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Non-explosive mixed refrigerant for re-liquefying device in system for supplying fuel to high-pressure natural gas injection engine

A mixed refrigerant and fuel supply system technology, which is applied to fuel heat treatment devices, engine control, oil supply devices, etc., can solve the problems of complex device configuration and low efficiency, reduce thermal stress, reduce heat load, and safely recycle The effect of liquefaction

Inactive Publication Date: 2014-01-29
DAEWOO SHIPBUILDING & MARINE ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Nitrogen inverse Brayton cycle for offshore LNG liquefaction plants is relatively simple in terms of plant configuration and thus beneficial for constrained ships or offshore installations, but is inefficient
The mixed refrigerant Joule-Thomson refrigeration cycle used in onshore LNG liquefaction equipment has relatively high efficiency, but the device configuration is complicated because it needs to be used to separate the mixed refrigerant when the characteristics of the mixed refrigerant cause the coexistence of gaseous and liquid states the separator

Method used

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  • Non-explosive mixed refrigerant for re-liquefying device in system for supplying fuel to high-pressure natural gas injection engine
  • Non-explosive mixed refrigerant for re-liquefying device in system for supplying fuel to high-pressure natural gas injection engine
  • Non-explosive mixed refrigerant for re-liquefying device in system for supplying fuel to high-pressure natural gas injection engine

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Embodiment Construction

[0038] Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings. However, this invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art.

[0039] The International Maritime Organization (IMO) stipulates that nitrogen oxides (NOx) in ship exhaust gas X ) and sulfur oxides (SO X ) emissions, and also attempts to regulate carbon dioxide (CO 2 ) emissions. Specifically, regarding nitrogen oxides (NO X ) and sulfur oxides (SO X ) The subject of the regulations was raised in the 1997 International Convention on the Prevention of Marine Pollution from Ships (MARPOL). Eight years later, the agreement met the implementation requirements and entered into force in May 2005. Cu...

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Abstract

Provided is a nonflammable mixed refrigerant for use in a reliquefaction apparatus of a fuel supply system that compresses BOG generated in an LNG storage tank to a medium pressure, reliquefies the compressed BOG, compresses the reliquefied BOG to a high pressure, gasifies the compressed requefied BOG, and supplies the gasified BOG to a high-pressure natural gas injection engine. A nonflammable mixed refrigerant for use in a fuel supply system for a high-pressure natural gas injection engine is provided. The fuel supply system includes BOG compression unit configured to receive and compress BOG generated in a storage tank storing liquefied gas, a reliquefaction apparatus configured to receive and liquefy the BOG compressed by the BOG compression unit, a high-pressure pump configured to compress the liquefied BOG generated by the reliquefaction apparatus, and a high-pressure gasifier configured to gasify the liquefied BOG compressed by the high-pressure pump and supply the gasified BOG to the high-pressure natural gas injection engine. The nonflammable mixed refrigerant cools the BOG by heat exchange with the BOG in the reliquefaction apparatus. The nonflammable mixed refrigerant comprises a mixture of nonflammable refrigerants with different boiling points, and the boiling point of each of the nonflammable refrigerant ranges between a room temperature and a liquefaction temperature of natural gas.

Description

technical field [0001] The present invention relates to a nonflammable mixed refrigerant for use in a reliquefaction apparatus for a fuel supply system to be produced in a liquefied natural gas (LNG) storage tank Compress the boil-off gas (BOG) to medium pressure, reliquefy the compressed BOG, compress the reliquefied BOG to high pressure, vaporize the compressed reliquefied BOG, and Feed BOG to a high pressure natural gas injection engine. Background technique [0002] Recently, consumption of natural gas such as liquefied natural gas (LNG) or liquefied petroleum gas (LPG) has rapidly increased around the world. Liquefied gas is transported in gaseous state through gas pipelines on land or at sea, or transported to distant points of consumption when it is stored in liquid state in a liquefied gas carrier. Liquefied gases such as LNG or LPG are obtained by cooling natural gas or petroleum gas to low temperatures (approximately -163° C. in the case of LNG). Because of the ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F02M21/02F02M25/08F02M33/02F02M31/20
CPCF02M21/0215Y02T10/32F02M21/0245F02D19/022F02M21/0287F02M21/06F25J1/0052F25J1/0097F25J1/0212F25J1/023F25J1/0254F25J1/0277F25J1/0278F25J1/0291F25J2220/62F25J2230/08F25J2230/30F25J2230/60F25J2235/60F25J2290/62C09K5/045C09K2205/13F25J1/0025F25J1/0045Y02P20/10Y02T10/30F25J2215/02F25J2205/90F17C5/06
Inventor 郑承教郑济宪崔东圭李正汉文荣植柳珍烈
Owner DAEWOO SHIPBUILDING & MARINE ENG CO LTD
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