METHOD AND SYSTEM FOR STEAM QUALITY MONITORING
First Claim
1. A method of determining a steam quality of a wet steam located in an interior of a steam turbine, the method comprising:
- emitting from an optical probe a plurality of wavelengths through the wet steam;
measuring with the optical probe a wet steam intensity corresponding to each of the plurality of wavelengths emitted through the wet steam;
determining an intensity ratio vector by dividing the wet steam intensity by a corresponding dry steam intensity for each of the plurality of wavelengths;
successively applying scaling factors to the intensity ratio vector to obtain a scaled intensity ratio vector;
calculating a suitable value for each of the scaling factors to obtain a plurality of residuals;
determining a minimum residual of the plurality of residuals;
determining a droplet size distribution by calculating the droplet number density corresponding to the minimum residual; and
determining the steam quality based on the droplet size distribution.
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Accused Products
Abstract
A method of determining a steam quality of a wet steam located in an interior of a steam turbine includes emitting from an optical probe a plurality of wavelengths through the wet steam, measuring with the optical probe a wet steam intensity corresponding to each of the plurality of wavelengths emitted through the wet steam, determining an intensity ratio vector by dividing the wet steam intensity by a corresponding dry steam intensity for each of the plurality of wavelengths, successively applying scaling factors to the intensity ratio vector to obtain a scaled intensity ratio vector, calculating a suitable value for each of the scaling factors to obtain a plurality of residuals, determining a minimum residual of the plurality of residuals, determining a droplet size distribution by calculating the droplet number density corresponding to the minimum residual, and determining the steam quality based on the droplet size distribution.
18 Citations
20 Claims
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1. A method of determining a steam quality of a wet steam located in an interior of a steam turbine, the method comprising:
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emitting from an optical probe a plurality of wavelengths through the wet steam; measuring with the optical probe a wet steam intensity corresponding to each of the plurality of wavelengths emitted through the wet steam; determining an intensity ratio vector by dividing the wet steam intensity by a corresponding dry steam intensity for each of the plurality of wavelengths; successively applying scaling factors to the intensity ratio vector to obtain a scaled intensity ratio vector; calculating a suitable value for each of the scaling factors to obtain a plurality of residuals; determining a minimum residual of the plurality of residuals; determining a droplet size distribution by calculating the droplet number density corresponding to the minimum residual; and determining the steam quality based on the droplet size distribution. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. One or more non-transitory tangible machine-readable media comprising executable instructions, wherein the executable instructions, when executed by a processor, cause the processor to perform acts comprising:
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measuring with an optical probe a wet steam intensity corresponding to each of a plurality of wavelengths emitted through a wet steam; determining an intensity ratio vector by dividing the wet steam intensity by a corresponding dry steam intensity for each of the plurality of wavelengths; successively applying scaling factors to the intensity ratio vector to obtain a scaled intensity ratio vector; calculating a suitable value for each of the scaling factors to obtain a plurality of residuals; determining a minimum residual of the plurality of residuals; determining a droplet size distribution by calculating the droplet number density corresponding to the minimum residual; and determining a steam quality based on the droplet size distribution. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A steam quality monitoring system, comprising:
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an optical emitter configured to emit light at a plurality of wavelengths; an optical detector configured to detect light at the plurality of wavelengths; a processor coupled to the optical emitter and the optical detector, and configured to execute instructions stored in a memory or storage device, wherein the instructions, when executed by the processor, cause the processor to perform acts comprising; detecting with the optical detector a wet steam intensity corresponding to each of the plurality of wavelengths emitted by the optical emitter through the wet steam; determining an intensity ratio vector by dividing the wet steam intensity by a corresponding dry steam intensity for each of the plurality of wavelengths; successively applying scaling factors to the intensity ratio vector to obtain a scaled intensity ratio vector; calculating a suitable value for each of the scaling factors to obtain a plurality of residuals; determining a minimum residual of the plurality of residuals; determining a droplet size distribution by calculating the droplet number density corresponding to the minimum residual; and determining a steam quality based on the droplet size distribution. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification