High Performing Buildings - Fall 2009 - (Page 40)

Building team owner state of California, department of general services Program manager 3d/international master Architect Johnson fain Partners Photo © erhard Pfeiffer Architect of record fentress Architects Associate Architect dreyfuss & Blackford Architects general Contractor Hensel Phelps Construction Co. mechanical engineer Critchfield mechanical, inc. electrical engineer rosendin electric, The engineering enterprise energy modeler Taylor engineering structural engineer PK Associates (Paul Koehler Consulting) Civil engineer nolte environmental & leed Consultant smWm landscape Consultant The HlA group lighting design Consultant The engineering enterprise Commissioning smWm The façade of Block 225 resembles a graduation cap. The building houses the California department of education headquarters. sustainable design The design-build team developed 145 strategies for sustainable enhancements, eventually incorporating 110 that provided the best value. A sustainable design begins with a high performance building envelope. A thermoplastic membrane roofing system is made with 100% recyclable PVC-free rubber and reflects over 70% of solar radiation. It lowers roof temperature to 15ºF to 25ºF above the ambient temperature and correspondingly lowers cooling loads. Exterior glazing (sized at roughly a 40% window-to-wall ratio), low-e coatings and tinted glass improve thermal performance while reducing glare. A section of Block 225’s penthouse enclosure features a building-integrated photovoltaic system. The 310 photovoltaic panels are integrated into the exterior envelope design and are capable of generating up to 2% of the building’s power. An underfloor air-distribution (UFAD) system conditions floors two to six. In contrast to the conventional grid of overhead diffusers fa l l 2 0 0 9 A photovoltaic system is integrated into Block 225’s mechanical penthouse enclosure. The 310 photovoltaic panels are capable of generating up to 2% of the building’s power. spaced at relatively large intervals, UFAD systems deliver fresh air through a larger number of floor diffusers strategically placed near each occupant. This system improves thermal comfort while saving energy and generating less demand on building operations and fewer maintenance calls. A raised floor system forms the low pressure underfloor plenum, which supplies air to the floor diffusers. The raised floor system also serves as a cable management raceway and allows for easy maintenance on underfloor fan-coil units. The ease of repositioning floor diffusers reduces life-cycle costs associated with maintenance and reconfiguration of HVAC and electrical services. Block 225 took advantage of these potential savings when the building was reconfigured in 2003 to accommodate 250 additional workers. Improved energy efficiency was another goal of UFAD. In mild western U.S. climates such as Sacramento, UFAD energy savings are usually associated with HigH Performing Buildings Photo © erhard Pfeiffer

Table of Contents for the Digital Edition of High Performing Buildings - Fall 2009

High Performing Buildings - Fall 2009
Contents
Commentary
Kitsap County Administration Building
McDonald's Corporation
Plano Elementary School
California Department of Education
Burns & McDonnell
Advertisers Index

High Performing Buildings - Fall 2009