PO.ESP.Stages
Description
Calculates required number of pump stages (rounded up), [stages].
Syntax
=PO.ESP.Stages(TDH, head_per_stage)Parameters
| Parameter | Description |
|---|---|
| TDH | Total Dynamic Head required, [ft]. |
| head_per_stage | Head per stage at design rate, [ft/stage]. |
SI Unit Version
Lambda Name
PO.ESP.Stages.SIFormula
=LAMBDA(TDH, head_per_stage, LET(
TDH_ft, PO.UnitConverter(TDH, "m", "ft"),
head_per_stage_ft, PO.UnitConverter(head_per_stage, "m", "ft"),
PO.ESP.Stages(TDH_ft, head_per_stage_ft)))SI Parameters
| Parameter | Unit | Description |
|---|---|---|
TDH |
m | Total Dynamic Head required, [m] |
head_per_stage |
m | Head per stage at design rate, [m] |
How to save as a reusable Excel function
LAMBDA is a built-in Excel feature (Microsoft 365) that lets you create custom functions without VBA. The formula above works as-is when pasted into a cell.
To save a LAMBDA as a reusable named function:
- Go to Formulas → Name Manager → New
- Enter a name, e.g.
PO.ESP.Stages.SI - In Refers to, paste the LAMBDA formula without the trailing invocation
(...) - Click OK
Now use =PO.ESP.Stages.SI(...) anywhere in your workbook.