Mission impossible Stavanger, Günter Lang, IG Passivhaus Österreich

Transcription

1 Renovering av skolebygg til passivhusstandard internasjonale eksempler og erfaringer Mission impossible Stavanger, Günter Lang, IG Passivhaus Österreich

2 Yes we can! The Sanierung same place von 1960iger one year Bauten before renovation! zum Passivhaus Mission impossible Bratislava, Ing. Günter Lang

3 Mission possible

4 CO 2 Anstieg bis 2100 Es geht lediglich um das Überleben letzten 55 der Menschheit!, Jahre König Carl XVI. Gustaf von Schweden (ORF, ) CO 2 Anstieg binnen der Temperatur Anstieg der letzten 55 Jahre Bis 6,4 C Temperatur Anstieg bis IPCC- Bericht des UN-Klimarat

5 Industrialised countries have to reduce their emissions in minimum by 25 to 40 percent till 2020 in compare to 1990, advised the UNclimate council in 2007 It s the only chance to keep global warming lower than 2 Celsius in compare to preindustrial values. But the real development of climate is already worse than the worst case scenario of the IPCC report by now. Every additional hesitation will have fatal aftermath!

6 The European Parliament calls on the Commission and member states to use all potentials of energy efficiency at buildings. It s proposed as a binding requirement that all new buildings be constructed to passive house standard from 2011 onwards All new residential buildings should be net zero-energy performance by 2015 European Parliament resolution of 31 January 2008 and 4 February 2009 on an Action Plan for Energy Efficiency: Realising the Potential and "2050: The future begins today

7 Office and factory of WEISSENSEER Holzsystembau, Greifenburg / K EPBD EU Directive Energy Performance of Buildings Article 4 and 5: Minimum requirements on total energy efficiency They also have to accord to the lowest level of costs till the whole lifecycle of the building regarding to all costs of investment, operation and maintenance, including energy costs

8 EPBD EU Directive Energy Performance of Buildings Article 9: Buildings, which CO 2 emissions and primary energy consumption are lower or equal null The member states are obligated to encourage a higher market penetration of such buildings and to achieve a leading position of public buildings (by 2011). Community centre in Ludesch / Vbg, Arch. DI Hermann Kaufmann

9 Estimated sectoral economic mitigation potential in 2030 IPCC Working Group I

10 European Master Plan of Energy Change 490 bn. till /m² subsidy for retrofit of all postwar buildings in EU Result: 85% energy savings + rest 100% renewable energy 5,0 bn. m² living area TWh/a energy saving 530 m. to CO 2 savings 12,25 m. additional jobs Win Win strategy against economic crises!

11 Annual heat requirement for buildings in kwh/m²a Household energy Ventilation energy Hot water Heating

12 Waste energy in old houses Middle energy demand 150 kwh/m²a X 3 floors

13 Waste energy in old houses Middle energy demand 150 kwh/m²a X 3 floors = 4 5 m high gas tower for demand/a 450 kwh/m²a groundfloor 10% = 45 m gas volume tower

14 Waste energy in old houses Middle energy demand 150 kwh/m²a -95% 7,5 kwh/m²a 4 5 m high gas tower for demand/a

15 CO 2 -concentration during a day in a school model based Quelle: Messergebnisse Luftqualität an OÖ. Schulen Land OÖ Umwelt- und Anlagentechnik

16 Operation of an mechanical ventilation system (18 m³/h pro pupil) Developement of CO 2 -concentration :00 08:20 08:40 09:00 09:20 09:40 10:00 10:20 10:40 11:00 11:20 11:40 12:00 12:20 12:40 13:00 13:20 13:40 14:00 14:20 14:40 15:00 CO2-concentration [ppm] Hygiene border Pettenkofer - Number Time

17 Influence of ventilation on heating demand and heating load Strategy 5 minutes intermittent ventilation 10 minutes intermittent ventilation Continuous window ventilation Comfort ventilation 18 m³/h.pupil Heating demand Electricety for ventilation Max. heating load kwh/m²a kwh/m²a W/m²

18 Requirements on the ventilation of a class room: amount of air m³/h per pupil ( m³/h per class) high efficient heat recovery (>85%) economic ventilation with a power input of ca. 0,35 W per m³/h integration of silencers and air in-/outtakes in the compact ventilation (assembly effort, aesthetics, acoustics) highest acoustic quality (ca. 30 db) adjusted to the needs of control (presence and humidity sensor; summer cooling by temperature difference, etc.)

19 Result The energetic wise operation of mechanic ventilation in class rooms is leading to: Higher concentration of pupils and better learning success Healthy learning (also because of less noise), less absenteeism Higher quality of workplace for pedagogues connected with higher satisfaction

20 First Passive House School Retrofit in Austria - in Schwanenstadt Optimised thermal quality concept in schools Retrofit with renewable resources Retrofit without disturbance of school operation Modern design with prefabrication

21 First passive house school renovation Facelifting for old school Individual ventilation units as compact units Health points: Danger of indoor emissions - Kohlenstoffdioxid, Radon, Schimmel - Chemische Schadstoffe: Formaldehyd, Flüchtige organ. Verbindungen, Lindan, Pentachlorphenol, Polychlorierte Biphenyle PCB - Noise from streets

22 Central Decentral Ventilation Concepts

23 External wall in compare of thermal retrofit variations Conventional retrofit Passive house retrofit 8cm rock wool 58cm cellulose + wood constr. U i.m. = 0,37 W/m²K U i.m. = 0,08 W/m²K GWP = 19,8 kg CO 2 /m² GWP = -27,5 kg CO 2 /m²

24 Super envelope for old school New facade fixed to the old pillars U-value = 0,08 W/m²K 58 cm insulation between wood construction

25

26

27

28

29 Space heat from 135 kwh/m²a to 14,1 kwh/m²a Reduction of energy kwh / a Faktor 10 Reduction of daylight using ca. 15 kwh/m²a Additional costs Passive house standard ca. 8% Costs for daylight management ca. 2% Costs for ecological matirials ca. 3%

30

31 Retrofit on passive house standard of public buildings ist worth it Demonstrationsprojekt Schule Schwanenstadt mit Sonderförderungen Demonstrationsprojekt Schule, jedoch ohne Sonderförderungen Berechnungsbasis: Energiekostensteigerung: Gas 12%/a, Strom 6%/a, Pellet 5%/a Bankdarlehen zur Finanzierung der Gemeindeinvestitionen, Laufzeit 20 Jahre, 5% Zinssatz Innovative Mehrkosten für Demonstrationsprojekt 13%, Wartungskosten 0,60/m²a f. Filter CO 2 Zertifikatskosten 30.-/to CO2 mit 10% Steigerung/a

32

33

34

35 The only unlimited energy source is energy efficiency! Energy efficiency never stops and future supply is 100 % sure Energy efficiency does not get more expensive (like fossil fuels) Energy efficiency is good for the environment and health Energy efficiency makes you independent We need to use enormous amount of Energy Efficiency!