modelControllerH2OForReformer_StoCbeforeSMR
Extends from Base.PartialControllerH2OForReformer (Controller to control the water mass flow rate for the prereformer and steam methane reformer).
Information
1. Purpose of model
This is a controller to control the steam mass flow rate for a steam methane reformer to ensure a given molar steam to methane ratio at the inlet of the steam methane reformer.
2. Level of detail, physical effects considered, and physical insight
The composition and mass flow rate of the feed are measured and the necessary steam mass flow rate is calculated depending on the expected reactions in the prereformer.
3. Limits of validity
The validity is limited because the composition is measured ideally and continuously which is not possible in reality.
4. Interfaces
m_flow_feed: input for the feed mass flow rate in [kg/s]
xi: input for the mass fractions of the feed [kg/kg]
m_flow_steam: output for the steam mass flow rate (positive sign) [kg/s]
5. Nomenclature
(no remarks)
6. Governing Equations
The steam mass flow rate is calculated under consideration of the steam that will be consumed by decomposing C2H6, C3H8 and C4H10 in the prereformer and the desired steam to methane molar ratio.
7. Remarks for Usage
(no remarks)
8. Validation
(no remarks)
9. References
(no remarks)
10. Version History
Model created by Carsten Bode (c.bode@tuhh.de) on Tue Apr 05 2016
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.MolarMass | M_H2O (from PartialControllerH2OForReformer) | 0.01802 | |
| SI.MolarMass | M_CH4 (from PartialControllerH2OForReformer) | 0.01604 | |
| SI.MolarMass | M_C2H6 (from PartialControllerH2OForReformer) | 0.03007 | |
| SI.MolarMass | M_C3H8 (from PartialControllerH2OForReformer) | 0.04410 | |
| SI.MolarMass | M_C4H10 (from PartialControllerH2OForReformer) | 0.05812 | |
| TransiEnt.Basics.Media.Gases.VLE_VDIWA_NG7_SG_var | vle_ng7_sg (from PartialControllerH2OForReformer) |
Connectors
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.Basics.Interfaces.General.MassFractionIn[vle_ng7_sg.nc] | xi (from PartialControllerH2OForReformer) | Mass composition of the feed before adding water or hydrogen | |
| TransiEnt.Basics.Interfaces.General.MassFlowRateIn | m_flow_feed (from PartialControllerH2OForReformer) | Feed mass flow rate before adding water or hydrogen | |
| Modelica.Blocks.Interfaces.RealInput | desiredMolarRatio (from PartialControllerH2OForReformer) | Desired molar ratio of H2O to CH4 at the inlet of the SMR | |
| TransiEnt.Basics.Interfaces.General.MassFlowRateOut | m_flow_steam (from PartialControllerH2OForReformer) | Water mass flow rate that has to be added for given molar ratio |
Components
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.SimCenter | simCenter (from PartialControllerH2OForReformer) |