Integrated Methodology for Evaluation of Energy Performance of Building Enclosures – Part II: Examples of Application to Residential Walls
2008 (English)In: Journal of Building Physics, ISSN 1744-2591, Vol. 32, no 1, 49-65 p.Article in journal (Refereed) Published
It is often forgotten that the building sector consumes more energy than the transportation sector. To meet expectations and needs of our society, onemust seek significant improvements in the efficient use of energy for this purpose. In many instances our normal approach based on conventional testing methods isnot comprehensive enough. For instance, the thermal performance of a wall is defined by tests performed on dry materials, without considering the air andmoisture movements. The energy performance of materials and building assemblies is affected by moisture and air flows. The authors believe that a more precise meansof evaluation of the thermal performance of assemblies must be used to guide us in developing construction practices that lead to better performance. This shouldinclude consideration of air and moisture transfer under field conditions.The previous part of this study describes the limitations of conventional thermal resistance testing using calibrated hot boxes and explains that the effect of climate onthermal performance must also involve use of computer models that are capable of simultaneous calculations of heat, air, and moisture (HAM) transfer.In this study, the integrated testing and modeling methodology proposed is applied to a few selected residential walls to highlight the magnitude of air floweffects compared with steady-state thermal resistance without air flows. Effectively, to characterize energy performance of the building enclosure, one must use an integratedmethodology that uses both testing and modeling. The study represents a first step in this direction.
Place, publisher, year, edition, pages
Los Angeles, London, New Delhi and Singapore: Sage Publications, 2008. Vol. 32, no 1, 49-65 p.
energy efficiency, heat losses and gains, low energy housing, thermal performance, heat, air and moisture transfer.
IdentifiersURN: urn:nbn:se:kth:diva-65782DOI: 10.1177/1744259108093317ISI: 000257641000005OAI: oai:DiVA.org:kth-65782DiVA: diva2:483703
QC 201201262012-01-252012-01-252012-02-28Bibliographically approved