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US 8,857,455 B2Granted
Method for regulating a valve
AssigneeSiemens Aktiengesellschaft
InventorsStephan Minuth, Stefan Riemann, Klaus Rothe
Life of this patent
Estimating the term…
Abstract
A method for regulating a steam bypass valve is provided. The bypass valve is arranged in a steam line and the steam line includes a device for spraying water. The equation, t Rest , 0 = FB max m . W , SOLL - m . W , IST is used to determine when to close the steam bypass valve. The steam bypass value is closed when tRest,0 is smaller than a value Δt. An actual volume of water {dot over (m)}W,IST, a desired volume of water {dot over (m)}W,SOLL and a maximum water-volume deficiency FBmax are used in the equation.
Claims7
A method for regulating a valve, comprising:
- arranging the valve in a steam line of a bypass station wherein the steam line has a device for spraying water into the bypass station;
- determining an actual volume of water {dot over (m)}W,IST, a desired volume of water {dot over (m)}W,SOLL and a maximum water-volume deficiency FBmax;
- forming a quotient, tRest,0 between the maximum water-volume deficiency FBmax and the difference of the desired volume of water {dot over (m)}W,SOLL and the actual volume of water {dot over (m)}W,IST according to the equation;
- t
- Rest
- ,
- 0
- =
- FB
- max
- m
- .
- W
- ,
- SOLL
- -
- m
- .
- W
- ,
- IST
- and
- closing the valve when tRest,0 is smaller than a value Δt
- wherein the maximum water-volume deficiency FBmax is formed from a multiplication between a maximum volume of spray water {dot over (m)}W,max and a maximum time without water spraying tmax,0 according to the equation FBmax={dot over (m)}W,max×tmax,0.
21 more elements
Dependencies are inferred from the claim text.