Heat recovery high intensity discharge lamp constructions
AssigneeGeneral Electric Company
InventorsHimanshu B. Vakil, Seth D. Silverstein
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Abstract
Composite high intensity discharge lamp constructions are described adapted for use in the recovery, in the form of heat, of energy in the non-visible frequencies emitted by such lamps. A transparent sleeve is disposed around and spaced from the lamp body being directly or indirectly connected thereto. Air passing between the sleeve and the lamp is brought into intimate heat transfer contact with both the outer surface of the lamp outer envelope and the inner surface of the sleeve.
Claims11
A composite high intensity discharge lamp structure adapted for the recovery of heat emitted by such lamps comprising in combination a transparent longitudinally extending envelope formed with a closed end, means for mounting said lamp affixed to and closing said envelope at the opposite end theeof, arc tube support means mounted within said envelope, an arc tube affixed thereto extending generally axially of said envelope and a transparent sleeve mounted outside of and connected to said envelope, said sleeve being open at both ends and being spaced from said envelope along the coextensive lengths thereof, the volume between said sleeve and said envelope defining at least in part a zone providing a large convective heat transfer coefficient extending around said envelope opposite said arc tube, said zone having a thickness in the range of between 1 mm. and 2 cm. and a length equal to at least about 10 percent of the length of said arc tube.
Dependencies are inferred from the claim text.