Week 13 HET 110

Ester Lubricants

A synthetic oil used for HFC refrigerants. R-410, R404

fractionation

Occurs when one or more refrigerants in a blend condenser or evaporate at different rates.

Azeotropes

Refrigerant that are single or multi compound that condense and evaporate at the same temperature, R-12, R-22

Zeotropic

Refrigerant that experience larger temperature glide. HFC-507C

Near-Azeotropic

Refrigerants that have a multiple compound make up and have a very small amount of glide. R-502, R-407C, R-410A

Glide

The temperature difference from the time a refrigerant starts to condense to the temperature where it is completely condensed.

Vent

To release refrigerant into the atmosphere in large quantities.

Purge

To remove air from a line or tank using small amounts of refrigerant.

Mineral oils

Use on older CFC and HCFC Refrigerants. R-12, R-22

Schrader Valve

Used as a insert into a valve body to allow access into a refrigeration system.