Author: Kristin Van Damme
Keywords: poster, template, sjabloon, A3, aanpasbaar

Analysis of thermal bridges
Kaho Sint-Lieven extension building

Rosa T. Monzo Gimeno
Thermal insulation analysis1

1 VAKGROEP IT - KAHO Sint-Lieven, Gebroeders De Smetstraat 1, 9000 Gent, Belgium

DETAIL A1

Ψobtained=-0,023W/m·K)

1,35m

ΨFlemish EPB=0,00W/(m·K)

Limit

Ψpassive house=0,01 W/(m·K)

Limit

DETAIL B1

Ψobtained
0,123W/(m·K)

ΨFlemish EPB
0,10W/(m·K)

Limit

Ψpassive house
0,01W/(m·K)

Limit

DETAIL B2

Ψobtained
0,116W/(m·K)

ΨFlemish EPB
0,10W(/m·K)

Limit

Ψpassive house
0,01W/(m·K)

Limit

U=0,253W/(m2·K)

U=0,076W/(m2·K)

1.59m

U=0,118W/(m2·K)

U=0,113W/(m2·K)

Ф=5,1W/m

1.60m

1.60m

U=0,118W/(m2·K)

modeled

isotherms

streamlines

Isotherms+ streamlines

Ф=7,220W/m

Ф=6.914W/m

DETAIL C1

1,35m

Ψobtained=-0,020W/m·K)

ΨFlemish EPB=0,00W/(m·K)

Limit

Ψpassive house=0,01W/(m·K)

Limit

modeled

0,053m

isotherms

streamlines

iso+ stream

modeled

0,053m

isotherms

streamlines

iso+ stream

U=0,062W/(m2·K)

U=0,063W/(m2·K)

1,71m

DETAIL C2

Ψobtained
0,131W/(m·K)

ΨFlemish EPB
0,10W/(m·K)

Limit

Ψpassive house
0,01W/(m·K)

Limit

DETAIL C4

Ψobtained
0,124W/(m·K)

ΨFlemish EPB
0,10W/(m·K)

Limit

Ψpassive house
0,01W/(m·K)

Limit

Ф=4,763W/m

U=0,118W/(m2·K)

U=0,118W/(m2·K)

U=0,113W/(m2·K)

modeled

isotherms

streamlines

Isotherms+ streamlines

These details are the joint between the façade and the roof.
There is no concrete slab and the elements that make this corner are timber I-beams. In C1, the beams in the roof are situated longitudinally and they are not in this calculation. This value cellulose 𝜆-value, 0,039 and the beam flangles 0,18, and web 0,13W/(m·K), are much lower than the concrete reinforced with 2% steel, 2,5 W/(m·K). With these characteristics is very easy to get a low Ψ-value, which allows to reach loosely the Ψ-value to Flemish-EPB, the most restrictive in this case.

Ф=7,341W/m

modeled

1.60m

0,053m

isotherms

streamlines

iso+ stream

Ф=7,040W/m

modeled

1.60m

0,053m

isotherms

streamlines

iso+ stream

DETAIL A2

U=0,118W/(m2·K)

Ψobtained=0,132W/(m·K)

ΨFlemish EPB=0,15W/(m·K)

Limit

Ψpassive house=0,01 W/(m·K)

Limit

DETAIL C3

Ψobtained
0,042W/(m·K)

ΨFlemish EPB
0,10W/(m·K)

Limit

Ψpassive house
0,01W/(m·K)

Limit

DETAIL C5

Ψobtained
0,035W/(m·K)

ΨFlemish EPB
0,10W/(m·K)

Limit

Ψpassive house
0,01W/(m·K)

Limit

1,45m

0,14m

0,14m

U=0,113W/(m2·K)

U=0,118W/(m2·K)

1,06m

1.06m

Ф=5,907W/m

Ф=6,030W/m

Ф=9,128W/m

1,34m

modeled

isotherms

streamlines

iso+ stream

modeled

isotherms

streamlines

iso+ stream

U=0,113W/(m2·K)

modeled

isotherms

DETAIL A3

Ψobtained=0,024W/(m·K)

U=0,113W/(m2·K)

Ф=10,490W/m

U=0,103W/(m2·K)

1,87m

streamlines

ΨFlemish EPB=0,00W/(m·K)

Limit

Isotherms+ streamlines

Ψpassive house=0,01W/(m·K)

Limit

U=0,118W/(m2K)

B1
Ψ =0,123W/(m·K)

𝜟

B2
Ψ =0,116W/(m·K)

U=0,113W/(m2K)

𝜟

𝜟

𝜟

C2
Ψ =0,131W/(m·K)

C4
Ψ =0,124W/(m·K)

𝜟

Shutter
U=0,118W/(m2·K)

comparation between details with lintels

It’s interesting to compare lintels. In figure next to this text we can see that the increase between details is not very large but B2-C2 is. The best detail is B2. This detail has the best U-value in its wall and there is no shutter.
Although the windowsill has the same limit Ψ-value in the EPB-regulation, they don´t have to support loads, thus the material piece is smaller and the Ψ-value too. For example in a window, details C2 with lintel and C3 with windowsill, have 0,131W/(m·K) and 0,042 W/(m·K) and the limit in this regulation is 0,10 W/(m·K) for both.

U=0,123W/(m2·K)

DETAIL D1

Ψobtained=0,053W/(m·K)

ΨFlemish EPB=0,15W/(m·K)

Limit

Ψpassive house=0,01W/(m·K)

Limit

Ф=4,883W/m

1,22m

1,00m

1,62m

unheated room (AOR)

unheated room (AOR)

unheated room (AOR)

unheated room (AOR)

unheated room (AOR)

U=0,097W/(m2·K)

unheated room (AOR)

U=0,055W/(m2·K)

U=0,183W/(m2·K)

unheated room (AOR)

unheated room (AOR)

U=0,370W/(m2·K)

modeled

isotherms

streamlines

Isotherms+ streamlines

Without cellular glass

Ψobtained=0,190W/(m·K)

ΨFlemish EPB=0,00W/(m·K)

Limit

Ψpassive house=0,01W/(m·K)

Limit

U=0,113W/(m2·K)

Ф=20,023W/m

U=0,103W/(m2·K)

1,87m

U=0,123W/(m2·K)

1,62m

unheated room (AOR)

unheated room (AOR)

unheated room (AOR)

unheated room (AOR)

U=0,370W/(m2·K)

modeled

isotherms

streamlines

Isotherms+ streamlines

This detail, A3, is the joint between the new and the old part of the building, the ground floor and the first one. The slab is the bound, the thermal envelope. The unheated room has been modeled as AOR according to Flemish-EPB.
The façade is part of building structure and the ground floor wall is made of brick with U=2,252W/(m2·K) and first floor façade is U=0,113 W/(m2·K). This conditions are very bad and for improving the detail, there’s the cellular glass inserted between the concrete ring and slab. This important improvement allows reach from 𝝍-value from 0,190 to 0,024 W/(m·K). This value cannot arrive to limit values defined in Flemish-EPB and Passive House but it is justificated because ground floor wall is made of brick.

modeled

isotherms

streamlines

Isotherms+ streamlines

This detail is the joint between second floor (down), the technical room (left) and the exterior (right). The
The calculation model of the Flemish EPB requires consideration of the utility room, having no heating, in AOR and therefore to consider a temperature of 0 °C.
Although this point is the point of greatest slope of the roof, and therefore the best deck isolated in the deck, the characteristics metioned before cannot allow get Ψ-value lower.
The Ψ-value obtained is good but it can’t fit in Passive House standard.

	Material	𝜆
	W	/(m·K)
s	lightly ventilated air cavity / -
w	ood fiber boards / 0	,05
c	ellulose / 0	,039
O	SB3 / 0	,13
a	coustic panel / 0	,063
t	imber 700kg/m3 / 0	,18
t	imber 500kg/m3 / 0	,13
t	imber window frames / 0	,1436*
t	imber flange I-beams / 0	,13
f	ibreboard web I-beams / 0	,18
p	lasterboard / 0	,21
c	oncrete with 2%steel / 2	,5
b	rick / 0	,26
c	ompressive strenth / 0	,05
u	nventilated air cavity / -
g	lasswool / 0	,04
S	olid brick / 1	,46

	Type	Temperature	Rsi, Rse
	Exterior, normal	0ºC	0,04 m2K/W
	Exterior, ventilated	0ºC	0,13 m2K/W
	Interior, normal, horizontal	20ºC	0,13 m2K/W
	Interior, heat flux, upwards	20ºC	0,10 m2K/W
	Interior, heat flux, downwards	20ºC	0,17 m2K/W
	AOR (unheated room)	0ºC	0,13 m2K/W

D1

C1

A1

B1

C2

A2

B2

C3

C4

A3

C5

Rosa T. Monzo Gimeno
Thermal insulation analysis 1
With Reference1,3
To Company3,4
In Superscript2

1 VAKGROEP IT - KAHO Sint-Lieven, Gebroeders De Smetstraat 1, 9000 Gent, Belgium
2 DISTRINET - Katholieke Universiteit Leuven, De Croylaan 56, 3001 Leuven, Belgium
3 Aqua-ERF, KAHO Sint-Lieven, Hospitaalstraat 23, 9001 Sint-Niklaas, Belgium
4 Opleiding Vastgoed, KAHO Sint-Lieven, Kwalestraat 154, 9320 Aalst, Belgium