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| Term | Meaning |
|---|---|
| Alkyl Benzene Oil | synthetic refrigeration oil used as a higher performing replacement formineral oil. |
| Alternative Refrigerant | Any of a number of refrigerants or refrigerant mixtures designed to replace CFC or HCFC refrigerants. |
| CFC Refrigerant | CFC refers to the chemical composition of the refrigerant. Chlorofluorocarbon indicates that the refrigerant is comprised of Chlorine, Fluorine, and Carbon. Common CFC refrigerants are R-11, R-12, R-13, R-113, R-114, and R-115. |
| Azeotrope | mixture made up of two or more refrigerants that act as a single fluid. The components of azeotropic mixtures will not separate under normal operating conditions and they can be charged as a vapor or liquid |
| Drop-In Replacement | An alternative refrigerant that can be installed directly into an existing system with minor equipment changes. |
| Polyolester Lubricant (POE) | Also sometimes called ester oil. A family of synthetic refrigeration lubricants, generally used with non-chlorinecontaining refrigerants. These lubricants have an oxygen containing chemical group called an ester. POEs are generally compatible with existing mineral oils, and system components. Ester oils are slightly hygroscopic and should be stored in well sealed, non-porous containers. |
| Fractionation | The change in composition in the liquid phase of a refrigerant blend that results from more of the higher pressure component(s) moving into the vapor.If the vapor is lost during leakage, the remaining refrigerant will run at lower pressure and have lower capacity than the original charge. |
| Global Warming Potential | Global warming occurs when solar energy penetrates the atmosphere and the resultant infrared energy from the earth’s surface is absorbed by certain gases and not allowed to leave. This process is commonlyknown as the greenhouse effect. Refrigerant GWPs are normally reported as a multiple of the effect of Carbon Dioxide for a 100 year time period, which is set to a value of 1. The GWP for R-134a is 1300, or 1300 times as much as CO2. |
| HCFC Refrigerant | HCFC refers to the chemical composition of the refrigerant. Hydrochlorofluorocarbon indicates that the refrigerant is comprised of Hydrogen, Chlorine, Fluorine, and Carbon. Common HCFC refrigerants are R-22,R-123, R-124, and R-142b. |
| HFC Refrigerant | HFC refers to the chemical composition of the refrigerant. Hydrofluorocarbon indicates that the refrigerant is comprised of Hydrogen, Fluorine, and Carbon. Common HFC refrigerants are R-32, R-125, R134a, R-143a, and R-152a. |
| High Pressure Refrigerants (HP) | A term used for some alternative refrigerants designed to operate in the low temperature (-35ºF to 0ºF) range. |
| Hygroscopic | tendency for refrigeration oils to absorb moisture from the atmosphere. |
| Interim Replacements (SHORT TERM) | Refrigerants intended to serve as an intermediate solution during the transition from CFC to HFC refrigerants.Most interim replacements contain HCFC refrigerants like R-22. |
