Weather Routing Optimization System for the Purpose of Reducing Fuel Consumption and Navigation Time of Merchant Ships (Aegean Sea Model)

Year 2021, Volume: 24 Issue: 3, 879 - 892, 01.09.2021

Timur İnan , Ahmet Fevzi Baba

https://doi.org/10.2339/politeknik.643333

Abstract

To minimize the voyage time and fuel consumption is a crucial matter for commercial vessels. The components which effect to ship’s speed are wind, wave and sea current direction and magnitudes. In this study, we recommend a weather routing system which gets sea and weather forecasts from Inmarsat and Copernicus services and calculates alternative optimal routes for any voyage in the Aegean Sea. CSGA (Cuckoo Search Genetic Algorithm) is used for calculation. Firstly, the shortest paths between the ports were calculated and stored without considering the sea and weather conditions. After getting the forecasts from Inmarsat and Copernicus services, the cost of the shortest path was calculated and proposed algorithm tried to find a better route to minimize the sailing time and fuel consumption. Because, the Aegean Sea ports are not so far from each other, under calm sea and weather conditions, no better routes than the shortest path routes were found. But, in rough sea and weather conditions in winter, the system could find alternatives way to reduce the sailing time and fuel consumption.

Keywords

CSGA, weather routing, aegean sea, inmarsat, copernicus

Ticari Gemiler İçin Seyir Süresi ve Yakıt Tüketiminin Azaltılması Amaçlı, Hava ve Deniz Şartlarına Göre Rota Optimizasyonu Sistemi (Ege Denizi Örneği)

Abstract

Ticari gemilerin, seyirlerini en kısa zamanda gerçekleştirmesi hem yakıt tasarrufu hem de zaman tasarrufu açısından önem taşımaktadır. Gemilerin hızını etkileyen faktörler rüzgâr, dalga ve akıntı yön ve büyüklükleridir. Bu çalışmada, hava ve deniz şartlarına ait tahmin bilgilerini Inmarsat ve Copernicus servislerinden elde ederek, Ege Denizi üzerinde bulunan limanlar arasında yapılabilecek olası seyirler için rota optimizasyonu sağlayabilen bir karar destek sistemi ortaya koyulmuştur. Ortaya konulan sistem, belirlenen başlangıç ve bitiş limanları arasında kullanılması gereken rotayı, deniz ve hava şartlarına göre en uygun şekilde seçebilmektedir. Uygunluk kriteri, seyir süresinin ve yakıt tüketiminin mümkün olan en az değerde olmasıdır. Hesaplamada yöntem olarak CSGA (Cuckoo Search Genetic Algorithm) algoritması kullanılmıştır. Limanlar arasında seyir yapılabilmesi amacıyla kullanılabilecek en kısa yollar hava ve deniz şartları göz ardı edilerek Djikstra algoritması ile hesaplatılmış ve kayıt altına alınmıştır. Hava ve deniz şartları Inmarsat ve Copernicus servislerinden elde edilerek en kısa yol için maliyet hesaplanmış, ardından da CSGA algoritması ile daha optimal bir rotanın bulunup bulunmadığı hesaplatılmıştır. Ege Denizi limanları arasındaki mesafeler uzun olmadığı için sakin hava şartlarında en kısa yol rotasından daha uygun rota veya rotalar bulunamamıştır. Ancak, hava ve deniz şartlarının sert olduğu kış aylarında, sistemin daha uygun alternatif rotalar bulabildiği gözlemlenmiştir. 

Keywords

: CSGA, Rota Optimizasyonu, Ege Denizi, Inmarsat, Copernicus

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