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Method and device for feeding a fuel cell with a fluid reactant
| Details |
Inventors: Grehier, Alain;
Assignee: Institut Francais du Petrole (FR)
Primary Examiner: Mack; John H.
Assistant Examiner: Feeley; H. A.
Attorney, Agent or Firm: Craig & Antonelli
The fluid reactant is circulated through a close loop in which is introduced additional fresh fluid under a substantially constant pressure. A fraction of the fluid flow is discharged from the loop during a first period at a substantially constant flow rate, this fluid discharge being discontinued during a second period, said periods repeatedly following one another. |
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DETAILED DESCRIPTION I claim: 1.
A method of feeding a fuel cell with at least one fluid reactant, comprising circulating at least one fluid reactant through a closed loop including a fuel cell, introducing a make-up amount of fresh fluid into said loop, keeping at a substantially constant value the fluid pressure within the closed loop during the whole operating period of the fuel cell, automatically discharging, during a discharge period, a fraction of the fluid flowing through the loop and interrupting during a non-discharge period the discharge of said fluid from the loop, said discharge and non-discharge periods repeatedly following one another, wherein the flow rate of said discharged fluid has substantially the same value during all said discharge periods, said value being constant and wherein a time interval between the beginning of two consecutive discharge periods has a predetermined value.
2.
A method according to claim 1, comprising measuring at least one parameter representative of the intensity of the electric current delivered by the fuel cell, producing a measuring signal as a function of the value of said parameter, producing a reference signal representative of said time interval between the beginning of two consecutive discharge periods and automatically producing the passage from a discharge period to a non-discharge period when said measuring and reference signals have the same value and the return to a discharge period when said reference signal reaches a predetermined value.
3.
A method according to claim 2, wherein said measured parameter is the intensity of electric current supplied by the fuel cell.
4.
A method according to claim 2, wherein said measured parameter is the flow rate of the fresh fluid introduced into the closed loop.
5.
A method according to claim 2, wherein said measured parameter is the fluid flow rate at the inlet of the fuel cell.
6.
A method according to claim 2, wherein said measured parameter is the fluid flow rate at the outlet of the fuel cell
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Fuel Cells 
