To provide a technique for highly accurately predicting the gasification rate of a liquefied gas sprayed into a cargo tank of a liquefied gas transportation vessel.SOLUTION: In a liquefied gas transportation vessel that has a cargo tank for storing a liquefied gas and a spray device configured to spray the liquefied gas into the cargo tank, and uses a gas generated by gasifying the liquefied gas as propelling fuel, when a spray gasification rate indicating the ratio of a gas flowrate gasified in the cargo tank to a spray flowrate of the liquefied gas is calculated on the basis of evaporation quality in the cargo tank, a coefficient by which the evaporation quality is to be multiplied is calculated on the basis of actual measurement data in the liquefied gas transportation vessel in advance, and a spray gasification rate during sailing on an optional date is predicted on the basis of a value obtained by multiplying evaporation quality on the optional date by the coefficient.SELECTED DRAWING: Figure 1
【課題】液化ガス運搬船のカーゴタンク内にスプレーされる液化ガスの気化率を高精度に予測する技術を提供する。【解決手段】液化ガスを貯留するカーゴタンク、及び、液化ガスをカーゴタンク内に吹き付けるスプレー作業を行うスプレー装置を有し、液化ガスが気化して発生するガスを推進用の燃料とする液化ガス運搬船において、液化ガスのスプレー流量のうちカーゴタンク内で気化するガスの流量の割合を表すスプレー気化率をカーゴタンク内の蒸気クォリティから算出する際に蒸気クォリティに乗算する係数を液化ガス運搬船での実測データに基づいて予め求めておき、航海中の任意の日時のスプレー気化率を、任意の日時における蒸気クォリティに係数を乗じた値で予測する。【選択図】図1
SPRAY GASIFICATION RATE PREDICTION METHOD AND DEVICE AND OPERATION ASSISTANCE METHOD AND SYSTEM FOR LIQUEFIED GAS TRANSPORTATION VESSEL
スプレー気化率予測方法及び装置、並びに、液化ガス運搬船の運航支援方法及びシステム
2019-03-22
Patent
Elektronische Ressource
Japanisch
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