en09 0085 foret - cstb€¦ · > rémy foret cstb - center for building science and technology...
Post on 27-Jul-2020
0 Views
Preview:
TRANSCRIPT
27/10/09 | EURONOISE 2009 | Edinburgh | CSTB-DAE-LABE | PAGE 1
> Rémy FORETCSTB - Center for Building Science and Technology
Effect of spacer designson acoustic performance
of windows
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 2
Effect of spacer designs on acousticperformance of windows
1. Introduction
2. Tests description1. Description of an Insulating Glazing Unit (IGU)
2. Tested configurations
3. Experimental configurations
3. Sound reduction results1. Sound transmission through 4-16-4 insulating glazing unit
2. Experimental results
3. Discussions
4. Conclusions
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 3
Effect of spacer designs on acousticperformance of windows
1. Introduction
Laboratory measurementsaccording to ISO 140-3
Important variation of soundreduction index
30 dB ≤ Rw ≤ 35 dB
24 dB ≤ Rw+Ctr ≤ 30 dB
Rw of 92 windows 4(16 - 20)4
0
5
10
15
20
25
30
35
40
45
50
30 31 32 33 34 35Rw
Num
ber
ofm
easu
rem
ents
RA,Tr of 92 Windows 4(16 - 20)4
0
5
10
15
20
25
30
35
40
45
50
24 25 26 27 28 29 30
RA,Tr
Nu
mb
er
ofm
easu
rem
en
ts
Minimum for French certification of windows
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 4
Effect of spacer designs on acousticperformance of windows
1. Introduction
Rw of 92 windows 4(16 - 20)4
0
5
10
15
20
25
30
35
40
45
50
32 33 34 35
Rw
Num
ber
of
mea
sure
ments
All
ALU
PVC
Wood
RA,tr of 92 windows 4(16 - 20)4
0
5
10
15
20
25
30
35
40
45
50
24 25 26 27 28 29 30
RA,tr
Num
ber
of
mea
sure
ments
All
ALU
PVC
Wood
Minimum for French certification of windows
Rw of 92 windows 4(16 - 20)4
0
5
10
15
20
25
30
35
40
45
50
32 33 34 35
Rw
Num
ber
ofm
easure
ments
All
Window
Door Window
RA,tr of 92 windows 4(16 - 20)4
0
5
10
15
20
25
30
35
40
45
50
24 25 26 27 28 29 30
RA,tr
Num
ber
ofm
easure
ments
All
Window
Door Window
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 5
Effect of spacer designs on acousticperformance of windows
1. Introduction
Disparities on sound reduction possibilities:
> Type of casement
> Air tightness
Despite these two obvious parameters, others caninfluence:
> Gas filling the cavity
> IGU panes thickness
> IGU structural connections
> Spacer bar
> Sealants (tightness barrier & sealant barrier)
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 6
Effect of spacer designs on acousticperformance of windows
1. Introduction
To avoid thermal loss by edges,glass industry developed so-calledlow conductive spacers or « warm-edges » (lower conductivity thanaluminium)
g
12%12%
46%46%
18%18%
48%48%
UUww = 2.4= 2.4W/(m.K)W/(m.K)
UUww = 1.6= 1.6W/(m.K)W/(m.K)
Heat loss
PVC
Up to 40% of total thermal losses of a building by the windows
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 7
Effect of spacer designs on acousticperformance of windows
2. Tests description
A. Insulating GlazingUnit (IGU)
> Standard IGUs> 2 panes of glass
> Gas cavity (air or argon)
> Spacer bar (aluminium)
> Sealant (PU)
> New IGUs with « warm-edges »> Spacer bar (having a lower
conductivity than aluminium) ornone
> Sealant barrier (PU, Silicone…)
4 4
3
6.5
Float glass pane
Tightness seal (butyl)
Molecular sieve
Sealant barrier(polyurethane)
Spacer bar (aluminium)
16
Foam withmolecular sieve
Vapour barrier
PS, PU, Silicone
Thermo plastic
PS, PU, Silicone
Foam spacer Thermo plastic spacer
Standard IGU
IGU with « warm-edge » spacers
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 8
Effect of spacer designs on acousticperformance of windows
2. Tests description
B. Tested configurations> 7 configurations of 4-16-4 IGU
> Different combinations of spacer barand sealant (including “warm-edges”techniques)
> Blocked parameters with variableones (if possible) to investigate theinfluence of spacer bar type andsealants barrier type
Butyl sealPolyurethaneThermo plasticConfiguration 7
NoneHot melt butylFoamConfiguration 6
Butyl sealPolyurethaneThermo plasticConfiguration 5
Butyl sealPolyurethaneCompositeConfiguration 4
Butyl sealPolysulfureAluminiumConfiguration 3
Butyl sealHot melt butylAluminiumConfiguration 2
Butyl sealPolyurethaneAluminiumConfiguration 1
Tightness sealtype
Sealant barriertype
Spacer bar typeConfiguration #
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 9
Effect of spacer designs on acousticperformance of windows
2. Tests description
C. Experimental set-up
> European Laboratory of BuildingAcoustic (LABE)
> Measurement according to the ISO140-3 Standard
> Overall weighted index Rw(C;Ctr)according to ISO 717-1 Standard
> Each previous configuration:
> 1.45 x 1.48 m² aluminiumprojecting window
> 1.23 x 1.48 m² IGU
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 10
Effect of spacer designs on acousticperformance of windows
3. Results
10
15
20
25
30
35
40
45
50
55
60
10
0
12
5
16
0
20
0
25
0
31
5
40
0
50
0
63
0
80
0
10
00
12
50
16
00
20
00
25
00
31
50
40
00
50
00
One-third octave band centre frequency [Hz]
So
un
dre
ductio
nin
de
xR
[dB
]
CONF #1 - Rw+Ctr = 28 dB CONF #2 - Rw+Ctr = 29 dB
CONF #3 - Rw+Ctr = 27 dB CONF #4 - Rw+Ctr = 27 dB
CONF #5 - Rw+Ctr = 28 dB CONF #6 - Rw+Ctr = 26 dB
CONF #7 - Rw+Ctr = 27 dB
10
15
20
25
30
35
40
45
50
55
60
10
0
12
5
16
0
20
0
25
0
31
5
40
0
50
0
63
0
80
0
10
00
12
50
16
00
20
00
25
00
31
50
40
00
50
00
One-third octave band centre frequency [Hz]
So
und
reductio
nin
dex
R[d
B]
CONF #1 - Rw+Ctr = 26 dB CONF #2 - Rw+Ctr = 27 dB
CONF #3 - Rw+Ctr = 25 dB CONF #4 - Rw+Ctr = 26 dB
CONF #5 - Rw+Ctr = 26 dB CONF #6 - Rw+Ctr = 25 dB
CONF #7 - Rw+Ctr = 25 dB
IGUs in an aluminium casement IGU alone
ef
ss
ss
21
210 60
²)1(12
2
²
Eh
cfc
210 Hz
2950 Hz
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 11
Effect of spacer designs on acousticperformance of windows
3. Results
10
15
20
25
30
35
40
45
50
55
60
10
0
12
5
16
0
20
0
25
0
31
5
40
0
50
0
63
0
80
0
10
00
12
50
16
00
20
00
25
00
31
50
40
00
50
00
One-third octave band centre frequency [Hz]
So
un
dre
ductio
nin
de
xR
[dB
]
CONF #1 - Rw+Ctr = 28 dB CONF #2 - Rw+Ctr = 29 dB
CONF #3 - Rw+Ctr = 27 dB CONF #4 - Rw+Ctr = 27 dB
CONF #5 - Rw+Ctr = 28 dB CONF #6 - Rw+Ctr = 26 dB
CONF #7 - Rw+Ctr = 27 dB
10
15
20
25
30
35
40
45
50
55
60
10
0
12
5
16
0
20
0
25
0
31
5
40
0
50
0
63
0
80
0
10
00
12
50
16
00
20
00
25
00
31
50
40
00
50
00
One-third octave band centre frequency [Hz]
So
und
reductio
nin
dex
R[d
B]
CONF #1 - Rw+Ctr = 26 dB CONF #2 - Rw+Ctr = 27 dB
CONF #3 - Rw+Ctr = 25 dB CONF #4 - Rw+Ctr = 26 dB
CONF #5 - Rw+Ctr = 26 dB CONF #6 - Rw+Ctr = 25 dB
CONF #7 - Rw+Ctr = 25 dB
IGUs in an aluminium casement IGU alone
CONF. #6
Foam spacer bar
Hot Melt
CONF. #2
Aluminium
Butyl
Hot Melt
CONF. #6
Foam spacer bar
Hot Melt
CONF. #2
Aluminium
Butyl
Hot Melt
6 dB
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 12
Effect of spacer designs on acousticperformance of windows
3. Results
Results> Huge disparities (same order than
PVB laminated glass with PVBinterlayer)
> Rw+Ctr from 26 dB to 29 dB for awindows with 4-16-4 IGUs
> Remark: minimum required acousticperformance for French certificationof window ACOTHERM AC1Rw+Ctr≥28 dB
> Depending on the spacer bar andthe sealants type, the window iscertified or not
> The spacer bar and sealant typeshave an influence on the soundreduction index R
2527Butyl sealPolyurethaneThermo plasticConfiguration 7
2526NoneHot melt butylFoamConfiguration 6
2628Butyl sealPolyurethaneThermo plasticConfiguration 5
2628Butyl sealPolyurethaneCompositeConfiguration 4
2527Butyl sealPolysulfideAluminiumConfiguration 3
2729Butyl sealHot melt butylAluminiumConfiguration 2
2628Butyl sealPolyurethaneAluminiumConfiguration 1
Rw+Ctr
IGU(dB)
Rw+Ctr
Window(dB)
Tightness sealtype
Sealant barriertype
Spacer bar typeConfiguration
#
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 13
Effect of spacer designs on acousticperformance of windows
3. Results
Results
> Influence of the spacer bar ?> Influence of the sealant barrier ?> Influence of the tightness seal ?
2527Butyl sealPolyurethaneThermo plasticConfiguration 7
2526NoneHot melt butylFoamConfiguration 6
2628Butyl sealPolyurethaneThermo plasticConfiguration 5
2628Butyl sealPolyurethaneCompositeConfiguration 4
2527Butyl sealPolysulfideAluminiumConfiguration 3
2729Butyl sealHot melt butylAluminiumConfiguration 2
2628Butyl sealPolyurethaneAluminiumConfiguration 1
Rw+Ctr
IGU(dB)
Rw+Ctr
Window(dB)
Tightness sealtype
Sealant barriertype
Spacer bar typeConfiguration
#
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 14
Effect of spacer designs on acousticperformance of windows
3. Results
Uncertainties/checking ofthe results
> Mounting of the IGUs was checked:
good repeatability
> A 2nd test campaign was led on IGUs(from different manufacturers)mounted in PVC sash
> The same tendencies wereobserved
26NoneHot melt butylFoamConfiguration 3
28Butyl sealHot melt butylAluminiumConfiguration 2
27Butyl sealPolyurethaneAluminiumConfiguration 1
Rw+Ctr (dB)Tightness seal
typeSealant barrier
typeSpacer bar
typeConfiguration
#
0
10
20
30
40
50
60
70
100
125
160
200
250
315
400
500
630
800
1000
1250
1600
2000
2500
3150
4000
5000
Fréquence [Hz]
Indic
ed'a
ffaib
lissem
en
ta
cou
stiq
ue
R[d
B]
CONF #2 - Rw+Ctr = 29 dB CONF #2bis - Rw+Ctr = 29 dB
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 15
Effect of spacer designs on acousticperformance of windows
3. Results
10
15
20
25
30
35
40
45
50
55
60
10
0
12
5
16
0
20
0
25
0
31
5
40
0
50
0
63
0
80
0
10
00
12
50
16
00
20
00
25
00
31
50
40
00
50
00
One-third octave band centre frequency [Hz]
Sou
nd
red
uctio
nin
de
xR
[dB
]
Measurement - CONF #6 - Rw+Ctr = 26 dB
Measurement - CONF #2 - Rw+Ctr = 29 dB
Computation - CASC (TMM)
10
15
20
25
30
35
40
45
50
55
60
100
125
160
200
250
315
400
500
630
800
10
00
12
50
16
00
20
00
25
00
31
50
40
00
50
00
One-third octave band centre frequency [Hz]
So
un
dre
du
ction
ind
ex
R[d
B]
Measurement - CONF #6 - Rw+Ctr = 26 dB
Measurement - CONF #2 - Rw+Ctr = 29 dB
Computation - ARGOS (Modal method)
Using Transfer Matrix Method Using Modal approach
ModellingModelling
ef
ss
ss
21
210 60
²)1(12
2
²
Eh
cfc
210 Hz
2950 Hz
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 16
Effect of spacer designs on acousticperformance of windows
4. Conclusions
Conclusions> The spacer bar and sealants type have a major the sound reduction index R of IGUs and thus windows> These observations can be made on both measurements (IGUs alone or equipping a double leaves
projecting window)> It affects edge damping and peripheral coupling and thus R (Rw+Ctr)> Quid of impact of tightness barrier seal type ?> Attention has to be paid to avoid non-regulatory situations…(DnTA,tr≤30 dB)
Perspectives> Large test campaign on IGUs (2010)> Finite Element Method modelling> Necessity of PhD thesis on the subject (2010)> The performance of an IGU is not only based on glass and gas cavity thicknesses> For glass manufacturers, necessity to take into account both thermics AND acoustics in their
development
27/10/09 | EURONOISE 2009 | Edinburgh | Sound Insulation in Buildings | CSTB-DAE-LABE PAGE 17
Effect of spacer designs on acousticperformance of windows
Acknowledgement
We gratefully acknowledge:> Chairmen: Bob CRAIK and Carl HOPKINS
> CSTB: Catherine GUIGOU CARTER / Jean-Baptiste CHENE / Philippe JEAN
> French Ministry of Housing (especially DHUPFrench Housing, Urban planning andLandscape Department)
> VEKA company for providing windows
> OUEST Alu company for providing windows
Thank you for your attention
top related