CA2644871A1 - Method of measuring concentration of fuel - Google Patents

Method of measuring concentration of fuel Download PDF

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Publication number
CA2644871A1
CA2644871A1 CA002644871A CA2644871A CA2644871A1 CA 2644871 A1 CA2644871 A1 CA 2644871A1 CA 002644871 A CA002644871 A CA 002644871A CA 2644871 A CA2644871 A CA 2644871A CA 2644871 A1 CA2644871 A1 CA 2644871A1
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CA
Canada
Prior art keywords
concentration
fuel
accordance
cathode
reactive gas
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002644871A
Other languages
French (fr)
Other versions
CA2644871C (en
Inventor
Ku-Yen Kang
Pei-Fang Huang
Chiou-Chu Lai
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Industrial Technology Research Institute ITRI
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Industrial Technology Research Institute ITRI
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from TW97143528A external-priority patent/TWI473337B/en
Application filed by Industrial Technology Research Institute ITRI filed Critical Industrial Technology Research Institute ITRI
Publication of CA2644871A1 publication Critical patent/CA2644871A1/en
Application granted granted Critical
Publication of CA2644871C publication Critical patent/CA2644871C/en
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    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E60/00Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
    • Y02E60/30Hydrogen technology
    • Y02E60/50Fuel cells

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  • Fuel Cell (AREA)

Abstract

A method of measuring concentration of a fuel is provided. First, a fuel cell unit having at least an anode, a cathode, and a membrane electrode assembly (MEA) is provided. Next, a fuel is supplied to the anode, while a reactive gas is supplied to the cathode. Then, the amount of the reactive gas supplied to the cathode is adjusted and the concentration of the fuel is estimated in accordance with the consumption rate of the reactive gas in the fuel cell unit.

Claims (28)

1. A method of measuring concentration of a fuel, comprising:

providing a fuel cell unit comprising at least an anode, a cathode, and a membrane electrode assembly (MEA);

supplying a fuel to the anode;

supplying a reactive gas to the cathode; and adjusting an amount of the reactive gas supplied to the cathode, and estimating the concentration of the fuel in accordance with a consumption rate of the reactive gas in the cathode.
2. The method as claimed in claim 1, wherein a method of estimating the concentration of the fuel in accordance with a consumption rate of the reactive gas in the cathode comprises:

measuring an open circuit voltage of the fuel cell unit; and estimating the concentration of the fuel in accordance with a relationship between the open circuit voltage and time.
3. The method as claimed in claim 2, wherein the concentration of the fuel is estimated in accordance with a time point at which the open circuit voltage drops.
4. The method as claimed in claim 2, wherein the concentration of the fuel is estimated in accordance with a time period for the open circuit voltage to drop to a certain value.
5. The method as claimed in claim 2, wherein the concentration of the fuel is estimated in accordance with a speed at which the open circuit voltage drops.
6. The method as claimed in claim 1, wherein a method of estimating the concentration of the fuel in accordance with a consumption rate of the reactive gas in the cathode comprises:

measuring an output current of the fuel cell unit; and estimating the concentration of the fuel in accordance with a relationship between the output current and time.
7. The method as claimed in claim 6, wherein the concentration of the fuel is estimated in accordance with a time point at which the output current drops.
8. The method as claimed in claim 6, wherein the concentration of the fuel is estimated in accordance with a time period for the output current to drop to a certain value.
9. The method as claimed in claim 6, wherein the concentration of the fuel is estimated in accordance with a speed at which the output current drops.
10. The method as claimed in claim 1, wherein a method of estimating the concentration of the fuel in accordance with a consumption rate of the reactive gas in the cathode comprises:

measuring an output voltage of the fuel cell unit; and estimating the concentration of the fuel in accordance with a relationship between the output voltage and time.
11. The method as claimed in claim 10, wherein the concentration of the fuel is estimated in accordance with a time point at which the output voltage drops.
12. The method as claimed in claim 10, wherein the concentration of the fuel is estimated in accordance with a time period for the output voltage to drop to a certain value.
13. The method as claimed in claim 10, wherein the concentration of the fuel is estimated in accordance with a speed at which the output voltage drops.
14 14. The method as claimed in claim 1, wherein the fuel cell unit comprises a direct methanol fuel cell unit.
15. The method as claimed in claim 1, wherein the reactive gas comprises air or oxygen.
16. The method as claimed in claim 1, wherein the fuel comprises a methanol solution, an ethanol solution, or a formic acid solution.
17. The method as claimed in claim 1, wherein a method of adjusting the amount of the reactive gas supplied to the cathode comprises stopping supplying the reactive gas to the cathode.
18. The method as claimed in claim 1, wherein a method of estimating the concentration of the fuel in accordance with a consumption rate of the reactive gas in the cathode comprises:

measuring a concentration of the reactive gas in the cathode; and estimating the concentration of the fuel in accordance with a relationship between the concentration of the reactive gas in the cathode and time.
19. The method as claimed in claim 18, wherein the concentration of the reactive gas is measured through a sensor.
20. The method as claimed in claim 19, wherein the sensor comprises a sensor for measuring oxygen or a pressure gauge.
21. The method as claimed in claim 18, wherein the concentration of the fuel is estimated in accordance with a time period for the concentration of the reactive gas to drop to a certain value.
22. The method as claimed in claim 18, wherein the concentration of the fuel is estimated in accordance with the speed at which the concentration of the reactive gas drops.
23. The method as claimed in claim 18, wherein the fuel cell unit comprises a direct methanol fuel cell unit.
24. A method of measuring concentration of a fuel, comprising:

providing a fuel cell unit comprising at least an anode, a cathode, and a membrane electrode assembly (MEA);

supplying a fuel to the anode;

supplying a reactive gas to the cathode; and adjusting an amount of the reactive gas supplied to the cathode, and estimating the concentration of the fuel in accordance with a generation rate of a gaseous product in the cathode.
25. The method as claimed in claim 24, wherein a method of estimating the concentration of the fuel in accordance with the generation rate of the gaseous product in the cathode comprises:

measuring a concentration of the gaseous product in the cathode; and estimating the concentration of the fuel in accordance with a relationship between the concentration of the gaseous product in the cathode and time.
26. The method as claimed in claim 25, wherein the concentration of the gaseous product is measured through a sensor.
27. The method as claimed in claim 26, wherein the sensor comprises a sensor for measuring carbon dioxide.
28. The method as claimed in claim 25, wherein the concentration of the fuel is estimated in accordance with the speed at which the concentration of the carbon dioxide increases or the time period for the concentration of the carbon dioxide to increase to a certain value.
CA2644871A 2007-11-27 2008-11-26 Method of measuring concentration of fuel Active CA2644871C (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
TW96144978 2007-11-27
TW96144978 2007-11-27
TW97143528A TWI473337B (en) 2007-11-27 2008-11-11 Method of measuring concentration of fuel
TW97143528 2008-11-11

Publications (2)

Publication Number Publication Date
CA2644871A1 true CA2644871A1 (en) 2009-05-27
CA2644871C CA2644871C (en) 2012-03-27

Family

ID=40673794

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2644871A Active CA2644871C (en) 2007-11-27 2008-11-26 Method of measuring concentration of fuel

Country Status (2)

Country Link
JP (1) JP5366295B2 (en)
CA (1) CA2644871C (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101105364B1 (en) 2010-05-19 2012-01-16 한국과학기술연구원 Sensor and method for sensing fuel concentration, method and system apparatus for fuel recirculation of fuel cell using the same, fuel cell usage apparatus using the same

Family Cites Families (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4680530B2 (en) * 2003-06-09 2011-05-11 パナソニック株式会社 Fuel cell system
JP4172792B2 (en) * 2004-03-30 2008-10-29 株式会社東芝 Method for detecting fuel concentration in direct methanol fuel cell and direct methanol fuel cell system

Also Published As

Publication number Publication date
JP5366295B2 (en) 2013-12-11
CA2644871C (en) 2012-03-27
JP2009146894A (en) 2009-07-02

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