180 lines
5.1 KiB
C++
Executable file
180 lines
5.1 KiB
C++
Executable file
// HFC134a
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#include "HFC134a.h"
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#include <math.h>
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namespace tpx {
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const double
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M = 102.032,
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Tmn = 170.0,
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Tmx = 455.0,
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Tc = 374.18,
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Pc = 4056290.0,
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Roc = 508.0,
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R = 81.48885644;
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const double a134[] = {
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0.5586817e-1,
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0.4982230,
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0.2458698e-1,
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0.8570145e-3,
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0.4788584e-3,
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-0.1800808e1,
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0.2671641,
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-0.4781652e-1,
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0.1423987e-1,
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0.3324062,
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-0.7485907e-2,
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0.1017263e-3,
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-0.5184567,
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-0.8692288e-1,
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0.2057144,
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-0.5000457e-2,
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0.4603262e-3,
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-0.3497836e-2,
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0.6995038e-2,
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-0.1452184e-1,
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-0.1285458e-3
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};
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const double t134[] = {
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-0.5, 0.0, 0.0, 0.0, 1.5, 1.5, 2.0, 2.0, 1.0, 3.0, 5.0,
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1.0, 5.0, 5.0, 6.0, 10.0, 10.0, 10.0, 18.0, 22.0, 50.0
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};
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const int d134[] = {
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2, 1, 3, 6, 6, 1, 1, 2, 5, 2, 2,
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4, 1, 4, 1, 2, 4, 1, 5, 3, 10
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};
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const double b134[] = {
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-1.019535,
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9.047135,
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-1.629789,
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-9.723916,
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-3.927170
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};
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double HFC134a::fp() {
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double sum1 = 0.0, sum2 = 0.0, sum3 = 0.0,
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sum4 = 0.0, sum5 = 0.0;
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double tau = Tc/T;
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double delta = Rho/Roc;
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double phi0 = b134[0] + b134[1]*tau + b134[2]*log(tau)
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+ log(delta) + b134[3]/sqrt(tau) + b134[4]*pow(tau,-0.75);
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int i;
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for (i = 0; i<8; i++)
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sum1 += a134[i]*pow(tau,t134[i])*pow(delta,d134[i]);
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for (i = 8; i<11; i++)
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sum2 += a134[i]*pow(tau,t134[i])*pow(delta,d134[i]);
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for (i = 11; i<17; i++)
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sum3 += a134[i]*pow(tau,t134[i])*pow(delta,d134[i]);
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for (i = 17; i<20; i++)
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sum4 += a134[i]*pow(tau,t134[i])*pow(delta,d134[i]);
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sum5 = a134[20]*pow(tau,t134[20])*pow(delta,d134[20]);
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double phir = sum1 + exp(-delta)*sum2 + exp(-delta*delta)*sum3
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+ exp(-delta*delta*delta)*sum4
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+ exp(-delta*delta*delta*delta)*sum5;
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return R*T*(phir + phi0);
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}
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double HFC134a::up() {
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double sum1 = 0.0, sum2 = 0.0, sum3 = 0.0,
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sum4 = 0.0, sum5 = 0.0;
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double tau = Tc/T;
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double delta = Rho/Roc;
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double phi0t = b134[1]*tau + b134[2]
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- 0.5*b134[3]*pow(tau,-0.5) - 0.75*b134[4]*pow(tau,-0.75);
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int i;
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for (i = 0; i<8; i++)
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sum1 += a134[i]*t134[i]*pow(tau,t134[i])*pow(delta,d134[i]);
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for (i = 8; i<11; i++)
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sum2 += a134[i]*t134[i]*pow(tau,t134[i])*pow(delta,d134[i]);
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for (i = 11; i<17; i++)
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sum3 += a134[i]*t134[i]*pow(tau,t134[i])*pow(delta,d134[i]);
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for (i = 17; i<20; i++)
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sum4 += a134[i]*t134[i]*pow(tau,t134[i])*pow(delta,d134[i]);
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sum5 = a134[20]*t134[20]*pow(tau,t134[20])*pow(delta,d134[20]);
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double phirt = sum1 + exp(-delta)*sum2 + exp(-delta*delta)*sum3
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+ exp(-delta*delta*delta)*sum4
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+ exp(-delta*delta*delta*delta)*sum5;
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return R*T*(phirt + phi0t) + m_energy_offset;
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}
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double HFC134a::Pp(){
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double sum1 = 0.0, sum2 = 0.0, sum3 = 0.0,
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sum4 = 0.0, sum5 = 0.0;
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double tau = Tc/T;
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double delta = Rho/Roc;
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double phi0d = 1.0/delta;
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int i;
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for (i = 0; i<8; i++)
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sum1 += a134[i]*pow(tau,t134[i])*d134[i]*pow(delta,d134[i]-1);
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for (i = 8; i<11; i++)
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sum2 += a134[i]*pow(tau,t134[i])*(d134[i] - delta)*pow(delta,d134[i]-1);
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sum2 *= exp(-delta);
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double dk = delta*delta;
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for (i = 11; i<17; i++)
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sum3 += a134[i]*pow(tau,t134[i])*(d134[i] - 2.0*dk)*pow(delta,d134[i]-1);
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sum3 *= exp(-dk);
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dk *= delta;
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for (i = 17; i<20; i++)
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sum4 += a134[i]*pow(tau,t134[i])*(d134[i] - 3.0*dk)*pow(delta,d134[i]-1);
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sum4 *= exp(-dk);
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dk *= delta;
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sum5 = a134[20]*pow(tau,t134[20])*(d134[20] - 4.0*dk)*pow(delta,d134[20]-1);
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sum5 *= exp(-dk);
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double phird = sum1 + sum2 + sum3 + sum4 + sum5;
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return R*T*delta*delta*Roc*(phird + phi0d);
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}
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double HFC134a::Psat(){
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if ((T < Tmn) || (T > Tc)) set_Err(TempError);
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double x1 = T/Tc;
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double x2 = 1.0 - x1;
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double f = -7.686556*x2 + 2.311791*pow(x2,1.5)
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- 2.039554*x2*x2 - 3.583758*pow(x2,4);
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return Pc*exp(f/x1);
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}
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/*
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double HFC134a::dPsatdT(){
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if ((T < Tmn) || (T > Tc)) set_Err(TempError);
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double x1 = T/Tc;
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double x2 = 1.0 - x1;
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double f = -7.686556*x2 + 2.311791*pow(x2,1.5)
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- 2.039554*x2*x2 - 3.583758*pow(x2,4);
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double fp = -7.686556 + 1.5*2.311791*pow(x2,0.5)
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- 2.0*2.039554*x2 - 4.0*3.583758*pow(x2,3);
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return -Pc*exp(f/x1)*(fp/T + f/(x1*T));
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}
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*/
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double HFC134a::ldens(){
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if ((T < Tmn) || (T > Tc)) set_Err(TempError);
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double x1 = T/Tc;
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double x2 = 1.0 - x1;
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return 518.2 + 884.13*pow(x2,1.0/3.0) + 485.84*pow(x2,2.0/3.0)
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+ 193.29*pow(x2,10.0/3.0);
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}
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double HFC134a::Tcrit() {return 374.21;}
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double HFC134a::Pcrit() {return 4059280.0;}
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double HFC134a::Vcrit() {return 1.0/511.95;}
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double HFC134a::Tmin() {return Tmn;}
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double HFC134a::Tmax() {return Tmx;}
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char * HFC134a::name() {
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return (char *) m_name.c_str();
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}
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char * HFC134a::formula() {
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return (char *) m_formula.c_str();
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}
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double HFC134a::MolWt() {return M;}
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}
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