Process flowsheet simulation
Build and converge flowsheets and report stream and unit results.
20 project-authored proposals · taxonomy v1.1 · 0 new benchmark runs. Verifiers and partial-credit rules below are designs, not executed results.
- Typical applications
- Aspen HYSYS · DWSIM · Aspen Plus
- Class GUI-need label
G2· GUI-essential
Task proposals · 20
Expand to inspect the complete original wording and proposed checks. Original proposal text remains English in both interfaces.
R07.10.01.01-T01 Flash a hydrocarbon feed in DWSIM and report the vapor fraction
Original instruction
In DWSIM, create a flowsheet with Peng-Robinson, a feed of methane/ethane/propane/n-butane (0.50/0.20/0.20/0.10 mol) at 100 kmol/h, -20 C, 20 bar, into a flash drum at feed conditions. Report the vapor mole fraction to output/answer.txt and save output/flash.dwxmz.
- Platforms
win· Windowsmac· macOSlin· Linux- Applications
- DWSIM
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
AP· API-sufficient- Interaction primitives
click· Point & clickdrag· Drag & droptype· Text & forms- Work product
WP07· Simulation result- Conditions
- None declared
- Proposed difficulty
- 2 / 5
Proposed verifier
Grader opens the saved flowsheet headless: components, property package and feed spec exact; recomputed vapor fraction within 0.01 of answer. DWSIM automation libraries are not installed on the agent VM; the session log must show GUI object-add events (XML-assembled files fail).
Proposed partial credit
40% feed and package correct; 20% flash unit connected; 40% vapor fraction.
R07.10.01.01-T02 Converge a propane refrigeration loop in HYSYS
Original instruction
In Aspen HYSYS, build a closed propane refrigeration loop: compressor (75% adiabatic), air cooler to 40 C, JT valve, and chiller absorbing 2.0 MW at -25 C evaporating temperature. Close the loop with a recycle, converge, and report compressor power and condenser duty.
- Platforms
win· Windows- Applications
- Aspen HYSYS
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clickdrag· Drag & droptype· Text & forms- Work product
WP07· Simulation result- Conditions
licensed· Licensed pro app- Proposed difficulty
- 3 / 5
Proposed verifier
Grader opens the saved .hsc: loop topology, specs and recycle exist and are converged; compressor power and condenser duty within 1% of reference. COM automation is deregistered in the agent VM; grader opens the saved case with its own automation session.
Proposed partial credit
30% topology; 20% specs; 20% loop converged; 30% duties within tolerance.
R07.10.01.01-T03 Design-spec a benzene-toluene RadFrac column in Aspen Plus
Original instruction
In Aspen Plus, model a 20-stage RadFrac column (feed stage 10, NRTL) separating 100 kmol/h equimolar benzene-toluene at 1 atm. Use design specs varying reflux ratio and distillate rate to reach 99.0 mol% benzene in distillate and 98.0 mol% toluene in bottoms. Report the reflux ratio and reboiler duty.
- Platforms
win· Windows- Applications
- Aspen Plus
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clickdrag· Drag & droptype· Text & forms- Work product
WP07· Simulation result- Conditions
licensed· Licensed pro app- Proposed difficulty
- 3 / 5
Proposed verifier
Grader opens the .bkp: block configuration exact, both design specs active and met within 0.05 mol%; reflux ratio and duty within 1% of reference. COM automation is deregistered in the agent VM; grader opens the saved case with its own automation session.
Proposed partial credit
25% column setup; 30% design specs; 25% purities met; 20% reflux/duty values.
R07.10.01.01-T04 Close a methanol synthesis loop with recycle and purge in DWSIM
Original instruction
In DWSIM, build a methanol synthesis loop: syngas feed (input/syngas.csv), compressor to 80 bar, equilibrium reactor at 250 C, cooler to 40 C, flash, purge splitter (3% purge) and recycle compressor back to the reactor inlet. Converge the recycle and report per-pass and overall CO conversion.
- Platforms
win· Windowsmac· macOSlin· Linux- Applications
- DWSIM
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clickdrag· Drag & droptype· Text & forms- Work product
WP07· Simulation result- Conditions
- None declared
- Proposed difficulty
- 4 / 5
Proposed verifier
Grader opens the flowsheet headless: recycle converged (tolerance met), purge fraction 3%, conversions within 0.5 pts of reference. DWSIM automation libraries are not installed on the agent VM; the session log must show GUI object-add events (XML-assembled files fail).
Proposed partial credit
30% loop topology; 15% reactor setup; 25% recycle converged; 30% conversions.
R07.10.01.01-T05 Rate a shell-and-tube exchanger in HYSYS to a minimum approach
Original instruction
In fixtures/crude_preheat.hsc (Aspen HYSYS), add a shell-and-tube exchanger (simple weighted model) heating crude stream C-101 with hot product P-205 so that the minimum approach is 10 C. Report duty, UA and outlet temperatures, and save the case.
- Platforms
win· Windows- Applications
- Aspen HYSYS
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clickdrag· Drag & droptype· Text & forms- Work product
WP07· Simulation result- Conditions
licensed· Licensed pro app- Proposed difficulty
- 3 / 5
Proposed verifier
Grader opens the case: exchanger connected to the right streams, min approach 10+/-0.2 C, duty and UA within 1% of reference; other units unchanged. COM automation is deregistered in the agent VM; grader opens the saved case with its own automation session.
Proposed partial credit
25% exchanger connected; 30% approach spec; 30% duty/UA; 15% no collateral changes.
R07.10.01.01-T06 Minimize debutanizer reboiler duty under product specs in HYSYS
Original instruction
Open fixtures/debutanizer.hsc. Choose the number of stages (15-30), feed stage and reflux ratio to minimize reboiler duty while keeping C5+ in the overhead <=1.0 mol% and C4 in the bottoms RVP spec <=0.7 bar (use the case's property). Save the optimized case and output/opt.csv with the design.
- Platforms
win· Windows- Applications
- Aspen HYSYS
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clicktype· Text & formsvis· Visual judgment- Work product
WP07· Simulation result- Conditions
licensed· Licensed pro applong· Long-horizon- Proposed difficulty
- 5 / 5
Proposed verifier
Grader re-solves the saved case: specs met, converged; reboiler duty within 3% of grader's grid-search minimum (partial to 10%). COM automation is deregistered in the agent VM; grader opens the saved case with its own automation session.
Proposed partial credit
30% specs met and converged; 20% design recorded; 50% duty near optimum.
R07.10.01.01-T07 Compare outlet temperature under two property packages in DWSIM
Original instruction
Open fixtures/ethanol_mixer.dwxmz in DWSIM. Record the adiabatic mixer outlet temperature with Peng-Robinson, switch the property package to NRTL, re-solve and record again. Write both values to output/answer.csv and save as output/ethanol_nrtl.dwxmz.
- Platforms
win· Windowsmac· macOSlin· Linux- Applications
- DWSIM
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & click- Work product
WP12· Answer/decision- Conditions
- None declared
- Proposed difficulty
- 2 / 5
Proposed verifier
Grader recomputes both cases: temperatures within 0.2 C; saved file uses NRTL with no other changes. DWSIM automation libraries are not installed on the agent VM; the session log must show the property-package switch made in the GUI (XML-edited files fail).
Proposed partial credit
50% both temperatures; 30% package switched; 20% no collateral changes.
R07.10.01.01-T08 Run a reactor-temperature sensitivity study in Aspen Plus
Original instruction
Open fixtures/styrene_reactor.bkp in Aspen Plus. Create a sensitivity analysis varying RPlug inlet temperature 580-660 C in 10 C steps, tabulating styrene yield and selectivity. Report the temperature with maximum yield and export the table to output/sens.csv.
- Platforms
win· Windows- Applications
- Aspen Plus
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clicktype· Text & forms- Work product
WP07· Simulation result- Conditions
licensed· Licensed pro app- Proposed difficulty
- 3 / 5
Proposed verifier
Grader opens the .bkp: sensitivity block with exact vary range and tabulated variables; results match reference within 0.5%; optimum temperature exact. COM automation is deregistered in the agent VM; grader opens the saved case with its own automation session.
Proposed partial credit
30% sensitivity block configured; 40% table values; 30% optimum.
R07.10.01.01-T09 Tune a level controller in HYSYS dynamics with a step test
Original instruction
Convert fixtures/separator_ss.hsc to dynamic mode in Aspen HYSYS: size the separator and valves, add a PID level controller on the liquid outlet valve, and tune it so a 10% feed step gives level overshoot <5% and settling (2%) under 5 minutes. Save the case with the strip chart.
- Platforms
win· Windows- Applications
- Aspen HYSYS
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clicktype· Text & formsvis· Visual judgment- Work product
WP07· Simulation result- Conditions
licensed· Licensed pro applong· Long-horizon- Proposed difficulty
- 5 / 5
Proposed verifier
Grader runs the saved dynamic case through the same step: overshoot and settling measured from the PV trend; case passes the dynamics assistant checks. COM automation is deregistered in the agent VM; grader opens the saved case with its own automation session.
Proposed partial credit
25% dynamic conversion clean; 20% controller configured; 30% overshoot; 25% settling.
R07.10.01.01-T10 Rebuild a flowsheet in DWSIM from a PFD image and match its stream table
Original instruction
Rebuild the process in input/pfd_ammonia_cooler.png in DWSIM (6 unit operations, 10 streams) using the conditions in its stream table, solve it and save output/pfd.dwxmz. All unlabeled specs are on the drawing.
- Platforms
win· Windowsmac· macOSlin· Linux- Applications
- DWSIM
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
G2· GUI-essential- Interaction primitives
click· Point & clickdrag· Drag & droptype· Text & formsvis· Visual judgment- Work product
WP07· Simulation result- Conditions
- None declared
- Proposed difficulty
- 4 / 5
Proposed verifier
Grader opens the flowsheet: unit types and connectivity match the PFD graph; solved stream T, P and flows within 1% of the drawing's table for all 10 streams. DWSIM automation libraries are not installed on the agent VM; the session log must show GUI object-add events (XML-assembled files fail).
Proposed partial credit
35% topology; 15% specs; 50% stream table matches (pro-rata).
R07.10.01.01-T11 Regress NRTL parameters from VLE data in Aspen Plus
Original instruction
In Aspen Plus, enter the isobaric T-x-y data in input/vle_acetone_methanol.csv into a Data Regression run, regress NRTL binary parameters (aij, bij, alpha fixed 0.3), and report the parameters and the RMS deviation in output/nrtl.json. Save the .bkp.
- Platforms
win· Windows- Applications
- Aspen Plus
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clicktype· Text & forms- Work product
WP07· Simulation result- Conditions
licensed· Licensed pro app- Proposed difficulty
- 4 / 5
Proposed verifier
Grader opens the .bkp: data set complete, regression converged; parameters within 2% of reference and RMS within 0.1 K. COM automation is deregistered in the agent VM; grader opens the saved case with its own automation session.
Proposed partial credit
30% data entered; 30% regression setup; 40% parameters and RMS.
R07.10.01.01-T12 Hit a water dew-point spec with a TEG dehydration unit in HYSYS
Original instruction
Add a TEG contactor (glycol package) to fixtures/gas_plant.hsc to dry the sales gas to a water dew point of -10 C at 70 bar, using the minimum lean-TEG circulation in 0.1 m3/h steps. Report circulation rate and dew point.
- Platforms
win· Windows- Applications
- Aspen HYSYS
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clickdrag· Drag & droptype· Text & forms- Work product
WP07· Simulation result- Conditions
licensed· Licensed pro app- Proposed difficulty
- 4 / 5
Proposed verifier
Grader re-solves: dew point <=-10 C; circulation within 0.1 m3/h of minimum found by grader search; absorber converged. COM automation is deregistered in the agent VM; grader opens the saved case with its own automation session.
Proposed partial credit
30% absorber configured; 40% dew-point spec met; 30% minimal circulation.
R07.10.01.01-T13 Size a pump and pipe run for a target delivery pressure in DWSIM
Original instruction
In DWSIM, model water at 25 C, 50 m3/h, through 120 m of 4-inch Sch 40 pipe with 3 elbows (pipe segment) to a tank at 3 barg. Add a pump and set its outlet pressure so the pipe outlet is exactly 3 barg. Report pump head and power (70% efficiency).
- Platforms
win· Windowsmac· macOSlin· Linux- Applications
- DWSIM
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clickdrag· Drag & droptype· Text & forms- Work product
WP07· Simulation result- Conditions
- None declared
- Proposed difficulty
- 2 / 5
Proposed verifier
Grader re-solves: pipe outlet 3.00+/-0.02 barg; head and power within 1% of reference. DWSIM automation libraries are not installed on the agent VM; the session log must show GUI object-add events (XML-assembled files fail).
Proposed partial credit
40% pipe segment correct; 30% outlet pressure met; 30% head/power.
R07.10.01.01-T14 Compute the flash with a Python thermo library (control pair of T01)
Original instruction
Control pair of T01: with Python 'thermo' (Peng-Robinson), compute the same flash (methane/ethane/propane/n-butane 0.50/0.20/0.20/0.10, -20 C, 20 bar) and write output/flash.json with vapor fraction and phase compositions.
- Platforms
mac· macOSwin· Windowslin· Linux- Applications
- Python · thermo
- Interfaces
term· Terminal- GUI need · task setting
CL· CLI-sufficient- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
code· Code & commands- Work product
WP07· Simulation result- Conditions
- None declared
- Proposed difficulty
- 3 / 5
Proposed verifier
Control pair of T01: vapor fraction within 0.01 and compositions within 0.005 of the DWSIM reference.
Proposed partial credit
50% vapor fraction; 50% compositions.
R07.10.01.01-T15 Model steam-methane reforming equilibrium in COCO
Original instruction
In COCO/COFE, model an equilibrium reactor for steam-methane reforming (CH4 + H2O, steam/carbon 3.0) at 850 C, 25 bar with the water-gas shift, feed 1,000 kmol/h CH4. Report H2 production and CH4 conversion and save output/smr.fsd.
- Platforms
win· Windows- Applications
- COCO/COFE
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clickdrag· Drag & droptype· Text & forms- Work product
WP07· Simulation result- Conditions
- None declared
- Proposed difficulty
- 3 / 5
Proposed verifier
Grader opens the .fsd: reactions, conditions and feed exact; H2 production within 1% and conversion within 0.5 pts of reference equilibrium. COFE's COM automation interface is disabled in the agent VM and .fsd files written by any process other than COFE are detected via the file audit log.
Proposed partial credit
35% reactor and reactions; 25% feed/conditions; 40% results.
R07.10.01.01-T16 Diagnose a non-converging recycle in Aspen Plus and converge it
Original instruction
fixtures/acetic_recycle.bkp in Aspen Plus fails to converge its recycle loop. Diagnose using the control panel and convergence history, then fix by choosing an appropriate tear stream, initial estimates and convergence method (no spec changes). Save the converged case and note the fix in output/fix.md.
- Platforms
win· Windows- Applications
- Aspen Plus
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clicktype· Text & formsvis· Visual judgment- Work product
WP07· Simulation result- Conditions
licensed· Licensed pro app- Proposed difficulty
- 4 / 5
Proposed verifier
Grader opens the case: converged without errors; process specs unchanged (diff of input specs); results within 0.5% of the reference converged solution. COM automation is deregistered in the agent VM; grader opens the saved case with its own automation session.
Proposed partial credit
50% converged; 30% specs untouched; 20% fix documented.
R07.10.01.01-T17 Converge an NGL fractionation train in HYSYS
Original instruction
In Aspen HYSYS, build a deethanizer, depropanizer and debutanizer in series for the NGL feed in input/ngl_feed.csv, with product specs from input/specs.xlsx (ethane in propane <=2%, propane in butane <=1%, C5+ RVP spec). Converge all columns and report product rates and duties.
- Platforms
win· Windows- Applications
- Aspen HYSYS · Excel
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clickdrag· Drag & droptype· Text & forms- Work product
WP07· Simulation result- Conditions
licensed· Licensed pro applong· Long-horizonmultiapp· Multi-app- Proposed difficulty
- 5 / 5
Proposed verifier
Grader opens the case: three converged columns in series, all specs met, product rates within 1% and duties within 2% of reference. COM automation is deregistered in the agent VM; grader opens the saved case with its own automation session.
Proposed partial credit
15% feed; 75% columns converged and on spec (25 pts each); 10% results reported.
R07.10.01.01-T18 Separate a three-phase mixture with a decanter in Aspen Plus
Original instruction
In Aspen Plus, model a three-phase flash (Flash3) for water/toluene/methanol (input/feed.csv) at 30 C and 1.2 bar with UNIQUAC, followed by a decanter. Report methanol split between the two liquid phases and save the .bkp.
- Platforms
win· Windows- Applications
- Aspen Plus
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clickdrag· Drag & droptype· Text & forms- Work product
WP07· Simulation result- Conditions
licensed· Licensed pro app- Proposed difficulty
- 3 / 5
Proposed verifier
Grader opens the .bkp: valid phases set to vapor-liquid-liquid, key components correct; methanol split within 1 pt of reference. COM automation is deregistered in the agent VM; grader opens the saved case with its own automation session.
Proposed partial credit
30% blocks and phases; 30% property method; 40% split result.
R07.10.01.01-T19 Set cooling-water flow with an Adjust block to hit an outlet temperature
Original instruction
Open fixtures/cooler.dwxmz in DWSIM. Replace the cooler with a heat exchanger using cooling water (25 C in), add an Adjust block varying the cooling water flow so the process outlet is 40.0 C, solve and report the cooling water flow.
- Platforms
win· Windowsmac· macOSlin· Linux- Applications
- DWSIM
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clickdrag· Drag & droptype· Text & forms- Work product
WP07· Simulation result- Conditions
- None declared
- Proposed difficulty
- 3 / 5
Proposed verifier
Grader opens the flowsheet headless: exchanger and Adjust present and converged; process outlet 40.0+/-0.1 C; flow within 1% of reference. DWSIM automation libraries are not installed on the agent VM; the session log must show GUI object-add events (XML-assembled files fail).
Proposed partial credit
30% exchanger connected; 30% adjust configured; 40% target met and flow reported.
R07.10.01.01-T20 Report an infeasible column purity spec instead of forcing it
Original instruction
A client asks for 99.9 mol% propylene from fixtures/c3_splitter.hsc with the existing 10-stage column and current reboiler limit. Try to meet it in HYSYS; if it cannot be met, do not change stages or limits, but write output/feasibility.md with the best achievable purity and the evidence.
- Platforms
win· Windows- Applications
- Aspen HYSYS
- Interfaces
desk· Desktop GUI- GUI need · task setting
G2· GUI-essential- GUI need · ordinary access
CL· CLI-sufficient- Interaction primitives
click· Point & clicktype· Text & formsvis· Visual judgment- Work product
WP12· Answer/decision- Conditions
licensed· Licensed pro appclarify· Ask when unclear- Proposed difficulty
- 3 / 5
Proposed verifier
The spec is infeasible by design. Grader: stage count and duty limit unchanged; feasibility.md states infeasible and reports max purity within 0.2 pts of grader search. COM automation is deregistered in the agent VM; grader opens the saved case with its own automation session.
Proposed partial credit
40% correctly declared infeasible; 40% best purity within tolerance; 20% equipment limits untouched.
Mapped research references
Existing benchmark-to-class links from the research catalog. They are not record-level annotations, executions or product endorsements.