Fuel gas dispersion under cryogenic release conditions

Sklavounos, S; Rigas, F

dc.contributor.author	Sklavounos, S	en
dc.contributor.author	Rigas, F	en
dc.date.accessioned	2014-03-01T01:22:26Z
dc.date.available	2014-03-01T01:22:26Z
dc.date.issued	2005	en
dc.identifier.issn	0887-0624	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16568
dc.subject.classification	Energy & Fuels	en
dc.subject.classification	Engineering, Chemical	en
dc.subject.other	Boundary conditions	en
dc.subject.other	Computational fluid dynamics	en
dc.subject.other	Computer simulation	en
dc.subject.other	Cryogenics	en
dc.subject.other	Hazardous materials spills	en
dc.subject.other	Hydrogen fuels	en
dc.subject.other	Liquefied natural gas	en
dc.subject.other	Atmospheric dispersion	en
dc.subject.other	Cryogenic release conditions	en
dc.subject.other	Fuel gas dispersion	en
dc.subject.other	Liquified hydrogen	en
dc.subject.other	Gas fuels	en
dc.title	Fuel gas dispersion under cryogenic release conditions	en
heal.type	journalArticle	en
heal.identifier.primary	10.1021/ef0500383	en
heal.identifier.secondary	http://dx.doi.org/10.1021/ef0500383	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	In this paper, a computational approach to the atmospheric dispersion that is associated with cryogenic releases of the gaseous fuels hydrogen and natural gas was attempted. A computational fluid dynamics (CFD) method was followed, using the code CFX 5.7 for the simulation of large-scale liquefied hydrogen and liquefied natural gas spill trials, which provided successful prediction of the concentration histories, against experimental records. The main outcome that was determined through the results was that fuel gases, such as natural gas and hydrogen, disperse as heavy gases rather than light gases during a cryogenic release, despite their positive buoyancy under normal conditions. This conclusion is of major importance from the standpoint of safety, in regard to chemical installations that handle liquefied gases, given that the gravity-driven dispersion of flammable gases increases the risk of ignition and, hence, accidental fire or explosion. Thus, the behavior of the released gas should be known when selecting the appropriate dispersion model that will be used in industrial safety studies. Furthermore, it was concluded that CFD may be effectively used in risk analysis procedures, providing reliable results even for the complex case of nonisothermal atmospheric gas release. © 2005 American Chemical Society.	en
heal.publisher	AMER CHEMICAL SOC	en
heal.journalName	Energy and Fuels	en
dc.identifier.doi	10.1021/ef0500383	en
dc.identifier.isi	ISI:000233419100044	en
dc.identifier.volume	19	en
dc.identifier.issue	6	en
dc.identifier.spage	2535	en
dc.identifier.epage	2544	en