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IF97_interface.C
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#include "IF97.h"
#include "IF97_helper.h"
#include "SurfaceTension.h"
#include "Viscosity.h"
#include "ThermalConductivity.h"
#include "IF97_interface.h"
double T_sat_from_p(double p)
{
checkPSatValid(p);
return R4_T_sat_from_p(p);
}
double p_sat_from_T(double T)
{
checkTSatValid(T);
return R4_p_sat_from_T(T);
}
double v_l_sat_from_T(double T)
{
return 1.0 / rho_l_sat_from_T(T); /* This will check if T is valid */
}
double rho_l_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return 1.0 / R1_specific_volume(R4_p_sat_from_T(T), T);
else
return R3_rho_l_sat_from_T_ITER(T);
}
double e_l_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return R1_specific_int_energy(R4_p_sat_from_T(T), T);
else
return R3_specific_int_energy(R3_rho_l_sat_from_T_ITER(T), T);
}
double h_l_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return R1_specific_enthalpy(R4_p_sat_from_T(T), T);
else
return R3_specific_enthalpy(R3_rho_l_sat_from_T_ITER(T), T);
}
double s_l_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return R1_specific_entropy(R4_p_sat_from_T(T), T);
else
return R3_specific_entropy(R3_rho_l_sat_from_T_ITER(T), T);
}
double cv_l_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return R1_cv(R4_p_sat_from_T(T), T);
else
return R3_cv(R3_rho_l_sat_from_T_ITER(T), T);
}
double cp_l_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return R1_cp(R4_p_sat_from_T(T), T);
else
return R3_cp(R3_rho_l_sat_from_T_ITER(T), T);
}
double c_l_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return R1_sound_speed(R4_p_sat_from_T(T), T);
else
return R3_sound_speed(R3_rho_l_sat_from_T_ITER(T), T);
}
double k_l_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return thermal_conductivity_R1(R4_p_sat_from_T(T), T);
else
return thermal_conductivity_R3(R3_rho_l_sat_from_T_ITER(T), T);
}
double mu_l_sat_from_T(double T)
{
double rho_l_sat = rho_l_sat_from_T(T); /* This will check if T is valid */
return viscosity(rho_l_sat, T);
}
void liquid_sat_properties_from_T(double T, double * p, double * v, double * rho, double * e, double * h,
double * s, double * cv, double * cp, double * c, double * k, double * mu)
{
checkTSatValid(T);
double p_val = R4_p_sat_from_T(T);
double rho_val = rho_l_sat_from_T(T);
if (p != NULL) *p = p_val;
if (v != NULL) *v = 1.0 / rho_val;
if (rho != NULL) *rho = rho_val;
if (mu != NULL) *mu = viscosity(rho_val, T);
if (T <= IF97_T_13)
{
if (e != NULL) *e = R1_specific_int_energy(p_val, T);
if (h != NULL) *h = R1_specific_enthalpy(p_val, T);
if (s != NULL) *s = R1_specific_entropy(p_val, T);
if (cv != NULL) *cv = R1_cv(p_val, T);
if (cp != NULL) *cp = R1_cp(p_val, T);
if (c != NULL) *c = R1_sound_speed(p_val, T);
if (k != NULL) *k = thermal_conductivity_R1(p_val, T);
}
else
{
if (e != NULL) *e = R3_specific_int_energy(rho_val, T);
if (h != NULL) *h = R3_specific_enthalpy(rho_val, T);
if (s != NULL) *s = R3_specific_entropy(rho_val, T);
if (cv != NULL) *cv = R3_cv(rho_val, T);
if (cp != NULL) *cp = R3_cp(rho_val, T);
if (c != NULL) *c = R3_sound_speed(rho_val, T);
if (k != NULL) *k = thermal_conductivity_R3(rho_val, T);
}
}
double v_g_sat_from_T(double T)
{
return 1.0 / rho_g_sat_from_T(T); /* This will check if T is valid */
}
double rho_g_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= 623.15)
return 1.0 / R2_specific_volume(R4_p_sat_from_T(T), T);
else
return R3_rho_g_sat_from_T_ITER(T);
}
double e_g_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return R2_specific_int_energy(R4_p_sat_from_T(T), T);
else
return R3_specific_int_energy(R3_rho_g_sat_from_T_ITER(T), T);
}
double h_g_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return R2_specific_enthalpy(R4_p_sat_from_T(T), T);
else
return R3_specific_enthalpy(R3_rho_g_sat_from_T_ITER(T), T);
}
double s_g_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return R2_specific_entropy(R4_p_sat_from_T(T), T);
else
return R3_specific_entropy(R3_rho_g_sat_from_T_ITER(T), T);
}
double cv_g_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return R2_cv(R4_p_sat_from_T(T), T);
else
return R3_cv(R3_rho_g_sat_from_T_ITER(T), T);
}
double cp_g_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return R2_cp(R4_p_sat_from_T(T), T);
else
return R3_cp(R3_rho_g_sat_from_T_ITER(T), T);
}
double c_g_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return R2_sound_speed(R4_p_sat_from_T(T), T);
else
return R3_sound_speed(R3_rho_g_sat_from_T_ITER(T), T);
}
double k_g_sat_from_T(double T)
{
checkTSatValid(T);
if (T <= IF97_T_13)
return thermal_conductivity_R2(R4_p_sat_from_T(T), T);
else
return thermal_conductivity_R3(R3_rho_g_sat_from_T_ITER(T), T);
}
double mu_g_sat_from_T(double T)
{
double rho_g_sat = rho_g_sat_from_T(T); /* This will check if T is valid */
return viscosity(rho_g_sat, T);
}
void vapor_sat_properties_from_T(double T, double * p, double * v, double * rho, double * e, double * h,
double * s, double * cv, double * cp, double * c, double * k, double * mu)
{
checkTSatValid(T);
double p_val = R4_p_sat_from_T(T);
double rho_val = rho_g_sat_from_T(T);
if (p != NULL) *p = p_val;
if (v != NULL) *v = 1.0 / rho_val;
if (rho != NULL) *rho = rho_val;
if (mu != NULL) *mu = viscosity(rho_val, T);
if (T <= IF97_T_13)
{
if (e != NULL) *e = R2_specific_int_energy(p_val, T);
if (h != NULL) *h = R2_specific_enthalpy(p_val, T);
if (s != NULL) *s = R2_specific_entropy(p_val, T);
if (cv != NULL) *cv = R2_cv(p_val, T);
if (cp != NULL) *cp = R2_cp(p_val, T);
if (c != NULL) *c = R2_sound_speed(p_val, T);
if (k != NULL) *k = thermal_conductivity_R2(p_val, T);
}
else
{
if (e != NULL) *e = R3_specific_int_energy(rho_val, T);
if (h != NULL) *h = R3_specific_enthalpy(rho_val, T);
if (s != NULL) *s = R3_specific_entropy(rho_val, T);
if (cv != NULL) *cv = R3_cv(rho_val, T);
if (cp != NULL) *cp = R3_cp(rho_val, T);
if (c != NULL) *c = R3_sound_speed(rho_val, T);
if (k != NULL) *k = thermal_conductivity_R3(rho_val, T);
}
}
/***************************************************************
* Saturation properties by p
***************************************************************/
double v_l_sat_from_p(double p)
{
double T_sat = T_sat_from_p(p); // This will check if p is valid
return v_l_sat_from_T(T_sat);
}
double rho_l_sat_from_p(double p)
{
return rho_l_sat_from_T(T_sat_from_p(p));
}
double e_l_sat_from_p(double p)
{
return e_l_sat_from_T(T_sat_from_p(p));
}
double h_l_sat_from_p(double p)
{
return h_l_sat_from_T(T_sat_from_p(p));
}
double s_l_sat_from_p(double p)
{
return s_l_sat_from_T(T_sat_from_p(p));
}
double cv_l_sat_from_p(double p)
{
return cv_l_sat_from_T(T_sat_from_p(p));
}
double cp_l_sat_from_p(double p)
{
return cp_l_sat_from_T(T_sat_from_p(p));
}
double c_l_sat_from_p(double p)
{
return c_l_sat_from_T(T_sat_from_p(p));
}
double k_l_sat_from_p(double p)
{
return k_l_sat_from_T(T_sat_from_p(p));
}
double mu_l_sat_from_p(double p)
{
return mu_l_sat_from_T(T_sat_from_p(p));
}
void liquid_sat_properties_from_p(double p, double * T, double * v, double * rho, double * e, double * h,
double * s, double * cv, double * cp, double * c, double * k, double * mu)
{
double T_val = T_sat_from_p(p); // This will check if p is valid
double rho_val = rho_l_sat_from_T(T_val);
if (T != NULL) *T = T_val;
if (v != NULL) *v = 1.0 / rho_val;
if (rho != NULL) *rho = rho_val;
if (mu != NULL) *mu = viscosity(rho_val, T_val);
if (T_val <= IF97_T_13)
{
if (e != NULL) *e = R1_specific_int_energy(p, T_val);
if (h != NULL) *h = R1_specific_enthalpy(p, T_val);
if (s != NULL) *s = R1_specific_entropy(p, T_val);
if (cv != NULL) *cv = R1_cv(p, T_val);
if (cp != NULL) *cp = R1_cp(p, T_val);
if (c != NULL) *c = R1_sound_speed(p, T_val);
if (k != NULL) *k = thermal_conductivity_R1(p, T_val);
}
else
{
if (e != NULL) *e = R3_specific_int_energy(rho_val, T_val);
if (h != NULL) *h = R3_specific_enthalpy(rho_val, T_val);
if (s != NULL) *s = R3_specific_entropy(rho_val, T_val);
if (cv != NULL) *cv = R3_cv(rho_val, T_val);
if (cp != NULL) *cp = R3_cp(rho_val, T_val);
if (c != NULL) *c = R3_sound_speed(rho_val, T_val);
if (k != NULL) *k = thermal_conductivity_R3(rho_val, T_val);
}
}
double v_g_sat_from_p(double p)
{
return v_g_sat_from_T(T_sat_from_p(p));
}
double rho_g_sat_from_p(double p)
{
return rho_g_sat_from_T(T_sat_from_p(p));
}
double e_g_sat_from_p(double p)
{
return e_g_sat_from_T(T_sat_from_p(p));
}
double h_g_sat_from_p(double p)
{
return h_g_sat_from_T(T_sat_from_p(p));
}
double s_g_sat_from_p(double p)
{
return s_g_sat_from_T(T_sat_from_p(p));
}
double cv_g_sat_from_p(double p)
{
return cv_g_sat_from_T(T_sat_from_p(p));
}
double cp_g_sat_from_p(double p)
{
return cp_g_sat_from_T(T_sat_from_p(p));
}
double c_g_sat_from_p(double p)
{
return c_g_sat_from_T(T_sat_from_p(p));
}
double k_g_sat_from_p(double p)
{
return k_g_sat_from_T(T_sat_from_p(p));
}
double mu_g_sat_from_p(double p)
{
return mu_g_sat_from_T(T_sat_from_p(p));
}
void vapor_sat_properties_from_p(double p, double * T, double * v, double * rho, double * e, double * h,
double * s, double * cv, double * cp, double * c, double * k, double * mu)
{
double T_val = T_sat_from_p(p);
double rho_val = rho_g_sat_from_T(T_val);
if (T != NULL) *T = T_val;
if (v != NULL) *v = 1.0 / rho_val;
if (rho != NULL) *rho = rho_val;
if (mu != NULL) *mu = viscosity(rho_val, T_val);
if (T_val <= IF97_T_13)
{
if (e != NULL) *e = R2_specific_int_energy(p, T_val);
if (h != NULL) *h = R2_specific_enthalpy(p, T_val);
if (s != NULL) *s = R2_specific_entropy(p, T_val);
if (cv != NULL) *cv = R2_cv(p, T_val);
if (cp != NULL) *cp = R2_cp(p, T_val);
if (c != NULL) *c = R2_sound_speed(p, T_val);
if (k != NULL) *k = thermal_conductivity_R2(p, T_val);
}
else
{
if (e != NULL) *e = R3_specific_int_energy(rho_val, T_val);
if (h != NULL) *h = R3_specific_enthalpy(rho_val, T_val);
if (s != NULL) *s = R3_specific_entropy(rho_val, T_val);
if (cv != NULL) *cv = R3_cv(rho_val, T_val);
if (cp != NULL) *cp = R3_cp(rho_val, T_val);
if (c != NULL) *c = R3_sound_speed(rho_val, T_val);
if (k != NULL) *k = thermal_conductivity_R3(rho_val, T_val);
}
}
/***************************************************************
* (p, T)-based properties
***************************************************************/
double v_from_pT(double p, double T)
{
int region = locateRegion_from_pT(p, T);
switch (region) {
case 1:
return R1_specific_volume(p, T);
case 2:
return R2_specific_volume(p, T);
case 3:
return 1.0 / R3_rho_from_p_T_ITER(p, T);
case 5:
return R5_specific_volume(p, T);
default:
fprintf(stderr, "%s", "Region not recognized!\n");
exit(1);
return 0.0;
}
//return (*v_func_from_pT_ptr[region - 1])(p, T);
}
double rho_from_pT(double p, double T)
{
int region = locateRegion_from_pT(p, T);
switch (region) {
case 1:
return 1.0 / R1_specific_volume(p, T);
case 2:
return 1.0 / R2_specific_volume(p, T);
case 3:
return R3_rho_from_p_T_ITER(p, T);
case 5:
return 1.0 / R5_specific_volume(p, T);
default:
fprintf(stderr, "%s", "Region not recognized!\n");
exit(1);
return 0.0;
}
//return (*rho_func_from_pT_ptr[region - 1])(p, T);
}
double e_from_pT(double p, double T)
{
int region = locateRegion_from_pT(p, T);
switch (region) {
case 1:
return R1_specific_int_energy(p, T);
case 2:
return R2_specific_int_energy(p, T);
case 3:
return R3_specific_int_energy(R3_rho_from_p_T_ITER(p, T), T);
case 5:
return R5_specific_int_energy(p, T);
default:
fprintf(stderr, "%s", "Region not recognized!\n");
exit(1);
return 0.0;
}
}
double h_from_pT(double p, double T)
{
int region = locateRegion_from_pT(p, T);
switch (region) {
case 1:
return R1_specific_enthalpy(p, T);
case 2:
return R2_specific_enthalpy(p, T);
case 3:
return R3_specific_enthalpy(R3_rho_from_p_T_ITER(p, T), T);
case 5:
return R5_specific_enthalpy(p, T);
default:
fprintf(stderr, "%s", "Region not recognized!\n");
exit(1);
return 0.0;
}
}
double s_from_pT(double p, double T)
{
int region = locateRegion_from_pT(p, T);
switch (region) {
case 1:
return R1_specific_entropy(p, T);
case 2:
return R2_specific_entropy(p, T);
case 3:
return R3_specific_entropy(R3_rho_from_p_T_ITER(p, T), T);
case 5:
return R5_specific_entropy(p, T);
default:
fprintf(stderr, "%s", "Region not recognized!\n");
exit(1);
return 0.0;
}
}
double cv_from_pT(double p, double T)
{
int region = locateRegion_from_pT(p, T);
switch (region) {
case 1:
return R1_cv(p, T);
case 2:
return R2_cv(p, T);
case 3:
return R3_cv(R3_rho_from_p_T_ITER(p, T), T);
case 5:
return R5_cv(p, T);
default:
fprintf(stderr, "%s", "Region not recognized!\n");
exit(1);
return 0.0;
}
}
double cp_from_pT(double p, double T)
{
int region = locateRegion_from_pT(p, T);
switch (region) {
case 1:
return R1_cp(p, T);
case 2:
return R2_cp(p, T);
case 3:
return R3_cp(R3_rho_from_p_T_ITER(p, T), T);
case 5:
return R5_cp(p, T);
default:
fprintf(stderr, "%s", "Region not recognized!\n");
exit(1);
return 0.0;
}
}
double c_from_pT(double p, double T)
{
int region = locateRegion_from_pT(p, T);
switch (region) {
case 1:
return R1_sound_speed(p, T);
case 2:
return R2_sound_speed(p, T);
case 3:
return R3_sound_speed(R3_rho_from_p_T_ITER(p, T), T);
case 5:
return R5_sound_speed(p, T);
default:
fprintf(stderr, "%s", "Region not recognized!\n");
exit(1);
return 0.0;
}
}
double k_from_pT(double p, double T)
{
int region = locateRegion_from_pT(p, T);
switch (region) {
case 1:
return thermal_conductivity_R1(p, T);
case 2:
return thermal_conductivity_R2(p, T);
case 3:
return thermal_conductivity_R3(R3_rho_from_p_T_ITER(p, T), T);
case 5:
return thermal_conductivity_R5(p, T);
default:
fprintf(stderr, "%s", "Region not recognized!\n");
exit(1);
return 0.0;
}
}
double mu_from_pT(double p, double T)
{
double rho = rho_from_pT(p, T);
return viscosity(rho, T);
}
void properties_from_pT(double p, double T, double * v, double * rho, double * e, double * h,
double * s, double * cv, double * cp, double * c, double * k, double * mu)
{
int region = locateRegion_from_pT(p, T);
switch (region) {
case 1:
{
double v_val = R1_specific_volume(p, T);
if (v != NULL) *v = v_val;
if (rho != NULL) *rho = 1.0 / v_val;
if (e != NULL) *e = R1_specific_int_energy(p, T);
if (h != NULL) *e = R1_specific_enthalpy(p, T);
if (s != NULL) *s = R1_specific_entropy(p, T);
if (cv != NULL) *cv = R1_cv(p, T);
if (cp != NULL) *cp = R1_cp(p, T);
if (c != NULL) *c = R1_sound_speed(p, T);
if (k != NULL) *k = thermal_conductivity_R1(p, T);
if (mu != NULL) *mu = mu_from_pT(p, T); // should have mu_from_rhoT
}
break;
case 2:
{
double v_val = R2_specific_volume(p, T);
if (v != NULL) *v = v_val;
if (rho != NULL) *rho = 1.0 / v_val;
if (e != NULL) *e = R2_specific_int_energy(p, T);
if (h != NULL) *e = R2_specific_enthalpy(p, T);
if (s != NULL) *s = R2_specific_entropy(p, T);
if (cv != NULL) *cv = R2_cv(p, T);
if (cp != NULL) *cp = R2_cp(p, T);
if (c != NULL) *c = R2_sound_speed(p, T);
if (k != NULL) *k = thermal_conductivity_R2(p, T);
if (mu != NULL) *mu = mu_from_pT(p, T); // should have mu_from_rhoT
}
break;
case 3:
{
double rho_val = R3_rho_from_p_T_ITER(p, T);
if (v != NULL) *v = 1.0 / rho_val;
if (rho != NULL) *rho = rho_val;
if (e != NULL) *e = R3_specific_int_energy(rho_val, T);
if (h != NULL) *e = R3_specific_enthalpy(rho_val, T);
if (s != NULL) *s = R3_specific_entropy(rho_val, T);
if (cv != NULL) *cv = R3_cv(rho_val, T);
if (cp != NULL) *cp = R3_cp(rho_val, T);
if (c != NULL) *c = R3_sound_speed(rho_val, T);
if (k != NULL) *k = thermal_conductivity_R3(rho_val, T);
if (mu != NULL) *mu = mu_from_pT(p, T); // should have mu_from_rhoT
}
break;
case 5:
{
double v_val = R5_specific_volume(p, T);
if (v != NULL) *v = v_val;
if (rho != NULL) *rho = 1.0 / v_val;
if (e != NULL) *e = R5_specific_int_energy(p, T);
if (h != NULL) *e = R5_specific_enthalpy(p, T);
if (s != NULL) *s = R5_specific_entropy(p, T);
if (cv != NULL) *cv = R5_cv(p, T);
if (cp != NULL) *cp = R5_cp(p, T);
if (c != NULL) *c = R5_sound_speed(p, T);
if (k != NULL) *k = thermal_conductivity_R5(p, T);
if (mu != NULL) *mu = mu_from_pT(p, T); // should have mu_from_rhoT
}
break;
default:
fprintf(stderr, "%s", "Region not recognized!\n");
exit(1);
}
}
/***************************************************************
* (p, h)-based properties
***************************************************************/
int locateRegion_from_ph(double p, double h)
{
// 21 -> 2a; 22 -> 2b; 23 -> 2c.
if (p < IF97_SAT_P_MIN)
{
if (h < R2_specific_enthalpy(p, IF97_T_MIN))
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h < h(p, 273.15K)!\n");
return -1;
}
else if (h < R2_specific_enthalpy(p, IF97_T_25))
return 21;
else if (h < R5_specific_enthalpy(p, IF97_T_MAX))
return 5;
else
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h > h(p, 2273.15K)!\n");
return -2;
}
}
else if (p < 4.0e6) // boundary between 2a and 2b (see page 21, Ref. [1])
{
if (h < R1_specific_enthalpy(p, IF97_T_MIN))
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h < h(p, 273.15K)!\n");
return -1;
}
else if (h < h_l_sat_from_p(p))
return 1;
else if (h < h_g_sat_from_p(p))
return 4;
else if (h < R2_specific_enthalpy(p, IF97_T_25))
return 21;
else if (h < R5_specific_enthalpy(p, IF97_T_MAX))
return 5;
else
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h > h(p, 2273.15K)!\n");
return -2;
}
}
else if (p < 6.5467e6) // where 2b-2c boundary line intersects with saturation line, (see page 21, Ref. [1])
{
if (h < R1_specific_enthalpy(p, IF97_T_MIN))
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h < h(p, 273.15K)!\n");
return -1;
}
else if (h < h_l_sat_from_p(p))
return 1;
else if (h < h_g_sat_from_p(p))
return 4;
else if (h < R2_specific_enthalpy(p, IF97_T_25))
return 22;
else if (h < R5_specific_enthalpy(p, IF97_T_MAX))
return 5;
else
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h > h(p, 2273.15K)!\n");
return -2;
}
}
else if (p < 1.65291643e7) // where 2-3 boundary line intersects with saturation line, (see page 6, Ref. [1])
{
if (h < R1_specific_enthalpy(p, IF97_T_MIN))
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h < h(p, 273.15K)!\n");
return -1;
}
else if (h < h_l_sat_from_p(p))
return 1;
else if (h < h_g_sat_from_p(p))
return 4;
else if (h < B2bc_h_from_p(p))
return 23;
else if (h < R2_specific_enthalpy(p, IF97_T_25))
return 22;
else if (h < R5_specific_enthalpy(p, IF97_T_MAX))
return 5;
else
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h > h(p, 2273.15K)!\n");
return -2;
}
}
else if (p < P_CRIT)
{
if (h < R1_specific_enthalpy(p, IF97_T_MIN))
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h < h(p, 273.15K)!\n");
return -1;
}
else if (h < R1_specific_enthalpy(p, IF97_T_13))
return 1;
else if (h < h_l_sat_from_p(p))
return 3;
else if (h < h_g_sat_from_p(p))
return 4;
else if (h < R2_specific_enthalpy(p, B23_T_from_p(p)))
return 3;
else if (h < B2bc_h_from_p(p))
return 23;
else if (h < R2_specific_enthalpy(p, IF97_T_25))
return 22;
else if (h < R5_specific_enthalpy(p, IF97_T_MAX))
return 5;
else
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h > h(p, 2273.15K)!\n");
return -2;
}
}
else if (p <= 50.0e6)
{
if (h < R1_specific_enthalpy(p, IF97_T_MIN))
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h < h(p, 273.15K)!\n");
return -1;
}
else if (h < R1_specific_enthalpy(p, IF97_T_13))
return 1;
else if (h < R2_specific_enthalpy(p, B23_T_from_p(p)))
return 3;
else if (h < B2bc_h_from_p(p))
return 23;
else if (h < R2_specific_enthalpy(p, IF97_T_25))
return 22;
else if (h < R5_specific_enthalpy(p, IF97_T_MAX))
return 5;
else
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h > h(p, 2273.15K)!\n");
return -2;
}
}
else if (p <= IF97_P_MAX)
{
if (h < R1_specific_enthalpy(p, IF97_T_MIN))
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h < h(p, 273.15K)!\n");
return -1;
}
else if (h < R1_specific_enthalpy(p, IF97_T_13))
return 1;
else if (h < R2_specific_enthalpy(p, B23_T_from_p(p)))
return 3;
else if (h < B2bc_h_from_p(p))
return 23;
else if (h < R2_specific_enthalpy(p, IF97_T_25))
return 22;
else
{
fprintf(stderr, "p = %f; h = %f\n", p, h);
fprintf(stderr, "Out of range: h > h(p, 1073.15K)!\n");
return -4;
}
}
else
{
return -3;
}
}
double x_from_ph(double p, double h)
{
double x = 0.0;
if (p > P_CRIT)
x = 0.0; // Let x = 0 for both single-phase liquid and supercritical region
else
{
double h_l_sat = h_l_sat_from_p(p);
double h_g_sat = h_g_sat_from_p(p);
if (h < h_l_sat)
x = 0.0;
else if (h > h_g_sat)
x = 1.0;
else
x = (h - h_l_sat) / (h_g_sat - h_l_sat);
}
return x;
}
double v_from_ph(double p, double h)
{
int region = locateRegion_from_ph(p, h);
switch (region) {
case 1:
return R1_specific_volume(p, R1_T_from_p_h(p, h));
case 21:
return R2_specific_volume(p, R2a_T_from_p_h(p, h));
case 22:
return R2_specific_volume(p, R2b_T_from_p_h(p, h));
case 23:
return R2_specific_volume(p, R2c_T_from_p_h(p, h));
case 3:
{
double rho = 0.0, T = 0.0, x = 0.0;
R3_rho_T_x_from_p_h_ITER(p, h, rho, T, x); /* This function covers Region 3 and the subsetion of 4 within 3 */
return 1.0 / rho;
}
case 4:
{
double v_l_sat = 1.0 / rho_l_sat_from_p(p);
double v_g_sat = 1.0 / rho_g_sat_from_p(p);
double h_l_sat = h_l_sat_from_p(p);
double h_g_sat = h_g_sat_from_p(p);
double x = (h - h_l_sat) / (h_g_sat - h_l_sat);
return x * v_g_sat + (1.0 - x) * v_l_sat;
}
case 5:
return R5_specific_volume(p, R5_T_from_p_h_ITER(p, h));
default:
fprintf(stderr, "%s", "Region not recognized!\n");
exit(1);
return 0.0;
}
}
double rho_from_ph(double p, double h)
{
int region = locateRegion_from_ph(p, h);
switch (region) {
case 1:
return 1.0 / R1_specific_volume(p, R1_T_from_p_h(p, h));
case 21:
return 1.0 / R2_specific_volume(p, R2a_T_from_p_h(p, h));
case 22:
return 1.0 / R2_specific_volume(p, R2b_T_from_p_h(p, h));
case 23:
return 1.0 / R2_specific_volume(p, R2c_T_from_p_h(p, h));
case 3:
{
double rho = 0.0, T = 0.0, x = 0.0;
R3_rho_T_x_from_p_h_ITER(p, h, rho, T, x); /* This function covers Region 3 and the subsetion of 4 within 3 */
return rho;
}
case 4:
{
double rho_l_sat = rho_l_sat_from_p(p);
double rho_g_sat = rho_g_sat_from_p(p);
double h_l_sat = h_l_sat_from_p(p);
double h_g_sat = h_g_sat_from_p(p);
double x = (h - h_l_sat) / (h_g_sat - h_l_sat);
return 1.0 / ((1.0 - x) / rho_l_sat + x / rho_g_sat);
}
case 5:
return 1.0 / R5_specific_volume(p, R5_T_from_p_h_ITER(p, h));
default:
fprintf(stderr, "%s", "Region not recognized!\n");
exit(1);
return 0.0;
}
}
double e_from_ph(double p, double h)
{
double v = v_from_ph(p, h);
return h - p * v; // Definition, works for both single-phase and equilibrium two-phase region
}
double T_from_ph(double p, double h)
{
int region = locateRegion_from_ph(p, h);
switch (region) {
case 1:
return R1_T_from_p_h(p, h);
case 21:
return R2a_T_from_p_h(p, h);
case 22:
return R2b_T_from_p_h(p, h);
case 23:
return R2c_T_from_p_h(p, h);
case 3:
{
double rho = 0.0, T = 0.0, x = 0.0;
R3_rho_T_x_from_p_h_ITER(p, h, rho, T, x); /* This function covers Region 3 and the subsetion of 4 within 3 */
return T;
}
case 4:
{
/*
double h_l_sat = h_l_sat_from_p(p);
double h_g_sat = h_g_sat_from_p(p);
double x = (h - h_l_sat) / (h_g_sat - h_l_sat);*/
return T_sat_from_p(p);
}
case 5:
return R5_T_from_p_h_ITER(p, h);
default: