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US 10,704,428 B2Granted
Heat transfer process
AssigneeArkema France
InventorWissam Rached
Life of this patent
Estimating the term…
Abstract
The use of a refrigerant in organic Rankine cycle systems including at least one hydrofluoroolefin, having at least four carbon atoms represented by the formula (I) R1CH═CHR2 in which R1 and R2 independently represent alkyl groups having from 1 to 6 carbon atoms, substituted with at least one fluorine atom, optionally with at least one chlorine atom.
Claims14
An energy conversion process employing a turbine system having at least one stage comprising successively:
- evaporating a refrigerant,
- expanding said refrigerant in a turbine,
- desuperheating said refrigerant in an internal exchanger,
- condensing said refrigerant, and
- compressing said refrigerant in a pump,
- wherein the refrigerant comprises:
- from 40 to 100 wt. % of 1,1,1,4,4,4-hexafluorobut-2-ene, and
- from 0 to 60 wt. % of at least one compound selected from the group consisting of pentane, isopentane, cyclopentane and trans-1,2-dichloroethylene.
5 more elements
Dependencies are inferred from the claim text.