Vous avez des questions? Nous pouvons vous aider. Pour communiquer directement avec un auteur, consultez la
première page de la revue dans laquelle son article a été publié afin de trouver ses coordonnées. Si vous n’arrivez pas à les repérer, communiquez avec nous à PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca.
Questions? Contact the NRC Publications Archive team at
PublicationsArchive-ArchivesPublications@nrc-cnrc.gc.ca. If you wish to email the authors directly, please see the first page of the publication for their contact information.
https://publications-cnrc.canada.ca/fra/droits
L’accès à ce site Web et l’utilisation de son contenu sont assujettis aux conditions présentées dans le site LISEZ CES CONDITIONS ATTENTIVEMENT AVANT D’UTILISER CE SITE WEB.
READ THESE TERMS AND CONDITIONS CAREFULLY BEFORE USING THIS WEBSITE.
https://nrc-publications.canada.ca/eng/copyright
NRC Publications Archive Record / Notice des Archives des publications du CNRC :
https://nrc-publications.canada.ca/eng/view/object/?id=fc8f2f41-9c5d-4805-b040-0ef4991be628 https://publications-cnrc.canada.ca/fra/voir/objet/?id=fc8f2f41-9c5d-4805-b040-0ef4991be628
NRC Publications Archive
Archives des publications du CNRC
Access and use of this website and the material on it are subject to the Terms and Conditions set forth at
A numerical modeling tool to simulate heat, air and moisture transfer through building envelopes
http://irc.nrc-cnrc.gc.ca A N u m e r i c a l m o d e l i n g t o o l t o s i m u l a t e h e a t , a i r a n d m o i s t u r e t r a n s f e r t h r o u g h b u i l d i n g e n v e l o p e s I R C - O R A L - 8 5 2 C o r n i c k , S . F e b r u a r y 1 3 , 2 0 0 8
The material in this document is covered by the provisions of the Copyright Act, by Canadian laws, policies, regulations and international agreements. Such provisions serve to identify the information source and, in specific instances, to prohibit reproduction of materials without written permission. For more information visit http://laws.justice.gc.ca/en/showtdm/cs/C-42
Les renseignements dans ce document sont protégés par la Loi sur le droit d'auteur, par les lois, les politiques et les règlements du Canada et des accords internationaux. Ces dispositions permettent d'identifier la source de l'information et, dans certains cas, d'interdire la copie de documents sans permission écrite. Pour obtenir de plus amples renseignements : http://lois.justice.gc.ca/fr/showtdm/cs/C-42
A Numerical Modeling Tool to Simulate Heat,
Air and Moisture Transfer through Building
Envelopes
Steve Cornick
Heat and Moisture Performance of Envelopes
“Computational Tools and Technologies for Construction Practitioners”
Outline
hygIRC: A Design and Decision Support Tool
What does it do?
What about the results? What is it good for?
The future
Can I get a copy? Concluding Remarks
What does it do?
hygIRC
A state-of-the-art HAM simulation tool
HAM – Heat, Air, Moisture
Sometimes called a Hygrothermal Model
hygro (Gr. Moisture) + therm
ē
(Gr. Heat)
1D is a one-dimensional commercial version of 2D
research tool – stand alone
What does it do?
• The models are of various complexities, ranging from
simple, to 1-D to 2-D and 3-D
• The user-friendly tools can be used by building designers,
consultants, producers of building materials and
researchers
• The input are very important, they can make one HAM-tool
better than the others. Some of the HAM-Tools cannot
generate weather files or new materials or indoor and
initial conditions, and so on
What does it do?
• Moisture balance:
• Heat balance:
• Air mass balance:
• Momentum balance (Darcy equation):
υ
υ
, WV, P
, WV, P
T
T
Exterior Conditions
Idealized Wall
Interior Conditions
Moisture transfer
Moisture transfer
Moisture transfer
Heat transfer
Heat transfer
Heat transfer
Cl
ad
di
ng
Sh
ea
thin
g
m
em
br
an
e
Sh
ea
thi
ng
In
su
la
tio
n
Va
pou
r
bar
rie
r
Pa
in
te
d
dr
yw
al
l
What does it do?
Air movement
Air movement
What does it do?
HAM-Tool Solver Output tools Climate database Interior conditions Building envelope design Material properties databaseWhat about the results?
MODELING
MODELING
(i.e. hygIRC 1D & 2D)
Laboratory
Laboratory
measurements
measurements
Field measurements
Field measurements
Benchmarking
Benchmarking
Analytical Analytical InterInter--model comparisonsmodel comparisons
Did we code the physics right?
Did we get the physics right?
Does the model do a good job of simulating the real world?
What about the results?
Field exposure facility
Environmental envelope
exposure facility
International benchmarking
exercises
http://irc.nrc-cnrc.gc.ca/bes/facilities/fieldex_e.html http://irc.nrc-cnrc.gc.ca/bes/facilities/eeef_e.html http://irc.nrc-cnrc.gc.ca/bes/software/hygIRC/hamstad_e.htmlWhat is good for?
Investigating the transfer of heat, and moisture through materials
Assessing the hygrothermal performance of different wall assemblies
Improving the understanding of the response of wall and window assemblies exposed to naturally occurring climate loads as well as to indoor environment loads of T, RH and P defined by occupancy and HVAC systems
Researching the interaction between the building envelope and the indoor environment
Complements controlled laboratory test and field measurements
What is it good for?
1-D hygIRC can be used for
parametric analysis: changing weather (locations), materials, for example what if scenarios: such as stucco vs. brick
Best handled by 2-D hygIRC air leakage
water leaks gravity effects
Not limited to modeling walls and roofs Boundary conditions are known Material properties are known
What is it good for?
Outputs
Time series of temperature, moisture content, energy and mass fluxes
Various integrated measures Preliminary damage models
Output piped to damage or deterioration models
Mould, Rot, Corrosion
PERD-91 GIS-MMS – kernel embedded
0 0.5 1 1.5 2 2.5 3 3.5 4 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 Time, h M ould Inde x , -Ottawa 1978 Tipping Ottawa 1978 EnvCan Ottawa 1978 AdjL Ottawa 1978 AdjLMH Ottawa 1978 Random
What is it good for?
Example: Mould growth
hygIRC output piped to a mould growth model
0 0.5 1 1.5 2 2.5 3 3.5 4 0 1000 2000 3000 4000 5000 6000 7000 8000 9000 Time, h Mould Index, -Ottawa 1978 Tipping Ottawa 1978 EnvCan Ottawa 1978 AdjL Ottawa 1978 AdjLMH Ottawa 1978 Random
The future
hygIRC 1D stand alone
Continued development
Expand materials and climate databases Incorporate design standards such as ASHRAE Std. 160
Improve indoor T and RH models
Finer control of wind and wind-driven rain Continue to improve the interface
hygIRC 1D kernel
Embed the kernel in decision support tools
PERD 91 GIS-based maintenance management system
The future
hygIRC 2D
Develop the 1D interface for a 2D release
Fritz Lang. Metropolis. 1926.
Film Stills Archive,
The Museum of Modern Art, New York .
The future
Where can I get a copy?
Contact us
Steve Cornick, steve.cornick@nrc.ca, 613.990.0460
Wahid Maref, Wahid.Maref@nrc-cnrc.gc.ca, 613.993.5709
Khaled Abdulghani, Khaled.Abdulghani@nrc-cnrc.gc.ca 613.998.6807 Or
hygIRC1-D@nrc-cnrc.gc.ca
Or
Client services
Institute for Research in Construction National Research Council of Canada 1200 Montreal Road
Ottawa, ON K1A 0R6 Tel.: (613) 993-2607 Fax: (613) 952-7673
Where can I get a copy?
Website
Concluding remarks
The HAM tools are needed for hygrothermal performance
of BE
hygIRC 1D
helps designers, architects, and engineers for
making-decisions.
HAM-Tool user has to know:
9 the physics first of his system,
9 the phenomena involved,
9 the structure of the envelope,
9 boundary conditions and
9 the hygrothermal properties of the different products of the envelope.
hygIRC 1D
What is it?
9User friendly 1D version state-of-the-art HAM model.
9Calculate heat and moisture through BE simulating the response of each element to changing environmental conditions on either side of the envelope on hourly basis providing T, RH distributions within the wall assembly & changes over time
Who needs it?
9Anybody, who is interested in investigating the transfer of heat, and moisture
through common construction materials (Engineers, Architects, Building Scientists, Contractors, other Professionals, and students.
Why use it?
9User-friendly, fast, reliable, powerful and not expensive
9Framework was built to facilitate case studies allowing the user to readily conduct parametric studies.
9Use both systems: SI and IP
How can I use it?
9See following presentations
Thanks to…
Development team
Khaled Abdulghani
Steve
Cornick
Wahid
Maref
David van
R
eenen
Tom Thomson
