| Units.SI.Length | L | 1 | Exchanger length |
| Units.SI.Position | z1 | 0 | Exchanger inlet altitude |
| Units.SI.Position | z2 | 0 | Exchanger outlet altitude |
| Real | rugosrel_int | 0.0007 | Internal relative roughness |
| Real | rugosrel_ext | 0.0007 | External relative roughness |
| Units.SI.Diameter | Dint | 0.1 | Internal diameter |
| Units.SI.Diameter | Dext | 0.11 | External diameter |
| Integer | Ntubes | 1 | Number of pipes in parallel |
| Units.SI.Thickness | e | 2.e-3 | Wall thickness |
| Units.SI.ThermalConductivity | lambda | 26 | Wall thermal conductivity |
| Units.SI.SpecificHeatCapacity | cpw | 1000 | Wall specific heat capacity (active if dynamic_energy_balance=true) |
| Units.SI.Density | rhow | 7800 | Wall density (active if dynamic_energy_balance=true) |
| Integer | Ns | 1 | Number of segments |
| Units.SI.AbsolutePressure | P0 | 1.e5 | Fluid initial pressure (active if steady_state = false and option_temperature=true) |
| Units.SI.Temperature[Ns] | T0 | fill(290, Ns) | Initial fluid temperature (active if steady_state = false and option_temperature=true) |
| Units.SI.SpecificEnthalpy[Ns] | h0 | fill(1e5, Ns) | Initial fluid specific enthalpy (active if steady_state = false and option_temperature=false) |
| Boolean | inertia | true | true: momentum balance equation with inertia - false: without inertia |
| Boolean | advection | false | true: momentum balance equation with advection terme - false: without advection terme |
| Boolean | dynamic_energy_balance | true | true: dynamic energy balance equation - false: static energy balance equation |
| Boolean | dynamic_mass_balance | true | true: dynamic mass balance equation - false: static mass balance equation (active if dynamic_energy_balance=true) |
| Boolean | simplified_dynamic_energy_balance | true | true: simplified dynamic energy balance equation - false: full dynamic energy balance equation (active if dynamic_energy_balance=true and dynamic_mass_balance=true) |
| Boolean | steady_state | true | true: start from steady state - false: start from T0 (if option_temperature = true) or h0 (if option_temperature=false)(active if dynamic_energy_balance=true) |
| Boolean | option_temperature | true | true: initial temperature is fixed - false: initial specific enthalpy is fixed (active if steady_state=false) |
| Boolean | continuous_flow_reversal | false | true: continuous flow reversal - false: discontinuous flow reversal |
| Boolean | diffusion | false | true: energy balance equation with diffusion - false: energy balance equation without diffusion |
| Fluid › Fluid properties |
| IF97Region | region | IF97Region.All_regions | IF97 region (active for IF97 water/steam only) |
