Table 1
Input parameters of example calculations.
| Type of substance | R403B | CO2 | |
|---|---|---|---|
| Extinguishing agent | |||
| Mass | m0 e [kg] | 10 | 6 |
| Initial temperature | T0 e [K] | 278 | 278 |
| Initial pressure | p0 e [barA] | 40 | 100 |
| Mass flow rate |  [kg/s] |
0.333 | 0.2 |
| Release time | τ [s] | 30 | 30 |
| Specific gas constant | re [J/kg/K] | 80.52 | 188.92 |
| Air in the room | |||
| Initial pressure | p0 r [bar] | 1.013 | |
| Initial temperature | T0 r [K] | 288 | |
| Room volume | Vr [m3] | 12.6 | |
| Specific heat | cpr [J/kg/K] | 1005 | |
| Specific gas constant | rr [J/kg/K] | 286.9 | |
| Density | ρr [kg/m3] | 1.226 | |
| Mass | mr [kg] | 18.39 | |
| Heat from metal | |||
| Thin profile thickness | t [m] | 0.0015 | |
| Mass | mm [kg] | 18 | |
| Heat transfer coeff. | h [W/m2/K] | 50 | |
| Density | ρm [kg/m3] | 2700 | |
| Specific heat | cm [J/kg/K] | 897 | |
| Exposed area equivalent | Am [m2] | 4.44 | |
| Leakage | |||
| 0th order leak. curve coeff. | c0[L/s] | 0 | |
| 1st order leak. curve coeff. | c1[L/s/mbar] | 0.38 | |
| 2nd order leak. curve coeff. | c2[L/s/mbar2] | 0.19 | |
| Inflow equiv. nozzle area | A [m2] | 0.0002 | |
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