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Equivalence of direct radiation (EDR) is a standardized comparison method for estimating the output ability of space-heating radiators and convectors.. Measured in square feet, the reference standard for EDR is the mattress radiator [1] invented by Stephen J. Gold in the mid 19th century.
A radiator is a device that transfers heat to a medium primarily through thermal radiation.In practice, the term radiator is often applied to any number of devices in which a fluid circulates through exposed pipes (often with fins or other means of increasing surface area), notwithstanding that such devices tend to transfer heat mainly by convection and might logically be called convectors.
Founded in 1936 as the Steel Radiators company in Southall, London. [1] [2] It now makes products for central heating systems. It opened a factory in Dalbeattie, Dumfries and Galloway, in 1961, which closed in 1998. [3] [4]
Most radiators are therefore given surface finishes with high IR emittance (ε > 0.8) to maximize heat rejection and low solar absorption (α < 0.2) to limit heat loads from the sun. High-temperature radiators are preferred for better efficiency and size reduction considerations, however, fluid property and droplet cloud property are additional ...
The Pierce Steam Heating Company was founded in 1881 by John B. Pierce and Joseph Bond in Buffalo. [3] The Standard Radiator Company (Buffalo) was established in 1892 by Nelson Holland. [4] Advertisement for boilers from the American Radiator Company, illustrated by Ralph Barton, published in The Elks Magazine, May 1924
In a steam heating system, each room is equipped with a radiator which is connected to a source of low-pressure steam (a boiler). Steam entering the radiator condenses and gives up its latent heat, returning to liquid water. The radiator in turn heats the air of the room, and provides some direct radiant heat. The condensate water returns to ...