Gas Engine Driven Air Conditioners
GEDACs combine standard air conditioning technology with natural gas driven engines. The use of natural gas for air conditioning purposes helps reduce electrical transmission capacity problems and provide increased energy conservation as space cooling is the major factor in electric energy consumption and peak electrical demand for military facilities.
Four buildings on Davis-Monthan use GEDACs to air condition and heat their space. These units shave peak electrical demand up to 50 kW total a month or about $1,000 a month.
Leadership in Energy and Environmental Design Certification
LEED standards are used on every new building constructed on D-M. These principles help promote resource efficiency, healthy indoor environmental quality, the latest energy systems, use of recycled materials and innovative design principles. Thirteen Military Construction Projects have been registered to be certified as LEED Silver level. In order to be certified at the Silver level a building must receive at least 50 points, earned from a number of different areas that adhere to LEED standards. Some upcoming LEED projects at D-M include the simulator facilities, AMARG infrastructure, and the visitor quarters on base.
Boiler Projects
For winter months, D-M is currently replacing 42 boilers with more efficient boilers that will save an estimated 20 percent of base-wide natural gas consumption and over $350,000 a year in utilities costs. Another project planned for late 2011 will replace boilers at 11 more buildings.
Future Projects
To accomplish Air Force renewable energy goals, the DM Energy Team is continuously generating new green ideas on base. Some of the proposed projects are described below.
During the blistering summer months, Thermal Storage Plants provide one option for cooling buildings on base. Don't be fooled by the word "thermal" though, these plants produce ice during the night to help cool during the day. This innovative technology can remove 1,200 kW significantly reducing peak energy costs.
At the youth center, the DM Energy Team is partnering with NASA and NAVFAC to construct a solar air conditioner at no cost for D-M. Construction is set to begin in February 2011 and this project is expected to provide 90 percent reduction in energy use from the current system.
D-M also partners with the University of Arizona's School of Architecture Graudate Program to perform energy audits on base. . The "House Energy Doctors", as they call themselves, will use their energy modeling lab to identify energy saving opportunities. They have already finished a project at the BX and have more plans for semesters to come.