Systems for supplying tanks with cryogen
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United States of America Patent
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-
Jul 8, 1980
Issued Date -
N/A
app pub date -
Jul 14, 1978
filing date -
Nov 1, 1976
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A system for filling transportable tanks with a cryogen, such as low pressure liquid carbon dioxide. A holding chamber is supplied with liquid CO.sub.2 from a storage vessel system, and the pressure of liquid CO.sub.2 is reduced to the triple point to create CO.sub.2 snow and form a low-temperature coolant reservoir. CO.sub.2 vapor from the chamber is compressed and returned to the storage vessel system. Liquid CO.sub.2 can be supplied simultaneously to the tanks of several vehicles at below about 125 psig, and vapor from these tanks is promptly condensed by melting CO.sub.2 snow in the holding chamber. Standby cooling of vehicle cargo compartments can also be effected with recovery of the CO.sub.2 vapor using an auxiliary compressor.
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