Electrical heater

Details Electrical heater Electrical heater

1998-05-18

2000-02-08

Jeffery, John A.

Electric resistance heating devices

Heating devices

Borehole type

166 60, E21B 715

Patent

active

060235543

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.

REFERENCES:
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patent: 4570715 (1986-02-01), Meurs et al.
patent: 4572299 (1986-02-01), Vanegmond et al.
patent: 4640352 (1987-02-01), Van Meurs et al.
patent: 4886118 (1989-12-01), Van Meurs et al.
patent: 5060287 (1991-10-01), Egmond
patent: 5065818 (1991-11-01), Egmond
patent: 5244310 (1993-09-01), Johnson
patent: 5318116 (1994-06-01), Vinegar et al.
Chemical Engineering Handbook, 5.sup.th Ed., Perry and Chilton, pp. 10-48, 10-52 (1973).

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