高精度気象・海象予測データに基づく内航船の省エネルギー運航について

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タイトル別名
  • Energy Saving Operation for Coastal Ships Based on Precise Environmental Forecast
  • コウセイド キショウ カイショウ ヨソク データ ニ モトズク ナイコウセン ノ ショウエネルギー ウンコウ ニ ツイテ

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Ships have an advantage of economical and ecological transportation, but they are strongly affected by marine environments such as winds, waves, currents, and it is difficult for them to keep the operation schedule. Actually, coastal ships have been operated with considerably high engine power to avoid the delay of arrival, and often have to wait for a long time outside the destination port. If this waiting time outside the destination port can be used for the passage time, the engine power during the voyage can be largely reduced, which leads to a large amount of fuel saving and reduction of CO_2 emission. In this study, based on the precise environmental forecast and the ship's speed and engine performance in waves, the authors have developed two methods to minimize the fuel during the voyage with keeping operation schedule. Backward Dynamic Programming and Forward Dynamic Programming were used to calculate the minimum fuel route. A coastal Ro/Ro ship plying between Tokyo and Tomakomai/Kushiro in Hokkaido was used as a model ship in this study. Comparing the fuel consumption on the minimum fuel route calculated by these two methods with that on the actual route by simulations, the effectiveness of the proposed methods for energy saving operation was investigated.

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