Size Replacement Compressor to Meet Demand

In most plants the demand profile will change over time, requiring more or less compressed air. Such change can reach a level where meeting the newly established demand with the existing system will be highly inefficient. In such cases, replacing the compressors with new one that having better suited capacities will offer efficiency gains. Purchasing of new compressors is often a costly exercise, but such replacement may prove to economically advantageous with a life cycle costing perspective.

Development Status Products

Size Replacement Compressor to Meet DemandCosts & Benefits

Parent Process: Compressed Air Systems
Energy Savings Potential

This measure is estimated to offer following improvement potentials:
• 18% for low efficiency base cases;
• 13% for medium efficiency base cases;
• 9% 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 1704 18709
Canada 450 5604
EU 1491 14011
Thailand 196 1967
Vietnam 88 1256
brazil 301 3367
CO2 Emission Reduction Potential

Total emisson reduction potential, as kt CO2/y for different countries are estimated as (UNIDO, 2010): 
US 1027

Canada 224
EU 650
Thailand 102
Vietnam 43
brazil 44


Estimated typical capital costs of this measure for different system sizes (S) are:
• US $12000  for S < 37 kW;
• US $25000 for 37 kW < S < 75 kW;
• US $40000 for 75 kW < S < 150 kW;
• US $70000 for 150 kW < S < 375 kW;
• US $120000 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 212.7
Canada 219.8
EU 238.8
Thailand 155.5
Vietnam 153.9
brazil 154.4

Parent Process:
Energy Savings Potential
CO2 Emission Reduction Potential



Size Replacement Compressor to Meet Demand Publications

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Size Replacement Compressor to Meet Demand Case Studies