using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Web;
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namespace IStation.Calculation.Epanet
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{
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/// <summary>
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/// 计算辅助类
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/// </summary>
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public class CalcuHelper
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{
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public static double g = 9.81;
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/// <summary>
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/// 转速比 转 赫兹
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/// </summary>
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public static decimal N2HZ(decimal N)
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{
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return N * 50;
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}
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/// <summary>
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/// 米 转 兆帕
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/// </summary>
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public static double M2MPa(double h)
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{
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return h * g / 1000;
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}
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/// <summary>
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/// M=>KPa
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/// </summary>
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/// <param name="m"></param>
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/// <returns></returns>
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public static double M2KPa(double m)
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{
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return m * 10;
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}
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/// <summary>
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/// 计算效率(效率用百分数 小于等于100):Q用m^3/h H为m ,P为kw,density密度为kg/m^3,gavity用重力加速度m/s^2
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/// </summary>
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public static double CalculateE(double Q, double H, double P, double midu= 1000.0, double gavity = 9.81)
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{
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P *= 1000.0;
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Q /= 3600.0;
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double num = 0.0;
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num = ((!(P < 0.1)) ? (midu * gavity * Q * H / P) : 0.0);
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return Math.Round(num * 100.0, 2);
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}
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/// <summary>
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/// 科学记数法转换成正常数值
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/// </summary>
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public static decimal ConventE(double value)
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{
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decimal change = 0;
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var strValue = value.ToString();
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if (strValue.ToString().Contains("E"))
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change = Convert.ToDecimal(Decimal.Parse(strValue.ToString(), System.Globalization.NumberStyles.Float));
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else
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change = Convert.ToDecimal(value);
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if (change > 10)
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change = Math.Round(change, 1);
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else
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change = Math.Round(change, 4);
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return change;
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}
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}
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}
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