Compressor Performance: liquid_ring_compressor
Centrifugal, reciprocating, and rotary screw compressor typical performance envelopes — polytropic and adiabatic efficiency, head per stage, pressure ratio, speed range, and turndown by compressor type and flow range
| compressor type | flow range | adiabatic efficiency pct (%) | flow max acfm (acfm) | flow min acfm (acfm) | head per stage ft (ft) | notes | polytropic efficiency pct (%) | pressure ratio per stage max (dimensionless) | pressure ratio per stage min (dimensionless) | speed rpm max (rpm) | speed rpm min (rpm) | turndown pct (%) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| liquid_ring_compressor | medium | 38 | 5,000 | 500 | 0 | Medium liquid ring: 500-5000 acfm; two-stage versions achieve PR up to ~5:1 with inter-stage liquid injection; common in pulp/paper vacuum service and chemical plant gas handling; efficiency 35-42%; seal liquid recirculation required | 0 | 2.2 | 1.1 | 1,200 | 600 | 80 |
| liquid_ring_compressor | small | 35 | 500 | 10 | 0 | Liquid ring (Nash) compressor/vacuum pump: rotary positive displacement using liquid ring; seal liquid (water/glycol) handles condensables and liquid slugs; low adiabatic efficiency 30-40% - ring friction losses significant; pressure ratio limited to ~2.5:1 single stage; tolerates dirty/wet gas; turndown via throttling to ~80% of rated flow | 0 | 2.5 | 1.1 | 1,800 | 900 | 80 |
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