High Performing Buildings - Summer 2008 - (Page 8)

In the lecture hall, angled ceiling panels reflect daylight toward the student seating area and away from the projection area. have become strong proponents of the approach based upon the resulting performance. The arrangement allows the highest portion of the window to be the ﬁrst portion to let in daylight and the last to be closed to daylight. The fabric is a bronze color with perforations that allow 5% of daylight to penetrate, even when the shades are closed. The color and perforations also allow some degree of view through the shades and enough light to maneuver within the room even with the shades closed and the lights off. Thermal Mass Thermal mass and ceiling fans combine to expand the comfort range of building occupants by ﬁve degrees. Increasing the thickness of the concrete topping slab by 2 in. at each ﬂoor level and adding the same con8 HIGH PERFORMING crete topping to the roof assembly achieved the thermal mass in this steel-framed building. The approach provided a net savings of $1 million over a concrete structure. During the design process, an analysis of how much thermal mass would be required for the building to perform at the projected level showed a high level of impact for the ﬁrst 2 in. of additional concrete. The impact became more modest as additional concrete was added beyond that level. This amount was required for the building to perform and could be supported by the steel structure that had been designed without increasing the steel member sizes. Quarry tile and linoleum ﬂoors facilitate thermal transfer between ventilation and night ﬂush air and thermal mass. Ceiling fans help Summer 2008 achieve comfort for occupants. Operable windows are implemented throughout the building. Night Flush Cycle A night ﬂush cycle combined with thermal mass cools the building for all but a few hours of the year: four hours per year in the 60-person case study rooms, and 93 hours per year in the 290-person auditorium. In each case study room, ventilation air is drawn through louvers past a control damper, through a raised ﬂoor plenum, between risers into the room and past occupants. The air vents high on the presentation wall to corridor ducts and then the atrium. Although the building includes an active cooling system as a backup to these passive cooling strategies, it is reduced in size and used for few hours per year. BUILDINGS Photo © Rick Keating

Table of Contents for the Digital Edition of High Performing Buildings - Summer 2008

High Performing Buildings - Summer 2008
ebm-papst Inc.
Contents
Lillis Business Complex
LG Electronics
Tate Access Floors, Inc.
Science and Technology Facility
Daikin AC (Americas)
Greenheck
Rainwater: The Untapped Resource
Ruskin
Chillventa
SEMCO
North Exelon Pavilions
Energy Conservatory
AHR Expo
Florida Solar Energy Center
EMGP 270
The Fulton Companies
The Solaire
3M Energy & Advanced Materials
Building Owners & Managers Institute
Great Seneca Creek Elementary School
Price
International Facility Management Association
Advertisers Index
U.S. Green Building Council
AAON, Inc.

High Performing Buildings - Summer 2008