IMPROVEMENTS TO REFRIGERANT FLAMMABILITY TESTING THROUGH USE OF A POLYCARBONATE APPARATUS

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dc.contributor.advisorSunderland, Peter Ben_US
dc.contributor.authorReymann, Jonathanen_US
dc.contributor.departmentFire Protection Engineeringen_US
dc.contributor.publisherDigital Repository at the University of Marylanden_US
dc.contributor.publisherUniversity of Maryland (College Park, Md.)en_US
dc.date.accessioned2017-06-22T06:31:30Z
dc.date.available2017-06-22T06:31:30Z
dc.date.issued2017en_US
dc.description.abstractThere is a new generation of mildly flammable refrigerants that pose unique challenges to flammability limit testing with ASTM E681. This test standard relies on visual observation of flame propagation inside of a spherical glass vessel. The combustion of these refrigerants etches the glass test vessel, making it difficult to properly observe the flame. The current standard specifies the electrodes to be placed vertically in the flame path, hindering the propagation of the flame. The rubber stopper that seals the vessel is prone to leak and also vent before the flame fully propagates, skewing the results of the test. These problems have been addressed through the creation of a polycarbonate testing apparatus that utilizes a weighted rubber stopper and electrodes that penetrate through the side of the vessel. This prototype was tested extensively with R-32, and yield a lower flammability limit of 14.8% when testing with a starting pressure of 91.2 kPa. The polycarbonate prototype proved to be an adequate alternative to the glass flask, and provided solutions to the etching, quenching, and venting issues.en_US
dc.identifierhttps://doi.org/10.13016/M28K4H
dc.identifier.urihttp://hdl.handle.net/1903/19513
dc.language.isoenen_US
dc.subject.pqcontrolledEngineeringen_US
dc.subject.pquncontrolledflammabilityen_US
dc.subject.pquncontrolledpolycarbonateen_US
dc.subject.pquncontrolledrefrigeranten_US
dc.titleIMPROVEMENTS TO REFRIGERANT FLAMMABILITY TESTING THROUGH USE OF A POLYCARBONATE APPARATUSen_US
dc.typeThesisen_US

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