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Double-Suction vs End-Suction — 10-Year TCO Estimator
This is a Silver-tier qualified framework, not a vendor guarantee. It decomposes the 20–30% TCO advantage into three measurable factors: BEP efficiency delta, overhaul-service hours, and bearing service interval. Your selection engineer refines the numbers against your tariff and duty cycle.
10-Year TCO Advantage — QS Double-Suction vs Single-Suction End-Suction
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Energy savings (USD over 10 yrs)
3–5% BEP efficiency delta
3–5% BEP efficiency delta
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Labor savings on overhauls (USD)
60–80% fewer service hours
60–80% fewer service hours
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Bearing-driven service interval gain
qualitative — balanced axial thrust
qualitative — balanced axial thrust
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Estimated 10-year TCO delta
| Factor | Formula | Source basis |
|---|---|---|
| Energy | kW × hrs × tariff × (3–5%) × 10 | BEP efficiency delta — Teffiko / HI 40.6 |
| Labor | overhauls × svc hrs × labor × (60–80%) | Top-cover access — Pumps & Systems (Elsey 2016) |
| Bearing | qualitative — fewer thrust-induced wear events | Balanced axial thrust — HI 20.3 §4.5 |
Estimates use mid-range values (4% efficiency delta; 70% overhaul-hour saving). Actual savings depend on duty cycle, tariff escalation, labor cost drift, and your pump’s deviation from BEP. Share your curve and we return an engineer-refined model.
