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Underfloor Air: Better Models, Better Performance
June 1, 2008
Researchers have developed a new module for EnergyPlus™ software, a whole-building simulation software tool that designers can use to calculate the energy use of underfloor air distribution systems and compare their performance to conventional overhead air distribution systems.
Content type: Tech Brief | Document ID: CEC-TB-27 | Author: John Sustar
Poudre School District: Geoexchange Heating and Cooling Systems
August 1, 2006
The Poudre School District's facilities encompass 3.7 million square feet and reflect many innovations in energy-efficiency technologies, energy management practices, and renewable energy use.
Content type: Best Practice | Document ID: CEMC-BP-10
Design Guide: How to Make Homes Cool and Efficient
January 26, 2006
Though tools and methods are available for the design of energy-efficient HVAC systems, they are not often used when it comes to production homes. That’s partly because builders of production homes are unaware that these tools exist. In addition, the existing design methodologies are often hard ...
Content type: Tech Brief | Document ID: CEC-TB-22
Large VAVs, Low Loads, and High Performance
December 8, 2005
Many large commercial buildings use variable air volume (VAV) systems to deliver the proper amount of chilled air throughout a building. VAV systems can be very efficient at full load, but large buildings typically spend most of their time operating at part load. At part load, VAV systems often operate ...
Content type: Tech Brief | Document ID: CEC-TB-19
Guide to Optimizing Commercial Kitchen Ventilation
September 22, 2005
Kitchen ventilation systems represent one of the largest uses of energy in a commercial food service facility, accounting for up to 75 percent of the HVAC load. This load itself accounts for about 30 percent of a restaurant’s total energy consumption. Yet many kitchen ventilation systems are poorly ...
Content type: Tech Brief | Document ID: CEC-TB-14
Commercial Buildings Breathe Right with Demand-Controlled Ventilation
July 30, 2005
Demand-controlled ventilation (DCV) systems save energy by using building occupancy indicators that usually measure CO2 levels to regulate the amount of outside air that is drawn in for ventilation. But DCV systems are not widely used, because their cost-effectiveness has not been clearly defined, ...
Content type: Tech Brief | Document ID: CEC-TB-11
Design Guide: Big Savings on Small HVAC Systems
February 17, 2005
Small packaged heating, ventilation, and air-conditioning (HVAC) systems are among the most common HVAC systems for small commercial buildings. These systems, however, are notorious for a host of problems requiring 25 to 35 percent more energy than is necessary to heat, cool, and ventilate California ...
Content type: Tech Brief | Document ID: CEC-TB-2
Boeing: Free Cooling
A Boeing manufacturing facility in Oak Ridge, Tennessee, that has four 700-ton cooling towers to dissipate heat from chiller condensers, has a 400-ton heat load that can be removed if the chilled water supply water is diverted from the chiller to a plate-and-frame heat exchanger.
Content type: Best Practice | Document ID: CEMC-BP-42
Evaporative Cooling, Hybrid Systems
In dry climates, evaporative cooling works very well and results in significant energy savings compared to vapor compression cooling.
Content type: Best Practice | Document ID: CEMC-BP-23
Sandia National Laboratories: Chilled Water Thermal Energy Storage
By constructing a thermal energy storage system for the new Processing and Environmental Technology Laboratory at its site in Albuquerque, New Mexico, Sandia was able to realize significant energy and cost savings.
Content type: Best Practice | Document ID: CEMC-BP-4
