Refrigeration – Cryogenic treatment of gas or gas mixture – Solidification
Patent
1998-11-13
2000-09-12
Capossela, Ronald
Refrigeration
Cryogenic treatment of gas or gas mixture
Solidification
62 512, 62910, F25J 302
Patent
active
061160490
ABSTRACT:
A nozzle for producing a continuous gas/solid or gas/aerosol stream from a liquid having a high room temperature vapor pressure. The nozzle comprises a series of expansion stages, with the flow reversing direction after each expansion except the first and going over the conduit which comprised the previous expansion stage. In addition, the flow from the last expansion stage comes in contact with the inlet conduit, thereby exposing the inlet flow to the cold temperature produced in the nozzle. Since the flow in the nozzle is essentially adiabatic, the expansion in each stage takes heat from the flow in the previous stage, ultimately resulting in very low temperature flow. It is particularly useful as a fire extinguisher since it can produce solid CO.sub.2 snow and an aerosol of HFC-23 that are "thrown" by the remaining gaseous CO.sub.2 and HFC-23 at low exit velocities. This means that these agents can be used on Class A fires. A test nozzle using 1 liter (2.14 pounds) of HFC-23 demonstrated equivalency to a 21/2 pound Halon 1211 fire extinguisher as determined by the FAA/JRC Hidden Fire Test Protocol for hand-held extinguishers.
REFERENCES:
patent: 3257823 (1966-06-01), Hogan
patent: 3306058 (1967-02-01), Keiln
patent: 3492829 (1970-02-01), Stanford, Jr.
patent: 3706520 (1972-12-01), Grimm et al.
Capossela Ronald
The United States of America as represented by the Secretary of
Wildensteiner Otto M.
LandOfFree
Adiabatic expansion nozzle does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Adiabatic expansion nozzle, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Adiabatic expansion nozzle will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-85968