Chemistry: electrical current producing apparatus – product – and – With pressure equalizing means for liquid immersion operation
Reexamination Certificate
2006-05-30
2006-05-30
Kalafut, Stephen J. (Department: 1745)
Chemistry: electrical current producing apparatus, product, and
With pressure equalizing means for liquid immersion operation
C429S006000, C429S006000
Reexamination Certificate
active
07052787
ABSTRACT:
Proton-exchange membrane fuel-cell power generating equipment includes a heat exchanger coupled to a process burner and, therethrough, to a fan. When water needs to be heated, such as during startup, the water is circulated through the heat exchanger and the process burner is operated (ignited) to heat the water. When the water needs to be cooled, such as when a hot water reserving tank is full, the water is circulated through the heat exchanger and the fan is operated, but the process burner is not operated, to cool the water. Water is circulated through part or all of a water system to prevent freezing while the system is stopped. Optionally, the process burner is operated to heat the circulated water. The heat exchanger and other heat exchangers in the system are arranged to efficiently recover heat from burners, a fuel-cell cooling system and exothermic processes.
REFERENCES:
patent: 6309770 (2001-10-01), Nagayasu et al.
patent: 6428919 (2002-08-01), Takahashi et al.
patent: 6432568 (2002-08-01), Salvador et al.
patent: 6444338 (2002-09-01), Araki et al.
patent: 7-220745 (1995-08-01), None
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patent: 11-97044 (1999-04-01), None
patent: 2000-285942 (2000-10-01), None
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English translation of JP 8-273,689 (Oct. 1996).
English translation of JP 11-97,044 (Apr. 1999).
English transaltion of JP 2000-285,942 (Oct. 2000).
Fuju Akira
Hatayama Tatsuji
Kadowaki Masataka
Makihara Katsuyuki
Miyai Keigo
Kalafut Stephen J.
Weingarten Schurgin, Gagnebin & Lebovici LLP
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