| SI.HeatFlowRate | Q_d_des | 536.246e6 | Design Heat Flow Rate |
| SI.Temperature | T_Na1_des | 740 + 273.15 | Desing Sodium Hot Fluid Temperature |
| SI.Temperature | T_MS1_des | 500 + 273.15 | Desing Molten Salt Cold Fluid Temperature |
| SI.Temperature | T_MS2_des | 720 + 273.15 | Desing Molten Salt Hot Fluid Temperature |
| SI.Pressure | p_Na1_des | 101325 | Design Sodium Inlet Pressure |
| SI.Pressure | p_MS1_des | 101325 | Design Molten Salt Inlet Pressure |
| SI.Temperature | T_Na2_input | 520 + 273.15 | Optimal outlet sodium temperature |
| Boolean | ratio_cond | true | Activate ratio constraint |
| Real | ratio_max | 10 | Maximum L/D_s ratio |
| Boolean | L_max_cond | false | Activate maximum HX length constraint |
| SI.Length | L_max_input | 1 | Maximum HX length |
| Boolean | optimize_and_run | true | |
| SI.Length | d_o_input | 0.00635 | Optimal Outer Tube Diameter |
| Integer | N_p_input | 1 | Optimal Tube passes number |
| Integer | layout_input | 2 | Optimal Tube Layout |
| FI.EnergyPrice_kWh | c_e | 0.13/0.9175 | Power cost |
| Real | r | 0.05 | Real interest rate |
| Real | H_y | 4500 | Operating hours |
| Integer | n | 30 | Operating years |
| SI.MassFlowRate | m_flow_Na_design | | Sodium mass flow rate |
| SI.MassFlowRate | m_flow_MS_design | | Molten-Salt mass flow rate |
| Real | F_design | | Temperature correction factor |
| SI.ThermalConductance | UA_design | | UA |
| Integer | N_t | | Number of tubes |
| SI.CoefficientOfHeatTransfer | U_design | | Heat tranfer coefficient |
| SI.Area | A_HX | | Exchange Area |
| SI.Pressure | Dp_tube_design | | Tube-side pressure drop |
| SI.Pressure | Dp_shell_design | | Shell-side pressure drop |
| FI.MoneyPerYear | TAC | | Total Annualized Cost |
| SI.CoefficientOfHeatTransfer | h_s_design | | Shell-side Heat tranfer coefficient |
| SI.CoefficientOfHeatTransfer | h_t_design | | Tube-side Heat tranfer coefficient |
| SI.Length | D_s | | Shell Diameter |
| SI.Length | D_s_out | | Outer Shell Diameter |
| Integer | N_baffles | | Number of baffles |
| SI.Length | l_b | | Baffle spacing |
| SI.Velocity | v_Na_design | | Sodium velocity in tubes |
| SI.Velocity | v_max_MS_design | | Molten Salt velocity in shell |
| SI.Volume | V_HX | | Heat-Exchanger Total Volume |
| SI.Mass | m_HX | | Heat-Exchanger Total Mass |
| SI.Mass | m_material_HX | | Heat-Exchanger Material Mass |
| FI.Money_USD | C_BEC_HX | | Bare cost @2018 |
| FI.MoneyPerYear | C_pump_design | | Annual pumping cost |
| Real | ex_eff_design | | HX Exergetic Efficiency |
| Real | en_eff_design | | HX Energetic Efficiency |
| SI.Length | L | | Tube length |
| Real | ratio_HX | | |
| Real | penalty | | |
| FI.AreaPrice | sc_A | | HX Specific Cost - Area |
| FI.MassPrice | sc_m | | HX Specific Cost - Mass |
| Real | sc_cap | | HX Specific Cost - Capacity |
| SI.Length | d_o | | Optimal Outer Tube Diameter |
| Integer | N_p | | Optimal Tube passes number |
| Integer | N_sp | | Optimal Tube passes number |
| Integer | layout | | Optimal Tube Layout |
| SI.Temperature | T_Na2_design | | Optimal outlet sodium temperature |
Medium1