| US 7,562,588 B2 | ||
| Method and apparatus for controlling mass flow rate of recycled anode tail gas in solid oxide fuel cell system | ||
| John P. Absmeier, Rochester, N.Y. (US); Sean M. Kelly, Pittsford, N.Y. (US); and Gail E. Geiger, Caledonia, N.Y. (US) | ||
| Assigned to Delphi Technologies, Inc., Troy, Mich. (US) | ||
| Filed on Apr. 27, 2006, as Appl. No. 11/412,620. | ||
| Prior Publication US 2007/0251297 A1, Nov. 01, 2007 | ||
| Int. Cl. G01P 5/06 (2006.01) | ||
| U.S. Cl. 73—861.85 | 6 Claims |
| 1. A method for measuring mass flow rate of anode tail gas being recycled from an anode in a solid oxide fuel cell stack into
a reformer ahead of the anode, comprising the steps of:
a) providing a variable tail gas source for variably supplying said anode tail gas;
b) providing a sensor for sensing an apparent mass flow rate of said anode tail gas into said reformer and for providing a
raw voltage signal indicative thereof;
c) determining a voltage scale factor;
d) applying said voltage scale factor to said raw voltage signal to provide a scaled voltage signal; and
e) applying said scaled voltage signal to a normalized calibration equation to calculate said tail gas mass flow rate.
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