Three-dimensional absorption process in aqua-ammonia absorption refrigerators using helium as inert gas

Kouremenos, DA; Stegou-Sagia, A; Antonopoulos, KA

dc.contributor.author	Kouremenos, DA	en
dc.contributor.author	Stegou-Sagia, A	en
dc.contributor.author	Antonopoulos, KA	en
dc.date.accessioned	2014-03-01T01:44:56Z
dc.date.available	2014-03-01T01:44:56Z
dc.date.issued	1996	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/24521
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0030408784&partnerID=40&md5=00848fdd373da8782afc3c3f852b37c1	en
dc.subject.other	Calculations	en
dc.subject.other	Differential equations	en
dc.subject.other	Finite difference method	en
dc.subject.other	Heat transfer	en
dc.subject.other	Helium	en
dc.subject.other	Inert gases	en
dc.subject.other	Mass transfer	en
dc.subject.other	Numerical methods	en
dc.subject.other	Refrigerators	en
dc.subject.other	Three dimensional	en
dc.subject.other	Tubes (components)	en
dc.subject.other	Absorption refrigerators	en
dc.subject.other	Circular absorption tube	en
dc.subject.other	Absorption	en
dc.title	Three-dimensional absorption process in aqua-ammonia absorption refrigerators using helium as inert gas	en
heal.type	journalArticle	en
heal.publicationDate	1996	en
heal.abstract	In order to eliminate the danger of a possible explosion in neutral gas NH3/H2O absorption refrigerators using hydrogen as the inert gas, helium can be used as a substitute. A numerical procedure is presented for the calculation of the absorption process. In previous studies the problem was simplified by considering the circular absorption tube in a vertical position with the liquid NH3/H2O stream being of annular cross section, thus resulting in a two-dimensional situation. In the present study the three-dimensional heat and mass transfer process is considered, in which the absorption tube is nearly horizontal and the liquid NH3/H2O stream has a circular meniscus cross-section. The developed procedure which is based on a finite-difference solution of the three-dimensional momentum, energy and mass transport differential equations, may be used in the design of absorbers for inert gas absorption refrigeration units. It is concluded that helium behaves similarly to hydrogen and therefore it can replace it, in order to eliminate the danger of an explosion.	en
heal.journalName	American Society of Mechanical Engineers, Advanced Energy Systems Division (Publication) AES	en
dc.identifier.volume	36	en
dc.identifier.spage	365	en
dc.identifier.epage	370	en