References
Letter of reference from Jonathan Mahon - Manager, Maintenance Utilities, Arcellor Mittal
"j&w® Cleaning services have cleaned an air cooled condenser on our 30MW Steam Turbine on 3 seperate occasions.
Their method of cleaning is effective and dirt and some of the scale build up is removed right through the finned tube bundle. An immediate improvement in the cooling efficiency can be seen even after the cleaning of one cooler battery.
The equipment they use is well constructed and carefully engineered. The temporary installation was professionally performed. The high pressure water jets were always kept perpendicular to the fins and no fin damage was evident after the cleaning.
The site was keft clean and tidy after completion of the job."
Click here to download the original letter.
Internal Cleaning
Case Study: Power Plant, Germany
320 MW Turbine, Block C
2 x condensers
13.690 tubes
Internal diameter: 21mm
Length: 9400mm
1x feed water condensator with 4.620 tubes
After the cleaning with the cleaners a company for non-destructive testing did an examination of the tubes with an endoscope. This company announced, it would be very rare to see such a good quality like in these cleaned tubes.
Results
After return to operation the following improvement in performance could be measured:
- Delta T before cleaning: 7,0
- After cleaning: 2,7 (dT)
- Before cleaning: p = 60 - 65 mbar
- After cleaning: p = 44,4 mbar
6 MW x 45 Euro/MWh x 24 h x 365 days x 75% = ~ 13,500,000.00 ZAR/year
External Cleaning
Case Study: Phosphate Industry, Morocco
Graphite Heat Exchanger Moduls in the Phosphate Industry, Morocco
Without water drilling it was not possible to remove the fouling.
