radiant efficiency


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radiant efficiency

n
(Units) the ratio of the power emitted by a source of radiation to the power consumed by it. Symbol: ηe
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Low intensity infrared heaters have an average radiant efficiency from 35 to 55% and high intensity infrared heaters have an efficiency from 55% to 80% (ASHRAE 2008, Systems and Equipment).
Available in both natural or propane gas, the CE-approved ADU/ADL advantage series high efficiency radiant tube heaters have a higher radiant efficiency rating than comparable heaters for more efficient, comfortable and cost saving heating.
The LTU130 U-Tube heaters, rated at up to 130,000 btu/hour each, are said to incorporate features not found on most competitive units, including a self-contained draft inducer, which pulls the products of combustion through the combustion chamber for increased radiant efficiency and safety.
The heaters' high emissivity ensures radiant efficiency in a range of applications, including plastics, coatings, thermoforming and OEM oven construction.
The ETU200 Space-Ray tube heater features a self-contained draft inducer, which pulls products of combustion through the combustion chamber for increased radiant efficiency and safety.
The silicon carbide heater operates at about 1250 F with a radiant efficiency of 65-70%, lower than the 1700 F operating temperature and nearly 80% efficiency of a quartz panel.
The greater radiant efficiency of the U-shaped tubes provides the needed radiant energy to warm the floor.