LNG liquefaction, the real C3MR cascade
Natural gas precooled by a closed propane loop, then liquefied against a closed mixed-refrigerant loop in a multi-stream cryogenic exchanger.
The actual dark-mode canvas (simplified for this preview — the real flowsheet's exact refrigerant charges are set via tear specs): natural gas precooled by a closed propane loop, then liquefied to ~120 K against a closed mixed-refrigerant loop.
Multi-stream exchanger, not a simple two-stream HX
Every hot and cold stream in the cryogenic bundle closes one shared enthalpy balance — the same free-stream closure a real APCI C3MR main exchanger runs, not a chain of two-stream heat exchangers.
Unit ops shipped for this vertical
Enthalpy-based free-stream closure across every hot/cold stream in one cryogenic bundle.
Isenthalpic Joule-Thomson expansion — the same relation cryogenic JT liquefaction relies on.
Polytropic compression to pipeline/process pressure.
Duty- or outlet-condition-specified energy-balance stage.
Single-stage vapor-liquid equilibrium split at a fixed temperature/pressure.
Stream MCHE approach temperatures and refrigerant compressor discharge from your train's OPC-UA server into this flowsheet's twin comparison — deviations from the solved exchanger duty are flagged automatically.
See the Digital Twin platform →Try it yourself
- ✓Multi-stream enthalpy-based exchanger closure
- ✓Closed propane precool + mixed-refrigerant loops
- ✓The dominant real-world LNG process (APCI C3MR)