High Performing Buildings - Fall 2010 - (Page 7)

c A s e s t u d y i d e A s Z 2 d e s i g n F A c i l i t y A t the first conceptual design charrette, the design team decided to target a “Z2” goal — zero energy and zero carbon — to advance the state of green building and to showcase the low energy electrical and lighting design skills of the client. For the project to be replicable, the team wanted a low energy building that uses existing technology at a reasonable cost premium. By maximizing efficiency of building systems before sizing the photovoltaic arrays to cover the remaining loads, the costs were kept to a minimum. opposite Building-integrated photovoltaics are incorporated into the canopy and the single-ply roofing membrane. using an integrated system rather than panels eliminated the need for panel structural supports, which would have required approximately 200 roof penetrations. in 2009, the photovoltaic system generated more electricity than the office consumed. Below High efficiency fluorescent fixtures with t8 lamps in the main studio are mostly used at night. the building serves as a living lab, testing three types of ballasts that are switched or dimmed by daylight and occupancy sensors. The team needed a fully integrated design process, in which the different design disciplines and the general contractor make key decisions together to optimize the building as an integrated system. For example, carefully designed sun shading and state-of-the-art glazing would allow the team to make many incisions into the roof and concrete walls to harvest more daylight. This would reduce the need for electric lighting and its attendant energy consumption, while also providing outside views for building occupants. Team members collaborated on specifications for features such as skylights, accounting for their impacts on not just the daylighting design, but on the architectural, lighting, electrical and HVAC design. The result is a sophisticated design that uses simple controls to maximize energy performance while providing an excellent working environment within a reasonable budget. The integrated design process emphasizes the importance of getting it right the first B u i l d i n g At A g l A n c e name ideAs Z2 design facility location san Jose, Calif. owner integrated design Associates (ideAs) When Built mid-1960s (originally a bank branch office) major renovation 2007 renovation scope skylights, window walls, upgraded insulation and glazing, high-efficiency HVAC system, high-efficiency lighting and office equipment, rooftop and canopy photovoltaic system, monitoring equipment Principal use Commercial office occupants 15 gross square footage 7,000 Total renovation Cost $2,521,097 Cost Per square foot $360 distinctions/Awards 2010 AsHrAe Technology Award, first Place: Commercial existing Buildings Virtual Tour www.z2building.com time, since few opportunities exist to make substitutions or to eliminate parts of the design without affecting the whole system. IDeAs Z2 Design Facility was ready for occupation in late 2007. Today, with nearly three years of energy and occupant comfort data collected, the project demonstrates the viability of net zero energy buildings. This daylit, wellventilated low-rise with no gas connection is carbon neutral, with carbon offsets purchased to cover the embodied carbon of the building materials used in the renovation. At less than one-fourth of the energy use of a typical office,1 IDeAs Z2 is one of the most efficient commercial office buildings in the Performing Buildings 7 © david Wakely fa l l 2 0 1 0 HigH http://www.z2building.com

Table of Contents for the Digital Edition of High Performing Buildings - Fall 2010

High Performing Buildings - Fall 2010
Table of Contents
IDeAs Z2 Design Facility
Lighting Design Alliance
Manassas Park Elementary School and Prekindergarten
FC Gulf Freeway Office Building
Capturing Condensate
National Australian Built Environment Rating System
Tyson Living Learning Center

High Performing Buildings - Fall 2010

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