Investigation of ejector design at optimum operating condition

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dc.contributor.author Rogdakis, ED en
dc.contributor.author Alexis, GK en
dc.date.accessioned 2014-03-01T01:15:40Z
dc.date.available 2014-03-01T01:15:40Z
dc.date.issued 2000 en
dc.identifier.issn 0196-8904 en
dc.identifier.uri https://dspace.lib.ntua.gr/xmlui/handle/123456789/13657
dc.subject ammonia-water mixture en
dc.subject ejector en
dc.subject shock phenomena en
dc.subject.classification Thermodynamics en
dc.subject.classification Energy & Fuels en
dc.subject.classification Mechanics en
dc.subject.classification Physics, Nuclear en
dc.title Investigation of ejector design at optimum operating condition en
heal.type journalArticle en
heal.identifier.primary 10.1016/S0196-8904(00)00030-3 en
heal.identifier.secondary http://dx.doi.org/10.1016/S0196-8904(00)00030-3 en
heal.language English en
heal.publicationDate 2000 en
heal.abstract In the present work, an improved ejector theory, which was developed by Munday and Bagster is used, in order to study the thermodynamic behavior of the mixture NH3-H2O through an ejector. This ejector can be operated in combined ejector-absorption cycle using the binary mixture of ammonia-water. Kouremenos et al. showed that the heat gain factor (HGF) of a combined ejector-absorption system is 0.8-37.7% greater than those of the conventional absorption system. The design of ejector is based on Keenan et al.'s theory. Taking into account that the primary, secondary and back pressures are constant, there is a pressure before the shock where the flow entrainment ratio and the performance of the cycle (refrigeration or heat pump cycle) take maximum values. For this optimum value of flow entrainment ratio w, the value of area ratio A(t)/A(d) (cross section of minimum area of primary nozzle/cross section of constant area duct) can be estimated for an ejector's optimum design. The operation conditions were : primary pressure, 30-50 bar; secondary pressure, 3-5 bar; back pressure 10-14 bar; and mass fraction of ammonia vapor 97%. (C) 2000 Elsevier Science Ltd. All rights reserved. en
dc.identifier.doi 10.1016/S0196-8904(00)00030-3 en
dc.identifier.isi ISI:000088708900002 en
dc.identifier.volume 41 en
dc.identifier.issue 17 en
dc.identifier.spage 1841 en
dc.identifier.epage 1849 en

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