RENOVATION CASES OF MAGNETIC COUPLING

ENERGY SAVING PERMANENT MAGNETIC COUPLING 

In traditional Motor Pump Systems, whenever the less flow is required, we generally throttle valve, which in-turn increases the pressure in the overall pump system & it also increases the vibration in the system. No Energy can be saved through Conventional couplings.

Whereas, In Motor Pump Systems with PMCs, whenever the less flow is required, we just need to increase the gap between metal plate and magnet plate. It’ll reduce the RPM on the load side as well as reduce the flow. Due to increase in gap, the load on the motor side will decrease & will also result in current-drop of the motor system. That is how PMC saves Energy. 

Following graphs showing the difference between traditional pump systems and pump systems with PMC, in terms of energy savings:

Pump system Permanent Magnetic CouplingEnergy Saving Permanent Magnetic Coupling

 

RENOVATION CASE 1

Cooling pump in Plastic Chemical Plant (Taiwan)

Two Pumps for use and two for reserve

  • Motor : 75KW * 380V * 4P
  • Speed (RPM) decreased : 13%
  • Energy Saving Rate : 14%
  • Electricity cost saved : $14,420/year  

 

 

Cooling Pump in Plastic Chemical Plant

RENOVATION CASE 2

Closed Cooling Water Pump in Thermal Power Plant (SPIC)

  • Motor : 132KW * 0.38KV * 4P
  • Energy Saving Rate : 25%
  • Electricity cost Saved : $ 16,695/year

 

 

cooling Water Pump in Thermal Power Plant

 

CURRENT (A)

SPEED (RPM)

RUNNING HOURS PER YEAR (HR)

TOTAL ELECTRICITY USED(10,000 KWH)

BEFORE UPGRADING

180

1480

8200

77.7

AFTER UPGRADING

134

1333

8200

57.8

RENOVATION CASE 3

PMC- Adjusting Type  Domestic Water Pump Station in Steel Plant (Automatic Speed Adjusting type used for improvement)

Four pump sets, two for use and two for reserve, One pump is controlled by ABB frequency-variable drive.

  • Motor : 260KW
  • Voltage : 380V
  • Speed decreased: 21% 
  • Energy Saving Rate : 49%

 

Domestic Water Pump

 

POWER (KW)

CURRENT (A)

SPEED (RPM)

MOTOR EFFICIENCY (%)

POWER FACTOR (COS Φ)

DAILY SHUTDOWN TIME (HR)

WORKING DAYS PER MONTH

TOTAL ELECTRICITY USED (10,000KWH)

ADJUSTMENT BY VALVE OPENING DEGREE

225.8

410

1479

93

0.9

24

30

185.16

ADJUSTMENT BY PMC-A

113.9

200

1167

93

0.9

24

30

93.4

RENOVATION CASE 4

Cooling Water Pump in Petrochemical Plant

  • Motor : 1300 KW * 3.3KV
  • Energy Saving Rate : 10%
  • Electricity cost Saved : $ 78,443/year
Cooling Water Pump in Petrochemical Plant

 

CURRENT (A)

SPEED (RPM)

RUNNING HOURS PER YEAR (HR)

TOTAL ELECTRICITY USED (10,000KWH)

BEFORE UPGRADING

246.7

710

8200

925

AFTER UPGRADING

222

675

8200

832