Calculating Thermal Bridges and Fabric Moisture - Sebastian Moreno, Passivhaus Belgium

8/18/2019 Calculating Thermal Bridges and Fabric Moisture - Sebastian Moreno, Passivhaus Belgium

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Camden and Islington passivhaus conference

Calculatingthermalbridges

and fabricmoisture

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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passivhaus conference

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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passivhaus conference Therm

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

Documents

Calculating Thermal Bridges and Fabric Moisture - Sebastian Moreno, Passivhaus Belgium