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Hydrovar Energy Calculator

Use this tool to approximate energy savings with a Hydrovar Controller compared to a full speed pump.

Following data is to be entered for the calculation:

Step 1 – Select the unit you want to use for pressure

Meter Bar

Step 2 - Enter the common operating conditions

  • Enter up to five common flow rates required by your system,
    starting with the highest flow.
  • For each flow, enter the TDH of a full speed pump at that flow rate.
  • For each flow, enter the percentage of total time the pump runs at this flow.
  • For multi-pump systems, apply the percentage of full capacity to the flow rate of the first pump.
Flow rates cu.m³/h TDH at Max % of total time
   

* Enter data in all boxes.
** Program assumes pumped liquid is water.

Step 3 - Enter the maintained pressure

Bar = Enter the pressure to be maintained in Bar.
Bar = Enter suction pressure if any in Bar.
m³/h =
Eff. =

* Enter data in all boxes.
** Program assumes pumped liquid is water.

Step 4 - Enter the energycosts

Enter your average energy cost per kilowatt hour.
(local currency)

The result of the calculation

Based on the data supplied, a Hydrovar equipped pump will result in the following savings:

For a Hydrovar equipped pump:

Kilowatt Hours per year for full speed pump:  
Cost per year for full speed pump:  
Kilowatt Hours per year for Hydrovar pump:  
Cost per year for Hydrovar pump:  
Annual energy savings with Hydrovar:  

For Multiple Pump Systems Running in Synchronous Mode:

Enter number of pumps in system:  
Annual Hydrovar savings for system:  

Calculation and conversion charts...

Calculation and conversion charts

Conversions

To convert to litres/sec.

IGPM x 0.0757
m³ /hr x 0.278
m³ /min x 16.68
Metric tonnes/hr x 0.278 ÷ S.G.
Litres/min x 0.0167
Kilogrammes/hr x 0.000278 ÷ S.G.
USGPM x 0.063
Cubic feet/sec x 28.3
Cubic feet/min x 0.47
British tons/hr x 0.282 ÷ S.G.
British barrels/hr x 0.453

To convert to m³ /hr

IGPM x 0.273
Litres/sec x 3.60
Litres/min x 0.06
Metric tonnes/hr x 1 ÷ S.G.
m³/min x 60
Kilogrammes/hr x 0.001 ÷ S.G.
Kilogrammes/sec x 3.6 ÷ S.G.
USGPM x 0.227
Cubic feet/sec x 102.0
Cubic feet/min x 0.47
British tons/hr x 1.015 ÷ S.G.
British barrels/hr x 0.163

Pumping Head Conversions

To convert to metres

Feet x 0.305
kg/cm² x 10 ÷ S.G.
PSI x 0.704 ÷ S.G.
Inches Hg x 0.345 ÷ S.G.
cm Hg x 0.1362 ÷ S.G.
Atmospheres x 10.35 ÷ S.G.
KN/m² (KPa) x 0.102 ÷ S.G.
Bar x 10.2 ÷ S.G.

Power Conversions

To convert to kilowatts

Horse power x 0.746

To convert to HP

Kilowatts x 1.341

kW =

m³ / hr x Total head in metres x S.G.
367.87 x Pump Efficiency

BHP =

IMP.GPM x Total head in Ft x S.G. x 10
33,000 x Pump Efficiency