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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 AddOperationHocn F12.

CasUnitOpssxuthin.Sdng Workbook M Workbook v chuyn n mc UnitOps, sau

kch vo nt AddUnitOp.CasUnitOpssxuthin.

Sdngbngni T mc FlowSheet trn thanh menu, la chn OpenObject Palette,hocn F4. Kch p vo biu tngcathitb m chng ta munnhp.

S dng bng nikt hp vi s trn mn hnh

Sdngchutphi, ko v thbiu tng tbngnivo 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, HYSYS

will 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 sut

ca 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

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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 : Pout= 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:%100

Re

Re(%)

actual

ideal

quiredPower

quiredPowerEfficiency

Khi hiusutnhhn 100%, nng lngdsc dng tngnhitca dng ra.

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Pumps - Nguyn l tnh ton

Kthpnhngphng trnh trn, sc cng sutcnthitthctca my bm:

(%)

%100)(Re

EfficiencyDensityLiquid

RateFlowPPquiredPower inoutideal

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

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

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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 rngnunhbn khngchn On Pump Switch, trngthi ca dng Feed s c

chuynthng sang Outlet.

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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 lsang 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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Compressor/Expander

Nguyn li 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 FlowoutletHeat Flowinlet

Power Producedactual = Heat FlowoutletHeat Flowinlet

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Compressor/ExpanderNguyn l

Hiu sut

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Compressor/ExpanderCc 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/ExpanderDesign

Nu khng s dng cc th, cung

cp 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 Rating

Tab 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 nhp

cc 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/ExpanderDesign

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Dng nguyn liu

Compressor/ExpanderExample

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Thit lp My nn

Compressor/ExpanderExample

1. Trn trang Parameter, xa gi trAdiabatic 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 bmvo phm Add Curve.

5. Hon thnh thit lp th nh tronggiao din sau.

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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/ExpanderExample

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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 gia

nhit dng qu trnh, m khng quan tm n iu kin khc.

Biu tng Cooler Biu tng Heater

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Heater and CoolerNguyn 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 CoolerDesign

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 bespecified 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

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Heater and CoolerExample

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

PropertyPackage

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 FPressure 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 0.0020i-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 CoolerExample

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 0.028

n-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

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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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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 cho

cc bi ton (a cc thng s, kt ni vidng,..)

Hiu c mc ch, cch thc hot ngca mt s cc thit b. n li kin thc camn thit b phn ng v mn Thit b trongcng ngh Lc du