Several factors influence refrigerant selection, including: physical, chemical, and thermodynamic properties of the refrigerant; compressor design and system capacity; and stability, toxicity, reactivity, and environmental impacts of the refrigerant. This module discusses the properties of and differences between CFC, HCFC, HFC, HFO, and natural refrigerants. It also explains refrigerant numbering, safety classifications, compatibility with equipment and lubricating oil, and safety guidelines.
Learning Objectives
- List desirable characteristics for refrigerants in vapor-compression refrigeration systems
- Explain the properties of, and differences between, CFC, HCFC, HFC, HFO, and natural refrigerants
- Describe how refrigerant identification numbers and safety classifications are assigned
- Describe compatibility considerations for refrigerants, oils, and system equipment
- List safety guidelines for the handling and use of refrigerants