F - Mech Eng,Light,Heat,Weapons – 28 – D
Patent
F - Mech Eng,Light,Heat,Weapons
28
D
257/15
F28D 7/00 (2006.01) F22B 37/26 (2006.01) F22B 37/74 (2006.01) F22G 1/00 (2006.01) F28F 19/00 (2006.01) F28F 27/02 (2006.01)
Patent
CA 1136119
17TU-2792 SHELL AND TUBE MOISTURE SEPARATOR REHEATER WITH OUTLET ORIFICING Abstract of the Disclosure Shell and tube heat exchangers achieve greater efficiency and substantially eliminate instabilities due to condensate subcooling by the location of flow restricting orifices at the outlet ends of heat exchanger tubes adjacent to the outlet header. Outlet orificing preferentially passes liquid condensate so as to prevent accumulation of condensate within the tubes and permits a higher tubeside temperature, even in themost heavily loaded tubes. In a two-pass configuration all tubes are outlet orificed. In a four-pass system, the most heavily loaded tubes (second pass) are orificed, although all tubes may be outlet orificed. Outlet orificing may be used in conjunction with inlet orificing which is used to provide greatest mass flow of tubeside steam to most heavily loaded tubes. Outlet orificing may be used in connection with vertical or horizontal U tube configura- tions. Preferred embodiment is utilized in a moisture separator reheater for use with steam turbines to reheat steam for later turbine stages. Orifices are restricted diameter apertured plugs in heat exchanger tubes located within the tubesheet adjacent to the header.
365739
Company General Electric
Eckersley Raymond A.
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