pelo consumo de cerca de 37,2% da energia total consumida na
União Europeia. No entanto, este valor pode ser reduzido. Para esse efeito a Comissão
Europeia criou a Directiva 2002/91/CE sobre o Desempenho Energético dos Edifícios que
obrigou à implementação de um sistema de certificação energética.
Com a entrada em vigor em Portugal da nova regulamentação referente ao comportamento
térmico dos edifícios, nomeadamente o Regulamento das Características de Comportamento
Térmico dos Edifícios (RCCTE), obriga os projectistas e construtores a cumprir níveis de
exigência mais elevados. Entre outros parâmetros complementares a quantificar sobe
condições específicas estão os coeficientes de transmissão térmica superficiais e lineares
dos elementos da envolvente e a classe de inércia térmica do edifício.
O objectivo do presente trabalho consiste em avaliar o desempenho térmico de paredes em
edifícios com recurso a um equipamento multifunções Testo 435-2 e comparar os valores
medidos in situ do coeficiente de transmissão térmica de paredes exteriores de edifícios de
habitação com os valores teóricos calculados e analisar o comportamento destes.
Para tal, foram efectuados variados ensaios in situ para diferentes paredes da envolvente
exterior de edifícios onde são conhecidas as características, sendo assim possível fazer uma
caracterização pormenorizada das paredes e calcular o coeficiente global de transmissão
térmica teórico, com base no modelo de cálculo descrito no RCCTE. Foram testadas paredes
com a mesma solução construtiva para diferentes climas e diferentes orientações, de onde
se atesta a capacidade deste instrumento, obter resultados nas diferentes situações
testadas. Para a análise dos resultados foi elaborado um programa que ajuda na análise
preliminar dos resultados obtidos.
Após a análise dos resultados dos diferentes ensaios, concluiu-se que o equipamento de
medição utilizado depende de diferentes factores para obtenção de valores confiáveis. De
entre estes factores estão as condições meteorológicas que condicionam muito a sua
utilização.
Buildings are responsible for the consumption of 37.2% of total energy consumed in the European Union. However, this value can be reduced/improved. To this end the European Commission created the Directive 2002/91/EC on the Energy Performance of Buildings which forced the implementation of an European system of energy certification. With the entry of new mandatory regulations in Portugal for the thermal performance of buildings, including the regulation of the characteristics of thermal performance of buildings, RCCTE (Regulamento das Características de Comportamento Térmico dos Edifícios), it obliges the designers and builders to meet higher demand levels. Among other complementary parameters to quantify up specific conditions, are, the surface heat transfer coefficients, linear elements of the environment and the class of thermal inertia of the building. The purpose of this study is to evaluate the thermal performance of walls in buildings using a multifunctional device Testo 435-2 and compare the values measured in situ, heat transfer coefficient of exterior walls of residential buildings, with the theoretical values calculated and analyze the behavior of these buildings. To this end, various tests were carried out in situ for different walls surrounding the exterior of the buildings, where the characteristics are known, so it is possible to make a detailed characterization of the walls and calculate the overall heat transfer coefficient theoretical model, based on the calculation described in RCCTE. Walls were tested with the same constructive solution to different climates and different geographical orientations, confirming the ability of this instrument, results in different situations tested. For the analysis of the results it was developed a program that helps preliminary analysis of the results. After analyzing the results of different tests, it was concluded that the measuring equipment used depends on various factors to obtain reliable values. Among these factors are weather conditions that affect their very use.
Buildings are responsible for the consumption of 37.2% of total energy consumed in the European Union. However, this value can be reduced/improved. To this end the European Commission created the Directive 2002/91/EC on the Energy Performance of Buildings which forced the implementation of an European system of energy certification. With the entry of new mandatory regulations in Portugal for the thermal performance of buildings, including the regulation of the characteristics of thermal performance of buildings, RCCTE (Regulamento das Características de Comportamento Térmico dos Edifícios), it obliges the designers and builders to meet higher demand levels. Among other complementary parameters to quantify up specific conditions, are, the surface heat transfer coefficients, linear elements of the environment and the class of thermal inertia of the building. The purpose of this study is to evaluate the thermal performance of walls in buildings using a multifunctional device Testo 435-2 and compare the values measured in situ, heat transfer coefficient of exterior walls of residential buildings, with the theoretical values calculated and analyze the behavior of these buildings. To this end, various tests were carried out in situ for different walls surrounding the exterior of the buildings, where the characteristics are known, so it is possible to make a detailed characterization of the walls and calculate the overall heat transfer coefficient theoretical model, based on the calculation described in RCCTE. Walls were tested with the same constructive solution to different climates and different geographical orientations, confirming the ability of this instrument, results in different situations tested. For the analysis of the results it was developed a program that helps preliminary analysis of the results. After analyzing the results of different tests, it was concluded that the measuring equipment used depends on various factors to obtain reliable values. Among these factors are weather conditions that affect their very use.
Description
Keywords
Edifícios - Certificação energética Edifícios - Paredes - Transmissão térmica Edifícios - Comportamento térmico - Aspectos climáticos
Citation
Publisher
Universidade da Beira Interior