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LNG fuel powered ship filling method

A power and fuel technology, applied in the field of LNG fuel powered ship filling, to reduce the required time, save time, and solve the effect of natural gas emissions

Inactive Publication Date: 2021-01-26
CNOOC ENERGY TECH & SERVICES
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The maritime department requires that the discharge of natural gas is prohibited during the filling process, so the recovery of natural gas is a difficult problem to solve when the above-mentioned method is used for filling

Method used

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  • LNG fuel powered ship filling method
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  • LNG fuel powered ship filling method

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Embodiment Construction

[0026] The technology and method of the present invention will be described in detail below in conjunction with the examples and accompanying drawings. The following examples and accompanying drawings are used to illustrate the composition of the present invention, but are not intended to limit the scope of the present invention.

[0027] A filling method for an LNG fuel-powered ship (taking tanker filling as an example), the method uses liquid nitrogen to spray the fuel tank during the pre-cooling process, and the LNG loading condition is reached after the liquid nitrogen pre-cooling is completed, specifically Steps include drying and inerting of fuel tanks, pre-cooling, LNG bunkering, e.g. Figure 4 shown.

[0028] Use dry nitrogen to replace the air in the fuel tank, and simultaneously dry and inert the fuel tank; when the drying and inerting are completed, the oxygen content in the fuel tank is less than 2%, and the dew point is less than -40°C.

[0029] Use liquid nitrog...

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Abstract

The invention discloses an LNG fuel powered ship filling method. The method adopts liquid nitrogen when a fuel cabin is pre-cooled, and specifically comprises the steps that air in the fuel cabin is replaced by using dry nitrogen, and the fuel cabin is simultaneously dried and inerted; the liquid nitrogen is used for spraying the fuel cabin, and pre-cooling of the fuel cabin is conducted; and whenthe average temperature in the fuel cabin is lower than -160 DEG C, LNG loading is started. According to the LNG fuel powered ship filling method, the gas driving step in the LNG filling process is reduced, the LNG consumption is reduced, the time is saved, and the cost is reduced.

Description

technical field [0001] The invention relates to the field of LNG fuel powered ships and assembly, in particular to a fueling method for LNG fuel powered ships. Background technique [0002] With the increasing requirements of the international community for environmental protection, LNG has received widespread attention as a clean energy source. As a ship fuel, LNG has high calorific value, less sulfur and nitrogen content, and can meet the requirements of emission control areas in various countries without emission reduction measures after combustion. Before each new LNG-fueled ship is completed and delivered, it needs to load a certain amount of liquefied natural gas, and conduct a series of tests under the designed temperature conditions to verify the performance of various systems and equipment on board. With the promotion of LNG fuel powered ships, LNG fuel filling is very important. [0003] At present, domestic LNG receiving stations do not provide bunkering service...

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Application Information

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IPC IPC(8): F17C5/02
CPCF17C5/02F17C2221/033F17C2227/0192F17C2227/0341F17C2227/04F17C2250/0439F17C2260/02F17C2260/032F17C2265/061F17C2270/0105
Inventor 朱永凯黄国良时光志韩宇梁斌张荣郑坤张海涛王瑛周毅孙冰
Owner CNOOC ENERGY TECH & SERVICES
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