MONITORING POWER PLANT EFFICIENCY USING THE MICROWAVE-EXCITED PHOTOACOUSTIC EFFECT TO MEASURE UNBURNED CARBON | Zendy

Robert C. Brown | Zendy; Robert J. Weber | Zendy

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MONITORING POWER PLANT EFFICIENCY USING THE MICROWAVE-EXCITED PHOTOACOUSTIC EFFECT TO MEASURE UNBURNED CARBON

Author(s) -

Robert C. Brown,

Robert J. Weber

Publication year - 2003

Publication title -

osti oai (u.s. department of energy office of scientific and technical information)

Language(s) - English

Resource type - Reports

DOI - 10.2172/822230

Subject(s) - octave (electronics) , microwave , acoustics , signal (programming language) , photoacoustic imaging in biomedicine , optics , materials science , computer science , telecommunications , physics , programming language

Three test instruments are being evaluated to determine the feasibility of using photoacoustic technology for measuring unburned carbon in fly ash. The first test instrument is a single microwave frequency system previously constructed to measure photo-acoustic signals in an off-line configuration. This system was assembled and used to test parameters thought important to photo-acoustic signal output. A standard modulation frequency was chosen based upon signal to noise data gained from experimentation. Testing in the sixth quarter focused on initial testing for a magnetic photo-acoustic effect, loss tests and photo-acoustic tests on coal samples, and extending the testing range for the photo-acoustic effect over the octave of 900 MHz to 1800 MHz. Previous testing on this project was done at 1 GHz. In parallel with the photo-acoustic testing, some preliminary design considerations were investigated for the on-line monitor to be fabricated and testing in phase three of this project

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