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Title: Analysis of Temperature and Pressure Changes in Liquefied Natural Gas (LNG) Cryogenic Tanks
Author: Chen QS(陈启生); Wegrzyn J; Prasad V
Source: Cryogenics
Issued Date: 2004
Volume: 44, Issue:10, Pages:701-709
Abstract: Liquefied natural gas (LNG) is being developed as a transportation fuel for heavy vehicles such as trucks and transit buses, to lessen the dependency on oil and to reduce greenhouse gas emissions. The LNG stations are properly designed to prevent the venting of natural gas (NG) from LNG tanks, which can cause evaporative greenhouse gas emissions and result in fluctuations of fuel flow and changes of fuel composition. Boil-off is caused by the heat added into the LNG fuel during the storage and fueling. Heat can leak into the LNG fuel through the shell of tank during the storage and through hoses and dispensers during the fueling. Gas from tanks onboard vehicles, when returned to LNG tanks, can add additional heat into the LNG fuel. A thermodynamic and heat transfer model has been developed to analyze different mechanisms of heat leak into the LNG fuel. The evolving of properties and compositions of LNG fuel inside LNG tanks is simulated. The effect of a number of buses fueled each day on the possible total fuel loss rate has been analyzed. It is found that by increasing the number of buses, fueled each day, the total fuel loss rate can be reduced significantly. It is proposed that an electric generator be used to consume the boil-off gas or a liquefier be used to re-liquefy the boiloff gas to reduce the tank pressure and eliminate fuel losses. These approaches can prevent boil-off of natural gas emissions, and reduce the costs of LNG as transportation fuel.
Language: 英语
Indexed Type: SCI ; EI
Corresponding Author: Wegrzyn, J (reprint author), Brookhaven Natl Lab, Energy Sci & Technol Dept, Upton, NY 11973 USA.
Correspondent Email: jwegrzyn@bnl.gov
DOI: 10.1016/j.cryogenics.2004.03.020
DOC Type: Article
WOS Subject: Thermodynamics ; Physics, Applied
WOS Subject Extended: Thermodynamics ; Physics
WOS ID: WOS:000222787900004
ISSN: 0011-2275
Subject: 力学
Citation statistics:
Content Type: 期刊论文
URI: http://dspace.imech.ac.cn/handle/311007/17172
Appears in Collections:力学所知识产出(1956-2008)_期刊论文

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