The shading chapter from "Tips for Daylighting with Windows"
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"Well-designed sun control and shading devices can dramatically reduce building peak heat gain and cooling requirements and improve the natural lighting quality of building interiors. "
"Can innovative shading solutions successfully balance the tradeoffs between daylight, solar heat gains, discomfort glare, and view?"
"Smart blinds cut power use, but workers find them maddening."
The objective of this study was to explore how calibrated high dynamic range (HDR) images (luminance maps) acquired in real world daylit environments can be used to characterize, evaluate, and compare visual comfort conditions of innovative facade shading and light-redirecting systems.
PNC has opened a zero-energy building that is 57% more efficient than ASHRAE 90.1-2004. Exterior features include shading to control glare from sunlight and photovoltaic solar panels to produce as much electricity as the building consumes annually.
Berkeley Lab WINDOW is a publicly available computer program for calculating total window thermal performance indices (i.e. U-values, solar heat gain coefficients, shading coefficients, and visible transmittances). Berkeley Lab WINDOW provides a versatile heat transfer analysis method consistent with the updated rating procedure developed by the National Fenestration Rating Council (NFRC) that is consistent with the ISO 15099 standard. The program can be used to design and develop new products, to assist educators in teaching heat transfer through windows, and to help public officials in developing building energy codes.
Aids in the design of single- or multizone energy-efficient buildings where the loads are dominated by the dynamic interactions between the building's envelope, its environment, and its occupants. SUNREL is especially well suited for passive solar buildings and includes algorithms for Trombe walls, advanced glazings, schedulable window shading, active-charge/passive-discharge thermal storage, and natural ventilation. The program is a true simulation model based on time steps of one hour or less. The model representation of the building is a thermal network solved with forward finite differencing among other techniques. In addition, a simple graphical interface aids in creating input and viewing output.
Façade designs that deliberately recognize the fundamental synergistic relationships between the façade, lighting, and mechanical systems have the potential to deliver high performance over the life of the building. These "integrated" façade systems represent a key opportunity for commercial buildings to significantly reduce energy and demand, helping to move us toward our goal of net zero energy buildings by 2030.
This 150,000 SF, LEED Gold, Net Zero facility was built on a 17.5 acre site in the city of Irving, Texas. Project cost was $29,610,423, and construction commenced on May 14, 2010. The project opened its doors for school on August 24, 2011. The building is structural steel frame with a brick and metal panel veneer. There are large expanses of windows for daylight harvesting. There are two stories consisting of classrooms, library, cafeteria, auditorium, and gymnasium. The structure fits on a very tight site with building orientation critical to energy conservation; native landscaping and pervious paving round out the exterior. The school uses extensive shading to minimize solar heat gain and incorporates wind turbines as a part of its onsite renewable energy generation portfolio.