VESSEL, LIQUEFIED GAS VAPORIZATION DEVICE, AND CONTROL METHOD THEREFOR AS WELL AS IMPROVEMENT METHOD THEREFOR

摘要

Provided are: a vessel equipped with a liquefied gas vaporization device capable of flow rate control or temperature control with good precision even when the range of flow rates is broad; a liquefied gas vaporization device; and a control method therefor as well as an improvement method therefor. The vessel is provided with: a secondary pipe (13), which branches off and bypasses the main pipe (5) and is provided so as to rejoin the main pipe (5), and through which LNG of a lower flow rate than the main pipe (5) flows; a switching valve (15) for switching between the main pipe (5) and the secondary pipe (13); a liquid flow meter (17) that measures the flow rate of the LNG flowing through the secondary pie (13); and a pressure-reducing valve (19) that reduces the pressure of the LNG flowing through the secondary pipe (13). When the main pipe (5) is selected by the switching valve (15), the flow rate-adjusting valve (6) is controlled on the basis of the value measured by a gas flow meter (8) and when the secondary pipe (13) is selected by the switching valve (15), the flow rate-adjusting valve (6) is controlled on the basis of the value measured by the liquid flow meter (17).