Quality Products & Services Since 1985
 
Energy Savings Analysis
 
To calculate your own operating cost comparison between Pump A and Pump B complete the form below:
 
CONTACT INFO:
First Name

Last Name

Phone Number

Email Address

Company
Comments / Notes:
       
Example Design Conditions:
  • DCOS: 3000 GPM @ 150 TDH
  • Constant speed pump operation
  • Pump A is 86% Efficient at DCOS
  • Pump B is 81% Efficient at DCOS
  • Pump system motor efficiency is set at 95%
  • Power Cost is $.06/KwH
  • Pumping Water with 1.0 Specific Gravity
  • 8000 hours/yr annual pump operation
       
DCOS:
GPM Pump A Efficiency at DCOS:  %
TDH Pump A Brand: (optional)
Pumping Water with Specific Gravity Pump B Efficiency at DCOS:  %
Motor Efficiency  % Pump B Brand: (optional)
Power Cost (example: $.06)  / KwH Annual Pump Operation  hours/year
     
 
  
Brake Horse Power=

GPM x TDH x SG

3960 x Pump Efficiency

 
Pump A

Req. BHP

=

3000 x  150 x 1.0

=

3960 x 86% Pump Eff

         
Pump B

Req. BHP

=

3000 x  150 x 1.0

=

3960 x 81% Pump Eff

Difference in Pump A and Pump B BHP

=

 - )

=

NOTE: Pump B requires 8.2 BHP more than Pump A
     
     
Energy Savings =

BHP diff x .746 Kw/BHP x 8000 hrs/yr

motor efficiency
       
Therefore Energy Savings=  BHP x .746 KW/BHP x   hrs/yr

=

KwH/yr
 % Motor Efficiency
         
Operating Cost Savings =

KwH/yr

x

$ per KwH

=

per year
             
Assuming 20 year pump life, the total operating cost savings for selecting the higher efficiency pump is

=

   
   
For assistance in calculating the cost of pumping and life cyle cost, please call SPE at (800) 890-0935 or email us at sales@southeastpump.com .
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