Investigation of the thermal resistance of timber attic spaces with reflective foil and bulk insulation, heat flow up

被引：28

作者：

Belusko, M. ^{[1
]}

Bruno, F. ^{[1
]}

Saman, W. ^{[1
]}

机构：

[1] Univ S Australia, Inst Sustainable Syst & Technol, Adelaide, SA 5095, Australia

来源：

APPLIED ENERGY | 2011年 / 88卷 / 01期

基金：

澳大利亚研究理事会;

关键词：

Heat transfer; Buildings; Thermal resistance; Timber roof; Bulk insulation; Reflective foil; PERFORMANCE;

D O I：

10.1016/j.apenergy.2010.07.017

中图分类号：

TE [石油、天然气工业]; TK [能源与动力工程];

学科分类号：

0807 ; 0820 ;

摘要：

An experimental investigation was undertaken in which the thermal resistance for the heat flow through a typical timber framed pitched roofing system was measured under outdoor conditions for heat flow up. The measured thermal resistance of low resistance systems such as an uninsulated attic space and a reflective attic space compared well with published data. However, with higher thermal resistance systems containing bulk insulation within the timber frame, the measured result for a typical installation was as low as 50% of the thermal resistance determined considering two dimensional thermal bridging using the parallel path method. This result was attributed to three dimensional heat flow and insulation installation defects, resulting from the design and construction method used. Translating these results to a typical house with a 200 m(2) floor area, the overall thermal resistance of the roof was at least 23% lower than the overall calculated thermal resistance including two dimensional thermal bridging. When a continuous layer of bulk insulation was applied to the roofing system, the measured values were in agreement with calculated resistances representing a more reliable solution. (C) 2010 Elsevier Ltd. All rights reserved.

引用

页码：127 / 137

页数：11

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