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Radiant heating and cooling originated as separate systems but now share a similar form. Radiant heating has a long history in Asia and Europe. The earliest systems, from as early as 5000 BC, were found in northern China and Korea. Archaeological findings show kang and dikang, heated beds and floors in ancient Chinese homes. Kang originated in ...
In physics, and in particular as measured by radiometry, radiant energy is the energy of electromagnetic [1] and gravitational radiation. As energy, its SI unit is the joule (J). The quantity of radiant energy may be calculated by integrating radiant flux (or power ) with respect to time .
There are two basic types of infrared radiant heaters. Luminous or high intensity; Radiant tube heaters; Radiant tube gas-fired heaters used for industrial and commercial building space heating burn natural gas or propane to heat a steel emitter tube. Gas passing through a control valve flows through a cup burner or a venturi. The combustion ...
Solar energy is the radiant energy from the Sun's light and heat, ... In 1908 Shuman formed the Sun Power Company with the intent of building larger solar power plants.
Radiant Systems was a provider of technology to the hospitality and retail industries that was acquired by NCR Corporation in 2011. Radiant was based in Atlanta, Georgia.In its last financial report as a public company, Radiant reported revenues of $90 million and net income of $14 million in the six months ended 30 June 2011.
In June 2009, NRG Energy purchased Reliant Energy's retail electricity business. At the time, Reliant had 1.8 million customers and was the second largest electric provider in Texas. [5] The name Reliant Energy was retained and the surviving wholesale business was renamed RRI Energy, which was retired in 2012 after additional NRG acquisitions.
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