Decarbonization›CO₂ Compression Power
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CO₂ Compression Power & Stages

Decarbonization · Polytropic head · Multi-stage with intercooling

CO₂ Compression Power & Stages
Multi-stage CO₂ compression with intercooling, screening-level estimate per GPSA / ASME PTC-10 polytropic head method. Sizes the train from low-pressure capture (1.5–2 bara) to dense-phase pipeline conditions (150–200 bara), with stage-by-stage power and cooling duty.

Service Conditions

kg/h
bara
bara
°C

Intercooling & Efficiency

°C
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📚 Learn the Theory

Multi-stage CO₂ compression: Schultz polytropic head, intercooling, the gas-to-liquid pumping transition near the critical point, and DOE NETL benchmarks.

Read Engineering Guide →

Engineering Basis

  • Per-stage polytropic head: H_p = Z·(R/MW)·T·n/(n-1)·[PR^((n-1)/n) − 1] (Schultz / GPSA §13).
  • Stages picked so PR/stage ≤ user limit (default 3.0 — typical for centrifugal CO₂ service).
  • k = 1.30 for CO₂ at moderate pressure; Z piecewise (0.95 / 0.75 / 0.60) — for final design use REFPROP at each stage condition.
  • Intercoolers between stages bring CO₂ back to user-specified outlet T (default 40 °C).
  • Final stages above Pc with cool feed are flagged as pump regime — those are typically centrifugal CO₂ pumps in real designs.
  • Standards: GPSA §13, ASME PTC-10, ISO 27913:2016, API STD 617, DOE NETL Cost & Performance Baseline.
  • Typical specific energy: 80–130 kWh/t for 1.5 → 150 bara CCUS service (DOE NETL).

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