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Title: Method and apparatus for controlling mass flow rate of recycled anode tail gas in solid oxide fuel cell system

Abstract

In an SOFC stack system, a reformer supplies reformate to the stack. An anode tail gas portion is recycled into the reformer. An inline flowmeter indicates an apparent recycle flow rate. A map of anode tail gas composition as a function of fuel utilization efficiency U, reformer oxygen/carbon ratio O:C, and recycle percentage R is generated on a laboratory test bed at various recycle rates and fuel utilization rates. Compositions are sent through a flowmeter and a Coriolus mass flowmeter provide a Coriolus flow and sensor voltage function across the various compositions and flow rates to create an average curve and an average (reference) voltage at a given flow. A scale factor Z is calculated and used to determine a scaled sensor voltage X for use in an average flow polynomial curve fit equation to calculate tail gas mass flow rate at any flow value indicated by the flow meter.

Inventors:
; ;
Issue Date:
Research Org.:
Delphi Technologies, Inc., Troy, MI (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1531592
Patent Number(s):
7562588
Application Number:
11/412,620
Assignee:
Delphi Technologies, Inc. (Troy, MI)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
G - PHYSICS G01 - MEASURING G01F - MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL
DOE Contract Number:  
FC26-02NT41246
Resource Type:
Patent
Resource Relation:
Patent File Date: 2006-04-27
Country of Publication:
United States
Language:
English
Subject:
30 DIRECT ENERGY CONVERSION

Citation Formats

Absmeier, John P., Kelly, Sean M., and Geiger, Gail E. Method and apparatus for controlling mass flow rate of recycled anode tail gas in solid oxide fuel cell system. United States: N. p., 2009. Web.
Absmeier, John P., Kelly, Sean M., & Geiger, Gail E. Method and apparatus for controlling mass flow rate of recycled anode tail gas in solid oxide fuel cell system. United States.
Absmeier, John P., Kelly, Sean M., and Geiger, Gail E. Tue . "Method and apparatus for controlling mass flow rate of recycled anode tail gas in solid oxide fuel cell system". United States. https://www.osti.gov/servlets/purl/1531592.
@article{osti_1531592,
title = {Method and apparatus for controlling mass flow rate of recycled anode tail gas in solid oxide fuel cell system},
author = {Absmeier, John P. and Kelly, Sean M. and Geiger, Gail E.},
abstractNote = {In an SOFC stack system, a reformer supplies reformate to the stack. An anode tail gas portion is recycled into the reformer. An inline flowmeter indicates an apparent recycle flow rate. A map of anode tail gas composition as a function of fuel utilization efficiency U, reformer oxygen/carbon ratio O:C, and recycle percentage R is generated on a laboratory test bed at various recycle rates and fuel utilization rates. Compositions are sent through a flowmeter and a Coriolus mass flowmeter provide a Coriolus flow and sensor voltage function across the various compositions and flow rates to create an average curve and an average (reference) voltage at a given flow. A scale factor Z is calculated and used to determine a scaled sensor voltage X for use in an average flow polynomial curve fit equation to calculate tail gas mass flow rate at any flow value indicated by the flow meter.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2009},
month = {7}
}

Patent:

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