Electrical heater
AssigneeShell Oil Company
InventorsHarold J. Vinegar, Eric De Rouffignac
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Abstract
A heater is disclosed, the heater comprising: a heating element effective to generate radiant energy; a casing surrounding the heating element separated from the heating element; and support material between the casing and the heating element wherein the support material comprises a granular solid material that is translucent to radiant energy in the peak wavelength of energy which is radiated by the heating element at operating temperatures. The translucency of the support material is such that at least 50% of the radiant energy emitted by the heating element is radiated to the casing.
Claims10
A heater comprising:
- a heating element effective to generate radiant energy;
- a casing surrounding the heating element separated from the heating element;
- and
- support material between the casing and the heating element wherein the support material comprises a granular solid material that is translucent to radiant energy in the peak wavelength of energy which is radiated by the heating element at operating temperatures wherein at least 50% of the radiant energy emitted by the heating element is radiated directly to the casing.
Dependencies are inferred from the claim text.