General Electric Company

Chayan Mitra

Rachit Sharma

Vinayak Tilak

Sandip Maity

Ayan Banerjee

Eric YuHang Fung

Vivek Venugopal Badami

Vinod Kumar

Achalesh Kumar Pandey

Vinay Bhaskar Jammu

Scott Mordin Hoyte

Ravi Yoganatha Babu

Kunal Ravindra Goray

Sheri George

Mark Allen Woodmansee

Bhasker Rao Keely

Munish Vishwas Inamdar

Anish Bekal

Steven Francis LeBoeuf

Narendra Digamber Joshi

Rahul Jaikaran Chillar

Kanakasabapathi Subramanian

Ahmed Elasser

Samhita Dasgupta

Julio Enrique Mestroni

Jeffrey Bernard Fortin

Steven Alfred Tysoe

Gordon Raymond Smith

Anthony Kowal

David Kelly Moyeda

Samhitha Palanganda Poonacha

Chong Tao

Ramakrishna Rao

Venkatarao Ryali

Xiaoyong Liu

Jeffrey Bernard Fedison

Steven Keith Handelsman

Arun Kumar Sridharan

Jayeshkumar Jayanarayan Barve

Frank Klaus Ennenbach

Gunasekaran Somasundaram

Danielle Walker Merfeld

Gordon Smith

A method () for desulfurization of a flue gas in a desulfurization unit of an industrial plant, includes receiving () a plurality of baseline parameters corresponding to the desulfurization unit of the industrial plant. The method further includes measuring (), using a stack sensor, an emission value of sulfur oxides in the flue gas. The method also includes estimating (), using a controller, a desirable value of a slurry parameter for desulfurization of the flue gas based on the measured emission value of the sulfur oxides. The method further includes determining (), using the controller, at least one desulfurization parameter based on the desirable value of the slurry parameter. The method also includes controlling (), using the controller, operation of the desulfurization unit based on the at least one desulfurization parameter to modify consumption of at least one of a slurry and an auxiliary power in the industrial plant.

System and method for optimized operation of flue gas desulfurization unit

One or more light sources emit light within first, second, and third wavelength ranges through exhaust gas. The first and second wavelength ranges are characterized by first and second different absorption wavelength ranges of a background gas. The third wavelength range is characterized by an absorption wavelength range of a gas-of-interest. At least some of the light within the first, second, and third wavelength ranges is absorbed by the exhaust gas thereby providing modified light characterized by the first, second, and third absorption wavelength ranges. One or more detectors receive the modified light. A processing subsystem determines a temperature of the exhaust gas based on the modified light characterized by the first and second absorption wavelength ranges and a concentration of the gas-of-interest based on the modified light characterized by the third absorption wavelength range and the temperature of the exhaust gas.

Gas detector and method of detection

A method for determining a multi-dimensional profile of at least one emission parameter corresponding to an exhaust emission of a combustion process is presented. The method includes emitting a laser beam in a plurality of directions through the exhaust emission. The laser beam includes a plurality of wavelengths and the exhaust emission is characterized by the plurality of emission parameters. The method further includes detecting a plurality of absorption spectrum signals for each of the plurality of directions and determining a plurality of single-dimensional profiles corresponding to the at least one emission parameter. Each of the plurality of single-dimensional profiles is determined based on the plurality of absorption spectrum signals corresponding to each respective direction of the plurality of directions. The method also includes generating the multi-dimensional profile corresponding to the at least one emission parameter based on the plurality of single-dimensional profiles.

System and method for determining an exhaust emission parameter profile

A system is presented. The system includes an electromagnetic radiation source configured to generate a mode matched electromagnetic radiation that irradiates a gas mixture filled in a gas compartment at a determined pressure 'P' bars, an intensity enhancement mechanism that internally reflects the mode-matched electromagnetic radiation a plurality of times to achieve an effective intensity 'E', of reflected electromagnetic radiation in a region of interest, that is &#x2018;N&#x2019; times an intensity of the mode-matched electromagnetic radiation, and a detection subsystem that analyses the gas-mixture based upon Raman Scattered photons emitted from the region of interest, wherein a product of the &#x2018;P&#x2019; and the &#x2018;N&#x2019; is at least 30.

Methods and systems to analyze a gas-mixture

A system is presented. The system includes an electromagnetic radiation source configured to generate a mode-matched electromagnetic radiation that irradiates a gas-mixture filled in a gas compartment at a determined pressure 'P' bars, an intensity enhancement mechanism that internally reflects the mode-matched electromagnetic radiation a plurality of times to achieve an effective intensity 'E', of reflected electromagnetic radiation in a region of interest, that is &#x2018;N&#x2019; times an intensity of the mode-matched electromagnetic radiation, and a detection subsystem that analyzes the gas-mixture based upon Raman scattered photons emitted from the region of interest, wherein a product of the &#x2018;P&#x2019; and the &#x2018;N&#x2019; is at least 30.

A method includes receiving a gas mixture at a first pressure including at least a primary gas and a secondary gas and changing a pressure of the received gas mixture from the first pressure to a second pressure. Further, the method includes determining a spectra of the gas mixture at the second pressure, wherein at least the first spectral line of the primary gas is spectrally distinguished from at least the second spectral line of the secondary gas, identifying a peak wavelength associated with the spectrally distinguished first spectral line of the primary gas based on at least two wavelengths of the secondary gas corresponding to at least two peak amplitudes in the spectra of the gas mixture, and determining a concentration of the primary gas based on the identified peak wavelength associated with the spectrally distinguished first spectral line of the primary gas.

System and method for measuring concentration of a trace gas in a gas mixture

A gas detector and method are presented. The gas detector includes a launcher unit for coupling and merging light beams in mid-infrared and infrared wavelength ranges into a single light beam and directing the merged single light beam towards a gas flow path; a receiver unit for generating at least one photo detector current signal based on the light beam transmitted through the gas flow path; and a control unit for processing at least one photo detector current signal to measure concentration of the at least two gases present in the gas flow path.

The present application provides an inlet air fogging system for a gas turbine engine. The inlet air fogging system may include a fogging nozzle array and a fogging control system in communication with the fogging nozzle array. The fogging control system may include a droplet size measurement system and a humidity level measurement system.

Systems and methods for inlet fogging control

An auto-aligning system is presented. One embodiment of the auto-aligning system includes a launcher unit configured to direct a first laser beam and a second laser beam through a chamber, wherein the first laser beam is co-linear with the second laser beam. The auto-aligning spectroscopy system further includes a receiver unit configured to receive the first laser beam and the second laser beam passing through the chamber. The receiver unit includes a first detector configured to determine an intensity of the first laser beam. The receiver unit also includes a second detector configured to determine a deviation of the second laser beam from a determined position. Further, the auto-aligning spectroscopy system includes a motorized stage configured to align the launcher unit to a base-line position based on the determined deviation of the second laser beam.

Auto-aligning spectroscopy system

A combustion gas measurement apparatus mounted in a gas turbine including: a tunable laser generating a radiation beam passing through a combustion gas path; a controller tuning the laser to emit radiation having at least a first selected wavelength and a second selected wavelength which both correspond to temperature-dependent transitions of a combustion species of the gas, wherein the first selected wavelength and the second selected wavelength are not near absorption peaks of neighboring wavelengths; a detector sensing the radiation beam passing through the combustion gas and generating an absorption signal indicative of an absorption of the beam by the combustion gas at each of the first wavelength and the second wavelength, and a processor executing a program stored on a non-transitory storage medium determining a combustion gas temperature based on a ratio of the adoption signals for the first wavelength and the second wavelength.

Hot gas temperature measurement in gas turbine using tunable diode laser

Embodiments of the invention include an inspection system to inspect internal components of a compressor of a gas turbine engine. The inspection system includes an image recording assembly having one or more image recording devices, light sources, storage devices, and power supplies. The image recording assembly may be inserted into a compressor without removal of the compressor housing or disassembly of the compressor. The image recording assembly may be removably coupled to a rotary component of the compressor, e.g., a rotor blade, and used to record images of stationary components, e.g., stator vanes, of the compressor. The images may be inspected to identify wear and/or defects in the stationary components, e.g., stator vanes.

System and method for inspection of stator vanes

A system is disclosed that includes an image recording assembly for recording images of a stator vane of a compressor and a mechanism configured to magnetically couple the image recording assembly to a rotor blade of a compressor. Additional systems are provided that include image recording assemblies. Methods implementing the disclosed systems are also provided.

Image recording assemblies and coupling mechanisms for stator vane inspection

A system for the monitoring and/or controlling emission levels of nitrogen oxide and a reductant from a stream of combustion exhaust, wherein the internal combustion engine includes a SCR unit disposed in the stream of combustion exhaust between an upstream conduit and a downstream conduit, the SCR unit having a catalyst that is configured to catalytically reduce nitrogen oxides contained in the combustion exhaust to elemental nitrogen in the presence of a reductant and oxygen, and wherein the internal combustion engine further includes a reductant injector; the system comprising: a laser absorption spectroscopy unit that is disposed in the downstream conduit and configured to measure the concentration level of at least nitrogen oxide and the reductant in the exhaust; and a control unit.

Systems and apparatus relating to the monitoring and/or controlling of selective catalytic reduction processes

Determination of steam quality by passing one or more laser beams through steam in a steam chamber and directly determining a total number of vapor molecules and a total number of water molecules based on absorption of radiation in the one or more laser beams by the water vapor phase and the liquid water phase in the steam. Specific volumes of water vapor phase and liquid water phase in the steam using the total numbers of water vapor and liquid water molecules are determined and the quality of the steam is calculated based on the specific volumes of the water vapor phase and the liquid water phase in steam. One embodiment comprises a narrow linewidth laser for measuring steam quality and another embodiment comprises multiple broadband lasers for measuring steam quality.

Apparatus and method for measuring steam quality

Measurement of steam quality using multiple broadband lasers

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Bengaluru, India

Chayan Mitra