Performance Analysis of Commercial Buildings Results and Experiences from the German Research and Demonstration Program EnOB

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1 QUT, Brisbane Performance Analysis of Commercial Buildings Results and Experiences from the German Research and Demonstration Program EnOB Andreas Wagner, Karlsruhe Institute of Technology, Germany

2 Content The German research program EnOB New building technologies for high energy efficiency Monitored performance of EnOB demonstration buildings Energy Efficiency made in Germany, October , Bridgeport

3 Structure of the research program EnOB Source: BMWi

4 Technologies Building technologies matrix Projects Years Source:

5 Source: Insulation standard Introduction of passive house standard in non-residential buildings between (new facade technologies), new buildings and refurbishment Vacuum insulation from single elements to prefabricated systems

Vacuum insulation Super insulation with a minimum of material thickness Factor 10 in heat conductivity 2 cm vacuum insulation = 20 cm conventional insulation Challenges: -

6 Vacuum insulation Super insulation with a minimum of material thickness Factor 10 in heat conductivity 2 cm vacuum insulation = 20 cm conventional insulation Challenges: - vulnerability of material (protective layers) - no cutting on building site (precise pre-sizing of panels) - durability Metal coated foil Silicon dioxide Source: ZAE Bayern

7 Vacuum insulation Source:

Sources: TU Dresden, Dittert Reumschüssel and

moisture barriers and condensation in the building

Trade-off between highly efficient insulation and

8 Sources: TU Dresden, Dittert Reumschüssel and Fraunhofer IBP Interior insulation Solving problems of moisture barriers and condensation in the building construction by using the effect of capillar transport Trade-off between highly efficient insulation and simple construction in historical buildings Temperature Water content

9 Source: Passive cooling Different heat sinks: between 1995 and 2005 cooling with (natural) night ventilation then increased application of thermally activated concrete slabs together with boreholes, earth piles or ground water until 2000 application of groundto-air heat exchangers

10 Source: SolarBau:Monitor Thermally activated building systems (TABS) natural heat sink (source) Heat pump In winter: ground used as a heat source, temperature lift with heat pump, low temperature radiant heating

11 Source: EControl-Glas GmbH Switchable glazing tungsten coating, activated by electric current g-value = 0,36 0,12

12 AS Solar factory building, Hannover Source: Architecture: John M. Fink Energy concept: energydesign braunschweig GmbH Monitoring: EOS, Ostfalia University AS Solar Aldi GmbH, Süd, Fraunhofer Tom Baerwald ISE

13 Municipal services building, Remscheid Source: Architecture: Architektur Contor Müller Schlüter Energy concept: Ifl Ingenieurbüro F. Luca & Partner Monitoring: b+tga Bergische Universität Wuppertal Aldi Süd, AC Fraunhofer Müller Schlüter ISE

14 Supermarket, Rastatt Source: Architecture: Ingenieur- und Planungsbüro Finzel, Würzburg Energy concept: Fraunhofer ISE, Freiburg Monitoring: Fraunhofer ISE, Freiburg Aldi Süd, Fraunhofer ISE

15 Residential care home for the elderly, Stuttgart Source: Architecture: Heckmann, Kristel, Jung, Stuttgart Energy concept: ebök, Tübingen Monitoring: Fraunhofer IBP, Stuttgart Fraunhofer IBP

16 Historical building Kleine Freiheit, Hamburg Source: Architecture: Dittert & Reumschüssel, Hamburg Energy concept: innovatec Energiesysteme, Ahnatal Monitoring: Fraunhofer IBP Target GmbH, Hannover, Dittert & Reumschüssel Architektur und Stadtentwicklung, TUHH Institut für Angewandte Bautechnik, Passivhaus Darmstadt

17 Energy performance analysis of demo buildings: Comparison of German and US climate Heating degree days by census region based on 65 F (18.3 C) Germany: approx < HDD18 < 3500 Source: Energy Information Administration (2008)

18 Comparison of German and US climate Cooling degree days by census region based on 65 F (18.3 C) Germany: approx. 170 < CDD18 < 450 Source: Energy Information Administration (2008)

19 Source: Primary energy balance for HVAC+L (EnBau) non electrical electrical co-generation office PV Conventional German office buildings: kwh/m²a production research

Source: www.enob.info Primary energy consumption incl.

20 Source: Primary energy consumption incl. occupant appliances non electrical HVAC electrical HVAC+L electrical appl. office production research

21 Investment costs (construction and technical services) German building cost index high medium low Source: /m² gross area, before taxes

QUT, Brisbane 27.11.2012 Thank you for listening. Dank Merci u wel voor uw aandacht. pour votre attention. Danke für Ihre Aufmerksamkeit.

22 QUT, Brisbane Thank you for listening. Dank Merci u wel voor uw aandacht. pour votre attention. Danke für Ihre Aufmerksamkeit. More information: ww.enob.info Personal contact: wagner@kit.edu This work was funded by the Federal Ministry of Economics and Technology (BMWi)

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