//For smooth tube for now;
public static double deltap_smooth(string[] fluid, double[] composition, double d, double g, double p, double x, double l)
{
double Co = 0.01;
double f_oil = 0;
if (x == 1)
{
f_oil = 1.0;
}
else
{
f_oil = 1.15;
}
double m_to_ft = 1000 / (12 * 25.4);
double dp = 0.0;
int phase1 = 1;
int phase2 = 2;
var r = new Refrigerant.SATTTotalResult();
double tsat = Refrigerant.SATP(fluid, composition, p, phase1).Temperature;
r = Refrigerant.SATTTotal(fluid, composition, tsat).SATTTotalResult;
double Re_l = g * d / r.ViscosityL;
double Re_v = g * d / r.ViscosityV;
double f_l = RefrigerantSPDP.ff_Friction(Re_l);
double f_v = RefrigerantSPDP.ff_Friction(Re_v);
double DP_l = f_l * Math.Pow(g, 2.0) / (2 * r.DensityL * d);
double DP_tp = 0;
if (x <= 0.8)
{
double f_tp = 0.007397899 / (Math.Pow(x, 0.8) * Math.Pow(d * m_to_ft, 0.5)); //"Sacks & Geary"
DP_tp = f_tp * f_oil * Math.Pow(x * g, 2.0) / (2 * r.DensityV * d);
dp = Math.Max(DP_l, DP_tp) * l;
dp = dp * 0.001;
}
else
{
double x_point8 = 0.8;
double f_tp_x_point8 = 0.007397899 / (Math.Pow(x_point8, 0.8) * Math.Pow(d * m_to_ft, 0.5)); //0.00566
double DP_tp_point8 = f_tp_x_point8 * f_oil * Math.Pow(x_point8 * g, 2.0) / (2 * r.DensityV * d);
double x_1 = 1.0;
double f_tp_x_1 = f_v * (1 + 14.73 * Math.Pow(Co, 0.591958)) / Math.Pow(m_to_ft, 0.5);
double DP_tp_1 = f_tp_x_1 * f_oil * Math.Pow(x_1 * g, 2.0) / (2 * r.DensityV * d);
DP_tp = (DP_tp_point8 + (x - 0.8) / (1.0 - 0.8) * (DP_tp_1 - DP_tp_point8)) * l;
dp = DP_tp * 0.001;
}
return(dp);
}
public static double Shah_Evap_href(string[] fluid, double[] composition, double d, double g, double p, double x, double q, double l)
{
var r = new Refrigerant.SATTTotalResult();
double temperature;
int phase1 = 1;
int phase2 = 2;
temperature = Refrigerant.SATP(fluid, composition, p, phase1).Temperature;
r = Refrigerant.SATTTotal(fluid, composition, temperature).SATTTotalResult;
double Pr_l = r.CpL * r.ViscosityL / r.KL * 1000;
double h_fg = r.EnthalpyV - r.EnthalpyL; //"KJ"
double qflux = q / (l * 3.14159 * d);
double Bo = qflux / (g * h_fg);
double Co = Math.Pow(1 / x - 1, 0.8) * Math.Pow(r.DensityV / r.DensityL, 0.5);
double Fr_l = Math.Pow(g, 2.0) / (Math.Pow(r.DensityL, 2.0) * 9.8 * d);
double h_LO = 0.023 * Math.Pow(g * (1 - x) * d / r.ViscosityL, 0.8) * Math.Pow(Pr_l, 0.4) * (r.KL / d);
double h_LT = 0.023 * Math.Pow(g * (1 - 0) * d / r.ViscosityL, 0.8) * Math.Pow(Pr_l, 0.4) * (r.KL / d);
int N = 0;
double f = 0.0;
if (Fr_l > 0.04)
{
N = 0;
}
else
{
N = 1;
}
if (Bo > 0.0011)
{
f = 14.7;
}
else
{
f = 15.43;
}
double h1 = 230 * Math.Pow(Bo, 0.5) * h_LO;
double h2 = 1.8 * Math.Pow(Co * Math.Pow(0.38 * Math.Pow(Fr_l, -0.3), N), -0.8) * h_LO;
double h3 = f * Math.Pow(Bo, 0.5) * Math.Exp(2.47 * Math.Pow(Co * Math.Pow(0.38 * Math.Pow(Fr_l, -0.3), N), -0.15)) * h_LO;
double h4 = f * Math.Pow(Bo, 0.5) * Math.Exp(2.74 * Math.Pow(Co * Math.Pow(0.38 * Math.Pow(Fr_l, -0.3), N), -0.1)) * h_LO;
double h5 = h_LT;
double href = Math.Max(Math.Max(Math.Max(Math.Max(h1, h2), h3), h4), h5);
return(href);
}