Engert, Scheriau, WimmerSS 2010

Energy and sustainable development, Prof. Schleicher

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

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

Heating

Cooling

Electricity

Water use

Oil heatingGas heating natural gas

Pellet-fuelled

heating

District heating

Heat pumpWood chips

heating

Renewability – – + / / +Heating comfort + + + + + /

Required space / + / + + –Regional value added / / + / / +

Local environmental effects / + / + + –

Climate effects – – + + / +Shelf life + – + – – +

Market development / trend – / + + + +

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

Central air conditioning

Decentral air conditioning

Fan coil units

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

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

water reduction in office kitchen and toilets

leaking taps tap aerators toilets with dual-flush water efficient dishwasher

in Floridsdorf, 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

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

Heating and Cooling

◦ Through building component activation

◦ Groundwater provides energy to temper the building

◦ Solarcooling

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

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

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%)

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)

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

Thank you for your

attention!