87 lines
2 KiB
C++
87 lines
2 KiB
C++
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#include "stdio.h"
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#include "math.h"
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#include "WaterPropsIAPWS.h"
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#include <new>
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using namespace std;
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int main () {
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double dens, u, s, h, cv, cp, pres;
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WaterPropsIAPWS *water = new WaterPropsIAPWS();
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double T;
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/*
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* Print out the triple point conditions
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*/
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T = 273.16;
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pres = water->psat(T);
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printf("psat(%g) = %g\n", T, pres);
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dens = water->density(T, pres, WATER_LIQUID);
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printf("dens (liquid) = %g kg m-3\n", dens);
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u = water->intEnergy();
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if (fabs(u) < 5.0E-7) {
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printf("intEng (liquid) = ~0.0 J/kmol (fabs(u) < 5.0E-7)\n");
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} else {
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printf("intEng (liquid) = %g J/kmol\n", u);
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}
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s = water->entropy();
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if (fabs(s) < 5.0E-9) {
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printf("S (liquid) = ~0.0 J/kmolK (fabs(s) < 5.0E-9)\n");
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} else {
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printf("S (liquid) = %g J/kmolK\n", s);
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}
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h = water->enthalpy();
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printf("h (liquid) = %g J/kmol\n", h);
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printf("h (liquid) = %g J/kg\n", (h)/18.015268);
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double g_liq = water->Gibbs(T, dens);
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printf("g (liquid) = %g J/kmol\n", g_liq);
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cv = water->cv(T, dens);
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printf("cv (liquid) = %g J/kmolK\n", cv);
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cp = water->cp(T, dens);
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printf("cp (liquid) = %g J/kmolK\n", cp);
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dens = water->density(T, pres, WATER_GAS);
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printf("dens (gas) = %g kg m-3\n", dens);
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u = water->intEnergy();
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printf("intEng (gas) = %g J/kmol\n", u);
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s = water->entropy();
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printf("S (gas) = %g J/kmolK\n", s);
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h = water->enthalpy();
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printf("h (gas) = %g J/kmol\n", h);
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printf("h (gas) = %g J/kg\n", (h)/18.015268);
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double g_gas = water->Gibbs(T, dens);
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printf("g (gas) = %g J/kmol\n", g_gas);
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cv = water->cv(T, dens);
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printf("cv (gas) = %g J/kmolK\n", cv);
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cp = water->cp(T, dens);
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printf("cp (gas) = %g J/kmolK\n", cp);
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printf("\n");
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double deltaG = g_liq - g_gas;
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if (fabs(deltaG) < 1.0E-5) {
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printf("Delta g = ~0.0 J/kmol ( < 1.0E-5)\n");
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} else {
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printf("Delta g = %g J/kmol\n", g_liq - g_gas);
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}
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delete water;
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return 0;
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}
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