TABLE OF CONTENTS | A | Heat transfer area (m 2) |
| C P | Specific heat capacity (kJ/kgK) |
| COP p | Coefficient of performance for a heat pump (-) |
| COP r | Coefficient of performance for a refrigerator (-) |
| CP | Heat capacity flowrate (kW/K) |
| H | Flow enthalpy (kW) |
| ? H | Change in flow enthalpy (kW) |
| ? H com | Heat of combustion (kJ/kg) |
| h | Specific enthalpy (kJ/kg) |
| h | Film heat transfer coefficient of an individual stream (kW/m 2K) |
| k, K | Number of temperature intervals or segments (-) |
| L | Number of loops in a network (-) |
| m, ? | Mass flowrate (kg/s) |
| N | Number of process streams plus utilities, or process stream branches (-) |
| Q | Heat flow (kW) |
| Q Hmin | Minimum feasible hot utility (kW) |
| Q Cmin | Minimum feasible cold utility (kW) |
| q | Heat flow of an individual stream (kW) |
| S | Entropy (kJ/kgK) |
| s | Number of separate components (subsets) in a network (-) |
| S | Shifted temperature ( C or K) |
| S S | Shifted supply temperature of process stream ( C or K) |
| S T | Shifted target temperature of process stream ( C or K) |
| T | Temperature ( C or K) |
| T S | Supply temperature of process stream ( C or K) |
| T T | Target temperature of process stream ( C or K) |
| ? T | Temperature difference (K) |
| ? T cont | ? T min contribution of an individual stream (K) |
| ? T min | Minimum allowed temperature difference (K) |
| ? T threshold | Boundary value of ? T min between a threshold and pinched problem (K) |
| ? T |
