measures and technologies. Reading them will help you understand how they work, how they save energy and whether or not they may be appropriate to include in your building design or retrofit.
Aerogel insulation properties demo. NASA/JPL-Caltech
- Technology Overview: Thermal Energy Storage (TES)
in order to shift electrical demand to off-peak hours. Typical thermal energy storage systems work in conjunction with air distribution systems and rely on water chillers or ice-making machines to produce cooling capacity.
- Technology Overview: Chilled Water TES Systems
Chilled water systems are appealing for many applications because they are less complex and have lower operating costs than alternative technologies, but require more physical space as they offer lower storage density than other options.
- Technology Overview: Ice Storage TES Systems
as a storage medium. Ice storage systems are less often used than chilled water systems due to being more complex and less efficient, but offer the densest storage capacity. Ice storage tanks are about 75% smaller than chilled water tanks.
- Technology Overview: Rooftop Unit TES Systems
, to shift energy use to off-peak periods. RTU-TES systems can be designed for new construction or retrofit applications.
- Technology Overview: Eutectic Salts TES Systems
Eutectic salts have a higher freezing point temperature than water. The phase change material is encapsulated in plastic containers that are stacked in the storage tank as water is circulated around them.
- Technology Overview: Daylighting
devices to distribute
natural light inside a building. Intended to provide amenable work
and living environments, daylighting can also significantly reduce
the need for electric lighting.
- Technology Overview: Multi-Level Switching
in a space to be switched off while maintaining a reasonably uniform distribution of light suitable for work.
- Technology Overview: High Efficiency HVAC Equipment
is heating and cooling equipment that meets a
higher efficiency rating than federal appliance standards
- Technology Overview: Variable Frequency Drives
by controlling motor speed and reducing
it to match the actual load.
- Technology Overview: Occupancy Sensors
to determine when a space is occupied. They
can switch off lights, HVAC equipment, or appliances when the space
- Technology Overview: Evaporative Pre-coolers
by cooling the air that surrounds air conditioner condensers.
- Technology Overview: Economizers
by allowing cool outside air into
buildings, which reduces or eliminates the need for mechanical
- Technology Overview: Cool Roofs
of reflectance and emittance properties that keep them cool on hot
days. They reduce the cooling loads of buildings, especially during