극해지역 운항 선박의 의장재 방한을 위한 전력 최적화에 관한 연구

Abstract

Economic efficiency via Article routes is drawing keen attention. The melting of ice in Arctic waters due to climate change has opened routes up to ship and to cut travel times between the Atlantic and Pacific Ocean. Shorter shipping routes across the Arctic Ocean would save Korean shipping companies time and money. For example, the journey from Busan to Rotterdam via the Northwest Passage in the Arctic Ocean is 6,857 nautical miles and takes 14 days while the current route from Busan to Rotterdam takes 24 days to navigate 10,853 nautical miles. In 2017, the LNG carrier Christophe de Margerie completed the journey between South Korea to Norway along Russia’s northen coast. It was the first time a ship of the sort had traveled these waters without icebreaker. As sea ice has declined due to global warming, Arctic navigation has increasing possibilities. Once this route is commonly used, it will directly change global maritime transport and have a profound influence on international trade, the world economy and resource exploitation. Many countries have noticed the financial and strategic value of Artic Ocean passages. Korea has also paid much attention. Of course, there are may risks, such as lack of infrastructure and possible damage by ice and unpredictable weather. That’s why we need guidance for ship sailing on the Arctic Ocean. The international Association of Classification Societies and the International Maritime Organization put a lot of effort into unified code for ship to navigate in polar waters by combining various polar class standards and anti-icing techniques. However, such regulations and rules more focused on performance requirements of vessels with icebreaker capability. Therefore, it has received less attention that certification standards for exterior deck materials in extreme conditions while they are directly related to the safety of sailors. In this study, analyzes the limitations of precedent publications related to anti-icing technologies and establishes four following objectives. First, we aim to suggest methods to verify the performance of anti-icing exterior materials. Secondly, we confirm the factors that cause the most significant impact on the design of exterior materials for anti-icing technologies for vessels to navigate through polar waters. Thirdly, we then suggest framework design specifications based on the results of experiments within extreme conditions, and numerical analysis on heat transfer, depending on differing external factors of walk-ways, stair-steps, and handles. Based on the results, we will find and propose the optimal amount of power to prevent anti-icing on Araon and icebreaking LNG ships. Fourthly, we verify the efficacy of the theoretical approach by comparing the results of numerical analysis and the practical experiment for various external environments. The performance verification process involves analyzing the specifications and standards applied to former experiment cases to confirm the issues. In the case of external materials with anti-icing capability, it has been known to be affected significantly by the temperature among external conditions. Through this research, It could be confirmed that wind velocity exerts more impact on the materials than temperature. As a final result, we suggest framework design plans for heated walk-ways, stair-steps, and handles so that they could maintain the anti-icing temperature using the heat source that consumes the least electricity. They are derived from numerous experiment processes with differing external conditions and analysis.