초록 ▼

Large quantities of CO2 snow are provided by a system and method which utilizes two reservoirs which maintain at least about 4500 pounds of CO2 at about its triple point, a substantial portion of which contains solid CO2. A first such reservoir subcools high pressure liquid CO2 flowing therethrough

Large quantities of CO2 snow are provided by a system and method which utilizes two reservoirs which maintain at least about 4500 pounds of CO2 at about its triple point, a substantial portion of which contains solid CO2. A first such reservoir subcools high pressure liquid CO2 flowing therethrough and permits efficient production of CO2 snow. A second such reservoir assists in cooling and condensing CO2 vapor recirculating through the system, as well as in efficiently obtaining CO2 being delivered to the system from an outside source.

대표청구항 ▼

A method for efficiently providing large quantities of CO2 snow, which method comprises the steps of maintaining a reservoir of at least about 2000 pounds of solid CO2 at about its triple point containing a substantial portion of solid CO2, connecting a source of high pressure liquid CO2 to a first

A method for efficiently providing large quantities of CO2 snow, which method comprises the steps of maintaining a reservoir of at least about 2000 pounds of solid CO2 at about its triple point containing a substantial portion of solid CO2, connecting a source of high pressure liquid CO2 to a first region of said reservoir, connecting a second region of said reservoir to a receptacle for receiving a large quantity of CO2 snow and causing the flow of high pressure liquid CO2 through said reservoir while deterring the exit passage of solid CO2, whereby high pressure CO2 flows through said reservoir when it is subcooled by contact with solid CO2 therein, and expanding said subcooled CO2 at the receptacle to create solid CO2 and CO2 vapor.