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Hysys Aspentech ca: cht lng trn gi (nhit ng lc hc) Ghi ch2009 04 THNG 12

tags: aspentech , Peng robinson , m phng qu trnh , cng c mphng , phng php nhit ng lc hc

b

i admin

Nu bn mi y, bn c th mun ng k ca ti ngun cp d liuRSS hoc nh du trang web ny. Bn c th tm thy cu tr li chomt vn xung ng. Cm n bn gh thm!

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Hysys Aspentech ca l mt cng c m phng qu trnh. Bn lunlun phi chn mt "gi cht lng" khi bn s dng chng trnh:mt phng php nhit ng lc hc n s s dng tnh ton tisn, c bit l cn bng hi lng. Ti xem mt "hi tho trn

web" c (bi thuyt trnh thng qua Internet) trn cc gi ti sn cah v ly mt s ghi ch.

Bn c th kt hp bi ny vi hng dn Hysys, trnh hng dn giti sn Hysys, t vn Aspentech H tr, v cun sch v m phng,

v t n tt c cng nhau la chn gi tt nht trong tng trnghp. Nu bn c nghi ngh trAspentech lun lun c th cungcp cho bn li khuyn c nhn. H c thc s kh tt ti mt cchnhanh chng cho thy phng php tt nht s dng.

Mt mo nh ghi nhl bn c th s dng gi cht lng khcnhau v danh sch cc thnh phn khc nhau trong cc phn khc

nhau ca cc m phng. Bn c th c mt gi Peng-Robinson chycc tnh ton cho cc hydrocacbon ca bn, v hi trn gi ASMEchy hi nc v tnh ton nc.

Di y l ghi chp ca ti t cc hi tho trn web:
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-Hydrocarbons: thng s dng mt phng trnh ca phng phpnh ncm hnh p sut hi c OKthp p lch s-Hot ng nh NRTL l m hnh cho ngi ngho

hydrocarbonPhng trnh ca Nh nc:-Peng-Robinson c tng cng nht trong Hysys, cao nht T & Pnhiu, c iu tr c bit cho cc thnh phn quan trng, ln nht csd liu tng tc nh phn: tiu chun tt cho hydrocarbon-bnh PRSV: mrng PR va phi h thng khng l tng v thhin tt hn thnh phn ngho v hn hp. Cho bit thm mt thams vo phng trnh. Tc tnh ton chm hn so vi Peng-

Robinson-SRK: Redlich i m hnh Kwong. Tng t nh chnh xc / sdng nh Peng Rob, nhng trong Hysys SRK c ci tin t hn PR.-PR-TWU, SR-TWU cho cht tan hydro? Trong cht lnghydrocacbon-TST: hydrocarbon vi cc thnh phn khng l tng (c s dngtrong gi glycol)-GCEOS: tng qut khi EOS cho ngi s dng thm cc tham sring ca h. S dng xy dng m hnh ca ring bn khi cn

thit-MBWR: mt bin th ca m hnh BWR c: 32 thng s, phngphp tip cn thc nghim hn, v vy n hot ng rt tt trongphm vi m n c d liu-Lee-Kesler-Pockler: BWR sa i i vi cc cht khng phn cc,hn hp-BWR: sa i BWR cho multicomponents, i hi phi th nghimd liu

-Zudkevitch Joffee: RK phng php ci bin cho VLE, h thng viH2-Kabadi-Danner: i SRK vi calcs lng lng cn bng trong hthng H2O-hydrocarbon lng, c bit l pha long, cc thng sphi c iu chnh th nghim d liu-chua PR / SRK: h thng nc chua vi H2S, CO2, NH3 mc thpn trung bnh P


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Hi p sut M hnh:

Nhng m hnh ny OK cho hydrocarbon. Trong lch s h cs dng k t khi tnh ton h c d dng hn. By givi mytnh hin i m hnh EOS l d dng chy, v vy m hnh p suthi c s dng t thng xuyn hn. Tuy nhin, Braun K10 vncn tt cho cc n v chn khng .Modified Antonie: OK cho p sut thp l tng h thngBraun-K10 Model: ng ch p dng cho Hydrocarbons nng @ pthp-Esso K: ch Hydrocarbons nng @ thp Bo ch

Phng php bn thc nghim:-Chao-Seader: hydrocarbon nu T = 0 - 500C , P


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-tin ch vi nc - s dng mt trong cc bng hi. Bn hi nc chdnh cho cc h thng nc 100% nhng l s la chn tt nht chocc h thng

Chnh sa:

2010-11-12 - Thm lu rng nhiu gi cht lng c th c chytrong m phng tng t

2009 DECEMBER 4

tags: aspentech, peng robinson, process simulation, simulationtool,thermodynamic method

by admin

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Aspentechs Hysys is a process simulation tool. You always have topick a fluid package when you use the program: a thermodynamicmethod it will use to calculate properties, especially vapour-liquidequilibria. I watched an old webinar (presentation given through

the Internet) on their property packages and took some notes.

You can combine this post with the Hysys manual, the Hysysproperty package wizard, Aspentech Supports advice, and books onsimulation, and put it all together to choose the best package in eachcase. If you are in doubtAspentech Support can always give you
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personalized advice. They are really quite good at quickly suggestingthe best method to use.

One trick to remember is that you can use different fluid packagesand different component lists in different parts of the simulation.

You can have a Peng-Robinson Package running the calculations foryour hydrocarbons, and the ASME Steam Package running thesteam and water calculations.

Here are my notes from the webinar:

-Hydrocarbons: normally use an Equation of State method-Vapour pressure models are OK at low pressures-Activity coefficient like NRTL is poor model for hydrocarbons

Equations of State:-Peng-Robinson is most enhanced in Hysys, highest T & P range,has special treatment for key components, largest binary interactiondatabase: good standard for hydrocarbons-PRSV: extends PR to moderately non-ideal systems and betterrepresents poor components and mixtures. Adds a new parameterto the equation. Slower calculation speeds than Peng-Robinson-SRK: modified Redlich Kwong model. Similar accuracy/use as PengRob, but in Hysys SRK has less enhancements than PR.

-PR-Twu, SR-Twu for hydrogen solutes? In liquid hydrocarbons-TST: hydrocarbons with non-ideal components (used in glycolpackage)-GCEOS: generalized cubic EOS for user to add their ownparameters. Use this to build your own model when necessary-MBWR: a modification of the old BWR models: 32 parameters,more empirical approach, so it works very well in the range where ithas data-Lee-Kesler-Pockler: modified BWR for non-polar substances,

mixtures-BWRS: modified BWR for multicomponents, requires experimentaldata-Zudkevitch Joffee: modified RK method for VLE, systems with H2-Kabadi-Danner: modified SRK with Liquid-Liquid-Equilibriumcalcs for liquid H2O-Hydrocarbon systems, especially dilute,


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parameters must be tuned to experimental data-Sour PR/SRK: sour water systems with H2S, CO2, NH3 at low tomoderate P

Vapour Pressure Models:

These models OK for hydrocarbons. Historically they were usedsince computationally they are easier. Now with modern computersEOS models are easy to run, so vapour pressure models are usedless often. However, Braun K10 is still good forvacuum units.-Modified Antonie: OK for low pressure ideal systems-Braun K10 Model: strictly applicable to only heavy Hydrocarbons@ low pressures-Esso K: only heavy Hydrocarbons @ low Press

Semi-Empirical methods:-Chao-Seader: hydrocarbons if T = 0-500C, P


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-Clean fuels for sulphur components & HC-Utilities with water use one of the steam tables. Steam tables areonly for 100% water systems but are the best choice for thesesystems

Edits:

2010-11-12 Added note that multiple fluid packages can be run inthe same simulation

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