Application Case Study

Title : -

Energy saving in Brine Pump

Application : -

Brine Pump

Motor rating : -

AC Induction Motor, 3-Phase

kW   : 90
Volt   : 415
RPM : 1480
Hz    : 50
Amp : 146

Previous system : -

Motor was running on Star Delta Starter.

Problem Observed : -

High maintenance cost. Energy losses due to flow control by valve

Present System : -

Hitachi 90 kW, VFD used in place of Normal Star Delta Starter.

Previous system (Without drive): -

kW (Consumption) - 40kW; Valve Position - 60 % open

Present system (With drive) : -

kW (Consumption) - 27kW; Valve Position - 100 % open

Merits of new system : -

. Easy & smooth operation. Energy saving due to flow control by VFD.

Economical analysis : -

  • Energy consumption without VFD = 40 kW
  • Energy consumption with VFD = 27 kW
  • Energy saving per day ((P1 - P2) * 20) = 260 Units.
  • Saving per day @ Rs. 8.5/- Unit = Rs.2210 /-
  • Saving per year (Approx. 300 Days) = Rs.6,63,600 /-
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