| 摘要 |
1,184,775. Controlling fuel cell electrolyte concentration. COMPAGNIE GENERALE D'ELECTRICITE. 24 Jan., 1968 [17 Feb., 1967], No. 3835/68. Heading B1X. [Also in Division H1] In a fuel cell system the concentration of the electrolyte is held between upper and lower values C 2 and C 1 , between which the cell functions normally, the excess of diluted electrolyte is introduced into a chamber calibrated at 3 levels, wherein a siphon is primed when the liquid reaches the upper level and withdraws liquid until the lower level is reached, when it is unprimed, and electrolyte at concentration C 3 , greater than C 1 , is then supplied until the level of liquid reaches the mean level, the 3 levels being such that the upper level is reached when the electrolyte concentration in the cell has fallen to C 1 , when the mean level corresponded to concentration C 2 , and the volume between the lower and mean levels equals the volume of electrolyte at concentration C 3 required to bring the electrolyte concentration in the cell up from C 1 to C 2 . In the Figure electrolyte is cycled from the fuel cell 1 via conduit 2 to a constant level reservoir 3 and then through filter 10 to chamber 4 and back to the fuel cell by pump 5. When the water produced by the cell has raised the electrolyte level from b (C 2 ) to a (C 1 ), siphon 12 is primed and electrolyte is siphoned into vessel 11 until level c is reached. Concentrated electrolyte (C 3 ) now runs from reservoir 13 via conduit 15 until level b is reached, when the mouth of conduit 14 is blocked and flow ceases, the overall concentration now being C 2 . The cock 8 is operated when the cell is out of use to bring by-pass conduit 7 into communication with conduit 6. |
