Subscripts.
| 0 | Initial value |
| ad | Adapted conditions |
| amb | Ambient |
| c | Condenser |
| calc | Calculated value |
| cp | Compressor |
| data | Obtained value |
| ev | Evaporator |
| ex | Exhaust |
| in | Internal or inlet |
| inj | Injection |
| int | Intermediate |
| is | Isentropic |
| leak | Leakage |
| loss | Compressor losses |
| n | Nominal |
| out | Outlet |
| r | Refrigerant |
| s | Swept |
| su | Suction |
| v | Volumetric, isochoric |
| vi | Vapour injection |
| vol | Volumetric |
| w | Wall |