ASHRAE Journal - March 2011 - 30

honorable mention
Indoor Air Quality. By default, this project automatically exOperation and Maintenance. The installed BAS enables the city

ceeds the numbers required in the Ventilation Rate Procedure of Standard 62.1 by more than 30%. Innovation. A key innovation for achieving EER was placing the condenser in the saturated exhaust side of the indirect evaporative cooler. Operation and Maintenance. The evaporative condenser unit uses a chemical free water treatment system that requires very low maintenance, and also reduces blow down of water. Cost Effectiveness. The estimated simple payback for the systems is approximately four years. Environmental Impact. Using evaporative cooling for a significant portion of the cooling reduces energy consumption.
Mesa Community College Physical Sciences Building, Mesa, Ariz.
institutional buildings, new

to monitor the system remotely through a WAN.
Cost Effectiveness. The simple payback for the building sys-

tems is 17 years.
Environmental Impact. The air handlers have been specified

with R-410A.
Boeing 18-25, Seattle
commercial buildings, existing

Designer: Michel Sotura, P Coffman Engineers .E., Owner: The Boeing Company Energy Efficiency. A dual duct, dual fan, variable volume system is used, reducing the amount of reheat energy needed by using the heat that is already present in the return air system. Indoor Air Quality. Ventilation air was increased by providing a minimum of 31% of outside air at the air handler cold deck. Innovation. Replacement of the hot water baseboards with the dual duct air distribution system can provide free cooling and free heating for many hours. Operation and Maintenance. A measurement and verification plan was put in place to track energy use for the mechanical and electrical systems. Cost Effectiveness. No heating piping was used to serve the terminal zones, which resulted in substantial installation savings. Environmental Impact. All asbestos contained within the existing HVAC piping insulation was removed. Regina Provincial Corrections Centre, Regina, SK, Canada
institutional buildings, new

Designer: Robert H. Thompson, P SmithGroup, Inc. .E., Owner: Maricopa Community Colleges Energy Efficiency. All AHUs use VSDs to improve energy ef-

ficiency, with VAV terminal units provided throughout the building. Indoor Air Quality. The college implemented a green cleaning program, which standardizes green cleaning products and procedures throughout the campus. Innovation. Labs with more than one fume hood use sash position sensors to reduce airflows to minimum ventilation rates when the hoods are not in use. Operation and Maintenance. A systems manual was prepared for the project that provides full operating information to the staff to understand and optimally operate the commissioned systems. Cost Effectiveness. The project used BIM in design and during construction to coordinate decisions prior to installation. The process allowed for off-site prefabrication and minimizing of construction waste. Environmental Impact. Recycling efforts diverted more than 77% of the construction waste from landfills. More than 37% of the materials used in construction contained recycled content.
Valley Hi North Laguna Library, Sacramento, Calif.
institutional buildings, new

Designer: Heric D. Holmes, P MacPherson Engineering .E., Owner: Government Services Energy Efficiency. VFDs were installed on the supply heating

Designer: Jeffrey P Blaevoet, P Guttman & Blaevoet Consult. .E., ing Engineers Owner: City of Sacramento Energy Efficiency. Goals for the building included daylight har-

vesting, passive cooling and a rainwater catchment system.
Indoor Air Quality. The design used the Standard 62.1-2004

Ventilation Rate Procedure to determine the outdoor ventilation rates of each air handler. Innovation. HVAC innovations included the use of a displacement ventilation system, reducing the requirement for expensive raised-floor systems, while retaining the efficiency benefits of a UFAD system.
30 ASHRAE Journal

pumps. The pump energy was reduced by using large DTs across the heating coils and plate exchangers. Indoor Air Quality. Cells are directly exhausted through the plate to plate exchanger. A plate to plate heat exchanger located in the vent unit was chosen instead of an enthalpy wheel because pepper spray and tear gas are used in emergency situations. Innovation. The major innovation for this project was the use of cast on-site radiant heating and cooling wall systems. Operation and Maintenance. A BACnet BMS complete with Web-enabled remote access and the ability to log all points in the building was installed and provides maintenance warnings for filter changes and all equipment warnings. Cost Effectiveness. Cost of the project was on time and on budget due to the use of integrated wall systems. Environmental Impact. CO2 was reduced by 740 tons per year and all of the cooling equipment in the facility uses nonCHFC refrigerant.
ashrae.org March 2011

ASHRAE Journal - March 2011

Table of Contents for the Digital Edition of ASHRAE Journal - March 2011