skip to main content
DOE Patents title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Staged venting of fuel cell system during rapid shutdown

Abstract

A venting methodology and system for rapid shutdown of a fuel cell apparatus of the type used in a vehicle propulsion system. H.sub.2 and air flows to the fuel cell stack are slowly bypassed to the combustor upon receipt of a rapid shutdown command. The bypass occurs over a period of time (for example one to five seconds) using conveniently-sized bypass valves. Upon receipt of the rapid shutdown command, the anode inlet of the fuel cell stack is instantaneously vented to a remote vent to remove all H.sub.2 from the stack. Airflow to the cathode inlet of the fuel cell stack gradually diminishes over the bypass period, and when the airflow bypass is complete the cathode inlet is also instantaneously vented to a remote vent to eliminate pressure differentials across the stack.

Inventors:
 [1];  [2];  [3]
  1. (Palmyra, NY)
  2. (Columbia, MD)
  3. (Webster, NY)
Issue Date:
Research Org.:
GENERAL MOTORS CORP
OSTI Identifier:
874462
Patent Number(s):
6395414
Assignee:
General Motors Corporation (Detroit, MI) OSTI
DOE Contract Number:  
AC02-90CH10435
Resource Type:
Patent
Country of Publication:
United States
Language:
English
Subject:
staged; venting; fuel; cell; rapid; shutdown; methodology; apparatus; type; vehicle; propulsion; hsub2; air; flows; stack; slowly; bypassed; combustor; receipt; command; bypass; occurs; period; time; example; five; conveniently-sized; valves; anode; inlet; instantaneously; vented; remote; remove; airflow; cathode; gradually; diminishes; complete; eliminate; pressure; differentials; fuel cell; cell stack; air flow; pressure differential; cell apparatus; /429/

Citation Formats

Clingerman, Bruce J., Doan, Tien M., and Keskula, Donald H. Staged venting of fuel cell system during rapid shutdown. United States: N. p., 2002. Web.
Clingerman, Bruce J., Doan, Tien M., & Keskula, Donald H. Staged venting of fuel cell system during rapid shutdown. United States.
Clingerman, Bruce J., Doan, Tien M., and Keskula, Donald H. Tue . "Staged venting of fuel cell system during rapid shutdown". United States. https://www.osti.gov/servlets/purl/874462.
@article{osti_874462,
title = {Staged venting of fuel cell system during rapid shutdown},
author = {Clingerman, Bruce J. and Doan, Tien M. and Keskula, Donald H.},
abstractNote = {A venting methodology and system for rapid shutdown of a fuel cell apparatus of the type used in a vehicle propulsion system. H.sub.2 and air flows to the fuel cell stack are slowly bypassed to the combustor upon receipt of a rapid shutdown command. The bypass occurs over a period of time (for example one to five seconds) using conveniently-sized bypass valves. Upon receipt of the rapid shutdown command, the anode inlet of the fuel cell stack is instantaneously vented to a remote vent to remove all H.sub.2 from the stack. Airflow to the cathode inlet of the fuel cell stack gradually diminishes over the bypass period, and when the airflow bypass is complete the cathode inlet is also instantaneously vented to a remote vent to eliminate pressure differentials across the stack.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {2002},
month = {1}
}

Patent:

Save / Share: