High Performing Buildings - Summer 2011 - (Page 10)

Courtesy: Tim griffith e n e r G y at a G l a n c e Annual energy use intensity (site) 127.35 kBtu/ft2 electricity 55.9 kBtu/ft2 steam 36.7 kBtu/ft2 district Cooling 34.4 kBtu/ft2 renewable energy 0.35 kBtu/ft2 Annual source energy n/A* Annual energy Cost index (eCi) $2.90/ft2 Annual net energy use intensity 126.65 kBtu/ft2 savings vs. standard 90.1-2004 design Building (inclusive of nonregulated process loads) 44% Heating degree days 2,476 Cooling degree days 511 * stanford receives its energy (power, chilled water and steam) from a cogeneration plant, which runs on natural gas. W at e r at a G l a n c e Above Daylighting complements electric lighting within the atria. These common open spaces allow for impromptu meetings between faculty and students and between researchers from various disciplines. Above right During hotter months building windows automatically open at night, drawing in the cool air. Automated louvers at the skylight help flush out warm air through the building’s four atria. fixtures: 110,000 gallons (95% metered savings) chosen as a result of detailed wind studies. The overall system static pressure was reduced by 0.68 in. w.g. Step 4: Recover Energy Heat Pipe Laboratory exhaust air is used to precondition incoming air. By using a physically separated passive solution that does not depend on moving parts, no laboratory air crosscontamination can occur and maintenance is significantly reduced. 10 Step 5: Generate Energy monocrystalline PV Y2E2 features three photovoltaic systems (thin film, mono-crystalline, and polycrystalline) so students can compare and contrast performance as part of their education, allowing the building not only to conserve and inspire, but teach as well. Step 6: Offset Community reinvestment Full site generation was not feasible for a laboratory building. However, the desire to achieve carbon neutral operation has prompted the campus to discuss further opportunities through purchased offsets and community reinvestment. summer 2011 irrigation: 0 gallons (100% savings) indirect Process: 1.4 million gallons (55% savings) Water Stanford is situated in a Mediterranean climate with frequent water shortages, and the university recognizes that water would soon be a limiting factor in the campus’s continued development. Therefore, Stanford chose to aggressively pursue water efficiency and alternative water sources. To address Y2E2’s water performance goals meaningfully, the team took a similar step-by-step approach to that for energy. Steps HigH Performing Buildings

Table of Contents for the Digital Edition of High Performing Buildings - Summer 2011

Commentary
Contents
Stanford University's Y2E2
The Christman Building
The Gettysburg National Military Park Museum and Visitor Center
Cannon Design Regional Offices, Power House
Great River Energy Headquarters
Letters
Products
Advertisers Index

High Performing Buildings - Summer 2011