Extraction Two-Stage Turbine Optimization

Extraction turbines are two-stage turbines that can provide steam at a pressure between that of the supply and that of the exhaust, while meeting their 

The addition of a pressure-controlled let-down line increases the speed of response, while the flow controller minimizes the energy waste through that line. 

The demand for LP steam can be more or less than the availability of the extraction steam. When the available extraction steam is insufficient, a pressure-controlled bypass valve is used to supplement the LP and maintain the pressure in the low-pressure header. If the interstage steam supply is in excess of the low-pressure header s requirements, it would be wasteful if the excess steam was condensed or vented, and therefore, the pressure set point of the HP pressure controller is reduced. 

Post-Oil Energy Technology After the Age of Fossil Fuels 

This control system is both flexible and optimized FC-1 keeps the bypass flow to a minimum, while FC-3 reduces the LPS demand if it exceeds the work load on the turbine, and FC-3 makes more steam energy available to the turbine if the LPS demand is below the workload. 

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