TUSTP 2003 By Dong Xiang May 20, 2003 By Dong Xiang May 20, 2003 DOE Project: StarCut Differential...
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Transcript of TUSTP 2003 By Dong Xiang May 20, 2003 By Dong Xiang May 20, 2003 DOE Project: StarCut Differential...
![Page 1: TUSTP 2003 By Dong Xiang May 20, 2003 By Dong Xiang May 20, 2003 DOE Project: StarCut Differential Dielectric Sensor — Experiments and Modeling DOE Project:](https://reader035.fdocuments.us/reader035/viewer/2022062600/5a4d1b597f8b9ab0599aa86c/html5/thumbnails/1.jpg)
TUSTP 2003TUSTP 2003
By By Dong XiangDong Xiang
May 20, 2003May 20, 2003
DOE Project:StarCut Differential Dielectric
Sensor — Experiments and Modeling
![Page 2: TUSTP 2003 By Dong Xiang May 20, 2003 By Dong Xiang May 20, 2003 DOE Project: StarCut Differential Dielectric Sensor — Experiments and Modeling DOE Project:](https://reader035.fdocuments.us/reader035/viewer/2022062600/5a4d1b597f8b9ab0599aa86c/html5/thumbnails/2.jpg)
TopicsTopics
Introduction Fundamentals of Microwave Measurements Measurement Methods of Permittivity Proposed Solution Future Plans
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Introduction
StarCut is ChevronTexaco’s meter for continuous measurement of multiphase fluid composition
Microwave signal is used to measure dielectric properties of the fluids
At present, no analytical model is available for StarCut
![Page 4: TUSTP 2003 By Dong Xiang May 20, 2003 By Dong Xiang May 20, 2003 DOE Project: StarCut Differential Dielectric Sensor — Experiments and Modeling DOE Project:](https://reader035.fdocuments.us/reader035/viewer/2022062600/5a4d1b597f8b9ab0599aa86c/html5/thumbnails/4.jpg)
TopicsTopics
Fundamentals of Microwave Measurements
Waveguide
Microwave Characterization
S-Parameter
![Page 5: TUSTP 2003 By Dong Xiang May 20, 2003 By Dong Xiang May 20, 2003 DOE Project: StarCut Differential Dielectric Sensor — Experiments and Modeling DOE Project:](https://reader035.fdocuments.us/reader035/viewer/2022062600/5a4d1b597f8b9ab0599aa86c/html5/thumbnails/5.jpg)
Sensor Cell of StarCut
Transmitting Antenna Receiving Antenna
Fluid
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Waveguide
Waveguide is used for efficient transfer of microwave signals from one point to another
In StarCut, rectangular waveguide is used
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Microwave Characterization
Incident Wave
Reflected Wave
Transmitted Wave
Sample
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Why Use S-Parameter?
It is very hard to measure total voltage and current at device ports
S-Parameter is relatively easy to obtain at high frequency
S-Parameter is related to familiar measurements (gain, loss, reflection coefficient)
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S-Parameter Measurement
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Topics
Measurement Methods of Permittivity Transmission Line Method
Reflection/Transmission Method Amplitude Attenuation + Phase
Shift S-Parameter
Transmission Line Equation Method Cavity Resonator Method
Full Wave Analysis Method Perturbation Theory Method
![Page 11: TUSTP 2003 By Dong Xiang May 20, 2003 By Dong Xiang May 20, 2003 DOE Project: StarCut Differential Dielectric Sensor — Experiments and Modeling DOE Project:](https://reader035.fdocuments.us/reader035/viewer/2022062600/5a4d1b597f8b9ab0599aa86c/html5/thumbnails/11.jpg)
Transmission Line Method
Waveguide structure is modeled as transmission line
Transmission line parameters are measured to determine permittivity
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Amplitude Attenuation and Phase Shift
Lookup Table Method (Hatton,Texaco, 1989)
This patent is the theoretical foundation of StarCut currently used in North Campus
Attenuation + phase shift + Database (lookup table)
![Page 13: TUSTP 2003 By Dong Xiang May 20, 2003 By Dong Xiang May 20, 2003 DOE Project: StarCut Differential Dielectric Sensor — Experiments and Modeling DOE Project:](https://reader035.fdocuments.us/reader035/viewer/2022062600/5a4d1b597f8b9ab0599aa86c/html5/thumbnails/13.jpg)
Amplitude Attenuation and Phase Shift
Analytical method (Kraszewski, 1990)
Measurement has to be done twice using different thickness of sample
It is difficult for dynamic measurement
No hole-effect consideration
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S-Parameter Method
S-Parameter is measured to determine permittivity (Marrelli, ChevronTexaco, 1997)
No hole-effect consideration
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Transmission Line Equation Method
Transmission line equation and boundary condition are used to determine permittivity
This is the theoretical foundation of Huang’s Thesis (1997)
Polynomial fitting for hole-effect
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Huang’s Model
Section 1
Section 2
Section 3
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Cavity Resonator Method
Resonance frequency is measured to determine permittivity
Network analyzer is used to get resonance frequency
Advantage: hole-effect can be considered
Only valid for low-loss material, not useful for multiphase flow measurement
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Full Wave Method
Resonance frequency is determined by electromagnetic equation and boundary condition
Advantage: hole-effect can be easily calculated
This is the theoretical foundation of Janezic, NIST (Colorado, 1999)
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Perturbation Theory
Resonance frequency is determined using perturbation theory for material in cavity resonator
Advantage: hole-effect can be calculated
Disadvantage: too many assumptions affect the measurement accuracy
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Topics
Proposed Solution:
Transmission Line Method
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Solution: Model
Resonator method is not good for our case
Reason: multiphase fluid has high loss
Transmission line method is considered
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Future Plans
Develop model for StarCut, minimize hole-effect
Hardware Improvement of StarCut
Use StarCut to measure other parameters in multiphase flow
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Thank You!