Jeffrey G Escobar

US Patent:

20020148246, Oct 17, 2002

Filed:

Apr 11, 2001

Appl. No.:

09/833304

Inventors:

Jeffrey Escobar - Kirkland WA, US
Jon Hocker - Bothell WA, US
Hakan Ohlsson - Furulund, SE
John Strong - Kirkland WA, US

Assignee:

FMC Corporation

International Classification:

F25D003/12
F25D017/02
F25B041/06
F25D013/00

US Classification:

062/384000, 062/434000, 062/527000, 062/435000, 062/330000

Abstract:

A two-stage refrigeration system includes an intermediate slurry tank for receiving and storing a refrigerant vapor and a slurry of solid sublimatable refrigerant particles in a liquid. The intermediate slurry tank has a first outlet for outflow of the slurry from the tank, a second outlet for outflow of the refrigerant vapor, a first inlet for receiving at least the liquid, and a second inlet for receiving the refrigerant. The refrigeration system also includes a compression system having a first low pressure inlet and second intermediate pressure inlet, and having a high pressure outlet. A conduit connects the second outlet of the intermediate slurry tank to the intermediate pressure inlet of the compression system so as to compress the vapor with less energy than would be needed to compress low pressure refrigerant vapor.