High Performing Buildings - Summer 2012 - (Page 34)

E n E r g y at a g l a n c E Annual Energy Use Intensity (Site) 30 kBtu/ft2 Electricity 30 kBtu/ft2 Annual Source Energy 100 kBtu/ft2* Annual Energy Cost Index (ECI) $0.81/ft2 Savings vs. Standard 90.1-1999 Design Building 56% Heating Degree Days 5,620 at base 65°F for 2011 Cooling Degree Days 4 at base 65°F for 2011 *National source ratio used. However, the ratio is high for Port Townsend because three-fourths of Washington State’s electricity is generated from hydropower. To reduce fan energy, radiant floor heating is provided in ground floor spaces, while radiator heating serves the upper floor office areas. Heat recovery ventilation is provided for the retail space and © Nic Lehoux for the Miller Hull Partnership © Nic Lehoux for the Miller Hull Partnership operable windows are relied upon for ventilation and natural cooling in the offices. The Boat Shop is heated to only 60°F via a radiant floor since it is typically operated with the doors open during the swing season. Door switches turn off heating when doors are opened. Rooms with ducted systems are provided with heating and cooling and outside air economizer mixing boxes. The classrooms in the Education Building are tied to door switches that disable the HVAC system when rooms are unoccupied (doors are open). The project also uses variable speed pumps, demand control ventilation (DCV), and natural ventilation for additional energy savings. The buildings’ hybrid active/passive ventilation system Top Continuous bands of clerestories run the length of both buildings, providing even, natural light throughout the spaces. Controls monitor available daylight, and arti cial lighting is seldom on throughout most of the buildings. Above Boatbuilding functions spill out of the building into the right-of-way and onto the public plaza. Left Designed as an extension of the public plaza, the sidewalks and drive-aisles of the adjacent street right-of-ways close to vehicles during events, serving as event space, and a “Bike Corral.” 34 HIGH PERFORMING BUILDINGS Summer 2012

Table of Contents for the Digital Edition of High Performing Buildings - Summer 2012

High Performing Buildings - Summer 2012
Commentary
Contents
High Tech High Chula Vista
Kiowa County Schools
Northwest Maritime Center
La Reunion’s ENERPOS
Wilfred Uytengsu Sr. Center
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High Performing Buildings - Summer 2012