| abstract |
The present invention relates to a cascade cooling system in which a refrigerant containing a fluoroolefin is circulated. The cascade cooling system of the present invention includes a low temperature cooling loop and an intermediate temperature cooling loop. Fluoroolefin circulates in either or both loops. In one particular embodiment, the fluoroolefin circulates in the intermediate temperature loop. In one particular embodiment, wherein the cascade cooling system includes first and second cascade heat exchangers and a secondary heat transfer loop extending between the first and second cascade heat exchangers, the first and / or Alternatively, either of the second refrigerants may be a fluoroolefin, but this is not necessarily the case. |