ASHRAE Journal - March 2011 - 23

2011 technology awards
The David Brower Center, Berkeley, Calif.
commercial buildings, new

Jerry Yang and Akiko Yamazaki Environment and Energy Building, Palo Alto, Calif.
institutional buildings, new

Designer: Peter H. Rumsey, P Integral Group .E., Owner: Equity Community Builders LLC Energy Efficiency. An in-slab radiant heating and cooling system was installed, several different daylighting strategies were used, and a rainwater catchment system provides water for flushing toilets and irrigation. Indoor Air Quality. The building uses an HVAC system that provides 100% outdoor air for the office spaces and the AHUs use MERV 13 filters. I n n o v a t i o n . HVAC system features incorporated into the building design include hydronic in-slab heating and cooling, displacement ventilation, cooling via nighttime purge and slab pre-cool, and building integrated photovoltaics. Operation and Maintenance. Design strategies for energy efficiency include daylighting, VFDs, and a BMS and building dashboard for quick diagnostics of the system. Cost Effectiveness. Energy saving features include natural ventilation, highly efficient HVAC system, daylighting, photovoltaic power generation and solar hot water. Environmental Impact. Fifty percent of the total material is recycled and nontoxic, low VOC and non-urea formaldehyde products were used.

Designer: Amit Khanna, Arup Owner: Stanford University Energy Efficiency. Energy performance was addressed through load reduction, passive operation and efficiency, energy recovery opportunities, self generation, and successful carbon neutral operation through offsets. Indoor Air Quality. The building uses atria to aid stack-driven natural ventilation to condition a large portion of the occupied building. Mechanically ventilated spaces are served via 100% outside air AHUs that incorporate MERV 13 filtration. Innovation. The building is the first of its kind in California to install active chilled beam. Using the building’s natural ventilation design, no mechanical smoke exhaust was installed. Operation and Maintenance. All hydronic

equipment is located indoors in the mechanical room at basement level. Outdoor equipment is located in a semi-covered penthouse providing comfortable working conditions. Cost Effectiveness. The building is expected to recover the marginal costs of its energy design measures in six years, yielding a ±12% ROI. Environmental Impact. The building uses 50% less energy than similar laboratory buildings at Stanford.

second PlAce
1801 McGill College, Montreal
commercial buildings, existing

Designer: Roland Charneux, M.Eng., Pageau Morel & Associates Owner: Redbourne Energy Efficiency. Measures implemented include high efficiency 500 ton (1760 kW) chillers with an IPLV of 0.557 kW/ton, an upgraded BAS, and VFDs on all HVAC floor unit fans and pumps. Indoor Air Quality. Air intakes are located away from potential polluting sources and filter efficiencies are compliant with ASHRAE Standard 52.2, Method of Testing General Ventilation Air Cleaning Devices for Removal Efficiency by Particle Size. March 2011

Innovation. Existing chillers were replaced. Dedicated fans on the hot deck reduce the flow of the common fan, reducing the HVAC noise. Operation and Maintenance. All air-handling units are easily accessible in the mechanical rooms. All mechanical systems are connected to a centralized DDC network with a microcomputer interface. Cost Effectiveness. Capital costs were controlled by providing simple systems that rely on well established, low cost technology. Efforts to control capital costs during the design stage resulted in a project delivered on time and on budget. Environmental Impact. The project generates an annual electricity savings of 5,497,600 kWh, as well as a savings of 110 metric tons of CO2 per year. ASHRAE Journal 23

ASHRAE Journal - March 2011

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