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http://dx.doi.org/10.7837/kosomes.2019.25.5.609

Antifouling Effect of an Ultrasonic System Operating at Different Frequencies  

Bae, Jin-Woo (Korea Institute of Maritime and Fisheries Technology)
Park, Guan-Sik (KSA system)
Ru, Myung-Lok (Korea Maritime and Ocean University)
Park, Goun-Ha (Korea Maritime and Ocean University)
Publication Information
Journal of the Korean Society of Marine Environment & Safety / v.25, no.5, 2019 , pp. 609-616 More about this Journal
Abstract
When the fouling of a vessel occurs, its resistance at sea increases and there is a corresponding increase in fuel consumption. The maintenance cost of the vessel also increases because it is time-consuming to remove the fouling. To solve this problem and minimize environmental contamination of sea-water, there have been recent developments in anti-fouling paints as self-polishing copolymers that not include toxic elements such as tin. When these conventional techniques are applied to vessels, polishing is promoted during the operation whereby friction or vibration with seawater occurs. This leads to enhanced anti-fouling performance. However, when fouling is intensified such as during an anchorage, there is no flow of seawater and polishing is suppressed. This leads to a deterioration of the performance of anti-fouling. To solve these problems, we developed a system that induces vibration in a vessel during anchorage. As such, the deterioration of polishing due to insuf icient flow of seawater is inhibited. The reliability of the ultrasonic antifouling system was evaluated by calculating its repeatability. The removal efficiency of fouling of the proposed system was qualitatively evaluated using test specimens. The test revealed that the value of the coefficient of variation for the reproducibility of the frequency and amplitude was 0.2 % and 4.0 % on average. The degree of fouling of the specimens was the highest at 73.3 g in the No.5 sepcimen. Moreover, efficiency of fouling removal was 93.2 % on average compared to the specimens without the proposed system.
Keywords
Fouling; Fuel consumption; Self polishing copolymer; Ultrasonic Antifouling System; Removal efficiency of fouling;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
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