Refrigerants |
Definition
- A refrigerant is any fluids that picks up heat by evaporating at a low temperature and pressure and gives up heat at a higher temperature and pressure. Volatile Fluid
|
Main Categories |
| CFC |
Chlorofluorocarbons (R-12) Phased out by year 2020 |
| HCFC |
Hydrochloroflurocarbons (r-22 , mp-39 , r-123) |
| HFC |
Hydroflurocarbons (r-134a , az-50 (r-507)) |
| HC |
Hydrocarbons (r-12a , r-22a) (propane) |
| Ammonia |
R-717 |
Refrigerant Properties |
| Chemical |
Reaction? |
| Physical |
Easy To live with? |
| Thermal |
Heat Transfer? |
Chemical
- Are those that define the molecular structure of each refrigerant (chemical engineers)
|
Physical |
| Toxicity |
Is it safe to handle? |
| Flammability |
Flammability? |
| Odor |
What does it smell like? |
Leak detection |
- Ultra Sonic (all)
- Soap & Bubble/ UV with die (all)
- CFC HCFC Halide Torch
- Electronic (chlorine)
- HFC Electronic (fluorine)
- Ammonia Litmus Paper
- Sulphur Candle
- Leakage tendency molecule size?
- Moisture reaction. How will it react to the system?
|
