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Added cp0 and dpdT|rho for REFPROP backend for use in PDSim

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Signed-off-by: Ian Bell <ian.h.bell@gmail.com>
This commit is contained in:
Ian Bell
2014-09-18 19:16:52 +02:00
parent b433dde061
commit 5dcf810f0b
2 changed files with 24 additions and 0 deletions
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20
src/Backends/REFPROP/REFPROPMixtureBackend.cpp
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@@ -770,6 +770,26 @@ void REFPROPMixtureBackend::calc_phase_envelope(const std::string &type)
&ierr, herr, errormessagelength); // Error message
if (ierr > 0) { throw ValueError(format("%s",herr).c_str()); }
}
long double REFPROPMixtureBackend::calc_cpmolar_idealgas(void)
{
double rho_mol_L = 0.001*_rhomolar;
double p0, e0, h0, s0, cv0, cp0, w0, A0, G0;
THERM0dll(&_T,&rho_mol_L,&(mole_fractions[0]),&p0,&e0,&h0,&s0,&cv0,&cp0,&w0,&A0,&G0);
return static_cast<long double>(cp0);
}
long double REFPROPMixtureBackend::calc_first_partial_deriv(parameters Of, parameters Wrt, parameters Constant)
{
if (Of == iP && Wrt == iT && (Constant == iDmolar || Constant == iDmass))
{
double rho_mol_L = 0.001*_rhomolar;
double dpt;
DPDTdll(&_T, &rho_mol_L, &(mole_fractions[0]), &dpt);
return static_cast<long double>(dpt*1000);
}
else{
throw ValueError(format("These derivative terms are not supported"));
}
}
void REFPROPMixtureBackend::update(CoolProp::input_pairs input_pair, double value1, double value2)
{

4
src/Backends/REFPROP/REFPROPMixtureBackend.h
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@@ -55,6 +55,10 @@ public:
/// Returns true if REFPROP is supported on this platform
bool REFPROP_supported(void);
long double calc_cpmolar_idealgas(void);
long double calc_first_partial_deriv(parameters Of, parameters Wrt, parameters Constant);
/// Set the fluids in REFPROP DLL by calling the SETUPdll function
/**