An Investigation of Void Fraction for Low GWP Refrigerants

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dc.contributor.advisorRadermacher, Reinharden_US
dc.contributor.authorSpencer, James Danielen_US
dc.contributor.departmentMechanical Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2013-07-04T05:33:08Z
dc.date.available2013-07-04T05:33:08Z
dc.date.issued2013en_US
dc.description.abstractAn experimental facility was designed and fabricated to test the void fraction of fluids. Measurements of the void fraction for R134a, R290, and R1234yf were conducted for low mass flux conditions at air-conditioning evaporator temperatures. Test sections of round tube inner diameters 2.99 and 4.56 mm were tested. Flow visualization was performed on the 4.56 mm test section. Results of the flow visualization revealed similar flow regime transition characteristics among the three refrigerants. Void fraction trends for R134a and R290 were found to be similar, while the void fraction for R1234yf trended higher than R134a for most points. The experimental data was compared to predictions by twelve void fraction correlations. For R134a and R290, the Steiner correlation most accurately predicted the data. For R1234yf, the Baroczy correlation was found to most accurately predict the data.en_US
dc.identifier.urihttp://hdl.handle.net/1903/14301
dc.subject.pqcontrolledMechanical engineeringen_US
dc.subject.pquncontrolledFlow Visualizationen_US
dc.subject.pquncontrolledLow GWPen_US
dc.subject.pquncontrolledR1234yfen_US
dc.subject.pquncontrolledR134aen_US
dc.subject.pquncontrolledR290en_US
dc.subject.pquncontrolledVoid Fractionen_US
dc.titleAn Investigation of Void Fraction for Low GWP Refrigerantsen_US
dc.typeThesisen_US

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