| 摘要 |
The present invention is a hydrocarbon fired thermophotovoltaic furnace having a non-fused silica tube. In a preferred embodiment, the furnace has an infrared emitter tube having a top end and a bottom end and a substantially transparent non-fused silica window tube having a closed top end. The window tube is positioned concentrically around the infrared emitter tube, and the infrared emitter tube is in fluid communication with the window tube. The window tube is preferably composed of Lucalox (alumina or Chromolux), magnesia, yterria, titania, spinel, stablized zirconia or yterria alumina garnet. In another preferred embodiment, the furnace has a radiator tube having a top end and a bottom end and an infrared emitter tube having a closed top end. The infrared emitter tube is positioned concentrically around the radiator tube, and the radiator tube is in fluid communication with the infrared emitter tube. Fluid flows from the inner tube to the outer tube. Also disclosed is a fuel injector having a cup member press fit to the upper end of a hollow tube. An annular cup is positioned adjacent a top end of the cup member and a cap is positioned adjacent the annular cup opposite the cup member. A jet shim is positioned between the annular cup and the cap. The jet shim has a plurality of etched radial channels formed therein. Gaseous fuel flows through the etched radial channels between a flat upper rim of the cup member and a flat lower surface of the cap. The shim also has an inner hub held between a flat inner surface of the cup member and the flat lower surface of the cap.
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