Ammonia/Co 2 refrigeration system

Details Ammonia/Co 2 refrigeration system Ammonia/Co 2 refrigeration system

2007-03-28

2008-08-05

Tapolcai, William E (Department: 3744)

Refrigeration

Diverse systems, e.g., ice and mechanical

C062S512000, C062S435000

Reexamination Certificate

active

07406837

ABSTRACT:
An ammonia/CO2refrigerating system having a liquid pump for feeding the liquid CO2cooled in a brine cooler by the utilization of the vaporization latent heat of ammonia in an ammonia refrigeration cycle to a cooler, which comprises a liquid receiving vessel4for receiving a CO2brine cooled in a brine cooler3, a liquid pump5capable of changing the rate of the feed of a liquid, a rising piping90provided between the liquid pump5and a cooler6, and a communication pipe100for communicating the top of the riser pipe90with the CO2gas phase in the liquid receiving vessel4, wherein the discharge pressure of the liquid pump5is set so as for the CO2recovered form the cooler3or the liquid receiver4in the state of a liquid or a gas-liquid mixture, and the level of the rise in the rising piping90is set at a level being the same as or higher than the highest storage level for the CO2brine in the liquid receiving vessel4. The above ammonia/CO2refrigerating system allows a refrigeration cycle of a combination of an ammonia cycle and a CO2cycle to be formed with no care, even when a refrigerating showcase, which is the cooler side of the CO2cycle, is installed at an arbitrary place.

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Relevant portion of the International Search Report issued in corresponding PCT application PCT/JP05/12232 with a mailing date of Oct. 11, 2005.

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