136 lines
4.9 KiB
C#
136 lines
4.9 KiB
C#
using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace CapMachine.Wpf.PPCalculation
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{
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/// <summary>
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/// 干燥度计算帮助类
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/// </summary>
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public static class DrynessCALCHelper
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{
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public static void GetValue()
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{
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//var dd= DrynessREFPROP.GetDryness(67,0.3);
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// 获取输入参数
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double P_suction = 0.3; // 吸气压力 (bar)
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double mg = 50 / 3600; // 气体制冷剂流量 (kg/h → kg/s)
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double ml = 4.5 / 3600; // 液体制冷剂流量 (kg/h → kg/s)
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double T_gas_valve = 35; // 气体回路阀前温度 (°C)
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double P_gas_valve = 15; // 气体回路阀前压力 (bar)
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double T_liq_valve = 67; // 液体制冷剂阀前温度 (°C)
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double P_liq_valve = 14.5; // 液体制冷剂阀前压力 (bar)
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double x_target = 14.5; // 目标干度
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// 获取焓值
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double h_gas = GetEnthalpy(P_gas_valve, T_gas_valve + 273.15); // 转换为 K
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double h_liq = GetEnthalpy(P_liq_valve, T_liq_valve + 273.15); // 转换为 K
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// 计算实际干度
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double x_actual = CalculateActualDryness(mg, ml, h_gas, h_liq, P_suction);
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// 计算目标液体流量
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double ml_target = CalculateTargetLiquidFlow(mg, h_gas, h_liq, P_suction, x_target);
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//lblTargetLiquidFlow.Text = $"目标液体流量: {ml_target * 3600:F2} kg/h"; // 转换为 kg/h
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}
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/// <summary>
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/// 使用REFPROP64 获取饱和参数
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/// </summary>
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/// <param name="P"></param>
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/// <param name="Tsat"></param>
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/// <param name="h_f"></param>
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/// <param name="h_g"></param>
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/// <exception cref="Exception"></exception>
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private static void GetSaturationProperties(double P, out double Tsat, out double h_f, out double h_g)
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{
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StringBuilder herr = new StringBuilder(255);
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double Dl, Dv, hl, hv, sl, sv;
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int ierr;
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// 调用 REFPROP 的 SATPdll 函数获取饱和参数
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DrynessREFPROP.SATPdll(P, 0, "P", "H", out Tsat, out Dl, out Dv, out hl, out hv, out sl, out sv, out ierr, herr, 1, 1);
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if (ierr != 0)
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throw new Exception($"饱和状态计算失败: {herr.ToString()}");
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h_f = hl; // 饱和液体焓 (J/kg)
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h_g = hv; // 饱和气体焓 (J/kg)
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}
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/// <summary>
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/// 计算实际干度
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/// </summary>
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/// <param name="mg"></param>
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/// <param name="ml"></param>
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/// <param name="h_gas"></param>
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/// <param name="h_liq"></param>
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/// <param name="P_suction"></param>
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/// <returns></returns>
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public static double CalculateActualDryness(double mg, double ml, double h_gas, double h_liq, double P_suction)
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{
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// 获取吸气压力下的饱和参数
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double Tsat, h_f, h_g_sat;
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GetSaturationProperties(P_suction, out Tsat, out h_f, out h_g_sat);
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// 计算混合焓
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double h_total = (mg * h_gas + ml * h_liq) / (mg + ml);
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// 计算干度
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return (h_total - h_f) / (h_g_sat - h_f);
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}
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/// <summary>
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/// 计算目标液体流量
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/// </summary>
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/// <param name="mg"></param>
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/// <param name="h_gas"></param>
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/// <param name="h_liq"></param>
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/// <param name="P_suction"></param>
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/// <param name="x_target"></param>
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/// <returns></returns>
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public static double CalculateTargetLiquidFlow(double mg, double h_gas, double h_liq, double P_suction, double x_target)
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{
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// 获取吸气压力下的饱和参数
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double Tsat, h_f, h_g_sat;
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GetSaturationProperties(P_suction, out Tsat, out h_f, out h_g_sat);
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// 计算目标焓
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double h_target = h_f + x_target * (h_g_sat - h_f);
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// 解方程求目标液体流量
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return mg * (h_gas - h_target) / (h_target - h_liq);
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}
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/// <summary>
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/// 获取焓值
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/// </summary>
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/// <param name="P"></param>
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/// <param name="T"></param>
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/// <returns></returns>
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/// <exception cref="Exception"></exception>
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public static double GetEnthalpy(double P, double T)
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{
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StringBuilder herr = new StringBuilder(255);
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double D, Dl, Dv, h, s, u, cv;
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int ierr;
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// 调用 REFPROP 的 TPFLSHdll 函数获取焓值
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DrynessREFPROP.TPFLSHdll(T, P, "T", "P", out D, out Dl, out Dv, out h, out s, out u, out cv, out ierr, herr, 1, 1);
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if (ierr != 0)
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throw new Exception($"焓值计算失败: {herr.ToString()}");
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return h; // 返回焓值 (J/kg)
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}
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}
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}
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