Scale Removal from Components

Ionic constituents of the fluid can over time deposit on the surfaces of components such as heat exchangers and strainers in solid form, particulary under high pressure and temperature. Such scale formation will cause extra pressure drop in the system, thereby increasing energy demand. With the use of anti-scaling and anti-fouling agents, and if necessary by mechanically removing excessive scale formation, the energy efficiency can be reduced. Reduced scale on equipment may also provide additional energy saving and productivity benefits – for example by improving heat exchange. Scale removal should therefore be a part of the facility's maintenance program.

Development Status Products
Commercial

Scale Removal from ComponentsCosts & Benefits

Parent Process: Pump Systems
Energy Savings Potential

This measure is estimated to offer following improvement potentials (UNIDO, 2010):
• 10% for low efficiency base cases;
• 5% for medium efficiency base cases;
• 2% for high efficiency base cases;

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

  Final*
(GWh/y)
Primary*
(TJ/y
)
US 1721 18891
Canada 513 6395
EU 1235 11602
Thailand 151 1523
Vietnam 89 1263
brazil 146 1629
CO2 Emission Reduction Potential

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

US 1037
Canada 255
EU 538
Thailand 1444
Vietnam 829
brazil 669

Costs

Estimated typical capital costs of this measure for different system sizes (S) are:
• US $6000  for S < 37 kW;
• US $6000 for 37 kW < S < 75 kW;
• US $9000 for 75 kW < S < 150 kW;
• US $12000 for 150 kW < S < 375 kW;
• US $15000 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 330.9
Canada 320.3
EU 383.7
Thailand 69.1
Vietnam 43.3
brazil 128.5

Scale Removal from Components Publications

Page Number: 

39-48