Method and apparatus for controlling the fuel flow to a steam re

Details Method and apparatus for controlling the fuel flow to a steam re Method and apparatus for controlling the fuel flow to a steam re

1975-11-20

1976-06-08

Mack, John H.

Batteries: thermoelectric and photoelectric

Thermoelectric

Radiation pyrometer

136 86C, H01M 806

Patent

active

039619869

ABSTRACT:
A fuel cell system includes an ejector for pumping steam and fuel into a steam reformer. Steam is the primary flow through the ejector and fuel is the secondary flow. The rate of steam flow is metered by a variable area orifice in the ejector. The fuel passes through a laminar restrictor in the conduit carrying the fuel to the ejector. A pressure regulator increases and decreases the pressure of the fuel supplied to the laminar restrictor by amounts equal to increases and decreases in the ejector back pressure thereby eliminating the ejector back pressure as a factor affecting the rate of fuel flow into the ejector. The laminar restrictor is designed to match the fuel flow to the ejector pumping characteristics so as to provide the desired steam to fuel ratio for the steam reformer for each operational mode of the fuel cell.

REFERENCES:
patent: 3480417 (1969-11-01), Setzer
patent: 3585077 (1971-06-01), Waldman

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