Electromagnetic energy absorber

Claim 1

An energy absorber system for heating fluid therein responsive to impingement by energy within the electromagnetic spectrum, comprising: (a) a rigid outer tube member substantially transparent to predetermined bandwidths within said electromagnetic spectrum, said outer tube member having an outer tube member axis line; (b) a first inner tube member containing said fluid to be heated, being mounted internal said outer tube member substantially coincident with said outer tube member axis line, said outer and first inner tube members being spaced each from the other defining an evacuated chamber therebetween, said first inner tube member having grooves formed on an external surface thereof, and a substantially smooth inner surface for providing substantially linearly directed fluid flow in said axis line direction, said grooves defining an included angle within the approximate range between 3.0° to 30.0°, said grooves having a metallic coating formed thereon adapted to provide a plurality of reflections of said energy within said grooves; and, (c) a second inner tube member mounted internal said first inner tube member, said first and second inner tube members being spaced each from the other, said fluid to be heated entering said energy absorber system within an annular space defined by said substantially smooth inner surface of said first inner tube member and a substantially smooth external surface of said second inner tube member between said first and second inner tube members and exiting through said second inner tube member in a linearly directed manner.