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Calculatingthermalbridges
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Moreno-Vacca Sebastian
Architect
Joint Head of Passivhaus Belgium P M P asblProfessor at university of architecture ULB-Horta[LaCambreHorta]
Manager own architects practice A 2 M scsprl
pmpULB-LaCambreHortaA 2 M
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Calculatingthermalbridges
and fabricmoisture
)(2ii
DU l L
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Definition thermal bridge
Regarding EN ISO 10211
« Is the part of the building envelope where the thermal resistance,
(uniform on the rest) is sensibly modified by:
- total or partly penetration of the envelope by a material which has a different
thermal conductivity
and/or
- the same material but different thicknesses
and/or
- a different structure between inside and outside».
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1/ New buildin g:
Case study
2/ renovation:
Case study
Limit thermal bridge calculation:
WUFI= dynamic temperature and moisture distribu tion , heat and mo isture fluxes
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> Construction
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Phpp certification passif
© pmp asbl
2007
phpp
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Mise en oeuvre, ébrasure = 0,00 W/(mK)
Mise en oeuvre, ébrasure = 0,00 W/(mK)
Mise en oeuvre, allège = 0,05 W/(mK) Mise en oeuvre, allège = 0,03 W/(mK)
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0, 3
0, 4
0, 5
0, 6
Sér ie1Sér ie2
Sér ie3
Sé i4
e = 0,028 W/mK
e = 0,540 W/mK
optimum ?
Uw
= 0,653 W/m²K U= 0,142 W/m²K
= 0,045 W/mK
Sources: © PMP
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e = 0,028 W/mK
54
cm
Sources: © PMP
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e
= 0,028 W/mK
Sources: © PMP
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e = 0,028 W/mK
Sources: © PMP
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e =
0,540
W/mK
54 cm
Sources: © PMP
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e = 0,540 W/mK
Sources: © PMP
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e =
0,540
W/mK
Sources: © PMP
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e = 0,012 W/mK
6
cm
54
cm
Sources: © PMP
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e
= 0,012 W/mK
Sources: © PMP
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e = 0,012 W/mK
Sources: © PMP
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0, 3
0, 4
0, 5
0, 6
Sér ie1Sér ie2
Sér ie3
Sé i4
e = 0,028 W/mK
Uw = 0,653 W/m²K U = 0,142 W/m²K
= 0,045 W/mK
Sources: © PMP
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e
=
0,008
W/mK
6
cm
25 cm
Sources: © PMP
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Pause:
theory…
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Free to choose the method:
Consequences ot the choice!
1/ Default value: accuracy 50%
2/ « Manual » calculation: accuracy 20%
3/ Thermalbridges catalog: accuracy 20%
4/ num. calculation method : accuracy 5%
Orange : linear thermal bridge EN 14683
Red : tb regarding catalog
Blue : tp regarding num. calculation method
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1/default valueEN ISO14683
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2/ Example swiss catalog
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Ψe : 0.97 W/mK
4/ Example num. calculation method: Eurokobra,
Therm, Heat, etc
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Test
Concrete (λ : 2.2)
MW 20 cm (λ : 0.45)
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ThermTherm EurokobraEurokobra
HeatHeat Archicube Archicube
KalibatKalibat
Antherm Antherm
BiscoBisco
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Ψe
By chance?
Stone, paper, scissors … spock
> Support
> Easy one fo r commo n case
> Strong one for specific case
> Stronc database
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Come back to reality…
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= 0,053 W/mK
TB calculation
Bisco
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= 0,053 W/mK
= 0.358 W/mK
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TB calculation
Eurokobra
www.cstc.be/go/KOBRA
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Calcul pont thermique
Eurokobra
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Renovation
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Method glaser:
Vapour break
Mu= 200000
MethodMethod glaser glaser::
Vapour Vapour break:break:
Mu 26000Mu 26000
Mu= 260Mu= 260
RegardingRegarding HRHR
??????????
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1956
>16 M GBP/y
WUFI
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Wufi:
Calcul dynamique comportement
Hygrométrique de la paroi
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I never think about the future
it comes soon enough.
Albert Einstein