Cost optimal facade design solutions of office buildings Tallinn 10.10.2013. Martin Thalfeldt PhD student in TUT www.nzeb.ee. Objectives. Developing energy and cost efficient facade design principles for nearly zero energy building ( non-residential ) Studies so far : window U>1.0
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Smallestenergyconsumption ≠ min €
Highly transparent glazingallowsreachingbetterenergyefficiency!
Office floor primary energy=85.5 x 1.2 = 102.6 kWh/m2
Office floor primary energy=93.6 x 1.2 = 112.6 kWh/m2
3 panes, WWR 37.5% (Costoptimal)
4 panes, WWR 37.5% (North 60%)
5 panes, WWR 29.5%
5 panes, WWR 60% (Energyefficient)