Supersonic nozzle flow in the two-phase ejector as water refrigeration system by using waste heat

dc.contributor.authorYamanaki, Hiroaki
dc.contributor.authorNakagawa, Masafumi
dc.date.accessioned2015-04-09T11:38:10Z
dc.date.available2015-04-09T11:38:10Z
dc.date.issued2012
dc.description.abstractPaper presented at the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.en_ZA
dc.description.abstractIn the near future the usage of waste heat in houses will be increased. The development of refrigeration system using waste heat is particularly needed for summer season consumptions. The ejector cycle can directly convert the thermal energy into the compression mechanical energy. Moreover, water which is one of the cleanest refrigerants can be used in the ejector cycle. As the steam ejector has been researched [1-3] as air conditioning system, the huge energy needed for large latent heat for water. We propose that the high-speed steam and water mixture, so-called two-phase flow, can be utilized instead of steam. It is theoretically shown that the heat need for this system will be reduced by the latent heat of hot water in two-phase flow, if the two-phase in the ejector flow has the same potential of acceleration and compression as steam. And the nozzle efficiencies for the two-phase flow of water are also obtained by the experiment.en_ZA
dc.format.extent6 pagesen_ZA
dc.format.mediumPDFen_ZA
dc.identifier.citationYamanaka, H & Nakagawa, M 2012, Supersonic nozzle flow in the two-phase ejector as water refrigeration system by using waste heat, Paper presented to the 9th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics, Malta, 16-18 July, 2012.en_ZA
dc.identifier.isbn9781868549863
dc.identifier.urihttp://hdl.handle.net/2263/44287
dc.language.isoenen_ZA
dc.publisherInternational Conference on Heat Transfer, Fluid Mechanics and Thermodynamicsen_ZA
dc.relation.ispartofHEFAT 2012en_US
dc.rightsUniversity of Pretoriaen_ZA
dc.subjectWaste heaten_ZA
dc.subjectRefrigeration system using waste heaten_ZA
dc.subjectEjector cycleen_ZA
dc.subjectThermal energyen_ZA
dc.subjectMechanical energyen_ZA
dc.titleSupersonic nozzle flow in the two-phase ejector as water refrigeration system by using waste heaten_ZA
dc.typePresentationen_ZA

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