“Pumping and Hydraulics’ Solutions for Water & Wastewater”
ELECTRIC Pump Data Chart
This chart is suited to electrically driven pumps only and enables the operator to quickly determine pump operating costs in $/ML given operating head (metres), assumed pump efficiency and electricity tariff in c/kWh. The chart is based upon an electric motor efficiency of 93%.
Interestingly, the flow rate pumped is not required for establishing $/ML.
The chart can also be used in reverse to establish volume pumped given pumped head (metres), pump efficiency and known KWH consumption from Electrical Utility invoice.
Rob devised the Pump Data Chart during an investigation into pumping costs for a major irrigation project in the late 1980's.
Download ELECTRIC Pump Data Chart
Interestingly, the flow rate pumped is not required for establishing $/ML.
The chart can also be used in reverse to establish volume pumped given pumped head (metres), pump efficiency and known KWH consumption from Electrical Utility invoice.
Rob devised the Pump Data Chart during an investigation into pumping costs for a major irrigation project in the late 1980's.
Download ELECTRIC Pump Data Chart
Pump Testing Formula
(and Determining kWh/ML/m, bottom of page)
(and Determining kWh/ML/m, bottom of page)
There are 4 basic formulae for testing pumps:
Pump h = WkW (Water kW) .........................1)
MkW (Motor kW)
WkW = 0.00982 x Head(m) x Flow (l/s) .......2) Reference
kWH/KL = EkW ......................................3)
3.6 x l/s
Motor h = MkW ..........................................4)
EkW
From these formulae, we can derive some other useful formulae:
From 4), EkW = MkW .................................................4a)
motor h x drive h
Substitute 4a) into 3)
\kWh/KL = MkW .................................. 5)
motor h x drive h x 3.6 x l/s
From 1) MkW = WkW ..................................................1a)
pump h
Substitute 1a) into 5),
kWh/KL = WkW .......................6)
pump h x motor h drive h x 3.6 x l/s
Substitute 2) into 6)
kWh/KL = 0.00981 x TDH (m) x l/s
pump h x motor h drive h x 3.6 x l/s
Converting to kWh/ML:
kWh/ML = 0.00981 x TDH (m) x l/s x 1000
pump h x motor h drive h x 3.6 x l/s
ie, kWh/ML = 2.724 x TDH (m) ....................................7)
pump h x motor h x drive h
$$/ML = kWh/ML x $$$/KWH
= 2.724 x TDH (m) x $$$ .........8)
pump h x motor h x drive h kWh
NOTE: Formulae 7) and 8) are used to construct the
Pump Data Chart, above
kWh/ML/m formula
from 7)
if kWh/ML= 2.724 x TDH (m)
pump h x motor h x drive h
divide both sides by THD (m)
Then kWh/ML= 2.724 x TDH (m) .
TDH (m) pump h x motor h x drive h x TDH (m)
= 2.724 .
pump h x motor h x drive h
Pump h = WkW (Water kW) .........................1)
MkW (Motor kW)
WkW = 0.00982 x Head(m) x Flow (l/s) .......2) Reference
kWH/KL = EkW ......................................3)
3.6 x l/s
Motor h = MkW ..........................................4)
EkW
From these formulae, we can derive some other useful formulae:
From 4), EkW = MkW .................................................4a)
motor h x drive h
Substitute 4a) into 3)
\kWh/KL = MkW .................................. 5)
motor h x drive h x 3.6 x l/s
From 1) MkW = WkW ..................................................1a)
pump h
Substitute 1a) into 5),
kWh/KL = WkW .......................6)
pump h x motor h drive h x 3.6 x l/s
Substitute 2) into 6)
kWh/KL = 0.00981 x TDH (m) x l/s
pump h x motor h drive h x 3.6 x l/s
Converting to kWh/ML:
kWh/ML = 0.00981 x TDH (m) x l/s x 1000
pump h x motor h drive h x 3.6 x l/s
ie, kWh/ML = 2.724 x TDH (m) ....................................7)
pump h x motor h x drive h
$$/ML = kWh/ML x $$$/KWH
= 2.724 x TDH (m) x $$$ .........8)
pump h x motor h x drive h kWh
NOTE: Formulae 7) and 8) are used to construct the
Pump Data Chart, above
kWh/ML/m formula
from 7)
if kWh/ML= 2.724 x TDH (m)
pump h x motor h x drive h
divide both sides by THD (m)
Then kWh/ML= 2.724 x TDH (m) .
TDH (m) pump h x motor h x drive h x TDH (m)
= 2.724 .
pump h x motor h x drive h
Download DIESEL Pump Data Chart
Formula for kWh/Megalitre
= 2.724* x metres head
motor h x pump h x drive h
= 2.724* x metres head
motor h x pump h x drive h
ABN 92 105 345 506
Tallemenco Pty Ltd, T/A WATER PUMPING INSTITUTE
Windsor Gardens, SOUTH AUSTRALIA, 5087.
ABN: 92 105 345 506
Mobile 0414 492 256
Intn'l: Cell +61 414 492 256
LinkedIn: Robert L Welke
Windsor Gardens, SOUTH AUSTRALIA, 5087.
ABN: 92 105 345 506
Mobile 0414 492 256
Intn'l: Cell +61 414 492 256
LinkedIn: Robert L Welke
Last Update
May 14th, 2024
May 14th, 2024
