Changeset 449 for branches/packed/eml/stage_separators

Timestamp:

Jan 28, 2008, 2:46:08 PM (15 years ago)

Author:

Paula Bettio Staudt

Message:

More packed-stage equations

File:

• branches/packed/eml/stage_separators/tray.mso (modified) (4 diffs)

branches/packed/eml/stage_separators/tray.mso

@@ -169 +169 @@
 end
 
-Model packedStage as trayBasic
+Model packedStageOld as trayBasic
         PARAMETERS
         PPwater as Plugin(Brief="Physical Properties",
@@ -204 +204 @@
         rhoV as dens_mass (Brief="Vapor density");
         viscL as viscosity (Brief="Liquid Viscosity");
-#       viscV as viscosity (Brief="Vapor Viscosity");
+        viscV as viscosity (Brief="Vapor Viscosity");
         rhow as dens_mass (Brief="Water density");
         visclw as viscosity (Brief="Water viscosity");
@@ -242 +242 @@
         "Liquid Viscosity"
         viscL = PP.LiquidViscosity(OutletL.T, OutletL.P, OutletL.z);
-#       "Vapor Viscosity"
-#       viscV = PP.VapourViscosity(OutletV.T, OutletV.P, OutletV.z);
+        "Vapor Viscosity"
+        viscV = PP.VapourViscosity(OutletV.T, OutletV.P, OutletV.z);
         "Liquid Density"
         rhoL = PP.LiquidDensity(OutletL.T, OutletL.P, OutletL.z);
@@ -431 +431 @@
         V = ML* vL + MV*vV;
 end
+
+
+FlowSheet test
+        PARAMETERS
+        a as Real (Brief="surface area per packing volume", Unit='m^2/m^3');
+#       N as Real (Brief="Number of elements per volume",Unit='1/m^3');
+        niL as Real (Brief="Liquid dynamic viscosity", Unit='kg/m/s');
+        niV as Real (Brief="Vapor dynamic viscosity", Unit='kg/m/s');
+        g as acceleration;
+        rhoL as dens_mass;
+        rhoV as dens_mass;
+        e as Real (Brief="Void fraction of packing, m^3/m^3");
+        V as volume;
+        Across as area;
+        ds as length (Brief="Column diameter");
+        d as length (Brief="size of an element of packing");
+        h as length (Brief="Height of packing");
+        C as Real (Brief="Constant for resitance factor equation");
+        Cp as Real (Brief="Constant for resitance at loading point factor equation");
+        
+        vL as volume_mol;
+        vV as volume_mol;
+        ML as mol;
+        Mw as molweight;
+        dP as pressure (DisplayUnit='atm');
+        
+        VARIABLES
+        hL as Real (Brief="Liquid holdup", Default = 0.424);
+        VL as volume (Brief="Liquid volume", Default = 0.025);
+        uL as velocity (Brief="volume flow rate of liquid, m^3/m^2/s", Default = 0.007);
+        uV as velocity (Brief="volume flow rate of vapor, m^3/m^2/s", Default = 1.14);
+#       n as Real;
+        FV as flow_mol(Default = 149);
+        FL as flow_mol(Default = 222);
+        ksi as Real (Brief="Coefficient of Resistance", Default = 0.784);
+        ksil as Real (Brief="Coefficient of Resistance", Default = 0.032);
+        Rev as Real(Default = 0.966);
+        hLs as Real(Default = 0.037);
+        
+        EQUATIONS
+        VL = vL * ML;
+        hL = VL/V;
+        uL * Across = FL * vL;
+        uV * Across = FV * vV;
+        
+        ksi * C^2 * (uL/uV * sqrt(rhoV/rhoL) * (niL/niV)^5.8)^3 = g/1*'s^2/m';
+        
+        a^2 * niL * uL = hL^1 *(g*rhoL/3 - ksi*a*rhoV*uV^2/(4*hL*(e-hL)^2));
+        
+        dP/h = ksil *(a/2 + 2/ds)*(uV^2*rhoV/(e-hL)^3);
+        
+        ksil = Cp * (exp(uL*rhoL/a/niL/200)*(hL/hLs)^0.3) * (64/Rev+(1.8/Rev)) *
+                                ((e-hL)/e);#1.5
+        
+        Rev = uV * (d-2*hL/a) * rhoV/ niV;
+        
+        hLs = (12*a^2*niL*uL/g/rhoL)^0.333;
+
+        SPECIFY
+#       FV = 147.1 * 'kmol/h';
+#       FL = 229.5 * 'kmol/h';
+#       ksi = 0.809623;
+        
+        SET
+        Mw = 75 * 'g/mol';
+        vL = 9.5e-5 * 'm^3/mol';
+        vV = 0.022 * 'm^3/mol';
+        niL = 0.00032 * 'kg/m/s';
+        niV = 8.2e-5 * 'kg/m/s';
+        rhoL = 809 * 'kg/m^3';
+        rhoV  = 4.63 * 'kg/m^3';
+        ML = 0.268 * 'kmol';
+        dP = 0.1984 * 0.001 * 'atm';#0.1984 * 'atm';
+        
+        V = 0.06 * 'm^3';#0.06 * 'm^3';
+        Across = 0.8 * 'm^2';
+        h = 0.075 * 'm';
+        ds = 1.009 * 'm';
+        d = 50 * 'mm';
+
+#       ksi = 0.8;
+        C = 2.37;
+        Cp = 0.662;
+        e = 0.78;
+        a = 120 * 'm^2/m^3';
+#       N = 6400 * '1/m^3';
+
+        OPTIONS
+        GuessFile = "/home/paula/test.rlt";
+        
+end
+
+