Experimental investigation of an ejector as a refrigerant expansion engine

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dc.contributor.authorMenegay, Peteren
dc.contributor.departmentMechanical Engineeringen
dc.date.accessioned2014-03-14T21:47:58Zen
dc.date.adate2009-10-22en
dc.date.available2014-03-14T21:47:58Zen
dc.date.issued1991en
dc.date.rdate2009-10-22en
dc.date.sdate2009-10-22en
dc.description.abstractThe use of an ejector to improve the performance of a vapor compression refrigeration system was investigated. The ejector harnesses kinetic energy developed during the throttling process and returns it to the compressor in the form of a pressure boost. An ejector was designed taking into account the expected nonequilibrium behavior in the motive nozzle, and assuming equilibrium conditions in the other components. A standard vapor compression system using R-12 was modified to test the ejector. Included in the resulting ejector cycle was a hot gas bypass arrangement which was found to effectively control the condenser and evaporator flowrate. Hot gas bypass was used instead of a throttling valve, which would have undermined the benefit of the ejector. Experiments were conducted by running the ejector cycle at varying amounts of hot gas bypass flow. Performance results for the ejector and the overall cycle were obtained which showed that while the ejector recovered some of the kinetic energy of the expansion process, its design needed optimization. Recommendations were made for a more in-depth study of the ejector cycle.en
dc.description.degreeMaster of Scienceen
dc.format.extent187 leavesen
dc.format.mediumBTDen
dc.format.mimetypeapplication/pdfen
dc.identifier.otheretd-10222009-124957en
dc.identifier.sourceurlhttp://scholar.lib.vt.edu/theses/available/etd-10222009-124957/en
dc.identifier.urihttp://hdl.handle.net/10919/45241en
dc.language.isoenen
dc.publisherVirginia Techen
dc.relation.haspartLD5655.V855_1991.M466.pdfen
dc.relation.isformatofOCLC# 25472522en
dc.rightsIn Copyrighten
dc.rights.urihttp://rightsstatements.org/vocab/InC/1.0/en
dc.subject.lccLD5655.V855 1991.M466en
dc.subject.lcshEvaporationen
dc.subject.lcshRefrigeration and refrigerating machineryen
dc.titleExperimental investigation of an ejector as a refrigerant expansion engineen
dc.typeThesisen
dc.type.dcmitypeTexten
thesis.degree.disciplineMechanical Engineeringen
thesis.degree.grantorVirginia Polytechnic Institute and State Universityen
thesis.degree.levelmastersen
thesis.degree.nameMaster of Scienceen

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