PROBLEM TO BE SOLVED: To surely keep a pressure of fuel gas supplied to an auxiliary gas engine within an allowable range.SOLUTION: A ship comprises: a compressor including a main flow passage, upstream side compression mechanisms, upstream side circulation passages, and upstream side bypass valves; an air feed line introducing BOG (Boil Off Gas), which is generated in a tank storing LNG, to the compressor; a first supply line introducing the BOG from the compressor to a main gas engine for propulsion; an extraction line that introduces extracted gas from the compressor to a header and is provided with an extraction valve; an auxiliary gas engine for an inboard power supply connected to a header through a second supply line; and a control device that controls the extraction valve so that a pressure in the header detected by a header pressure gauge becomes a target pressure, and while controlling the upstream side bypass valves by feedback control so that discharge pressures of the upstream side compression mechanisms detected by compression mechanism pressure gauges become target pressures, and controls the upstream side bypass valves prior to the feedback control on the basis of an opening degree of the extraction valve.SELECTED DRAWING: Figure 1
【課題】副ガスエンジンへ供給される燃料ガスの圧力を確実に許容範囲内に保つことができるようにする。【解決手段】船舶は、主流路、上流側圧縮機構、上流側循環路および上流側バイパス弁を含む圧縮機と、LNGを貯留するタンク内で発生するBOGを圧縮機へ導く送気ラインと、圧縮機から推進用の主ガスエンジンへBOGを導く第1供給ラインと、圧縮機からヘッダーへ抽出ガスを導く、抽出弁が設けられた抽出ラインと、ヘッダーと第2供給ラインにより接続された、船内電源用の副ガスエンジンと、ヘッダー圧力計で検出されるヘッダー内の圧力が目標圧力となるように抽出弁を制御し、かつ、圧縮機構圧力計で検出される上流側圧縮機構の吐出圧が目標圧力となるようにフィードバック制御により上流側バイバス弁を制御しつつ、抽出弁の開度に基づいてフィードバック制御に先行して上流側バイパス弁を制御する制御装置と、を備える。【選択図】図1
SHIP
船舶
2018-07-05
Patent
Elektronische Ressource
Japanisch
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