Fire suppression system with freeze protection
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United States of America Patent
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-
Dec 25, 2012
Grant Date -
Sep 2, 2010
app pub date -
Oct 29, 2007
filing date -
Oct 29, 2007
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A water and inert gas fire suppression system (10), and method for extinguishing a fire in a protected space are provided with a simple and inexpensive freeze protection mechanism. To prevent the water, or other liquid fire extinguishing agent, entrained in the inert gas flow from freezing during transport through the inert gas distribution network (15, 15a, 15b, 17, 19) a secondary liquid is introduced into the inert gas flow and then removed from the inert gas flow upstream of the discharge of the two-phase water and inert gas flow into the space being protected. The inert gas is heated by means of the thermal inertia (TI) of the secondary liquid, which may be excess amount of water or an amount of another liquid having a thermal inertia (TI) at least equal to that of water.
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