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ALBATICI, Rossano; TONELLI, Arnaldo. On site evaluation of U-value of opaque building elements: a new methodology. [].
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Dados do autor na base InfoHab:
Número de Trabalhos: 1 (Nenhum com arquivo PDF disponível)
Citações: Nenhuma citação encontrada
Índice h: Indice h não calculado  
Co-autores: Nenhum co-autor encontrado

Resumo

Concerning the evaluation of the energy performance of a building, in order to arrange an accurate energy analysis, it is necessary to collect the greatest number of information about the building and, most of all, its envelope, with particular attention to the accuracy of the technical parameters of the building materials and components used. Nevertheless, it should be important to refer to the as-built situation that is often different from the designed one, either because of changes occurred on site during the construction or because of the different behaviour of the building elements in real situation linked to a particular microclimate. The paper deals with a research activity carried out at the Laboratory of Building Design of the University of Trento (Italy) concerning the critical analysis of two methods used for the acquisition of the thermal transmittance values of opaque building envelope elements: the heat flowmeter measurement method and the thermovision technique. While the first method is already quite consolidated and described by the International Standard ISO 9869:1994, the latter is still considered a qualitative method and its potential has not been adequately explored yet. The aim of the research is to propose a scientific protocol for the on site energy investigation through the termovision techniques in order to acquire quantitative data of the real thermal transmittance of the building envelope in a quasi-steady state condition. An application on a case study will be presented and discussed.

Abstract

Concerning the evaluation of the energy performance of a building, in order to arrange an accurate energy analysis, it is necessary to collect the greatest number of information about the building and, most of all, its envelope, with particular attention to the accuracy of the technical parameters of the building materials and components used. Nevertheless, it should be important to refer to the as-built situation that is often different from the designed one, either because of changes occurred on site during the construction or because of the different behaviour of the building elements in real situation linked to a particular microclimate. The paper deals with a research activity carried out at the Laboratory of Building Design of the University of Trento (Italy) concerning the critical analysis of two methods used for the acquisition of the thermal transmittance values of opaque building envelope elements: the heat flowmeter measurement method and the thermovision technique. While the first method is already quite consolidated and described by the International Standard ISO 9869:1994, the latter is still considered a qualitative method and its potential has not been adequately explored yet. The aim of the research is to propose a scientific protocol for the on site energy investigation through the termovision techniques in order to acquire quantitative data of the real thermal transmittance of the building envelope in a quasi-steady state condition. An application on a case study will be presented and discussed.
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