The Element office building is an exciting 14,000 sqm prime development in Maroussi, Athens. The Architects are SPARCH, while Arbitrage Real Estate is acting as Project Manager on behalf of Prodea Investments.
The scope of our work was to suggest façade configurations (with regard to glazing & shading combinations) that met the set solar performance requirements and follow the architectural intent.
Ensure good thermal comfort levels
Conclusions we derived from our indoor climate study:
1. Gaps will significantly increase discomfort especially to occasions with low sun angles. If we consider 28°C as the maximum allowed COT, the gaps will cause discomfort for rather many hours over the year (in blue).
2. An internal roller blind of 10% Openness Factor, will significantly reduce the overheating risk (COT marginally exceed 30 °C). However, COT is expected to exceed 28°C for quite a few hours over the year. As internal fabrics of 10% OF will not be sufficient for glare control, they can be used only to improve the thermal comfort of the occupants.
3. An internal roller blind of 5% Openness Factor, will perform significantly better (than a 10% OF fabric) as it only marginally exceeds the recommended 28°C for very few hours over the year. In this case, the internal roller blind can also be used for glare control.
4. The advantage of frit is that is a angle interdependent and yet an unevenly distributed solar control mechanism. This means that we can place frit in the areas more required without altering the quality of transmitted light nor unnecessarily reducing the Light Transmittance values. The assessment of the required frit on each glazing unit was based on a spatial analysis of the (Corrected) Operative Temperature.
Limit solar gains
The dimensioning of the movable vertical external screens, was initially done by considering the maximum transmitted solar radiation (W/m²) as instructed by the HVAC engineers.
Considering the 50% perforation of the screens, we depicted the minimum ratios allowed in order to meet the maximum transmitted solar radiation (W/m² glazed area) requirements set by the HVAC engineers. The ratios can potentially be higher (to serve design) but not lower than the ones indicated, to meet the set targets