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Four-stage cascade (≈−190 °C)

Cascade refrigerationClosed loopsCryogenicsNitrogen
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Propylene → ethylene → methane → nitrogen cascade reaching ≈81 K — four coupled closed loops, the full ChemSep cascade ladder (Refrigeration_4-Stage-190C). Air-separation-grade cold from stacked vapor-compression cycles.

The flowsheet

The solved topology — every unit op's real duty, conversion, or split, read straight off a genuine converged solve.

K0
JT0
Cond0
K1
JT1
hot
cold
hot
cold
Q out
CX1
K2
JT2
hot
cold
hot
cold
Q out
CX2
K3
JT3
hot
cold
hot
cold
Q out
CX3
Evap3

The stream table

Every stream's flow, temperature, pressure, and composition — real converged numbers, not placeholders.

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Launch interactive model

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