.TransiEnt.Producer.Combined.LargeScaleCHP.ContinuousCHP

Simple large CHP model with plant limits, time constants and fuel input matrix but without distinc operating states (always running)

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

(no remarks)

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

(no remarks)

6. Governing Equations

(no remarks)

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

(no remarks)

10. Version History

Ricardo Peniche, 2016

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

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