As simultaneous heat and mass transfer between building envelopes and indoor air is
complicated and expensive to measure in laboratory and field experiments, a
numerical model is important in understanding and extrapolating experimental
results. In this paper a numerical model that solves simultaneous heat and mass
transfer between building envelopes and indoor air is verified using the field
measurements presented in Part I of this paper. The verification results show that
the model is able to predict the transfer of water vapor, CO2, and
SF6 between the building envelope and air. The model is then applied to
investigate the humidity, comfort, and air quality in a bedroom of a wooden building
located in four European countries (Finland, Belgium, Germany, and Italy). The
numerical results show that moisture transfer between indoor air and the hygroscopic
structure significantly reduces the peak indoor humidity (up to 35% RH), percent
dissatisfied with warm respiratory comfort (up to 10%) and the percent dissatisfied
with indoor air quality (up to 25%).
ANSI/ASHRAE
Standard 55-1992. Thermal Environmental Conditions for Human
Occupancy,
Atlanta
.
2.
ASHRAE
(2001). Fundamentals Handbook,
ASHRAE, Atlanta
.
3.
ASTM
(1994). In:
Trechsel, H.R.
(ed.), Moisture Control in Buildings,
Philadelphia, ASTM
.
4.
Bornehag, C.-G.
,
Blomquist, G.
,
Gyntelberg, F.
,
Jarvholm, B.
,
Malmberg, P.
,
Nordvall, L.
,
Nielsen, A.
,
Pershagen, G.
and
Sundell, J.
(2001).
Dampness in Buildings and Health
, Indoor Air, 11:
72–86
.
5.
Fang, L.
,
Clausen, G.
and
Fanger, P.O.
(1998).
Impact of Temperature and Humidity on the Perception of Indoor Air Quality
, Indoor Air, 8:
80–90
.
6.
Haghighat, F.
and
Bellis, L.D.
(1998).
Material Emission Rates: Literature Review, and the Impact of Indoor air
Temperature and Relative Humidity
, Building and Environment, 33(5):
261–277
.
7.
Hens, H. and Janssens, A. (1993). Inquiry on HAMCAT CODES, International
Energy Agency, Heat, Air and Moisture Transfer in Insulated Envelope Parts, Report
Annex 24, Task 1, Modeling.
IEA
(1991).
Condensation and Energy
, ECBCS Annex 14, Volume 1 Sourcebook.
10.
IEA
(1996). Modelling, Final Report, IEA ECBCS
Annex 24.
11.
Karagiozis, A.
,
Salonvaara, M.
and
Kumaran, K.
(1994). LATENITE Hygrothermal Material Property
Database, IEA Annex 24 Report T3-CA-94/03,
Trondheim, Norway
.
12.
Kerestecioglu, A.A.
,
Swami, M.V.
and
Kamel, A.A.
(1990).
Theoretical and Computational Investigation of Simultaneous Heat and
Moisture Transfer in Buildings: ‘‘Effective Penetration Depth’’Theory, ASHRAE Trans., 96(1):
447–454
.
13.
Kirchner, S.
,
Badey, J.R.
,
Knudsen, H.
,
Meininghaus, R.
,
Quenard, D.
,
Saarela, K.
,
Sallée, H.
and
Saarinen, A.
(1999).
Evaluation of VOCs Sorption/Diffusion Capacities of Indoor Surface
Materials: Proposal of New Test Procedures, In: Proceedings of the 8th
International Conference on Indoor Air Quality &Climate, Indoor Air99, pp.
430–435
, Edinburgh.
14.
Kumaran, M.K. (2002). A Thermal and Moisture Transport Database for Common
Building and Insulating Materials, Final report of ASHRAW Research Project, RP1018,
229 pages.
15.
Künzel, H. (1979). Repräsentativumfrage über Das
Heizen und Lüften in Wohnungen, IBP Mitteilung 7, Nr. 47.
16.
Künzel, H.M.
,
Zirkelbach, D.
and
Sedlbauer, K.
(2003).
Predicting Indoor Temperature and Humidity Conditions Including
Hygrothermal Interactions with the Building Envelope
, In: Proceedings of 1st International Conference on Sustainable
Energy and Green Architecture, Building Scientific Research Center
(BSRC), King Mongkut’s University Thonburi, Bangkok.
17.
Mukhopadhyaya, P.
,
Kumaran, K.
,
Tariku, F.
and
van Reenen, D.
(2003). Final Report from Task 7 of the MEWS Project,
Long-Term performance: Predict the Moisture Management Performance of Wall
Systems as a Function of Climate, Material Properties, etc.
Through Mathematical Modeling, IRC-RR-132,
Ottawa, Canada
, http://irc.nrc-cnrc.gc.ca/fulltext/rr132/rr132.pdf.
18.
Padfield, T. (1998a). The Role of Absorbent Building Materials in Moderating
Changes of Relative Humidity, PhD Thesis, in the Department of Structural
Engineering and Materials, The Technical University of Denmark, Denmark, http://www.natmus.dk/cons/tp/phd/phd-indx.htm.
19.
Padfield, T. (1998b). The Role of Absorbent Building Materials in Moderating
Changes of Relative Humidity, PhD Thesis, in the Department of Structural
Engineering and Materials, Technical University of Denmark.
20.
Reid, R.C.
,
Prausnitz, J.J.
and
Sherwood, T.K.
(1958). The Properties of Gases and Liquids, 3rd
edn, p. 554-554,
McGraw-Hill Book Company, New York
.
21.
Rengarajan, K.
,
Shirey, D.B.III
and
Raustad, R.A.
(1996).
Cost-Effective HVAC Technologies to Meet ASHRAE Standard 62–1989
in Hot and Humid Climates
, ASHRAE Trans., 102(1):
166–182
.
22.
Rode, C.
,
Grau, K.
and
Mitamura, T.
(2001).
Hygrothermal Conditions in the Envelope and Indoor Air of Buildings
, In: Proceedings (CD) of Performance of Exterior Envelopes of
Whole Buildings VIII: Integration of Building Envelopes,
Clearwater Beach, Florida, ASHRAE.
23.
Salonvaara, M.H.
(1998a).
Prediction of Hygrothermal Performance of Building Envelope Parts Coupled
with Indoor Climate
, ASHRAE Trans., 104(2):
908–918
.
24.
Salonvaara, M.H.
(1998b).
Prediction of Hygrothermal Performance of Building Envelope Parts Coupled
with Indoor Climate
, ASHRAE Trans., 104(2):
908–918
.
25.
Salonvaara, M.
and
Karagiozis, A.
(1994).
Moisture Transport in Building Envelopes Using an Approximate Factorization
Solution Method
, In:
Gottlieb, J.
and
Ethier, C.
(eds), In: Proceedings of the Second Annual Conference of the CFD
Society of Canada, pp.
317–326
, Toronto, Canada.
26.
Sanders, C. (1996). Environmental Conditions, Final Report Volume 2, IEA
Annex 24, Leuven.
27.
Sensharma, N.P.
,
Woods, J.E.
and
Goodwin, A.K.
(1998).
Relationships Between the Indoor Environment and Productivity: A Literature Review
, ASHRAE Trans., 104(1A):
686–701
.
28.
Seppänen, O.
,
Fisk, W.
and
Mendell, M.
(1999).
Association of Ventilation Rates and CO2-concentrations with Health and
Other Responses in Commercial and Institutional Buildings
, Indoor Air, 9(4):
226–252
.
29.
Simonson, C.J.
(2000). Moisture, Thermal and Ventilation Performance of
Tapanila Ecological House, Espoo, VTT Research Notes; 2069, 141 pp
+ App. 5 pp, http://www.inf.vtt.fi/pdf/tiedotteet/2000/T2069.pdf.
30.
Simonson, C.J.
,
Salonvaara, M.
and
Ojanen, T.
(2001). Improving Indoor Climate and Comfort with Wooden
Structures, Espoo,
VTT Publications
, 431-431, 192-192 pp
+ App. 91 pp.
31.
Simonson, C.J.Salonvaara, M.
And
Ojanen, T.
(2002).
The Effect of Structures on Indoor Humidity – Possibility to
Improve Comfort and Perceived Air Quality
, Indoor Air, 12:
1–9
.
32.
Simonson, C.J.
,
Salonvaara, M.
and
Ojanen, T.
(2004).
Moderating Indoor Conditions with Hygroscopic Building Materials and
Outdoor Ventilation
, ASHRAE Trans., 110(2).
33.
Simonson, C.J.
,
Ojanen, T.
and
Salonvaara, M.
(2003).
Moisture Performance of a Vapor Permeable Building Envelope in a Cold Climate
, Submitted to the Journal of Thermal Envelope and Building
Science, August 2003.
34.
Simonson, C.J.
,
Salonvaara, M.
and
Ojanen, T.
(2004).
Heat and Mass Transfer Between Indoor Air and a Permeable and Hygroscopic
Building Envelope: Part I – Field Measurements
, Journal of Thermal Envelope and Building Science,
28(1):
63–101
.
35.
TenWolde, A.
(1987).
A Mathematical Model for Indoor Humidity in Homes During Winter
, In: Proceedings of the Symposium on Air Infiltration,
Ventilation and Moisture Transfer, Fort Worth, Texas, Building
Envelope Coordinating Council, Washington DC.
36.
TenWolde, A.
(1994).
Ventilation, Humidity, and Condensation in Manufactured Houses During Winter
, ASHRAE Trans., 100(1):
103–115
.
37.
Toftum, J.
,
Jorgensen, A.S.
and
Fanger, P.O.
(1998).
Upper Limits of Air Humidity for Preventing Warm Respiratory Discomfort
, Energy and Buildings, 28:
15–23
.
38.
Virtanen, M.J.
,
Künzel, H.M.
and
Simonson, C.J.
(2000). WS10 The Effect of Wood Based Materials on Indoor
Air Quality and Climate, In:
Seppänen, O.
,
Tuomainen, M.
and
Säteri, J.
(eds), Healthy Buildings 2000 Workshop Summaries, pp. 5560, Espoo,
Finland, Finnish Society of Indoor Air Quality and Climate, http://www.hb2000.org/workshop10.html.
39.
Wargocki, P.
,
Wyon, D.P.
,
Sundell, J.
,
Clausen, G.
and
Fanger, P.O.
(2000).
The Effects of Outdoor Air Supply Rate in an Office on Perceived Air
Quality, Sick Building Syndrome (SBS) Symptoms and Productivity
, Indoor Air, 10:
222–236
.
40.
Zhang, Y.
and
Haghighat, F.
(1997).
The Impact of Surface Air Movement on Material Emissions
, Building and Environment, 32:
551–556
.
