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Engert, Scheriau, Wimmer SS 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 m 2 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 m 3
Heating Cooling Electricity Water use
Oil heating Gas heating natural gas Pellet- fuelled heating District heating Heat pump Wood 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 m 2 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 € ◦ CO 2 -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 m 2 pv facility: 42 000 kWh per year for electricity and 300 m 2 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)
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