Effect of exfiltration on the hygrothermal behaviour of a residential wall assembly

Tuomo Ojanen, Kumar Kumaran

Research output: Contribution to journalArticleScientificpeer-review

8 Citations (Scopus)

Abstract

The hygrothermal behaviour of timber frame wall is analysed using a steady-state calculation method and a two-dimensional heat, air, and moisture transport computer model. The conditions associated with exfiltration of warm and humid indoor air are examined. The physical quantities investigated included the amount of moisture accumulated in the wall cavity during the heating season and the heat loss across the wall. Several interesting correlations between moisture accumula tion in a cavity and parameters such as leakage rate, vapour permeance characteristics of the exterior boundary, additional thermal resistance offered by an exterior sheath ing, and indoor humidity level emerge. These correlations show the advantage of us ing the analytical methods in deriving design guidelines for building components. The results from the analysis are used to identify and quantify various parameters that govern the performance of air barrier systems.
Original languageEnglish
Pages (from-to)215-227
Number of pages13
JournalJournal of Thermal Insulation and Building Envelopes
Volume19
Issue number3
DOIs
Publication statusPublished - 1996
MoE publication typeA1 Journal article-refereed

Fingerprint

Moisture
Air
Leakage (fluid)
Timber
Heat losses
Heat resistance
Atmospheric humidity
Vapors
Heating
Hot Temperature

Cite this

@article{a9df86a60f9d44c1954edbb09c03d69d,
title = "Effect of exfiltration on the hygrothermal behaviour of a residential wall assembly",
abstract = "The hygrothermal behaviour of timber frame wall is analysed using a steady-state calculation method and a two-dimensional heat, air, and moisture transport computer model. The conditions associated with exfiltration of warm and humid indoor air are examined. The physical quantities investigated included the amount of moisture accumulated in the wall cavity during the heating season and the heat loss across the wall. Several interesting correlations between moisture accumula tion in a cavity and parameters such as leakage rate, vapour permeance characteristics of the exterior boundary, additional thermal resistance offered by an exterior sheath ing, and indoor humidity level emerge. These correlations show the advantage of us ing the analytical methods in deriving design guidelines for building components. The results from the analysis are used to identify and quantify various parameters that govern the performance of air barrier systems.",
author = "Tuomo Ojanen and Kumar Kumaran",
year = "1996",
doi = "10.1177/109719639601900303",
language = "English",
volume = "19",
pages = "215--227",
journal = "Journal of Building Physics",
issn = "1744-2591",
publisher = "SAGE Publications",
number = "3",

}

Effect of exfiltration on the hygrothermal behaviour of a residential wall assembly. / Ojanen, Tuomo; Kumaran, Kumar.

In: Journal of Thermal Insulation and Building Envelopes, Vol. 19, No. 3, 1996, p. 215-227.

Research output: Contribution to journalArticleScientificpeer-review

TY - JOUR

T1 - Effect of exfiltration on the hygrothermal behaviour of a residential wall assembly

AU - Ojanen, Tuomo

AU - Kumaran, Kumar

PY - 1996

Y1 - 1996

N2 - The hygrothermal behaviour of timber frame wall is analysed using a steady-state calculation method and a two-dimensional heat, air, and moisture transport computer model. The conditions associated with exfiltration of warm and humid indoor air are examined. The physical quantities investigated included the amount of moisture accumulated in the wall cavity during the heating season and the heat loss across the wall. Several interesting correlations between moisture accumula tion in a cavity and parameters such as leakage rate, vapour permeance characteristics of the exterior boundary, additional thermal resistance offered by an exterior sheath ing, and indoor humidity level emerge. These correlations show the advantage of us ing the analytical methods in deriving design guidelines for building components. The results from the analysis are used to identify and quantify various parameters that govern the performance of air barrier systems.

AB - The hygrothermal behaviour of timber frame wall is analysed using a steady-state calculation method and a two-dimensional heat, air, and moisture transport computer model. The conditions associated with exfiltration of warm and humid indoor air are examined. The physical quantities investigated included the amount of moisture accumulated in the wall cavity during the heating season and the heat loss across the wall. Several interesting correlations between moisture accumula tion in a cavity and parameters such as leakage rate, vapour permeance characteristics of the exterior boundary, additional thermal resistance offered by an exterior sheath ing, and indoor humidity level emerge. These correlations show the advantage of us ing the analytical methods in deriving design guidelines for building components. The results from the analysis are used to identify and quantify various parameters that govern the performance of air barrier systems.

U2 - 10.1177/109719639601900303

DO - 10.1177/109719639601900303

M3 - Article

VL - 19

SP - 215

EP - 227

JO - Journal of Building Physics

JF - Journal of Building Physics

SN - 1744-2591

IS - 3

ER -