Liquid-transfer pumping · performance scenario
Liquid-transfer pump · DEMO comparison
Not an Equipment record, live pump fleet or confirmed Channel pump specification. No speed setting is sent to equipment. Changes are browser-only and are not written into the energy inventory or savings ledger.
Illustrative pump–system intersection
- Assumed pump curve
- Assumed local system curve
No compressor surge line, fabricated measured spectrum or generic vibration alarm is used. This local system curve is not a calibrated model of the 170 km pipeline.
Energy comparison, not verified savings
No capital cost, emissions factor, carbon benefit or payback is assumed. Do not add this single-pump illustration to the separate terminal/pipeline energy inventory. Before booking savings, the energy lead and independent finance reviewer should reconcile metered electrical demand at comparable product, rate, head and operating hours.
Evidence required · OEM duty envelope
Confirm the actual tag, certified head/efficiency curves, impeller diameter, permitted speed range, minimum continuous flow and bearing requirements.
Evidence required · Cavitation and suction
Measure suction absolute pressure, temperature, vapour pressure and level; compare NPSHa with the OEM NPSHr plus the approved margin. No NPSH result is implied here.
Evidence required · Condition and redundancy
Obtain calibrated vibration spectra, bearing temperature, seal leakage and actual duty/standby availability. A generic vibration number is not a site limit or a root-cause diagnosis.
Evidence required · Release and verification
An accountable engineer must approve any speed or duty change after hydraulic/surge and protection review. Verify flow, differential head, real electrical kW, vibration, seal condition and suction performance against approved criteria at the agreed duty; retain calibrated baseline and post-work records.
Exposed curve and cost assumptions
With Q in m³/h, head H in metres and relative speed r: Hp = 700r² − 0.00125Q²; Hs = 150 + 0.0021875Q². The 700 m shut-off head, 150 m static head and both resistance coefficients are invented DEMO constants, not OEM or site data. Intersection solves Hp = Hs. Defaults are 100% speed, 800 kg/m³ density, 70% current / 78% comparison overall efficiency, 8,000 hours/year and NZ$0.18/kWh.
Electrical kW = ρ × 9.81 × (Q/3,600) × H ÷ (1,000 × efficiency). Annual cost = kW × hours × NZ$/kWh. Efficiency is assumed constant at each comparison duty; no affinity-law efficiency guarantee, NPSH check, minimum-flow check or transient solution is provided. The speed range shown is a UI scenario range, not a permissible machine range.