Patent ID: 6626661
Filing Date: 2003-09-30
Classification: F23C,F23D

Abstract:
In an ejector having at least one port effective for delivering a flow of fuel into a heating system such that flue gas in said heating system is entrained in said flow of fuel, said flow of fuel having a region of discharge at said port, the improvement comprising said ejector having an aerodynamic shape effective for increasing entrainment of said flue gas in said flow of fuel at said region of discharge wherein, in a cross-sectional plane extending through said port, said aerodynamic shape comprises:a discharge end wherein said port is provided; a major axis extending through said discharge end; a total length along said major axis; and a maximum lateral width which is less than said total length, wherein said maximum lateral width is located at a location of maximum lateral width along said major axis and wherein said aerodynamic shape increases in lateral width in said cross-sectional plane along said major axis from said discharge end to said location of maximum lateral width.