modelPartialGasStorage_L2
Extends from TransiEnt.Storage.Gas.Base.PartialGasStorage.
Information
1. Purpose of model
This model represents a compressed gas storage for real gases.
2. Level of detail, physical effects considered, and physical insight
The model consists of a volume, in which the gas located. Pressure losses inside the volume and during charging and discharging are neglected. There is no discretisation of the flow field or the heat transfer. The heat transfer is modelled using a replacable heat transfer model, the default model uses a constant heat transfer coefficient.
3. Limits of validity
The model is only valid for negligible pressure losses and negligible changes of the heat transfer coefficient (other heat transfer models can be used). For high pressures there are errors due to errors in the gas models.
4. Interfaces
gasPortIn and gasPortOut: Real gas input and output
heat: heat port for the heat flow into/out of the storage
p_storage: signal output of the gas pressure
5. Nomenclature
(no elements)
6. Governing Equations
Simple mass and energy balances are used.
7. Remarks for Usage
(no remarks)
8. Validation
No validation necessary because only fundamental equations are used.
9. References
(no remarks)
10. Version History
Model created by Carsten Bode (c.bode@tuhh.de) on Wed Oct 07 2015
Model revised by Carsten Bode (c.bode@tuhh.de) in Apr 2018 (changes due to ClaRa changes: changed parameters)
Parameters
| Type | Name | Default | Description |
|---|---|---|---|
| SI.SpecificEnthalpy | NCV (from PartialGasStorage) | TransiEnt.Basics.Functions.GasProperties.getRealGasNCVVector(medium, medium.nc) | NCV of gas components |
| SI.SpecificEnthalpy | GCV (from PartialGasStorage) | TransiEnt.Basics.Functions.GasProperties.getRealGasGCVVector(medium, medium.nc) | GCV of gas component |
| SI.Diameter | diameter | sqrt(4*V_geo/(pi*height)) | Diameter of storage |
| SI.Area | A_heat | pi/2*diameter^2 + pi*diameter*height | Surface area of storage |
| Fundamental Definitions | |||
| TILMedia.VLEFluidTypes.BaseVLEFluid | medium (from PartialGasStorage) | simCenter.gasModel1 | Medium in the gas storage |
| Boolean | includeHeatTransfer (from PartialGasStorage) | true | consider heat transfer |
| Geometry | |||
| SI.Volume | V_geo (from PartialGasStorage) | 1 | geometric inner volume of the storage cylinder |
| SI.Height | height | 3.779*V_geo^(1/3) | Height of storage |
| Initialization | |||
| SI.Mass | m_gas_start (from PartialGasStorage) | 1e5 | Initial mass in the storage |
| Boolean | start_pressure | true | true if a start pressure is defined, false if a start mass is defined |
| SI.Pressure | p_gas_start | 1e5 | pressure in storage at t=0 |
| SI.ThermodynamicTemperature | T_gas_start | 283.15 | Temperature of gas in storage at t=0 |
| Statistics | |||
| Boolean | calculateCost (from PartialGasStorage) | simCenter.calculateCost | true if cost shall be calculated |
Connectors
Components
| Type | Name | Default | Description |
|---|---|---|---|
| TransiEnt.SimCenter | simCenter (from PartialGasStorage) | ||
| TransiEnt.ModelStatistics | modelStatistics (from PartialGasStorage) | ||
| SI.Mass | m_gas (from PartialGasStorage) | Gas mass | |
| SI.MassFraction[medium.nc - 1] | xi_gas (from PartialGasStorage) | Gas composition | |
| SI.EnergyFlowRate | H_flow_in_NCV (from PartialGasStorage) | Inflowing enthalpy flow based on NCV | |
| SI.EnergyFlowRate | H_flow_out_NCV (from PartialGasStorage) | Inflowing enthalpy flow based on NCV | |
| SI.Enthalpy | H_gas_NCV (from PartialGasStorage) | Enthalpy of the gas bulk based on NCV | |
| SI.EnergyFlowRate | H_flow_in_GCV (from PartialGasStorage) | Inflowing enthalpy flow based on GCV | |
| SI.EnergyFlowRate | H_flow_out_GCV (from PartialGasStorage) | Inflowing enthalpy flow based on GCV | |
| SI.Enthalpy | H_gas_GCV (from PartialGasStorage) | Enthalpy of the gas bulk based on GCV | |
| HeatTransfer | heatTransfer |
Contents
| Name | Description |
|---|---|