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MODULE 2
Propane Refrigeration Loop
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Gii thiu nhim v
H thng lm lnh c s dng rng ritrong cng ngh ho du v ch bin kh
c s dng trong qu trnh lm lnh
kh t c nhit im sngcn thit v sn xut cc sn phmlng.
Nhim v: Xy dng, chy m phng,
phn tch v iu chnh cc thng s caPropane Refigeration Loop. Chuynthnh template s dng trong cccase khc
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Mc tiu kha hc
To v kt ni cc Unit xy dnghon chnh Flowsheet
Thao tc vi Flowsheet
Hiu qu trnh tnh backward forwardtrong HYSYS
Chuyn case m phng thnh template
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Yu cu ti thiu
Bit cch nh ngha v to Fluid Package
To Stream
Kho st Workbook
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Process Overview
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Xy dng case m phng
1. To case m phng mi2. nh ngha Fluid Package: C3, Peng
Robinson
3. To cc Stream:
Tn 1 3
Vapor Fraction 0.0 1.0
Nhit 50 oC -20 oC
Thnh phn 100% C3
p sut ca Stream 1 l bao nhiu:_______?
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To Unit trong Flowsheet
Cc cch to Unit trong Flowsheet:
Menu Bar Flowsheet/Add Operation
hoc Workbook Workbook/UnitOps v Add
UnitOps
Object
Palette
Flowsheet/ Open Object
Palette hoc FPD/Object
Palette
Dng chut phi ko v thbiu tng Unit t ObjectPalette vo PFD
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Unit trong PRL
Propane Refrigeration Loop c 4 units:1. Valve
2. Chiller
3. Compressor
4. Condenser
S dng cc phng thc khc nhau
to Unit trong Flowsheet
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To J-T Valve
J-T Valve s dng model Valve, u vo J-TValve t Condenser trng thi Buble point
Bm
Chn Valve trong Available Unit
Nhn Add
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To J-T Valve
Trong phn Connections, in cc thng tinnh trong hnh di y:
Ghi ch: Trong phn Inlet/Outlet c th s dng drop down box chncc Stream c sn
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B sung Chiller
Thit b Chiller s dng model Heater trong HYSYS. ura ca dng cng ngh trng thi Dew point
S dng Workbook/Unit Ops/Add Unit Ops
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B sung Chiller
Chn Heat Transfer Equiment trong nhm Categories Chn Heater trong nhm Available Unit Operations
Bm nt Add
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B sung Chiller
Trong phn Connections in cc thng tin nh hnh diy:
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B sung Chiller
Trong phn Parameters xc nh chnh p qua Chiller l7 kPa, cng sut 1.00 e+06 kJ/h:
Lu lng ca dng Propane l:_______? St p qua J-T valve l:_______?
Nhit ca stream 2 l:_______?
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Thinking???
Gii thch ti sao HYSYS tnh c tt ccc thng s cn li???
Forward composition stream 3
Calculate pressure of stream 3
Backward pressure to stream 2
Calculate stream 2s temperature
Forward temperature to Chiller Trial calculation flowrate
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B sung my nn
Bm : hin th Object Palette Nhn kp vo biu tng Compressor Trong phn connections in cc thng tin sau:
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B sung my nn
Trong phn parameters in cc thng s nh hnh sau:
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B sung Condenser
Nm gia Compressor v Valve cnhim v a dng C3 t trng thi khv trng thi lng.
S dng model Cooler To bng phng php ko & th (Drag
n Drop)
1. Bm vo biu tng Cooler trn ObjectPalette
2. Ko vo trong Flowsheet v th vo v trmun t
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Kt ni Unit - Stream
Attach Mode 1. Nhn vo nt Attach Mode
2. Khi di chuyn con tr ti Unit, cc im ktni s hin th mu xanh dng m
3. Trn Stream 2 im kt ni In, Out
4. Ko im kt ni Out ca Stream ti imFeed Stream ca Unit
5. Ko im kt ni In ca Stream ti imProduct ca Unit
Phm Ctrl 1. Nhn v gi Ctrl trong khi di chuyn con trti Stream, HYSYS t ng chuyn sangAttach mode.
2. Thc hin nh phn Attach mode
3. Khi th Ctrl, HYSYS t ng tt ch Attach Mode
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B sung Condenser
Trong phn Parameters xc nh Delta P quaCondenser l 35 kPa
Cng sut ca my nn (HP) l:_______?
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S dng PFD
Object Inspection: bm phm phi trnbiu tng ca stream, unit
S dng :
To bng Properties
Xoay biu tng
Thay i tn
In n
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1 s Object Inspections
PFD Unit Operations Streams
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Chnh sa PFD
To tiu : Propane Refrigeration Loop
To Workbook Table cho cc MaterialStream
To Table cho dng Stream 4 B sung thng tin v Unit (Object
Inspection/Show Table)
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Lu case thnh template
Template l 1 Flowsheet hon chnhc lu trn a c th ni vi 1Flowsheet khc.
Thng thng, template l 1 module canh my hoc 1 cm cc thit b cngngh gn vi nhau.
Sau khi lu, template c th c
nhng vo 1 Flowsheet khc, 1 casekhc di dng Sub-Flowsheet. C th c nhng vo bt k
Flowsheet no, khng gii hn v s
lng
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Lu case thnh template
Xo gi tr Chiller Duty
T menu Simulation chn Main Properties
Nhn Convert to Template
Chn Yes, sau No khng lu thay i
Lu template vi tn C3Loop.tpl
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In kt qu
Trong Hysys, c th in kt qu ca Unit t: Thanh menu
Object Inspection ca Unit
Report Manager
MenuPrint:
Print Snapshot: In hnh nh ca ca s mnhnh ang chn
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In kt qu
Object Inspection: Chn Print Datasheet Report Manager:
T Menu chn Tools, Report truy cp Report Manager
Chn Createsau Insert Datasheet
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Tnh ton vi case m phng
Bi tp 1: Design & Rating Cng sut Compressor l 250 hp, ang vn hnh mc
90% cng sut v 72% hiu sut. Tnh cng sut lm mtca Chiller ?
Khi nng cng sut ca Chiller ln 1.5 MMBTU/hr khi khng
thay i Compressor th nhit Chiller thay i nh thno ?
Bi tp 2: Thnh phn cht lm mt Ni cung cp Propane cho bit phi s dng loi 95%
Propane, 5% Ethane. Hy nh gi nhng nh hng (nuc) i vi h thng ban u (khi Chill-Q=1e6kJ/h)
Base case 100% C3 New case 95% C3
Flow, kgmole/hr 107.9
Condenser Q, kJ/hr 1.587e6
Compressor Q, kJ/hr 5.866e5
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Th thch: Economizer
Thay i thnh h thng nn 2 cp bng cch thm vo thit b tch Tng cng sut tiu hao cho qu trnh nn l bao nhiu?
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Th thch: Economizer
Cc thng s ca h thng:
Thit b Thng s
Stream 1 T = 50oC
Vf = 0.0
Chiller Delta P = 7 kPa
Q = 1.0 e+06 kJ/h
Stream 3 T = -20oC
Vf = 1.0Stream 4 P = 625 kPa
Mixer Equalizer All Pressure
Condenser Delta P = 35 kPa
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Th thch: Economizer
Dng Case Study tm p sut ti u caStream 4 cng sut nn l nh nht