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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• 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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potreba tepla na vytápení
kWh/(m2a)
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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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E kWh/(m2a)
0 0,2 1,0
A/V
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Czech house Malmö
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závery

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Figure 1Optimistic prognosis of energy use for
heating in general - simple parametric study (A
all new buildings (1  per year) in low-energy
standard (50 kWh/(m2year), B all new buildings
(1 ) in passive-house standard (15 kWh/(m2year),
C all new buildings (1 ) in low-energy
standard all refurbishments (3 ) with
70 kWh/(m2year), D - all new buildings (1 ) with
30 kWh/(m2year) all refurbishments (3 ) with
50 kWh/(m2year)
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Figure 1Optimistic prognosis of energy use for
heating in general - simple parametric study (A
all new buildings (1  per year) in low-energy
standard (50 kWh/(m2year), B all new buildings
(1 ) in passive-house standard (15 kWh/(m2year),
C all new buildings (1 ) in low-energy
standard all refurbishments (3 ) with
70 kWh/(m2year), D - all new buildings (1 ) with
30 kWh/(m2year) all refurbishments (3 ) with
50 kWh/(m2year)
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Figure 1Optimistic prognosis of energy use for
heating in general - simple parametric study (A
all new buildings (1  per year) in low-energy
standard (50 kWh/(m2year), B all new buildings
(1 ) in passive-house standard (15 kWh/(m2year),
C all new buildings (1 ) in low-energy
standard all refurbishments (3 ) with
70 kWh/(m2year), D - all new buildings (1 ) with
30 kWh/(m2year) all refurbishments (3 ) with
50 kWh/(m2year)
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Figure 1Optimistic prognosis of energy use for
heating in general - simple parametric study (A
all new buildings (1  per year) in low-energy
standard (50 kWh/(m2year), B all new buildings
(1 ) in passive-house standard (15 kWh/(m2year),
C all new buildings (1 ) in low-energy
standard all refurbishments (3 ) with
70 kWh/(m2year), D - all new buildings (1 ) with
30 kWh/(m2year) all refurbishments (3 ) with
50 kWh/(m2year)
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Dum WEGER
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Dum MINERAL
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• 36,4 kWh/(m2a)

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22,4 kWh/(m2a)
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• puvodní 144 MWh/r
• obvyklá rekonstrukce 75 MWh/r
• lepší úroven vynikající nástavba cca. 45 MWh/r
• špickové rešení cca. 30 MWh/r

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energy distribution
demand reduction
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roofing
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50 ..... 100
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kotevní prvky
a
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• www.substance.cz
• tywoniak_at_fsv.cvut.cz