Mixture DataTowler CH11LFeedFeed 2Combined FeedTop DBottomData ziKnow LFeedFeed 2F1+F2Top DBottomT14038140.253143.8405F19.0089131.780455130.370110.114101P6444W1776.33132.516891809463.53841776.337F19.0089131.780455130.370110.114101kmol/h0.027AC15.245370.0274331150.091476315.24068W1776.33132.516891809463.53841776.337kmol/h0.965Total flow18116418754941805AC15.245370.0274331150.091476315.24068kmol/h0.008Total flow18116418754941792kmol/h1.000ProcessConc DataT144
Windows User: Windows User:between bp and dpCF16kt/y96.1kg/kmolyi (mol frac top)xi (mol frac bot)yi (mol frac top)xi (mol frac bot)P4barW281kt/y18.0kg/kmolF 6.15E-026.37E-050.0120.00024AC80.3kt/y60.1kg/kmolW0.940.990.9870.96300Total377.3kt/yAC0.00
Windows User: Windows User:Assume very small0.010.001
Windows User: Windows User:Assume very small0.0367603604kmol /h494179214010221.82707723473072.17836189FeedFlash CalcL/V3.9From distil3.9FlowKi
Nur Zulifle: Nur Zulifle:EquilibriumziKizizi/KiTc CAi=L/VkiVi=Fzi/(1+Ai)yi=Vi/Vxi=(Fzi-Vi)/LF61kmol/h965.3688449280.027260.0003970.004039906661.230.1250.000W2189kmol/h0.94644791750.9650.9131.0193744.12067048584280.8750.990AC18kmol/h0.02176910680.0080.0000.374321.61790.100.0000.010Total2269kmol/h1.00271.4V calc489Check>1.0>1.0L/V3.64% diff-7.09L1780H VapFlowxihghfhfgxi(hfg)F61kmol/h0.0001389254xxERROR:#VALUE!ERROR:#VALUE!hfg42.8kJ/mol42.845.341432kg/kmolW2189kmol/h0.9895360792xxERROR:#VALUE!ERROR:#VALUE!2153kJ/kg38786.89784kJ/molMr18.01528kg/kmolAC18kmol/h0.0103249954xxERROR:#VALUE!ERROR:#VALUE!405kJ/kg24320Mr60.05kg/kmolTotal2269kmol/hERROR:#VALUE!37620

Vap rateHf1-67755.2cal/mol67755.2Fraction evap=(Hf-Hl/(Hv-HL)Hf2-67548.967548.9Hl-66330.466330.4Hv-6439264392Fraction vapourised-35.5828002476-35.5828002476MrL18.4601348522kg/moldensity967viscosity1.85E-04From condenserV 27.8019479133kg/mol2.260.00001379ViscosityFraction vapourised1.49mPa.sW

CalcsDesign InputProcess StreamUtility StreamFlow bottoms (kt/y)DescriptionReboiler feed
Nur Zulifle: Nur Zulifle:Assumed same as bottoms stream 121Vapour returnLiquid returnHeat sourceT289Temp144P (barg)4barg10bargW2810.9723183391P (barg)4Rates36000kg/h489kmol/h494kmol/hAC8.030.0277854671315kt/y284kt/y32kt/yPhysical PropertiesF 0.002890.00001Reboiler feedVapour returnLiquid returnHeat source293Boiling point142.5C144--Average, from DISTILMr18.4kg/kmol Average, from DISTIL--Gas constant RTc321.6
Nur Zulifle: Nur Zulifle:Take lowest?C--Vapourisation rate489kmol/hLatent heat37620
Nur Zulifle: Nur Zulifle:take the mixture. Change unitskJ/mol--Aspen duty16,604,000WSaturation temp------180
Nur Zulifle: Nur Zulifle:144!!CNew vapourisation rate283.824kt/yMean overall T, areaNew vapourisation rate9kg/sMean overall T37.5CNew Liq rate1kg/sReduced temp0.56New Liq rate31.536kt/yDesign heat flux, Fig 12.61 Towler35000W/m2Heat load (duty)20,463,398W20,463,398Area required585m2Tube ID tube0.05m50mmgeneralthickness0.0022mmcorrosion allowance0.00050.5mmOD tube0.0525mmmID+thickness+corrosion 0.5 mmL tube3.66
Nur Zulifle: Nur Zulifle:mgeneral size, from 1.83m for vacuum service to 3.66m for pressure operation.Area 1 tube0.575m2Number of tubes1,017-Pitch typeSquarePitch 1.25Pass1n1 2.207re: Tube layout sheetK1 0.215re: Tube layout sheetD bundle (sq)2.428mShell Type of tube sheetFixed tube sheet, bcs vertical thermosiphonCHECKre: Fig 12.10Clearance, Fig 12.100.019mID shell2.447mOutlet pipeTotal tube CSA1.997m2D outlet pipe1.59mPhasesLiquid density at base of HEX967kg/m3Relative Mr at tube entry18.5kg/molRelative Mr vapor at exit27.8kg/molAverage23.1Volume VaporERROR:#VALUE!xxVolume liquid2.62m3/s666Total volumeERROR:#VALUE!Exit densityERROR:#VALUE!kg/m3Friction LossMass flow rate74650kg/sCSA tube0.0020m2Total CSA bundle1.9968Mass flux37384kg/m2/s

Viscosity, taken as L1.85E-042.00E-04Static Pressure in TubesAvailable Head

Heat Transferconvective boiling coefficient Chen'smethodCritical pressure F55.02barCritical pressure W220.6bar22060000Critical pressure55.02bar5502000PaThis is for FU onlyNucleate boiling coefficientMostinski eqnq for mostinskih_nb3319.1W/m2.CVapor quality (mass vap/total), x0.2Viscosity vapor1.38E-05Pa.s0.000011.34E-05From Condenser dataDensity vapor at tube exit2.26kg/m31/Xtt4.99k, L0.688W/mKCp, L4200J/kgKPr L1.24water, fluid1.121.13E+00From condenserMass flow, L only in tubes1.00kg/sMass flux, L only in tubes1kg/m2/sVelocity0.0005m/sRe_L135-can use Gde re condensationj_h0.0043.5re: Fig 12.23Nu 1Viscosity correction factor1Neglecth_i1.9check formulaf_c convective boiling factor8re:Fig12.581,680f_s nucleate suppression boiling factor0.50re:Fig12.59h_cb at outlet conditions1,674W/m2/C

Re_L at inlet272j_h0.0032.5re:Fig12.23Nu1check formulah_i3check formulaMean coefficient838W/m2/COverall USteam coefficient8000W/m2/Cho IGNORE2923W/m2KFrom condenser2923hof8000W/m2Kwater coldhi 838W/m2Khif IGNORE5000W/m2KprocessMaterial, kw IGNORE21.4W/m2K1/U0.00140.0019896657Calculated U726W/m2/Cq3WdTlm37.5CRequired U933W/m2.C -25%limit-3030CheckTRUETRUE

Calcs 2 UnitsDesign InputProcess StreamUtility StreamFlow bottoms (kt/y)DescriptionReboiler feed
Nur Zulifle: Nur Zulifle:Assumed same as bottoms stream 121Vapour returnLiquid returnHeat sourceT289Temp144P (barg)4barg10bargW2810.9723183391P (barg)4Rates18000kg/h489kmol/h494kmol/hAC8.030.0277854671158kt/y142kt/y16kt/yPhysical PropertiesF 0.002890.00001Reboiler feedVapour returnLiquid returnHeat source293Boiling point142.5C144--Average, from DISTILMr18.4kg/kmol Average, from DISTIL--Gas constant RTc321.6
Nur Zulifle: Nur Zulifle:Take lowest?C--Vapourisation rate489kmol/hLatent heat37620
Nur Zulifle: Nur Zulifle:take the mixture. Change unitskJ/mol--Aspen duty16,604,000WSaturation temp------180
Nur Zulifle: Nur Zulifle:144!!CNew vapourisation rate283.824kt/yMean overall T, areaNew vapourisation rate9kg/sMean overall T37.5CNew Liq rate1kg/sReduced temp0.56New Liq rate31.536kt/yDesign heat flux, Fig 12.61 Towler35000W/m2Heat load (duty)10,231,699W10,231,699Area required292m2Tube ID tube0.05m50mmgeneralthickness0.0022mmcorrosion allowance0.00050.5mmOD tube0.0525mmmID+thickness+corrosion 0.5 mmL tube3.66
Nur Zulifle: Nur Zulifle:mgeneral size, from 1.83m for vacuum service to 3.66m for pressure operation.Area 1 tube0.575m2Number of tubes508-Pitch typeSquarePitch 1.25Pass1n1 2.207re: Tube layout sheetK1 0.215re: Tube layout sheetD bundle (sq)1.774mShell Type of tube sheetFixed tube sheet, bcs vertical thermosiphonCHECKre: Fig 12.10Clearance, Fig 12.100.019mID shell1.793mOutlet pipeTotal tube CSA0.998m2D outlet pipe1.13mPhasesLiquid density at base of HEX967kg/m3Relative Mr at tube entry18.5kg/molRelative Mr vapor at exit27.8kg/molAverage23.1Volume VaporERROR:#VALUE!xxVolume liquid2.62m3/s666Total volumeERROR:#VALUE!Exit densityERROR:#VALUE!kg/m3Friction LossMass flow rate37325kg/sCSA tube0.0020m2Total CSA bundle0.9984Mass flux37384kg/m2/s

Viscosity, taken as L1.85E-042.00E-04Static Pressure in TubesAvailable Head

Heat Transferconvective boiling coefficient Chen'smethodCritical pressure F55.02barCritical pressure W220.6bar22060000Critical pressure55.02bar5502000PaThis is for FU onlyNucleate boiling coefficientMostinski eqnq for mostinskih_nb3319.1W/m2.CVapor quality (mass vap/total), x0.2Viscosity vapor1.38E-05Pa.s0.000011.34E-05From Condenser dataDensity vapor at tube exit2.26kg/m31/Xtt4.99k, L0.688W/mKCp, L4200J/kgKPr L1.24water, fluid1.121.13E+00From condenserMass flow, L only in tubes0.50kg/sMass flux, L only in tubes1kg/m2/sVelocity0.0005m/sRe_L135-can use Gde re condensationj_h0.0043.5re: Fig 12.23Nu 1Viscosity correction factor1Neglecth_i1.9check formulaf_c convective boiling factor8re:Fig12.581,680f_s nucleate suppression boiling factor0.50re:Fig12.59h_cb at outlet conditions1,674W/m2/C

Re_L at inlet272j_h0.0032.5re:Fig12.23Nu1check formulah_i3check formulaMean coefficient838W/m2/COverall USteam coefficient8000W/m2/Cho IGNORE2923W/m2KFrom condenser2923hof8000W/m2Kwater coldhi 838W/m2Khif IGNORE5000W/m2KprocessMaterial, kw IGNORE21.4W/m2K1/U0.00140.0019896657Calculated U726W/m2/Cq6WdTlm37.5CRequired U933W/m2.C -25%limit-3030CheckTRUETRUE

FiguresTowlerTowler

SteamP10.0barP31.7barT187C460KT237C510KHvap1,989,000J/kgHvap1,773,000J/kgkf0.631W/mKkg0.045

Duty20,463,398WMass steam10.29kg/sWant 10 kg/s324.5kt/y10.2882846241

$A6293.3134570173sqftfd0.7758241595Utubefm1.9CS/304fp1.14-6 barCb83446.3758676714C164,802.71$00.002810.978.030.03289.03