Regenerative and Positive Impact Architecture by Shady Attia

Author:Shady Attia
Language: eng
Format: epub
Publisher: Springer International Publishing, Cham

2.improve energy efficiency and

3.incorporate renewable energy and green power.

The building is located in latitude N 39.74 and longitude W 105.17 and is 151 m above sea level. The site receives 660 mm of rain per year with an average snowfall of 1371 mm. The number of days with any measurable precipitation is 73. On average, there are 242 sunny days per year in Golden, Colorado. The July high is around 30° and January low is −8 while humidity during the hot mon-ths, is a 58 out of 100. The building is a 20.400 square meter hosting 800 person. The building energy use intensity had to perform less than 80 kWh/m2/year and additional 20 kWh/m2 per year was allowed for a large data centre that serves the entire NREL Campus. The RSF facility had to perform 50% better that ASHRAE 90.1-2007 energy performance requirements. The project is a net zero energy building and obtained the LEED Platinum Certificate (V.2) and Energy Star Plus certification. The design brief also required maximum use of natural ventilation and 90% of floor space fully daylit.

With the help of building performance simulation (BPS) several passive design strategies were optimized. The building form and mass was shaped to host the main building functions influence by an energy saving approach. The RSF building has two wings sized and positioned to allow natural ventilation and lighting (see Fig. 6.1). The orientation of the two wings is elongated on the east-west axe to allow an easy control of solar access during summer. To achieve energy performance goals, the workspace layout is open, with low cubicle walls and light-coloured furniture that allow air to circulate and daylight to penetrate into the space. The aspect ratio is 13.5 and the window-to-wall-ratio is 25% with a low-e triple vision glazing (U-value 0.17, SHGC 0.22). The daylight glass is a low-e double pane day lighting glazing (U-value 0.27, SHGC 0.38, Vlt 65%). The envelope comprises modular structural insulated panels of 2.5 cm exterior concrete with rigid foam insulation (polyi-socyanurate R-13) and an internal thermal mass of 15 cm interior concrete (see Fig. 6.1b and c).

Fig. 6.1 a Two wings optimized to allow natural lighting and ventilation, RSF, NREL, Golden, Colorado, US. b The South Wing is optimized for a window-to-wall-ratio of 25% and the east glazing surface is minimized. c PV array of mono-crystalline panels of 17% efficiency. d The South Wing is optimized for a window-to-wall-ratio of 25% and the east glazing surface is minimized. e Windows design was optimized to reduce the effective view glass and provide solar protection. f The open space office was optimized for maximum natural lighting and natural cross ventilation

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