Closed loop Process Flowsheets & Simulations
Explore 4 validated, solved Closed loop simulation flowsheets in MaximaLabs — real components: ammonia, propylene, r245fa, n2, co2, oxygen. Open any one directly in your browser.
Solved via: PENG-ROBINSON.
Ammonia refrigeration (−30 °C)
A closed single-stage ammonia vapor-compression cycle serving a −30 °C load: compressor → ambient condenser → JT valve → evaporator. The charge is set via tear_specs; metrics give duty and work (COP ≈ 2). From the ChemSep casebook (Refrigeration_Ammonia-30C).
4 unit ops • PENG-ROBINSON
17 0
View & openPropylene refrigeration (−30 °C)
Closed propylene cycle for −30 °C process cooling — the workhorse olefin-plant refrigerant. From the ChemSep casebook (Refrigeration_Propylene-30C).
4 unit ops • PENG-ROBINSON
17 0
View & openPropylene refrigeration (−50 °C)
The same propylene loop pulled to −50 °C by sub-atmospheric evaporation (0.8 bar) — COP drops as the lift grows. From the ChemSep casebook (Refrigeration_Propylene-50C).
4 unit ops • PENG-ROBINSON
17 0
View & openOrganic Rankine Cycle — marine diesel exhaust waste-heat recovery
A closed R245fa Rankine loop recovers waste heat from a heavy marine diesel engine's exhaust: a two-stream boiler vaporizes the working fluid against the hot exhaust gas, a real isentropic-efficiency turbine expands it to shaft power, an ambient-cooled condenser returns it to saturated liquid, and a pump restores boiler pressure. The exhaust-gas composition is a representative combustion-product mix (N2/CO2/O2/H2O), not a specific engine's measured flue analysis. Honesty note: the boiler's cold-outlet temperature is a fixed spec (not an approach-temperature/pinch rating against the real exhaust flow), so this demonstrates cycle convergence and net power, not a bounded heat-recovery-area design.
6 unit ops • PENG-ROBINSON
20 0
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