Bog priority power generation control method and system for lng powered ship

Abstract

The invention discloses a BOG preferential power generation control method and system of an LNG power driving vessel. According to the technical scheme, the system includes an LNG storage tank and a BOG pipeline connected with the top of the LNG storage tank, the BOG pipeline is connected with a natural gas generator set, and the natural gas generator set supplies power to power distribution equipment of the vessel; the system also includes a master controller, and the master controller is connected with a generator set controller and a vessel load automatic regulator, and a temperature information transmitter, a pressure signal transmitter and a BOG gas supply valve which are located on the BOG pipeline through signals and a control circuit; the generator set controller is connected with a generator gas inlet valve and the natural gas generator set through signals and the control circuit; and the vessel load automatic regulator is connected with the power distribution equipment of the vessel and diesel power generation system through signals and the control circuit. The BOG preferential power generation system of the LNG power driving vessel realizes automatic control and is simple in method, can effectively recycle BOG generated excessively, is high in utilization rate, saves energy and reduces consumption, and is environment-friendly.

Description

technical field [0001] The invention relates to a control method and system for an LNG-powered ship, in particular to a BOG priority power generation control method and system for an LNG-powered ship. Background technique [0002] There are two main sources of BOG in marine LNG fuel installations. One is the self-evaporation generated by the natural heating of the device, the natural heating of the LNG storage tank, and the gasification of the LNG stored in the liquid phase space of the storage tank to produce BOG stored in the gas phase space of the storage tank. The self-evaporating rate of the tank is 5 / 1000 of its LNG storage capacity; the second is the excessive gasification generated during the gas supply process. Due to product specifications and performance limitations, it is difficult to achieve an ideal match between the fuel device and the power device of an LNG-powered ship. The carburetor is configured according to the maximum gas consumption of the main engine ...

AI Technical Summary

Problems solved by technology

This solution is aimed at LNG carriers with multiple LNG storage tanks, so a large number of BOGs can be collected for power generation. After these BOGs are generated, they can fully meet the power consumption dedicated to the ship's position control device, so there is no need to consider BOG interruptions When the supply is insufficient, how to switch between different fuels and how to ensure the priority utilization of BOG

[0004] For inland LNG-powered ships, there is usually only one LNG storage tank, and the output of BOG is limited. Therefore, when the supply of BOG is insufficient or intermittent, how to prioritize the use of BOG and fuel switching to ensure the continuous and stable supply of power

At present, there is no effective solution to the above technical problems in the research field of inland LNG-powered ships.

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