Solids Fraction Measurement with a Reflective Fiber Optic Probe

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A method has been developed to extract solids fraction information from a reflective fiber optic probe. The commercially available reflective fiber optic probe was designed to measure axial particle velocity (both up and down directions). However, the reflected light intensity measured is related to particle size and particle concentration. A light reflection model is used to relate the reflected light intensity to solids fraction. In this model we assume that the reflected light intensity is a fixed fraction, K1, of the total light intensity lost in penetration of a solid layer. Also, the solids fraction is related to particle concentration, ... continued below

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Seachman, S.M.; Yue, P.C.; Ludlow, J.C. & Shadle, L.J. November 1, 2006.

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Description

A method has been developed to extract solids fraction information from a reflective fiber optic probe. The commercially available reflective fiber optic probe was designed to measure axial particle velocity (both up and down directions). However, the reflected light intensity measured is related to particle size and particle concentration. A light reflection model is used to relate the reflected light intensity to solids fraction. In this model we assume that the reflected light intensity is a fixed fraction, K1, of the total light intensity lost in penetration of a solid layer. Also, the solids fraction is related to particle concentration, N, in the light path, by N = K2 (1- ε), where (1-ε) is the solids fraction. The parameters K1 and K2 are determined through a calibration and curve fitting procedure. This paper describes this procedure and the steps taken to derive the values of K1 and K2. It is proposed that the reflective fiber optic can be used for real time measurement of solids fraction in a circulating fluid bed.

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From publisher in Proceedings of the AIChE Annual Meeting, CD, paper 569c, 6 pp.

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  • AIChE 2006 Annual Meeting, San Francisco, CA, Nov. 12-17, 2006

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  • Report No.: DOE/NETL-IR-2007-030
  • Grant Number: None cited
  • Office of Scientific & Technical Information Report Number: 912704
  • Archival Resource Key: ark:/67531/metadc887867

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Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • November 1, 2006

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Nov. 4, 2016, 2:04 p.m.

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Seachman, S.M.; Yue, P.C.; Ludlow, J.C. & Shadle, L.J. Solids Fraction Measurement with a Reflective Fiber Optic Probe, article, November 1, 2006; (digital.library.unt.edu/ark:/67531/metadc887867/: accessed December 11, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.