A technological solutions set to ensure the safety of storage of liquefied natural gas

Martynenko, Y.V.; Voronov, V.A.

doi:10.1201/9780429327070-15

Cited by 3 publications

(1 citation statement)

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“…Based on the analysis of the problems of the energy market [1][2][3] and the current green energy agenda [4][5][6], it may be concluded that the issues of waste energy source recovery are among the most pressing. For liquefied natural gas (LNG), one of the possible ways to solve this issue is the recovery and recycling of its boil-off gas, which nowadays is discharged from the LNG tanks using ejectors [7][8][9]. The use of the ejectors as energy-efficient pumps was the subject of the works of the authors [10][11][12][13]; the works of the scientists [14][15][16] are dedicated to the outflow of gases and liquids from the nozzles of different designs-these are the main components of the ejectors; the papers of the authors [17,18] deal with the calculation of the nozzle geometry and its computer modelling.…”

Section: Introductionmentioning

confidence: 99%

Experimental Determination of the Flow Coefficient for a Constrictor Nozzle with a Critical Outflow of Gas

Bolobov

Martynenko

Yurtaev

2023

Fluids

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Reduction of energy expenditures required for various technological processes is a pressing issue in today’s economy. One of the ways to solve this issue in regard to liquefied natural gas (LNG) storage is the recovery of its vapours from LNG tanks using an ejector system. In that respect, studies on the outflow of the real gas through the nozzle, the main element of the ejector, and identifying differences from the ideal gas outflow, are of high relevance. Particularly, this concerns the determination of the discharge coefficient µ as the ratio of the actual flowrate to the ideal one, taking into account the energy losses at gas outflow through the nozzle. The discharge coefficient values determined to date for various nozzle geometries are, as a rule, evaluated empirically and contradictory in some cases. The authors suggest determining the discharge coefficient by means of an experiment. This paper includes µ values determined using this method for the critical outflow of air to atmosphere through constrictor nozzles with different outlet diameters (0.003 m; 0.004 m; 0.005 m) in the pressure range at the nozzle inlet of 0.5–0.9 MPa. The obtained results may be used for the design of an ejector system for the recovery of the boil-off gas from LNG tanks, as well as in other fields of industry, for the design of technical and experimental devices with nozzles for various applications.

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Section: Introductionmentioning

confidence: 99%

Experimental Determination of the Flow Coefficient for a Constrictor Nozzle with a Critical Outflow of Gas

Bolobov

Martynenko

Yurtaev

2023

Fluids

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Use of liquid-gas ejector in liquefied natural gas (LNG) sampling system

2021

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The article considers the modernization of the periodic sampling system of liquefied natural gas (LNG)by introducing a liquid-gas ejector (LGE) as an alternative to a gas compressor. The unique properties of liquefied natural gas allow the fuel energy to be directed to the ejector without any externalenergy input. Besides, the advantage of this method is that it prevents changes in the original chemical composition of the sample due to the liquid-gas ejector, which does not require lubricating oils. Also, the system reduces the volume of the regasified sample and eliminates the possibility of ejector failure.

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Improvement of the Liquefied Natural Gas Vapor Utilization System Using a Gas Ejector

et al. 2022

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The production, transportation, and storage of liquefied natural gas (LNG) is a promising area in the gas industry due to a number of the fuel’s advantages, such as its high energy intensity indicators, its reduced storage volume compared to natural gas in the gas-air state, and it ecological efficiency. However, LNG storage systems feature a number of disadvantages, among which is the boil-off gas (BOG) recovery from an LNG tank by flaring it or discharging it to the atmosphere. Previous attempts to boil-off gas recovery using compressors, in turn, feature such disadvantages as large capital investments and operating costs, as well as low reliability rates. The authors of this article suggest a technical solution to this problem that consists in using a gas ejector for boil-off gas recovery. Natural gas from a high-pressure gas pipeline is proposed as a working fluid entraining the boil-off gas. The implementation of this method was carried out according to the developed algorithm. The proposed technical solution reduced capital costs (by approximately 170 times), metal consumption (by approximately 100 times), and power consumption (by approximately 55 kW), and improved the reliability of the system compared to a compressor unit. The sample calculation of a gas ejector for the boil-off gas recovery from an LNG tank with a capacity of 300 m3 shows that the ejector makes it possible to increase the boil-off gas pressure in the system by up to 1.13 MPa, which makes it possible to not use the first-stage compressor unit for the compression of excess vapours.

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A technological solutions set to ensure the safety of storage of liquefied natural gas

Cited by 3 publications

References 0 publications

Experimental Determination of the Flow Coefficient for a Constrictor Nozzle with a Critical Outflow of Gas

Experimental Determination of the Flow Coefficient for a Constrictor Nozzle with a Critical Outflow of Gas

Use of liquid-gas ejector in liquefied natural gas (LNG) sampling system

Improvement of the Liquefied Natural Gas Vapor Utilization System Using a Gas Ejector

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