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ASTM Selected Technical Papers
Thermal Insulation, Materials, and Systems for Energy Conservation in the '80s
By
FA Govan
FA Govan
1
Vice President of Professional Services
,
Ziel-Blossom & Associates, Inc.
,
Cincinnati, Ohio
;
conference chairman and editor
Search for other works by this author on:
DM Greason
DM Greason
2
Research Leader
,
Foam Products TS&D, Dow Chemical USA
,
Granville, Ohio
;
conference vice chairman — Technical Program and editor
Search for other works by this author on:
JD McAllister
JD McAllister
3
Senior Mechanical Engineer
,
American Electric Power Service Corporation
,
New York, N.Y.
;
conference co-chairman and editor
Search for other works by this author on:
ISBN-10:
0-8031-0230-5
ISBN:
978-0-8031-0230-9
No. of Pages:
905
Publisher:
ASTM International
Publication date:
1983

In a previous study, the thermal conductivity of a high-density mineral fiberboard had been experimentally determined as a function of moisture content at ambient temperature in steady-state conditions, allowing moisture to be redistributed in the product. The results obtained were significantly different from those of other authors who had performed experiments with a uniform moisture distribution. The present work is an attempt to understand the reasons for these differences. A second series of tests has been performed on the same high-density product in an attempt to re-create the results of these authors. A method of measurement has been developed, and the results obtained for mean temperatures of 10 and 24°C are presented and discussed. Special attention is given to the heat transfer caused by vapor diffusion and to the latent heat component of thermal conductivity due to this diffusion. A simple model for predicting the thermal conductivity in the conditions of the tests is presented; fairly good correlation with the experimental results was obtained. Finally, all results are compared and discussed in order to see which can be considered representative of field conditions.

1.
Krischer
,
O.
and
Kröl
,
K.
, “
Technique du séchage, fascicule III
,”
Centre Technique des Industries Aérauliques et Thermiques
,
Lyon, France
.
2.
Luikov
,
A. V.
,
Heat and Mass Transfer in Capillary Porous Bodies
,
Pergamon Press
,
Elmsford, N.Y.
,
1966
, Chapter. 5.
3.
Jespersen
,
H. B.
,
Journal of the Institute of Heating and Ventilation Engineering
, Vol.
21
, No.
216
,
08
1953
, pp. 157-174.
4.
Joy
,
F. A.
in
Symposium on Thermal Conductivity Measurements and Applications of Thermal Insulations
, ASTM STP 217,
American Society for Testing and Materials
,
1957
, pp. 65-80.
5.
Knab
,
I.
,
Jenkins
,
R.
, and
Mathey
,
G.
, “
The Effect of Moisture on the Thermal Conductance of Roofing Systems
,” NBS Building Science Series 123,
National Bureau of Standards
,
Washington, D.C.
6.
Langlais
,
C.
,
Hyrien
,
M.
, and
Klarsfeld
,
S.
in
Moisture Migration in Buildings
, ASTM STP 779,
American Society for Testing and Materials
,
1982
, pp. 191-206.
7.
Bomberg
,
M.
and
Shirtliffe
,
C. J.
in
Thermal Transmission Measurements of Insulation
, ASTM STP 660,
American Society for Testing and Materials
,
1978
, pp. 211-233.
8.
Claesson
,
J.
and
Samuelson
,
I.
, “
Heat Losses by Moisture Flow Through Insulation Layers
,” SP Report 1978:10,
Statens Provningsanstalt
, Boras, Sweden.
9.
Bories
,
S.
,
Bacon
,
G.
, and
Monferran
,
D.
, “
Influence de la teneur en eau et de la température sur la conductivité thermique de milieux poreux non saturés
,”
tTeme Symposium International de L'A.I.R.H.
,
ENSEEIHT
,
Toulouse, France
.
10.
Bankvall
,
C. G.
in
Heat Transmission Measurements in Thermal Insulations
, ASTM STP 544,
American Society for Testing and Materials
,
1974
, pp. 34-48.
11.
Palosaari
,
S. M.
and
Cornish
,
A. R. H.
, “
An Approximate Method for the Prediction of the Effective Thermal Conductivity of Wetted Porous Materials
,”
Acta Polytechnica Scandinavica
, Chemistry Including Metallurgy Series 126,
1975
.
12.
Demars
,
Y.
and
Bück
,
Y.
in
Moisture Migration in Buildings
, ASTM STP 779,
American Society for Testing and Materials
,
1982
, pp. 110-120.
13.
Demars
,
Y.
and
Langlais
,
C.
, “
L'influence de l'humidité sur le transfert de chaleur dans les isolants. Fixation de l'humidité les isolants (isothermes d'adsorption)
,” Internal Report 154/78,
Isover Saint-Gobain
, Rantigny, France.
14.
Labeling and Advertising of Home Insulation
,”
Bureau of Consumer Protection, Federal Trade Commission
,
Washington, D.C.
,
07
1978
.
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