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Diode Laser-Based Sensors Improve Temperature Measurement in Energy Applications

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Chayan Mitra, GE Global Research Centre - Bangalore

The power generation industry has to focus on several key factors to make its future products successful in the electrical power generation market. These factors include: Higher machine efficiency and optimized life cycle cost; Reliable operation of machinery during repeated startups and shutdowns; Maintenance and health management of the plants; Ability to meet regulatory emissions standards; Fuel flexibility. Gas turbine performance is highly dependent on the turbine entry temperature; typically, higher combustion and firing temperatures lead to higher thermal efficiencies. The blades...Read full article

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    Published: June 2011
    Glossary
    speckle pattern
    A power intensity pattern produced by the mutual interference of partially coherent beams that are subject to minute temporal and spatial fluctuations.
    angle of incident lightChayan MitraCombustiondiode lasersdirect absorption spectroscopyelectronsFeaturesgas turbineGeGE Global Research CentregenerationHeNe diode laserHITRAN databaseincident light frequencyIndiainfrared thermocoupleinterference thermometrylife cycle costmachine efficiencymetalMicro- and Nano-Structures Technologies Laboptical reflectance-based noncontact temperature measurementphotothermal techniquesplasma frequencyregulatory emissions standardsrelaxation timesecond-harmonic detectionSensors & Detectorsslip-ring thermocouplesspeckle patternthermoreflectance methodstunable diode laser absorptionwavelength modulation spectroscopyWMS-2fLasers

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