High Performing Buildings - Winter 2011 - (Page 8)

BuildinG enveloPe roof Type new built-up roof membrane (Bur) and 4 in. polyisocyanurate over existing 3 in. concrete overall r-value r-23 reflectivity solar reflectance: 0.90, sri: 78% Walls Type existing 4 in. brick veneer, 8 in. concrete, ¾ in. plaster finish overall r-value r-9 glazing percentage 25% Windows existing single-pane glass u-value 1.42 solar Heat gain Coefficient (sHgC) 0.8 Visual Transmittance 0.7 existing double-pane glass u-value 0.6 solar Heat gain Coefficient (sHgC) 0.5 Visual Transmittance 0.7 new double-pane glass u-value 0.29 solar Heat gain Coefficient (sHgC) 0.38 Visual Transmittance 0.7 location latitude 45° 36’ n orientation square footprint the renovation team met regularly with local design review committees to preserve the 1915 neoclassical brick façade. the building was an elementary school until 1969 when Portland state university bought it to provide additional classroom space for its growing student body. back into the building’s heart. As an added bonus, the existing maple hardwood floors only required refinishing for the most part. On the outside, Shattuck Hall’s historic status was assiduously preserved. The design team met regularly with local design review committees to ensure that the original exterior remained intact. adding new life The most obvious new element in Shattuck Hall is the integrated ceiling system of white perforated metal panels that provide radiant heating and cooling, acoustical absorption and reflection of indirect lighting. When the project was completed, it was one of the largest installations of new radiant heating and cooling ceiling panels in the United States. The design team clustered the 3 ft by 5 ft panels to leave gaps for additional features, such as the pendant direct and indirect lighting and ceiling fans that are discreetly suspended between the panels. The ceiling fans provide natural cooling by circulating the outside Winter 2011 air delivered through the ducts. Occupancy, daylighting and CO2 sensors are incorporated into this layout. In the student lounge on the third floor, the design team purposely turned the radiant panels upside down as an educational tool to reveal the copper tubing and fittings that make the system work. The ceiling panels function equally well inverted or upright since the heating (or cooling) surface is still exposed to the space. The tubing in the radiant panels holds heating hot water or chilled water supplied from the campus’ central utility plant via a closed loop. A heat exchanger provides the renovation juxtaposed original and new materials. the visible building systems create a learning lab for students. e n e r G y at a G l a n C e energy use intensity (site) 59.6 kBtu/ft2 (45.87 building, 13.73 process gas) natural gas 13.73 kBtu/ft2 (all natural gas is process load driven) electricity 15.21 kBtu/ft2 steam 26.67 kBtu/ft2 Chilled Water 4.08 kBtu/ft2 Annual source energy 108 kBtu/ft2 Heating degree days 4,490 Cooling degree days 446 8 HigH Performing Buildings Charles ingram Photography the existing glazing, but the team used double glazing in the openings created by the renovation. Singlepane glass remains in the stairwells. The team also reestablished two existing light wells to bring daylight

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

High Performing Buildings - Winter 2011
Commentary
Contents
Portland State's Shattuck Hall
Oberlin College's Adam Joseph Lewis Center
Dell Children's Medical Center
CMTA Office Building
EPA Region 8 Headquarters
Honda's East Liberty, Marysville Auto Plants
Advertisers Index

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