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Title: Ambient pressure fuel cell system

Abstract

An ambient pressure fuel cell system is provided with a fuel cell stack formed from a plurality of fuel cells having membrane/electrode assemblies (MEAs) that are hydrated with liquid water and bipolar plates with anode and cathode sides for distributing hydrogen fuel gas and water to a first side of each one of the MEAs and air with reactant oxygen gas to a second side of each one of the MEAs. A pump supplies liquid water to the fuel cells. A recirculating system may be used to return unused hydrogen fuel gas to the stack. A near-ambient pressure blower blows air through the fuel cell stack in excess of reaction stoichiometric amounts to react with the hydrogen fuel gas.

Inventors:
 [1]
  1. Los Alamos, NM
Issue Date:
Research Org.:
Los Alamos National Lab. (LANL), Los Alamos, NM (United States)
OSTI Identifier:
873236
Patent Number(s):
6117577
Assignee:
Regents of University of California (Los Alamos, NM)
Patent Classifications (CPCs):
H - ELECTRICITY H01 - BASIC ELECTRIC ELEMENTS H01M - PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
Y - NEW / CROSS SECTIONAL TECHNOLOGIES Y02 - TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE Y02E - REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
DOE Contract Number:  
W-7405-ENG-36
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
ambient; pressure; fuel; cell; provided; stack; formed; plurality; cells; membrane; electrode; assemblies; meas; hydrated; liquid; water; bipolar; plates; anode; cathode; distributing; hydrogen; gas; air; reactant; oxygen; pump; supplies; recirculating; return; unused; near-ambient; blower; blows; excess; reaction; stoichiometric; amounts; react; fuel cell; bipolar plates; stoichiometric amounts; liquid water; oxygen gas; fuel gas; cell stack; fuel cells; bipolar plate; stoichiometric amount; ambient pressure; pressure fuel; electrode assemblies; /429/

Citation Formats

Wilson, Mahlon S. Ambient pressure fuel cell system. United States: N. p., 2000. Web.
Wilson, Mahlon S. Ambient pressure fuel cell system. United States.
Wilson, Mahlon S. Sat . "Ambient pressure fuel cell system". United States. https://www.osti.gov/servlets/purl/873236.
@article{osti_873236,
title = {Ambient pressure fuel cell system},
author = {Wilson, Mahlon S},
abstractNote = {An ambient pressure fuel cell system is provided with a fuel cell stack formed from a plurality of fuel cells having membrane/electrode assemblies (MEAs) that are hydrated with liquid water and bipolar plates with anode and cathode sides for distributing hydrogen fuel gas and water to a first side of each one of the MEAs and air with reactant oxygen gas to a second side of each one of the MEAs. A pump supplies liquid water to the fuel cells. A recirculating system may be used to return unused hydrogen fuel gas to the stack. A near-ambient pressure blower blows air through the fuel cell stack in excess of reaction stoichiometric amounts to react with the hydrogen fuel gas.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2000},
month = {1}
}

Works referenced in this record:

Management of the Water Content in Polymer Electrolyte Membranes with Porous Fiber Wicks
journal, November 1993