DNS-100^™ Fuel Polishing and Scrubbing Technology

ROI Analysis

A gas turbine’s suggested lifespan is affected not only by the quality of the fuel, but also the operational load, temperature, time in service, etc.

In a study regarding the quality of the bunkered fuel for one shipping company, we used over 1450 different test results for bunkered fuel from December 2009 to March 2011. None of the fuel samples were in compliance with the fuel specification provided by the gas turbine manufacturers. The lowest level of only Natrium was measured at 2 ppm in 7 cases. 99% of all tested samples contained more than 5 ppm alkaline metals.

The study shows that the amount of contamination was always significantly outside the tolerance threshold for gas turbine engines. The presence of high amounts of contamination will not only void the manufacturer’s warranty but also may have greater effect on the corrosion of the hot section. While the lifespan of a new engine is reduced by 50%, from 25000 hrs to 12500 hrs at 0.2 ppm contamination, the effect of contaminations over 2ppm is even greater, particularly for an engine that has already been in service for 10000 hrs. In some cases the sulfidation process causes grave inter-granular pitting of hot section within hours of operation, requiring costly repairs.

Installation of DNS-100 inline fuel scrubbing/polishing system provides an unmatched return on investment within months of installation and generates additional profit thereafter.

The picture shows the inter-granular pitting damage on the hot section