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Session 3.3

Aspen Hysys -Unit Operation

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Revise

Cch thit lp mt qu trnh m phng?

Thu thp d liu -> La chn s cng ngh -> Chn phnmm m phng -> Tin hnh m phng -> Phn tch kt qu ->Kt lun

Tin hnh m phng trn Aspen Hysys

Basis Manager: component, FP, hypothetical, RXN,..

Simulation Enviroment:

+ Thm dng vt cht (tnh ton flash, s dng utilities, inbo co stream v workbook)

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Unit operation

Steady state Unsteady state

Physical Reactors(General, CSTR, PFR)

Movers (Pump,Compressor,Expander, Valve)

Mixer

Splitter (Tee)

Exchangers (Air Cooler,Heater/Cooler, Heat

Exchanger, S&T LNG)

Flash Drums (2-phase (VL), 3-phase (VLL))

Separators (Component Splitter, Distiller,

Absorber, CycloneCyclone, Gas filterfilter, Extractor)

Pipe segment

Tank

FurnaceF

Air Cooler

Logical Set

Adjust

Recycle

Balance

Spreadsheet

PID Controller

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Phng php Thc hin

S dng thanhmenu

T mc Flowsheet trn thanh menu, la chn AddOperationHoc nF12.Ca s UnitOps s xut hin.

S dngWorkbook MWorkbook v chuyn n mc UnitOps,sau kch vo nt Add UnitOp.Ca s UnitOps s xut hin.

S dng bng ni T mc FlowSheet trn thanh menu, la chn OpenObject Palette, hoc nF4. Kch pvo biu tngca thit bm chng ta mun nhp.

S dng bng nikt hp vi s trn mn hnh

S dng chut phi,ko v th biu tng t bng nivo s trn mn hnh.

Cch a cc thit b vo trong PFD

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Cch 3. UnitOps (F12)

Cch 1. Object Palette (F4)

Cch a cc thit b vo trong PFD

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Kt ni dng vi cc thit b Open unit operation window

Choose stream to connect from Inlet and Outlet drop down menus

Some unit operations require energy streams as well

If the name of a stream that does not exist is entered manually, HYSYSwill create that stream

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3.3.1. Pumps

Mc ch: tng p sut ca dng lng vo. Tythuc vo tham s c khai bo ban u s tnhton nhit , p sut cha bit, hoc cng sutca bm

Mc tiu:

Thit lp c bm trong Hysys m phng ccqu trnh bm

Kt ni cc dng vi thit b

Xc nh cng sut ca bm v nhit dng ra

We learn 10% of what we read; 20% of what we hear; 30% of what we see; 50% of what we see and hear;70% of what we discuss; 80% of what we experience; 95% of what we teach others

Pumps - Nguyn l tnh ton

Cc tnh ton c da trn phng trnh chun cho cng sut, sdng tng p, tc v cng dng chy:

Trong : P out= p sut dng ra

Pin = p sut dng vo bm

DensityLiquid

RateFlowPPquiredPower inoutideal

=

)(Re

Cng sut cn thit thc t ca my bm c xc nh theo

hiu sut bm:

%100Re

Re(%) =

actual

ideal

quiredPower

quiredPowerEfficiency

Khi hiu sut nh hn 100%, nng lng d s c dng tngnhit ca dng ra.

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Pumps - Nguyn l tnh ton

Kt hp nhng phng trnh trn, s c cng sut cn thit thc tca my bm:

(%)

%100)(Re

EfficiencyDensityLiquid

RateFlowPPquiredPower inoutideal

=

Nu nh dng nguyn liu c xc nh y , ch cn cung cphai trong nhng bin sau Pump c th tnh ton tt c cc bin chabit:

p sut dng ra hoc s gim p sutHiu sutNng lng bm

We learn 10% of what we read; 20% of what we hear; 30% of what we see; 50% of what we see and hear;70% of what we discuss; 80% of what we experience; 95% of what we teach others

Pumps - DesignPumps can be specified in two ways: If inlet and outlet streams connected to a pump are fully specified, then nothing needs

to be specified in the pump unit operation If outlet pressure is not specified, then a pressure differential across the pump, or a

duty must be specified

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Pumps Example

Dng Feed:

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Pumps Example

Thit lp pump vi cc thng s sau:

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Pumps Example

Kt qu

Ch rng nu nh bn khngchn On Pump Switch, trngthi ca dng Feed s cchuyn thng sang Outlet.

We learn 10% of what we read; 20% of what we hear; 30% of what we see; 50% of what we see and hear;70% of what we discuss; 80% of what we experience; 95% of what we teach others

3.3.2. Compressor/Expander

Mc ch: My nn (Compressor) l thit b dng tng p sut dng kh

vo. Ph thuc cc thng tin c cho trc, my nn s tnhton cc tnh cht khc ca dng (nh p sut hay nhit )hoc hiu sut nn.

Tuc bin gin n kh (Expander) l thit b c s dng lmgim p ca dng kh vo c p sut cao to ra dng ra vip sut thp v vn tc nhanh. Qu trnh gin n bao gm qutrnh chuyn ni nng ca kh sang ng nng v cui cng l

sang cng c ch. Mc tiu: Sau khi hc xong ngi s dng c th: Thao tc vi Compressor/Expander trong Hysys m phng

qu trnh ch bin kh Xc nh cng sut ca Compressor/Expander v nhit u

ra ca dng

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We learn 10% of what we read; 20% of what we hear; 30% of what we see; 50% of what we see and hear;70% of what we discuss; 80% of what we experience; 95% of what we teach others

Compressor/Expander Nguyn l

i vi my nn, hiu sut ng entropy c tnh bng t s ca nng lng ngentropy yu cu cho qu trnh nn vi nng lng yu cu thc t

i vi thit b Expander, hiu sut c cho l t s ca nng lng thc t c to ratrong qu trnh gin vi nng lng to ra trong mt qu trnh gin ng entropy

Power Requiredactual = Heat Flowoutlet Heat Flowinlet

Power Producedactual = Heat Flowoutlet Heat Flowinlet

We learn 10% of what we read; 20% of what we hear; 30% of what we see; 50% of what we see and hear;70% of what we discuss; 80% of what we experience; 95% of what we teach others

Compressor/Expander Nguyn lHiu sut

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Compressor/Expander Cc hng gii quyt

Khng dng th Dng th

Bit Flow rate v Inlet Pressure

Khai bo Outlet Pressure

Khai bo Adiabatic or Polytropic efficiency

(Hiu sut ca ch on nhit hoc a bin)

HYSYS s tnh ton c:Required Energy

Outlet temperature

Other efficiency

Bit Flow rate v Inlet pressure

Khai bo Operating speed

HYSYS s dng biu Xc lp Efficiency

Xc lp Head

HYSYS tnh ton:outlet pressure,

outlet temperature,

applied duty

Bit Flow rate v Inlet Pressure

Khai bo Efficiency and Duty

(Hiu sut v Nng sut)

HYSYS s tnh ton:Outlet pressure

Outlet temperature

Other efficiency

Bit Flow rate v efficiency

HYSYS ni suy t biu xc lp:operating speed

head

HYSYS tnh ton:outlet pressure

outlet temperature

applied duty

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Mc Connection tng t nh vi my pump

Parameters Page

Compressor/Expander Design

Nu khng s dng cc th, cungcp bn trong s cc bin s sau,v gi tr th 5 s c tnh ton,theo cng sut:Nhit dng vop sut dng voNhit dng ra

p sut dng raHiu sut

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Tab RatingTab Rating bao gm 4 trang: th (Curves),

Gii hn dng (Flow Limits), Nozzles, vInertia.

Curves Page

1. Chn hp Enable Curves.2. La chn hiu sut on nhit hay a bin, s

dng phm tng ng. y l c s xc nh gitr hiu sut dng vo.

3. Bm vo phm Add Curve vo giao dinCurve.

4. Trn giao din hin th Curve, bn c th nhpcc im d kin Flow, Head v %Efficiency,cng nh gi tr Speed cho mt th n.

5. Vi mi th thm vo, thao tc li bc 3 v 4.Loi hiu sut phi thng nht vi tt c tha vo.

Compressor/Expander

Design

We learn 10% of what we read; 20% of what we hear; 30% of what we see; 50% of what we see and hear;70% of what we discuss; 80% of what we experience; 95% of what we teach others

Dng nguyn liu

Compressor/Expander Example

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Thit lp My nn

Compressor/Expander

Example1. Trn trang Parameter, xa gi tr

Adiabatic Efficiency mc nh. C hiusut on nhit v a bin nn trng trnh li khng ng nhthoc cung cp tha c tnh cho mynn.

2. Vo tab Rating, v m trang Curves.3. Chc chn rng phm on nhit

(Adiabatic) trong nhm Efficiency c chn.

4. Chn hp Enable Curves, v bm

vo phm Add Curve.5. Hon thnh thit lp th nh trong

giao din sau.

We learn 10% of what we read; 20% of what we hear; 30% of what we see; 50% of what we see and hear;70% of what we discuss; 80% of what we experience; 95% of what we teach others

Cc iu kin ca dng ra c th c xem tab Performanceca bng hin th tnh cht Compressorv c biu din nh bng di y:

Compressor/Expander Example

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3.3.3. Heater and Cooler

L thit b trao i nhit mt chiu. Dng vo c lm lnhhoc gia nhit t c iu kin yu cu dng ra. Dngnng lng hp th (hoc cung cp) do chnh lch Enthalpygia hai dng. Cng c m phng ny hu ch khi ch quan tmti dng nng lng yu cu bao nhiu lm lnh hoc gianhit dng qu trnh, m khng quan tm n iu kin khc.

Biu tng Cooler Biu tng Heater

We learn 10% of what we read; 20% of what we hear; 30% of what we see; 50% of what we see and hear;70% of what we discuss; 80% of what we experience; 95% of what we teach others

Heater and Cooler Nguyn l

Cooler v Heater s dng cng mt phng trnh c s. Skhc nhau theo quy c v du. Xc nh r dng nng lngtuyt i ca cc dng v Hysys s thm cc gi tr sau:

- Vi Cooler, Enthalpy v dng nhit nng b tr t dng vo:

Heat Flowinlet - Dutycooler= Heat Flowoutlet- Vi Heater, dng nhit nng c cng vo:

Heat Flowinlet + Dutycooler= Heat Flowoutlet

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Heater and Cooler Design

Like pumps, heaters and coolers can be specified in two ways If both the inlet and outlet streams are fully specified, then nothing needs to be

specified in the pump unit operation If the outlet stream is underspecified, then the heater or cooler can be solved by

specifying the pressure differential and/or the duty

We learn 10% of what we read; 20% of what we hear; 30% of what we see; 50% of what we see and hear;70% of what we discuss; 80% of what we experience; 95% of what we teach others

Heater and Cooler Example

Mt dng kh cn lm lnh tnhit 60F ti 105F vi gim p sut 15 psi.

Property

Package

Components

Peng Robinson Nitrogen, Carbon Dioxide,

C1, C2, C3, i-C4, n-

C4, i-C5, n-C5, n-C6,

n-C7, n-C8

Worksheet

[Conditions]

Temperature 60.0000 F

Pressure 600.0000 psi

Molar Flow 100.0000 lbmole/hr

Worksheet

[Composition]

Nitrogen 0.0149

CO2 0.0020

Methane 0.9122

Ethane 0.0496

Propane 0.0148

i-Butane 0.0026

n-Butane 0.0020

i-Pentane 0.0010

n-Pentane 0.0006

n-Hexane 0.0001

n-Heptane 0.0001

n-Octane 0.0001

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Heater and Cooler Example

Kt qu

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3.3.4. Shortcut distillation

Mc ch: xc nh nhanh s a l thuyt ti u ng vi t s hi lu cathp

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Cu t (Component) Mole Fraction

Ethylene 0.0002

Ethane 0.0002

Propene 0.5734

Propane 0.0246

i-Butane 0.0051

i-Butene 0.0489

1-Butene 0.0235

13-Butadiene 0.1295

n-Butane 0.0032

cis2-Butene 0.0061

tr2-Butene 0.0072

n-Pentane 0.031

n-Hexane 0.028n-Octane 0.0255

Toluene 0.0936

Tn dng

(Name)

Feed

Temperature

(oC)

83.3

Pressure (bar) 24

Flowrate (kg/h) 24000

Dng nguyn liu c thm vo vi s liu sau

Shortcut distillation

Fluid Package: Peng Robinson

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Trn Connections page ca design tab nhp y cc thng tin chodng c kt ni vi thit b:

Shortcut distillation

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Trn Parameters page ca design tab nhp y cc thng shot ng ca thp:

Shortcut distillation

We learn 10% of what we read; 20% of what we hear; 30% of what we see; 50% of what we see and hear;70% of what we discuss; 80% of what we experience; 95% of what we teach others

Sau khi nhp y s liu, Hysys s tnh ton, kt qu tnh tonc hin th trn Performance tab.

Shortcut distillation

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S dng Databook (Ctrl+D) kho st s liu

1. Thm cc variable: y cn kho st t s hi lu ngoi(external reflux) v s a thc t (actual trays)

Kho st s liu

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1. Chuyn sang th CaseStudies>Add

Chn External Reflux l Ind(Independent Variable)

Actual Trays l Dep(Dependent Variable)

2. View>Independent VariableSetup

Low Bound: 1.1

High Bound: 2.6

Step Size: 0.053. Start

Kho st s liu

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S liu kho st th hin didng bng:

Kho st s liu

We learn 10% of what we read; 20% of what we hear; 30% of what we see; 50% of what we see and hear;70% of what we discuss; 80% of what we experience; 95% of what we teach others

S liu kho st th hin di dng th:

Shortcut distillation

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Others Modules

Mixers/Tees Recycle operations Splitters

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Learning outcome in Session 3.3

Thnh tho cc thao tc vi Hysys

Cch thm mt s cc Unit phc v chocc bi ton (a cc thng s, kt ni vidng,..)

Hiu c mc ch, cch thc hot ng

ca mt s cc thit b. n li kin thc camn thit b phn ng v mn Thit b trongcng ngh Lc du