High Efficiency Motors for Fan Systems

High-efficiency motors are generally 3 to 8 percent more efficient than standard motors. In high-use applications, this efficiency advantage often provides an attractive payback period. However, motors are costly pieces of equipment and their replacement may require justification by other factors. In this regard periods of repair considerations offer a key opportunity. When faced with the decision to repair or replace a motor, several factors must be considered, including motor size, motor type, operating hours, and cost of electricity. Proper assessments may favor the installation of a more efficient motor, rather than repairing the existing one.

Development Status Products
Commercial

High Efficiency Motors for Fan SystemsCosts & Benefits

Parent Process: Fan 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 bas 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  601 6604
Canada 110 1375
EU 425 3986
Thailand 56 569
Vietnam 26 369
brazil 85 952
CO2 Emission Reduction Potential

Total emission reduction potential, as kt CO2/y for different countries are estimated as (UNIDO, 2010): 

US 362
Canada 55
EU 185
Thailand 30
Vietnam 12
brazil 12

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 $35000 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 104.9
Canada 102.9
EU 112.5
Thailand 56
Vietnam 56
brazil 64.6

High Efficiency Motors for Fan Systems Publications

Page Number: 

24, 64-76