Thermal Performance Improvement of Double-Pane Lightweight Steel Framed Walls Using Thermal Break Strips and Reflective Foils

The reduction of unwanted heat losses across the buildings’ envelope is very relevant to increase energy efficiency and achieve the decarbonization goals for the building stock. Two major heat transfer mechanisms across the building envelope are conduction and radiation, being this last one very imp...

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Autores principales:	Paulo Santos, Telmo Ribeiro
Formato:	article
Lenguaje:	EN
Publicado:	MDPI AG 2021
Materias:	thermal performance experimental assessment double-pane lightweight steel frame (LSF) partition walls aerogel thermal break strips Technology T
Acceso en línea:	https://doaj.org/article/a3e41a2a443342c68d7fc860153b029b
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spelling	oai:doaj.org-article:a3e41a2a443342c68d7fc860153b029b2021-11-11T15:45:33ZThermal Performance Improvement of Double-Pane Lightweight Steel Framed Walls Using Thermal Break Strips and Reflective Foils10.3390/en142169271996-1073https://doaj.org/article/a3e41a2a443342c68d7fc860153b029b2021-10-01T00:00:00Zhttps://www.mdpi.com/1996-1073/14/21/6927https://doaj.org/toc/1996-1073The reduction of unwanted heat losses across the buildings’ envelope is very relevant to increase energy efficiency and achieve the decarbonization goals for the building stock. Two major heat transfer mechanisms across the building envelope are conduction and radiation, being this last one very important whenever there is an air cavity. In this work, the use of aerogel thermal break (TB) strips and aluminium reflective (AR) foils are experimentally assessed to evaluate the thermal performance improvement of double-pane lightweight steel-framed (LSF) walls. The face-to-face thermal resistances were measured under laboratory-controlled conditions for sixteen LSF wall configurations. The reliability of the measurements was double-checked making use of a homogeneous XPS single panel, as well as several non-homogeneous double-pane LSF walls. The measurements allowed us to conclude that the effectiveness of the AR foil is greater than the aerogel TB strips. In fact, using an AR foil inside the air cavity of double-pane LSF walls is much more effective than using aerogel TB strips along the steel flange, since only one AR foil (inner or outer) provides a similar thermal resistance increase than two aerogel TB strips, i.e., around +0.47 m<sup>2</sup>∙K/W (+19%). However, the use of two AR foils, instead of a single one, is not effective, since the relative thermal resistance increase is only about +0.04 m<sup>2</sup>∙K/W (+2%).Paulo SantosTelmo RibeiroMDPI AGarticlethermal performanceexperimental assessmentdouble-panelightweight steel frame (LSF)partition wallsaerogel thermal break stripsTechnologyTENEnergies, Vol 14, Iss 6927, p 6927 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	thermal performance experimental assessment double-pane lightweight steel frame (LSF) partition walls aerogel thermal break strips Technology T
spellingShingle	thermal performance experimental assessment double-pane lightweight steel frame (LSF) partition walls aerogel thermal break strips Technology T Paulo Santos Telmo Ribeiro Thermal Performance Improvement of Double-Pane Lightweight Steel Framed Walls Using Thermal Break Strips and Reflective Foils
description	The reduction of unwanted heat losses across the buildings’ envelope is very relevant to increase energy efficiency and achieve the decarbonization goals for the building stock. Two major heat transfer mechanisms across the building envelope are conduction and radiation, being this last one very important whenever there is an air cavity. In this work, the use of aerogel thermal break (TB) strips and aluminium reflective (AR) foils are experimentally assessed to evaluate the thermal performance improvement of double-pane lightweight steel-framed (LSF) walls. The face-to-face thermal resistances were measured under laboratory-controlled conditions for sixteen LSF wall configurations. The reliability of the measurements was double-checked making use of a homogeneous XPS single panel, as well as several non-homogeneous double-pane LSF walls. The measurements allowed us to conclude that the effectiveness of the AR foil is greater than the aerogel TB strips. In fact, using an AR foil inside the air cavity of double-pane LSF walls is much more effective than using aerogel TB strips along the steel flange, since only one AR foil (inner or outer) provides a similar thermal resistance increase than two aerogel TB strips, i.e., around +0.47 m<sup>2</sup>∙K/W (+19%). However, the use of two AR foils, instead of a single one, is not effective, since the relative thermal resistance increase is only about +0.04 m<sup>2</sup>∙K/W (+2%).
format	article
author	Paulo Santos Telmo Ribeiro
author_facet	Paulo Santos Telmo Ribeiro
author_sort	Paulo Santos
title	Thermal Performance Improvement of Double-Pane Lightweight Steel Framed Walls Using Thermal Break Strips and Reflective Foils
title_short	Thermal Performance Improvement of Double-Pane Lightweight Steel Framed Walls Using Thermal Break Strips and Reflective Foils
title_full	Thermal Performance Improvement of Double-Pane Lightweight Steel Framed Walls Using Thermal Break Strips and Reflective Foils
title_fullStr	Thermal Performance Improvement of Double-Pane Lightweight Steel Framed Walls Using Thermal Break Strips and Reflective Foils
title_full_unstemmed	Thermal Performance Improvement of Double-Pane Lightweight Steel Framed Walls Using Thermal Break Strips and Reflective Foils
title_sort	thermal performance improvement of double-pane lightweight steel framed walls using thermal break strips and reflective foils
publisher	MDPI AG
publishDate	2021
url	https://doaj.org/article/a3e41a2a443342c68d7fc860153b029b
work_keys_str_mv	AT paulosantos thermalperformanceimprovementofdoublepanelightweightsteelframedwallsusingthermalbreakstripsandreflectivefoils AT telmoribeiro thermalperformanceimprovementofdoublepanelightweightsteelframedwallsusingthermalbreakstripsandreflectivefoils
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Thermal Performance Improvement of Double-Pane Lightweight Steel Framed Walls Using Thermal Break Strips and Reflective Foils

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