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Energy efficiency
Industry: Energy
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Energy efficiency
Energy factor (EF)
Energy; Energy efficiency
The measure of overall efficiency for a variety of appliances. For water heaters, the energy factor is based on three factors: 1) the recovery efficiency, or how efficiently the heat from the energy ...
Heating seasonal performance factor (HSPF)
Energy; Energy efficiency
The measure of seasonal or annual efficiency of a heat pump operating in the heating mode. It takes into account the variations in temperature that can occur within a season and is the average number ...
Solar air heater
Energy; Energy efficiency
A type of solar thermal system where air is heated in a collector and either transferred directly to the interior space or to a storage medium, such as a rock bin.
Tube-in-plate absorber
Energy; Energy efficiency
A type of solar thermal collector where the heat transfer fluid flows through tubes formed in the absorber plate.
Tube-type collector
Energy; Energy efficiency
A type of solar thermal collector that has tubes (pipes) that the heat transfer fluid flows through that are connected to a flat absorber plate.
Trickle solar collector
Energy; Energy efficiency
A type of solar thermal collector in which a heat transfer fluid drips out of header pipe at the top of the collector, runs down the collector absorber and into a tray at the bottom where it drains ...
Spectrally selective coatings
Energy; Energy efficiency
A type of window glazing films used to block the infrared (heat) portion of the solar spectrum but admit a higher portion of visible light.