| 摘要 |
The variable speed condensing steam turbine is a simplified and effective steam expander which is built mainly of simple, low-cost sheet metal parts and is designed to provide a variable speed/torque output range. The turbine concept is based on the past Tesla turbine principle of equally spaced rotor discs to provide a long helical path for steam expansion with high operating efficiency and minimum friction. Unlike the cylindrical Tesla turbine this unit is in conical form with uniformly varying diameter discs used to provide a variable speed/torque power output range. A further purpose of having a uniform conical housing and uniformly increasing diameter discs is to achieve maximum steam expansion which will lead to rapid steam condensation, or a precondensation condition for the expended steam passing through the conical turbine. A fuel conservation feature of the condensing turbine is a provision for separating hydrogen gas from a portion of the expanded/expended steam which will be conducted to the external fuel burner of the vapor generator, as part of the complete power system.
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