referenceTemperature.H

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/*---------------------------------------------------------------------------*\
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    Copyright (C) 2022 OpenCFD Ltd.
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License
    This file is part of OpenFOAM.
 
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Class
    Foam::heatExchangerModels::referenceTemperature
 
Description
    A heat exchanger model where heat exchange
    is calculated via a temperature table.
 
Usage
    Minimal example by using \c constant/fvOptions:
    \verbatim
    <name>
    {
        // Inherited entries
        ...
 
        // Mandatory entries
        model                    referenceTemperature;
        targetQdot               <Function1<scalar>>;
 
        // Conditional mandatory entries
 
            // Option-1
            Tref                     <scalar>;
 
            // Option-2
            file                     "<word>";
    }
    \endverbatim
 
    where the entries mean:
    \table
      Property  | Description                       | Type  | Reqd | Deflt
      model     | Model name:effectivenessTable     | word  | yes  | -
      targetQdot | Target heat rejection [J/s]                    <!--
                -->                    | Function1<scalar> | yes | -
      Tref      | Reference temperature [K]         | scalar | choice | -
      file      | 2D reference temperature table = function of primary    <!--
                --> mass flow rate [kg/s] and primary flow temperature    <!--
                -->                                 | file   | choice | -
    \endtable
 
    The inherited entries are elaborated in:
      - \link heatExchangerSource.H \endlink
      - \link interpolation2DTable.H \endlink
 
SourceFiles
    referenceTemperature.C
 
\*---------------------------------------------------------------------------*/
 
#ifndef Foam_heatExchangerModels_referenceTemperature_H
#define Foam_heatExchangerModels_referenceTemperature_H
 
#include "heatExchangerModel.H"
#include "interpolation2DTable.H"
#include "Function1.H"
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
namespace Foam
{
namespace heatExchangerModels
{
 
/*---------------------------------------------------------------------------*\
                    Class referenceTemperature Declaration
\*---------------------------------------------------------------------------*/
 
class referenceTemperature
:
    public heatExchangerModel
{
    // Private Data
 
        //- Target heat rejection [J/s]
        autoPtr<Function1<scalar>> targetQdotPtr_;
 
        //- 2D reference temperature table
        //- Function of primary mass flow rate [kg/s]
        //- and primary flow temperature [K]
        autoPtr<interpolation2DTable<scalar>> TrefTablePtr_;
 
        //- Net mass flux [kg/s]
        scalar sumPhi_;
 
        //- Total heat exchange [J/s]
        scalar Qt_;
 
        //- Reference temperature [K]
        scalar Tref_;
 
 
    // Private Member Functions
 
    // Evaluation
 
        //- Return primary-flow net mass flux
        scalar primaryNetMassFlux() const;
 
        //- Return primary-flow inlet temperature
        scalar primaryInletTemperature() const;
 
        //- Return temperature differences
        scalarField temperatureDifferences(const labelList& cells) const;
 
        //- Return interim weights
        scalar weight
        (
            const labelList& cells,
            const scalarField& deltaTCells
        ) const;
 
 
    // I-O
 
        //- Write file header information
        void writeFileHeader(Ostream& os) const;
 
 
public:
 
    //- Runtime type information
    TypeName("referenceTemperature");
 
 
    // Constructors
 
        //- Construct from components
        referenceTemperature
        (
            const fvMesh& mesh,
            const word& name,
            const dictionary& coeffs
        );
 
        //- No copy construct
        referenceTemperature(const referenceTemperature&) = delete;
 
        //- No copy assignment
        void operator=(const referenceTemperature&) = delete;
 
 
    //- Destructor
    virtual ~referenceTemperature() = default;
 
 
    // Member Functions
 
    // Evaluation
 
        //- Initialise data members of the model
        virtual void initialise();
 
        //- Return energy density per unit length [J/m3/m]
        virtual tmp<scalarField> energyDensity(const labelList& cells);
 
 
    // I-O
 
        //- Read top-level dictionary
        virtual bool read(const dictionary& dict);
 
        //- Write data to stream and files
        virtual void write(const bool log);
};
 
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
} // End namespace heatExchangerModels
} // End namespace Foam
 
// * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * //
 
#endif
 
// ************************************************************************* //