Antifreeze cooling subsystem
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United States of America Patent
Stats
-
Dec 4, 2007
Grant Date -
Nov 11, 2004
app pub date -
Jun 10, 2004
filing date -
Sep 22, 1998
priority date (Note) -
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status (Latency Note)
Importance
Abstract
Liquid cooled systems having coolant circulation loops must often operate in below freezing conditions. For instance, in various applications certain fuel cell systems must be able to tolerate repeated shutdown and storage in below freezing conditions. Conventional glycol-based coolants typically used for internal combustion engines are generally unsuitable for use in the associated fuel cell cooling subsystems due to the presence of additives and/or inhibitors which are normally included to deal with problems relating to decomposition of the glycol. With additives or inhibitors present, the coolant conductivity can be sufficiently high as to result in electrical shorting or corrosion problems. However, provided the purity of the coolant is maintained, a pure glycol and water coolant mixture may be used as a fuel cell system coolant to obtain suitable antifreeze protection. Adequate purity can be maintained by including an ion exchange resin unit in the cooling subsystem.
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- 1 Citation Count
- H01M Class
- 2.58 % this patent is cited more than
- 18 Age
