POWER SAVINGBY ROCKSOLID INDUSTRIAL SOLUTIONS

SYSTEMS REQUIRING PUMPSUSING VALVE CONTROL

SYSTEMS REQUIRING FANSUSING DAMPER CONTROL

SAVE GOOD $MONEY$POWER SAVINGS USING VFD'S

VARIABLE FREQUENCY DRIVES

Pump Curve

PUMP MOTOR DATA125 HP MOTOR

1750 RPM87.5 EFFICENCY

OPERATING 16 HOURS PER DAY365 DAYS PER YEAR

DISCHARGE VALVE 30% CLOSED800 GPM

450 FEET OF HEADUSAGE 110 HP~

.

Date Read kwh Amount2/2/2012 21613 60100 $4,932.071/4/2012 21112 46300 $4,770.4112/2/2011 20649 45600 $4,606.67 $48,243.81 12 month11/2/2011 20193 45300 $4,581.1010/4/2011 19740 43900 $4,595.979/2/2011 19301 51900 $5,141.338/2/2011 18782 38200 $4,197.857/5/2011 18400 17800 $2,874.676/2/2011 18222 300 $ 760.005/4/2011 18219 29200 $3,566.974/4/2011 17927 43000 $4,383.473/3/2011 17497 40000 $4,148.992/2/2011 17097 49800 $4,745.271/4/2011 16599 48700 $4,641.5212/2/2010 16112 48900 $4,743.5211/2/2010 15623 48300 $4,882.7810/4/2010 15140 75300 $6,211.358/19/2010 14387 51200 $4,734.977/21/2010 13875 46600 $4,480.616/17/2010 13409 10200 $2,239.805/20/2010 13307 41500 $3,977.734/21/2010 12892 32300 $3,513.453/18/2010 12569 41000 $3,823.222/19/2010 12159 50500 $4,090.54

Typical power bill for pumping

station

Please note twelve month avarage.

DO A SAMPLE FOR YOUR APPLACATION.

CLICK TO RUN APPLACATION. THE SPREADSHEET IS MADE FOR A PUMP RUNNING WITH A DISCHARGE VALVE THROTTLED CLOSED TO 70% FLOW.

BASED ON THIS CAN WE SAVE YOU $MONEY$

Step 9. Add cost of VFD to Installation Cost$24,140.00 VFD Cost $18,000.00 Install Cost $42,140.00 Total CostStep 10. Divide total cost by annual savings= return on investment in years$42,140.00 Cost/Savings $20,932.78 2.01 ROI in years

In the example ROI has been calculated with one pump in operation, the cost of two 125 HP VFD units and Installation (the second is for the standby pump).