public static CalcResult SlabCalc(int[,] CirArrange, CircuitNumber CircuitInfo, int Nrow, int[] Ntube, int Nelement, string[] fluid, double[] composition, //double Npass, int[] N_tubes_pass, double dh, double l, GeometryResult[,] geo, double[, ,] ta, double te, double pe, double hri, double mr, double ma, double ha, double eta_surface, double zh, double zdp, int hexType, double thickness, double conductivity, double Pwater) { //-------> // R2 R1 // [11 1] <==== // [12 2] <==== // <==== Air // [13 3] <==== // [14 4] <==== // [15 5] <==== // [16 6] <==== // [17 7] <==== // [18 8] <==== // [19 9] <==== // [20 10] <==== // Ncir=1, 11in, 20->10 1out // [19 - 17 - 15 - 13 11 9 7 5 3 1] <====Air // [20 - 18 - 16 - 14 12 10 8 6 4 2] <====Air // Ncir=1, 20in, 20->19 1out // CirArrange = new int[,] { { 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 10, 9, 8, 7, 6, 5, 4, 3, 2, 1 } }; // Nrow=2 // Ncir=2 double wm = Refrigerant.WM(fluid, composition).Wm; double tri = te; //Refrigerant.SATP(fluid, composition, pri, 1).Temperature - 273.15; double pri = pe; int Nciri = CircuitInfo.number[0]; int Nciro = CircuitInfo.number[1]; int Ncir = (Nciri == Nciro ? Nciri : Nciri + Nciro); int N_tube = Ntube[0]; int N_tube_total = 0; CirArr[] cirArr = new CirArr[Nrow * N_tube]; cirArr = CirArrangement.ReadCirArr(CirArrange, CircuitInfo, Nrow, Ntube); CalcResult res_slab = new CalcResult(); double[] pri_cir = new double[Ncir]; //[element, tube, row] double[] hri_cir = new double[Ncir]; double[] tri_cir = new double[Ncir]; double[] mr_ciri = new double[Nciri]; List <double[]> mr_ciri_base = new List <double[]>(); double[] mr_ciro = new double[Nciro]; int[] Ngroupin = new int[Nciro]; int index = 0; int restartDP_index = 0; int N_tube2 = 0; int[] index_cir = new int[Ncir]; CalcResult[] r = new CalcResult[Ncir]; CalcResult[] r1 = new CalcResult[Ncir]; CalcResult[] r2 = new CalcResult[Ncir]; //for NinMout only CalcResult[] res_cir2 = new CalcResult[Nciro + 1]; int flag_ciro = 0; int Ncir_forDP = 0; double[] mr_forDP = new double[Nciri]; int k; double te_calc = 0; CheckDP dPconverge = new CheckDP(); CheckPri priconverge = new CheckPri(); for (int i = 0; i < Nrow; i++) { N_tube_total += Ntube[i]; } for (int i = 0; i < Nciro; i++) { mr_ciro[i] = mr / Nciro; } bool index_outbig; if (CircuitInfo.UnequalCir == null || CircuitInfo.UnequalCir[0] > 0) { index_outbig = false; } else { index_outbig = true; } if (CircuitInfo.UnequalCir != null) { for (int j = 0; j < Nciro; j++) { for (int i = 0; i < Ncir; i++) { if (CircuitInfo.UnequalCir[i] == Nciri + 1 + j) { Ngroupin[j]++; } } //for (int i = 0; i < Nciri; i++) mr_ciri[i] = mr_ciro[j] / Ngroupin[j]; } } int iterforDP = 0; int iterforPri = 0; //Starting properties do { r = new CalcResult[Ncir]; r1 = new CalcResult[Ncir]; res_cir2 = new CalcResult[Nciro + 1]; flag_ciro = (index_outbig ? 1 : 0); tri = Refrigerant.SATP(fluid, composition, pri, 1).Temperature - 273.15; for (int j = 0; j < (flag_ciro == 1 ? (index_outbig ? Nciri + 1 : 1) : Nciro + 1); j++) { if (j >= Nciro) { j = j - Nciro; //for Nciro flag_ciro = (index_outbig ? 0 : 1); } if (j == 1 && index_outbig && index == 0) { j = j - 1; flag_ciro = 0; } index = 0; do { k = 0; if (!index_outbig) { for (int i = 0; i < (flag_ciro == 1 ? Nciro : (Nciri == Nciro ? Ncir : Ncir - Nciro)); i++) { if (flag_ciro == 1) { pri_cir[i + Ncir - Nciro] = res_cir2[i].Pro; hri_cir[i + Ncir - Nciro] = res_cir2[i].hro; tri_cir[i + Ncir - Nciro] = res_cir2[i].Tro; } else { pri_cir[i] = pri; hri_cir[i] = hri; tri_cir[i] = tri; } } } else { for (int i = 0; i < (flag_ciro == 1 ? Nciro : Ncir); i++) { if (flag_ciro == 1) { pri_cir[i] = pri; hri_cir[i] = hri; tri_cir[i] = tri; } else { if (CircuitInfo.UnequalCir[i] == Nciri + 1 + j) { pri_cir[i] = r2[j].Pro; hri_cir[i] = r2[j].hro; tri_cir[i] = r2[j].Tro; } } } } for (int i = 0; i < Ncir; i++) { if (flag_ciro == 1) { if (CircuitInfo.UnequalCir[i] <= 0) { //for (int i = 0; i < Ncir; i++) r[i] = Circuit.CircuitCalc(i, cirArr, CircuitInfo, Nrow, Ntube, Nelement, fluid, composition, dh, l, geo, ta, tri_cir[i], pri_cir[i], hri_cir[i], mr_ciro[k], ma, ha, eta_surface, zh, zdp, hexType, thickness, conductivity, Pwater); r1[k] = r[i].ShallowCopy(); r2[k] = r[i].ShallowCopy(); if (!index_outbig) { r1[k].DP += res_cir2[k].DP; } index_cir[k] = i; k++; Ncir_forDP = Nciro; mr_forDP = (double[])mr_ciro.Clone(); // mr_forDP = mr_ciro if (k == Nciro) { break; } } } else if (Nciri == Nciro || CircuitInfo.UnequalCir[i] == Nciri + 1 + j) { if (index == 0) { if (Nciri == Nciro) { mr_ciro.CopyTo(mr_ciri, 0); } else { if (restartDP_index == 1 || !priconverge.flag) { mr_ciri[k] = mr_ciri_base[j][k] * mr_ciro[j] / (mr / Nciro); } else { mr_ciri[k] = mr_ciro[j] / Ngroupin[j]; } } } //else mr_ciri_base.CopyTo(mr_ciri[k], 0); //for (int i = 0; i < Ncir; i++) r[i] = Circuit.CircuitCalc(i, cirArr, CircuitInfo, Nrow, Ntube, Nelement, fluid, composition, dh, l, geo, ta, tri_cir[i], pri_cir[i], hri_cir[i], mr_ciri[k], ma, ha, eta_surface, zh, zdp, hexType, thickness, conductivity, Pwater); r1[k] = r[i].ShallowCopy(); index_cir[k] = i; k++; if (k == (Nciri == Nciro ? Ncir : Ngroupin[j])) { Ncir_forDP = (Nciri == Nciro ? Ncir : Ngroupin[j]); mr_forDP = (double[])mr_ciri.Clone(); break; } } } if (index_outbig && flag_ciro == 1) { break; } index++; //dPconverge = CheckDPforCircuits.CheckDPConverge(mr, mr_ciri, r, Ncir); dPconverge = CheckDPforCircuits.CheckDPConverge(flag_ciro, mr_forDP, r1, Ncir_forDP); if (flag_ciro == 0) { restartDP_index = 0; if (!dPconverge.flag) { dPconverge.mr.CopyTo(mr_ciri, 0); //mr_ciri = dPconverge.mr; } } else //(flag_ciro == 1) { if (dPconverge.flag) { restartDP_index = 0; } else { restartDP_index = 1; dPconverge.mr.CopyTo(mr_ciro, 0); //mr_ciro = dPconverge.mr; break; } } iterforDP++; N_tube2 = 0; #region //Result print out if (dPconverge.flag) { if (Nciri == Nciro) { te_calc = Refrigerant.SATP(fluid, composition, r[j].Pro, 1).Temperature; } else { if (mr_ciri_base.Count < Nciro) { mr_ciri_base.Add(mr_forDP); //keep original mr ratio for fast iter } j = (flag_ciro == 1 ? j + Nciro : j); res_cir2[j] = new CalcResult(); for (int i = 0; i < (flag_ciro == 1 ? Nciro : Ngroupin[j]); i++) { res_cir2[j].Q += r1[i].Q; res_cir2[j].M += r1[i].M; res_cir2[j].hro += (flag_ciro == 1 ? mr_ciro[i] : mr_ciri[i]) * r1[i].hro; if (fluid[0] == "Water") { res_cir2[j].Tro += (flag_ciro == 1 ? mr_ciro[i] : mr_ciri[i]) * r1[i].Tro; } res_cir2[j].Vel_r = r1[i].Vel_r; res_cir2[j].href += r1[i].href * CircuitInfo.TubeofCir[index_cir[i]]; res_cir2[j].R_1 += r1[i].R_1 * CircuitInfo.TubeofCir[index_cir[i]]; res_cir2[j].R_1a += r1[i].R_1a * CircuitInfo.TubeofCir[index_cir[i]]; res_cir2[j].R_1r += r1[i].R_1r * CircuitInfo.TubeofCir[index_cir[i]]; N_tube2 += CircuitInfo.TubeofCir[index_cir[i]]; } res_cir2[j].DP = r1[(flag_ciro == 1 ? Nciro : Ngroupin[j]) - 1].DP; res_cir2[j].Tao_Detail = ta; res_cir2[j].Pro = r1[(flag_ciro == 1 ? Nciro : Ngroupin[j]) - 1].Pro; res_cir2[j].hro = res_cir2[j].hro / (flag_ciro == 1 ? mr : mr_ciro[j]); res_cir2[j].href = res_cir2[j].href / N_tube2; res_cir2[j].R_1 = res_cir2[j].R_1 / N_tube2; res_cir2[j].R_1a = res_cir2[j].R_1a / N_tube2; res_cir2[j].R_1r = res_cir2[j].R_1r / N_tube2; te_calc = Refrigerant.SATP(fluid, composition, res_cir2[j].Pro, 1).Temperature; if (fluid[0] == "Water") { res_cir2[j].Tro = res_cir2[j].Tro / (flag_ciro == 1 ? mr : mr_ciro[j]); } else { res_cir2[j].Tro = Refrigerant.PHFLSH(fluid, composition, res_cir2[j].Pro, (res_cir2[j].hro + 140) * wm).t - 273.15; } } } #endregion } while (!dPconverge.flag && iterforDP < 100); if (Nciri == Nciro) { break; } if (index_outbig && j == Nciro - 1) { for (int i = 0; i < Nciro; i++) { r2[i].DP += res_cir2[i].DP; } flag_ciro = 1; Ncir_forDP = Nciro; mr_forDP = (double[])mr_ciro.Clone(); // mr_forDP = mr_ciro dPconverge = CheckDPforCircuits.CheckDPConverge(flag_ciro, mr_forDP, r2, Ncir_forDP); if (!dPconverge.flag) { restartDP_index = 1; dPconverge.mr.CopyTo(mr_ciro, 0); //mr_ciro = dPconverge.mr; } break; } } using (StreamWriter wr = File.AppendText(@"D:\Work\Simulation\Test\MinNout.txt")) { for (int i = 0; i < Ncir; i++) { wr.WriteLine("Q, {0}, DP, {1}, href, {2}, Ra_ratio, {3}, Tao, {4}, Tro, {5}, mr, {6}", r[i].Q, r[i].DP, r[i].href, r[i].Ra_ratio, r[i].Tao, r[i].Tro, r[i].mr); } } if (restartDP_index == 1) { priconverge.flag = false; } else if (hexType == 0 && (fluid[0] != "Water")) { priconverge = CheckPin.CheckPriConverge(te, te_calc - 273.15, pri, pe, r[Ncir - 1].Pro); //res_slab.Pro iterforPri++; pri = priconverge.pri; if (priconverge.flag && iterforPri == 1 && iterforDP == 1) { priconverge.flag = false; //to avoid not even iterate but converge by chance } } else { priconverge.flag = true; } } while (!priconverge.flag && iterforPri < 20); if (iterforDP >= 100) { throw new Exception("iter for DPConverge > 100."); } if (iterforPri >= 20) { throw new Exception("iter for DPPri > 20."); } #region //Result print out for (int i = 0; i < Ncir; i++) { res_slab.Q += r[i].Q; res_slab.M += r[i].M; if (Nciri == Nciro) { res_slab.hro += mr_ciri[i] * r[i].hro; } res_slab.href += r[i].href * CircuitInfo.TubeofCir[i]; res_slab.R_1 += r[i].R_1 * CircuitInfo.TubeofCir[i]; res_slab.R_1a += r[i].R_1a * CircuitInfo.TubeofCir[i]; res_slab.R_1r += r[i].R_1r * CircuitInfo.TubeofCir[i]; } if (Nciri == Nciro) { res_slab.hro = res_slab.hro / mr; res_slab.Pro = r[Ncir - 1].Pro; res_slab.Vel_r = r[Ncir - 1].Vel_r; } else if (!index_outbig) { res_slab.hro = res_cir2[Nciro].hro; res_slab.Pro = res_cir2[Nciro].Pro; res_slab.Vel_r = res_cir2[Nciro].Vel_r; } else { res_slab.hro = res_cir2[Nciro - 1].hro; res_slab.Pro = res_cir2[Nciro - 1].Pro; res_slab.Vel_r = res_cir2[Nciro - 1].Vel_r; } res_slab.Pri = pri; res_slab.Tri = tri; res_slab.hri = hri; res_slab.mr = mr; res_slab.DP = pri - res_slab.Pro; res_slab.Tao_Detail = ta; res_slab.href = res_slab.href / N_tube_total; res_slab.ha = ha; res_slab.R_1 = res_slab.R_1 / N_tube_total; res_slab.R_1a = res_slab.R_1a / N_tube_total; res_slab.R_1r = res_slab.R_1r / N_tube_total; te_calc = Refrigerant.SATP(fluid, composition, res_slab.Pro, 1).Temperature; double densityLo = Refrigerant.SATT(fluid, composition, te_calc, 1).DensityL; //mol/L double densityVo = Refrigerant.SATT(fluid, composition, te_calc, 2).DensityV; //mol/L //double wm = Refrigerant.WM(fluid, composition).Wm; double hlo = Refrigerant.ENTHAL(fluid, composition, te_calc, densityLo).Enthalpy / wm - (fluid[0] == "Water" ? 0 : 140); double hvo = Refrigerant.ENTHAL(fluid, composition, te_calc, densityVo).Enthalpy / wm - (fluid[0] == "Water" ? 0 : 140); res_slab.x_o = (res_slab.hro - hlo) / (hvo - hlo); double densityLi = Refrigerant.SATT(fluid, composition, tri + 273.15, 1).DensityL; //mol/L double densityVi = Refrigerant.SATT(fluid, composition, tri + 273.15, 2).DensityV; //mol/L //double wm = Refrigerant.WM(fluid, composition).Wm; double hli = Refrigerant.ENTHAL(fluid, composition, tri + 273.15, densityLi).Enthalpy / wm - (fluid[0] == "Water" ? 0 : 140); double hvi = Refrigerant.ENTHAL(fluid, composition, tri + 273.15, densityVi).Enthalpy / wm - (fluid[0] == "Water" ? 0 : 140); res_slab.x_i = (res_slab.hri - hli) / (hvi - hli); res_slab.Tro = Refrigerant.PHFLSH(fluid, composition, res_slab.Pro, (res_slab.hro + (fluid[0] == "Water" ? 0 : 140)) * wm).t - 273.15; for (int j = 0; j < N_tube; j++) { for (int i = 0; i < Nelement; i++) { res_slab.Tao += res_slab.Tao_Detail[i, j, Nrow]; } } res_slab.Tao = res_slab.Tao / N_tube; res_slab.Ra_ratio = res_slab.R_1a / res_slab.R_1; res_slab.ma = ma; res_slab.Va = ma / 1.2 * 3600; return(res_slab); #endregion }
public static CalcResult ElementCalc(string[] fluid, double[] composition, double dh, double l, double Aa_fin, double Aa_tube, double A_r_cs, double Ar, double tai, double tri, double pri, double hri, double mr, double g, double ma, double ha, double eta_surface, double zh, double zdp, int hexType, double thickness, double conductivity) { double r_metal = thickness / conductivity / Ar; double gg = 9.8; //double temperature; int phase1 = 1; int phase2 = 2; double q_initial = 0.01; double q = q_initial; double err = 0.01; bool flag = false; int iter = 1; CalcResult res = new CalcResult(); //res.Tao[0] = new double(); var r = new Refrigerant.SATTTotalResult(); //temperature = Refrigerant.SATP(fluid, composition, pri, phase1).Temperature; r = Refrigerant.SATTTotal(fluid, composition, tri + 273.15).SATTTotalResult; //temperature res.x_i = (hri - r.EnthalpyL) / (r.EnthalpyV - r.EnthalpyL); //+ 140 for reference state, to be changed RefHTCandDPResult htc_dp = new RefHTCandDPResult(); do { flag = false; htc_dp = RefrigerantHTCandDP.HTCandDP(fluid, composition, dh, g, pri, res.x_i, l, q, zh, zdp); res.href = htc_dp.Href; res.DP = htc_dp.DPref; double cp_a = 1.0; //keep it for now as a constant cp_a = (hexType == 0 ? 1.027 : 1.02); double C_a = ma * cp_a; res.R_1a = 1 / ((eta_surface * Aa_fin + Aa_tube) * ha); res.R_1r = 1 / (res.href * Ar); res.R_1 = res.R_1a + res.R_1r + r_metal; double UA = 1 / res.R_1; double NTU = UA / (C_a * 1000); double epsilon = 1 - Math.Exp(-NTU); res.Q = epsilon * C_a * Math.Abs(tai - tri); res.Tao = tai + Math.Pow(-1, (hexType + 1)) * res.Q / C_a; res.hro = hri + Math.Pow(-1, hexType) * res.Q / mr; //0:evap, 1:cond res.x_o = (res.hro - r.EnthalpyL) / (r.EnthalpyV - r.EnthalpyL); //+ 139.17 for reference state, to be changed //res.DP = 0; res.Pro = pri - res.DP; res.Tro = Refrigerant.PHFLSH(fluid, composition, res.Pro, (res.hro + (fluid[0] == "Water" ? 0 : 140)) * r.Wm).t; // double rho_o = Refrigerant.TQFLSH(fluid, composition, res.Tro, res.x_o).D *r.Wm; // .TPFLSH(fluid, composition, res.Tro, res.Pro).D * r.Wm;//wrong value //double rho_o = Refrigerant.PHFLSH(fluid, composition, res.Pro, (res.hro + 140) * r.Wm).D * r.Wm; //if (res.x_o > 1 || res.x_o < 0) // rho_o = Refrigerant.PHFLSH(fluid, composition, res.Pro, res.hro).D; ////rho_o=density(ref$, P=Pri, T=Tro) //else // rho_o = 0; // //rho_o=density(ref$, P=Pri, x=x_o) res.Tro = res.Tro - 273.15; res.Vel_r = g / rho_o; if (Math.Abs(q - res.Q) / res.Q > err) { q = res.Q; flag = true; } iter++; } while (flag && iter < 100); if (iter >= 100) { throw new Exception("iter for href > 100."); } return(res); }