region3.h

/*

freesteam - IAPWS-IF97 steam tables library
Copyright (C) 2004-2005  John Pye

This program is free software; you can redistribute it and/or
modify it under the terms of the GNU General Public License
as published by the Free Software Foundation; either version 2
of the License, or (at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.

*/

#ifndef REGION3_H
#define REGION3_H

#include "state.h"
#include "zeroin.h"

#define REG3_DENS_REF RHO_CRIT  // kg/m³
#define REG3_TEMP_REF T_CRIT    // K

class Region3:public SteamState {

        public:
                int getRegion() const;

                SpecificVolume specvol(const SteamCalculator &c) const;
                SpecificEnergy specienergy(const SteamCalculator &c) const;
                SpecificEntropy specentropy(const SteamCalculator &c) const;
                SpecificEnergy specenthalpy(const SteamCalculator &c) const;
                SpecHeatCap speccp(const SteamCalculator &c) const;
                SpecHeatCap speccv(const SteamCalculator &c) const;

                Pressure pres(const SteamCalculator &c) const;
                Density dens(const SteamCalculator &c) const;

                Temperature temp(const SteamCalculator &c) const;

        protected:
                friend class SteamCalculator;

                static SteamState *Instance();

                virtual void set_pT(SteamCalculator &c, const Pressure &p, const Temperature &T, Num x);

        private:

                Region3();
                static Region3 *_instance;

                Num phi(const SteamCalculator &c) const;
                Num phidel(const SteamCalculator &c) const;
                Num phideldel(const SteamCalculator &c) const;
                Num phitau(const SteamCalculator &c) const;
                Num phitautau(const SteamCalculator &c) const;
                Num phideltau(const SteamCalculator &c) const;

                Num pitau_iaps85(const SteamCalculator &c) const;
                Num delpi_iaps85(const SteamCalculator &c) const;

};

#endif

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