Using Energy Energy strategies for an office building

1. Energy and sustainable development, Prof. Schleicher Using EnergyEnergy strategies for an office building Engert, Scheriau, Wimmer SS 2010

2. Overview • Empirical study for an office building • Building, actual state analysis, proposals for improvement • Energy efficient example of an office building • Proposals before building an office building

3. Building

4. Data of energy consumption • 6 Floors - 5,302.31 m2 • 97 offices + 3 common rooms • 31 aluminium shop windows with thermal glazing • 147 wooden windows with thermal glazing • no Insulation • Electricity consumption: 673.965 kWh • Cooling system: fan coil units • Heating system: District heating - 508,008 kWh • Water consumption: 4.870 m3

5. Proposalsforimprovement • Heating • Cooling • Electricity • Water use

7. ① Plasterboard ② Battens/dry lining ③ Vapour barrier ④ Adhesive tape with lathwork ⑤ Interior insulation between wooden battens ⑥ Previous interior plaster ⑦ Masonry ⑧ External plaster

8. Central air conditioning • Decentral air conditioning

9. Fan coil units

10. max. 3-5⁰ C less than outdoor temperature • windows closed • sun shades • fluorescent lamps and tubes, energy saving lamps and flat screens • plants • insulation • revolving door

11. ProposalsforimprovementElectrcity Energy saving installations • Power strips, socket switcher, power safer boxes, timer and motion sensors Lightning • Energy saving bulbs and motion sensors • Change of user behaviour

12. ProposalsforimprovementWater use • water reduction in office kitchen and toilets • leaking taps • tap aerators • toilets with dual-flush • water efficient dishwasher

13. Energy efficient example of an office building in Floridsdorf, Vienna

14. Energy efficient example of an office buildingEnergybase, Vienna • Office building in passivehouse standard • Size: 7 500 m2 for 200 offices and 300 jobs • Costs: about 14 million € • Construction time: june 2007 to july 2008

15. Energy efficient example of an office buildingEnergybase, Vienna • Certified passive house standard: • Insulation of 31 cm • Triple glazing • Ventilation with heat recovery • 80 % less energy consumption for cooling, heating, ventilation and lightning • Savings per year: 72 000 € • CO2-reduction: 180 tons per year

16. Energy efficient example of an office buildingEnergybase, Vienna • Heating and Cooling • Through building component activation • Groundwater provides energy to temper the building • Solarcooling

17. Energy efficient example of an office buildingEnergybase, Vienna • Use of renewable ressources: • Solar energy: 400 m2 pv facility: 42 000 kWh per year for electricity and 300 m2 solar thermal facility • geothermics for heating and cooling • hydro power to cover further energy demand

18. Energy efficient example of an office buildingEnergybase, Vienna • Additional facts: • Special sun blinds for light regulation • 65 % saving for lightning • 500 plants as green puffer zone • Groundwater for toiletts • Light-weight wood construction • No air condition and radiators

19. Proposalsbeforebuilding an officebuilding • Energy-efficient technologies • Location (trees, landscaping, and hills can provide shade and block wind) • South facing windows increases the amount of sun, entering the building, minimizing energy use, by maximizing passive solar heating • Tight building design (insulation), including energy-efficient windows, well-sealed doors, and additional thermal insulation of walls, basement slabs and foundation (reduce heat by 25 to 50%)

20. Lightly colored roofs (energy reduction about 40 percent for cooling than buildings with darker roofs) • Proper placement of windows and skylights and use of architectural features that reflect light into a building (reduce need for artificial lightning) • Compact fluorescent lights • Water efficient products and appliances (toilets with dual flush, water efficient taps)

21. http://www.youtube.com/watch?v=Uy2gp312hjY

22. Thank you for your attention!