Department of Building Construction, Faculty of Civil Engineering
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Transcript of Department of Building Construction, Faculty of Civil Engineering
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Department of Building Construction, Faculty of Civil
Engineering
Jan Tywoniakgroup for building physics and
sustainable building
EnerBuild RTD workshop, Prague 27.01.2003
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t• thermal performance of
buildings
• overall sustainability related to buildings
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Thermal performance
• low-energy buildings (design, analysis)
• studies of real-quality (irregularities, air-tightness, etc.)
• moisture in building envelope
• radon distribution phenomena, design rules
• etc.
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Sustainability - agenda
• thermal performance in environmental con-text
• LC design principles and assessments
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Legislation Tools - developed or supported
• Translation Agenda 21 on Sust.Construction CIB-report
• Czech standard CSN 730540-2 Thermal protection - Requirements
• Analysis for up-grade of Energy-Managent Act + government. 291/2001...
• studies for Guidelines for Sustainable Building (starting point)
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- 0 15 50 100 200 ....
potřeba tepla na vytápění
kWh/(m2a)
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0
0,20,4
0,60,8
1
1,21,4
1,6
0 20 40 60
U [
W/(
m2K
)] stěna
střecha
1949 2002
vlastnosti konstrukcí
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new CZ standard U-Value building envelope
limit target low-energy• wall leight weight 0,30 0,20 0,15 massive 0,38* 0,25• roof leight weight 0,24 0,16 0,12
massive 0,30 0,20• window new 1,80+ 1,20 0,8• refurbished 2,00 1,35
• * simple wall: 0,46 (31.12.2004)• + 2,0 (31.12.2003)
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0 0,2 1,0 A/V
E [kWh/(m2a)]
80
145
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Czech house Malmö
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závěry
0
2000
4000
6000
8000
10000 kg
CO
2/r
ok
a b c d e
konstrukce vytápění TUV
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existing refurbished + extendedU-value walls 1,0 W/(m2K) 0,20 W/(m2K)*U-value flat roof 1,0 W/(m2K) not relevantU-value pitched roof -- 0,16 W/(m2K)*U-value windows 2,9 W/(m2K) 1,3 W/(m2K)slab-on-ground floor, floor slab 1,6 W/(m2K) 0,7 W/(m2K)heated floor area (approx.) 637 m2 1079 m2
heat use related to 1 m2 heated area** 223 kWh/(m2year) 41 kWh/(m2year)***primary energy use (non renewable) 278 MWh/year 5 MWh/yearheating and ventilation system natural gas boiler,
natural ventilationsolar collector 120 m2 +water storage tank 10 m3
biomass heating, controlledventilation with heatrecovery + earth heatexchanger
use of renewable energy sources 0 % 100 %(36 % solar, 64 % biomass –wooden chips )
* energy effects of thermal bridges included** based on EN 832 calculation*** 31 kWh/(m2year) for new part extra
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0
2
4
6
8
10
EP
B(E
) [a]
A-C A-E C-E A-F C-F
2.7GWh 1.8GWh4.5GWh
0.5GWh
3.2GWh
0
2
4
6
8
10 E
PB
(C
O2) [a]
A-C A-E C-E A-F C-F
444 t
304 t748 t
72 t515 t
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Dům WEGER
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Dům MINERAL
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36,4 kWh/(m2a)
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22,4 kWh/(m2a)
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• původní 144 MWh/r
•obvyklá rekonstrukce 75 MWh/r
•lepší úroveň + vynikající nástavba cca. 45 MWh/r
•špičkové řešení cca. 30 MWh/r
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0
1
2
3
4
5 C
F [
kW
h/k
Wh
]
electrogas
solarsolar+electro
solar+gaspV
woodenvelope
energy distribution demand reduction
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roofing
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+ 50 ..... + 100 %
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0.0001
0.001
0.01
0.1
1
10
100
Příd
avn
ý t
ep
eln
ý t
ok [
W/K
]
1 Pa 10 Pa 20 PaTlakový rozdíl
0,11g/h
1,46g/h3,20g/h
0,02g/h
12 3
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kotevní prvky
a