.TransiEnt.Producer.Combined.LargeScaleCHP.ContinuousCHP

Information

1. Purpose of model

This model represents the simplest of all large scale CHP models in the library. It allows a quick representation of a CHP plant with three main characteristics:

• Plant's operation limits
• Plant's fuel input requirements based on electricity and heating outputs
• Time delay between the plant's set point values and actual production values

This component extends from the base class TransiEnt.Producer.Combined.LargeScaleCHPpackage.Base.BaseLargeScaleCHP.

2. Level of detail, physical effects considered, and physical insight

(no remarks)

3. Limits of validity

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4. Interfaces

P_set: input for Power in [W]

Q_flow_set: input for heat flow rate in [W]

outlet: FluidPortOut

inlet: FluidPortIn

gasPortIn: RealGasPortIn

eye: Eyeout

epp: choice of power port

5. Nomenclature

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6. Governing Equations

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7. Remarks for Usage

Two things are required for using this component: parametrisation and set-value definition

The parametrisation of this component consists of the following steps:

• C-Value: this corresponds to the power to heat ratio, defined as P_CHP/Q_useful. Common values can be taken from [1]
• PQ-Boundaries: select a record representing the plant's PQ-boundaries as defined in the package: TransiEnt.Producer.Combined.LargeScaleCHPpackage.Base.PQboundariesPackage
• Q_flow_input_PQDiagram: select a text file containing the fuel input matrix as defined in the component: TransiEnt.Distribution.Heat.HeatGridControl.HeatInput_f_PQ
• Q_max: maximum heat flow output (default: value is automatically taken from the PQ-Boundaries)

Cascading CHP-plants:

Via parameter 'quantity' the whole CHP-plant is devided into several cascading CHP-plants which start up after one another. This implementation repeats the characteristic PQ-field several times. In total, the nominal electrical and thermal power add up to the nominal electrical and thermal power the whole CHP-plant. This is a way for a simple representation of several CHP-plants without having to model several instances of a CHP-plant-model.

8. Validation

(no remarks)

9. References

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10. Version History

Ricardo Peniche, 2016

Model modified by Oliver Schülting (oliver.schuelting@tuhh.de) in Nov 2018: added gasPort