ABSORPTION REFRIGERATION CYCLES USING A LGWP REFRIGERANT

摘要

Absorptive refrigeration methods and systems that comprise refrigerant comprising one or more hydrofluoroolefin and/or hydrochlorofluoroolefins, and a solvent or absorbent selected from the group consisting of a polyalkyene glycol oil, a poly alpha olefin oil, a mineral oil and/or a polyolester oil.

主权项

1. A method for providing refrigeration, comprising:
a. evaporating a first liquid-phase refrigerant stream comprising a refrigerant selected from the group consisting of one or more hydrofluoroolefins, one or more hydrochlorofluoroolefins, and blends thereof, to produce a low-pressure vapor-phase refrigerant stream, wherein said evaporating transfers heat from a system to be cooled; b. contacting said low-pressure vapor-phase refrigerant stream with a first liquid-phase solvent stream comprising a solvent selected from the group consisting of a polyalkyene glycol oil, a poly alpha olefin oil, a mineral oil, a polyolester oil, and combinations thereof under conditions effective to dissolve substantially all of the refrigerant of the vapor-phase refrigerant stream into the solvent of the first liquid-phase solvent stream to produce a refrigerant-solvent solution stream; c. increasing the pressure and temperature of the refrigerant-solvent solution stream by transfer of heat from a solar collector to said solution. d. thermodynamically separating said refrigerant-solvent solution stream into a high-pressure vapor-phase refrigerant stream and a second liquid-phase solvent stream; e. recycling said second liquid-phase solvent stream to step (b) to produce said first liquid-phase solvent stream; f. condensing said high-pressure vapor-phase refrigerant stream to produce a second liquid phase refrigerant stream; and g. recycling said second liquid-phase refrigerant stream to step (a) to produce said first liquid-phase refrigerant stream.