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Department of Building Construction, Faculty of Civil Engineering. EnerBuild RTD workshop, Prague 27.01.2003. Jan Tywoniak group for building physics and sustainable building. t. thermal performance of buildings overall sustainability related to buildings. Thermal performance. - PowerPoint PPT Presentation
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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
t• thermal performance of
buildings
• overall sustainability related to buildings
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.
Sustainability - agenda
• thermal performance in environmental con-text
• LC design principles and assessments
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)
- 0 15 50 100 200 ....
potřeba tepla na vytápění
kWh/(m2a)
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
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)
0 0,2 1,0 A/V
E [kWh/(m2a)]
80
145
Czech house Malmö
závěry
0
2000
4000
6000
8000
10000 kg
CO
2/r
ok
a b c d e
konstrukce vytápění TUV
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
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
Dům WEGER
Dům MINERAL
36,4 kWh/(m2a)
22,4 kWh/(m2a)
• původní 144 MWh/r
•obvyklá rekonstrukce 75 MWh/r
•lepší úroveň + vynikající nástavba cca. 45 MWh/r
•špičkové řešení cca. 30 MWh/r
0
1
2
3
4
5 C
F [
kW
h/k
Wh
]
electrogas
solarsolar+electro
solar+gaspV
woodenvelope
energy distribution demand reduction
roofing
+ 50 ..... + 100 %
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
kotevní prvky
a
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