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Ship including engine and method for increasing reliquefaction efficiency

A technology for engines and ships, applied in the direction of container discharge methods, ship propulsion, container filling methods, etc., can solve problems such as limited and external heat blocking

Active Publication Date: 2020-07-14
HANWHA MARINE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Even when LNG storage tanks are insulated, there is a limit to the ability to completely block external heat

Method used

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  • Ship including engine and method for increasing reliquefaction efficiency
  • Ship including engine and method for increasing reliquefaction efficiency
  • Ship including engine and method for increasing reliquefaction efficiency

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Embodiment Construction

[0055] Hereinafter, embodiments of the present invention will be explained in detail with reference to the accompanying drawings. A ship including an engine according to the present invention can be applied to various marine systems and land systems. It should be understood that the following examples can be modified in various ways and do not limit the scope of the present invention.

[0056] image 3 is a schematic diagram of a partial reliquefaction system applied to a vessel including a high pressure engine according to one embodiment of the present invention.

[0057] In this embodiment, the boil-off gas discharged from the storage tank 100 will be generally referred to as boil-off gas and means not only boil-off gas in gaseous or vapor phase, but also in gas phase, gas-liquid mixed phase, liquid phase, and supercritical Evaporated gas of the fluid phase (supercritical fluid phase).

[0058] refer to image 3 , the ship according to this embodiment includes: a first s...

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Abstract

A ship comprising an engine is disclosed. The ship comprising an engine comprises: a first self-heat exchanger which heat-exchanges boil-off gas discharged from a storage tank; a multi-stage compressor which compresses, in multi-stages, the boil-off gas that passed through the first self-heat exchanger after being discharged from the storage tank; a first decompressing device which expands one portion of the boil-off gas compressed by the multi-stage compressor; a second self-heat exchanger which heat-exchanges the other portion of the boil-off gas compressed by the multi-stage compressor, with the boil-off gas expanded by the first decompressing device; and a second decompressing device which expands the boil-off gas pre-cooled by the second self-heat exchanger and cooled by the first self-heat exchanger, wherein the first self-heat exchanger uses the boil-off gas discharged from the storage tank as a refrigerant for cooling the boil-off gas that passed through the second self-heat exchanger after being compressed by the multi-stage compressor.

Description

technical field [0001] The present invention relates to a vessel including an engine and a method of increasing the efficiency of reliquefaction, and more particularly to a method in which boil-off gas remaining after being used as fuel in the engine is regenerated using the boil-off gas as a refrigerant. Ships including engines that are liquefied into liquefied natural gas (LNG) and returned to storage tanks. Background technique [0002] Generally, natural gas is liquefied and transported over long distances in the form of liquefied natural gas (LNG). Liquefied natural gas is obtained by cooling natural gas to an extremely low temperature of about -163° C. under atmospheric pressure and is well suited for long-distance offshore transportation because the volume of liquefied natural gas is significantly reduced compared to natural gas in the gas phase. [0003] Even when LNG storage tanks are insulated, there is a limit to the ability to completely block external heat. Th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F17C5/02F17C7/04B63B25/16B63H21/38F02M21/02F02M25/08
CPCF02M21/0209F02M21/0215F02M21/0218F02M21/0221F02M21/0287F17C9/02F17C2221/033F17C2223/0161F17C2223/033F17C2223/043F17C2260/035F17C2265/033F17C2265/036F17C2265/037F17C2265/038F17C2265/066F17C2265/07F17C2270/0105Y02T10/30B63B17/0027B63B25/16B63H21/38F17C5/02F17C7/04
Inventor 李準埰丁海元
Owner HANWHA MARINE CO LTD
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