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Three-stage cascade (−150 °C)

Cascade refrigerationClosed loopsCryogenics
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Propylene → ethylene → methane cascade to −150 °C: each colder loop condenses against the next-warmer loop’s evaporator. From the ChemSep casebook (Refrigeration_3-Stage-150C).

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
Evap2

The stream table

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

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