| 0 | Initial value |
| ad | Adapted conditions |
| amb | Ambient |
| calc | Calculated value |
| cp | Compressor |
| crit | Critical condition |
| data | Data obtained from manufacturer |
| ex | Exhaust |
| in | Internal |
| is | Isentropic |
| leak | Leakage |
| loss | Compressor losses |
| n | Nominal |
| r | Refrigerant |
| ref | Reference |
| rel | Relative |
| s | Swept |
| su | Suction |
| thr | Nozzle throat |
| v | Isochoric |
| vol | Volumetric |
| w | Wall |