High Efficiency Motors in Pump Systems

As discussed elsewhere, energy efficiency of the pumping system can be improved by the use of high-efficiency electric motors. Electrical motors are expensive pieces of equipment and as compared to most other measures, the impact of the higher efficiency motor on the overall system efficiency may be relatively small. Consequently, it may be more feasible to replace the motor during a major system change or when the motor needs replacing due to other reasons.

Development Status Products
Commercial

High Efficiency Motors in Pump SystemsCosts & Benefits

Parent Process: Pump Systems
Energy Savings Potential

This measure is estimated to offer following improvement potentials (UNIDO, 2010):
• 5% for low efficiency base cases;
• 3% for medium efficiency base cases;
• 1% for high efficiency base cases;

Electrical and primary energy savings potential of this technology for different countries is estimated as following (UNIDO, 2010): 

  Final* (GWh/y) Primary* (TJ/y)
US 1574 17283
Canada 470 5851
EU 1130 10615
Thailand 77 779
Vietnam 36 522
brazil 10 44066

 

CO2 Emission Reduction Potential

Total emission reduction potential of installing more efficient motors for different countries are estimated as following (values in kt CO2/y) (UNIDO, 2010): 

US 948
Canada 233
EU 492
Thailand 40
Vietnam 18
brazil 16

Costs

Estimated typical capital costs of this measure for different system sizes (S) are:
• US $2200  for S < 37 kW;
• US $4500 for 37 kW < S < 75 kW;
• US $8000 for 75 kW < S < 150 kW;
• US $21000 for 150 kW < S < 375 kW;
• US $37500 for 375 kW < S < 745 kW; (UNIDO, 2010)

Cost of conserved energy, expressed as US $/MWh-saved, in different countries are estimated as following (UNIDO, 2010):

US 116.9
Canada 116.2
EU 115
Thailand 107.3
Vietnam 81.4
brazil 109.4

High Efficiency Motors in Pump Systems Publications

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21-48