Patent ID: 7281379
Filing Date: 2007-10-16
Classification: F01D,F01K,F04D,F05D

Abstract:
1. A method of constructing a turbine for use in a rankine cycle system having in serial flow relationship a pump, a boiler, a turbine and a condenser, comprising the steps of: providing a volute for receiving a vapor medium from the evaporator and for conducting said vapor radially inwardly; providing a plurality of nozzles circumferentially spaced and disposed around the inner periphery of said valuate for receiving a flow of vapor therefrom and conducting it radially inwardly; and providing an impeller disposed radially within said nozzles such that the radial inflow of vapor from said nozzles impinges on a plurality of circumferentially spaced blades of said impeller to cause rotation of said impeller; wherein, the angle of said impeller blades is chosen according to the degree of lift for the intended application, such that for relatively low-lift application, the impeller blades are back swept, for intermediate-lift applications, the blades are radially disposed, and for relatively high-lift applications, the impeller blades are forward swept.