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

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Description

Three test instruments are to be used to determine the abilities of photo-acoustic technology for the ultimate purpose of measuring unburned carbon in fly ash in an on-line configuration. The first test instrument is in a single microwave frequency system previously constructed to measure photo-acoustic signals in an off-line configuration. This system was assembled and used to begin testing parameters thought to be influential in the resulting photo-acoustic signal output. A standard modulation frequency was chosen based upon signal to noise data gained from experimentation and sample heterogeneity was tested and found not to be influential. Simultaneously, a second instrument ... continued below

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19 pages

Creation Information

Brown, Robert C.; Weber, Robert J. & Suby, Andrew A. January 1, 2002.

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Description

Three test instruments are to be used to determine the abilities of photo-acoustic technology for the ultimate purpose of measuring unburned carbon in fly ash in an on-line configuration. The first test instrument is in a single microwave frequency system previously constructed to measure photo-acoustic signals in an off-line configuration. This system was assembled and used to begin testing parameters thought to be influential in the resulting photo-acoustic signal output. A standard modulation frequency was chosen based upon signal to noise data gained from experimentation and sample heterogeneity was tested and found not to be influential. Simultaneously, a second instrument is to be constructed based in part on lessons learned with the first instrument, and to expand the capabilities of the first instrument. Improvements include a control loop to allow more constant microwave power output and an ability to operate over a range of microwave frequencies. To date, the design of the second instrument has been completed and components ordered. The third instrument will be designed based on the experiences of the first two instruments and will operate in an on-line carbon-in-ash monitoring system for coal-fired power plants.

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19 pages

Notes

OSTI as DE00793671

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  • Other Information: PBD: 1 Jan 2002

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  • Report No.: FC26-01NT41220--01
  • Grant Number: FC26-01NT41220
  • DOI: 10.2172/793671 | External Link
  • Office of Scientific & Technical Information Report Number: 793671
  • Archival Resource Key: ark:/67531/metadc743179

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  • January 1, 2002

Added to The UNT Digital Library

  • Oct. 19, 2015, 7:39 p.m.

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  • March 25, 2016, 1:46 p.m.

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Brown, Robert C.; Weber, Robert J. & Suby, Andrew A. MONITORING POWER PLANT EFFICIENCY USING THE MICROWAVE-EXCITED PHOTOACOUSTIC EFFECT TO MEASURE UNBURNED CARBON, report, January 1, 2002; Pittsburgh, Pennsylvania. (digital.library.unt.edu/ark:/67531/metadc743179/: accessed August 17, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.