Pressure Measurements for Refrigerant Flammability Limit Testing Using ASTM E681 Apparatus

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dc.contributor.advisorSunderland, Peter Ben_US
dc.contributor.authorKlieger, Alexandra Eveen_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.accessioned2018-09-06T05:31:00Z
dc.date.available2018-09-06T05:31:00Z
dc.date.issued2017en_US
dc.description.abstractImprovements to the ASHRAE 34 and ASTM E681 standard test apparatus and procedure have been identied to make the test more repeatable and reproducible. Currently, the test apparatus centers around a glass flask with visual flammability criteria that can be subjective and dependent on a wide variety of factors. Additionally, the current test apparatus vents close to the time where the visual criteria is evaluated which can impact flame propagation. A high frequency pressure transducer was added to the testing apparatus to understand the pressure development in the test vessel throughout flame propagation. Initial test pressures below atmospheric were studied to reduce the likelihood of premature venting. Quenching effects from the electrode rods of the test apparatus were quantied as well. Ultimately, a fractional pressure rise of 40% from a mixture starting at 91.2 kPa was proposed as a new pressure-based flammability criteria to potentially replace the current visual criteria. This new criteria would result in an lower flammability limit of 14.0% for R32.en_US
dc.identifierhttps://doi.org/10.13016/M27P8TH3V
dc.identifier.urihttp://hdl.handle.net/1903/21112
dc.language.isoenen_US
dc.subject.pqcontrolledEngineeringen_US
dc.subject.pqcontrolledMechanical engineeringen_US
dc.subject.pquncontrolledASTM E681en_US
dc.subject.pquncontrolledFlammabilityen_US
dc.subject.pquncontrolledLower flammability limiten_US
dc.subject.pquncontrolledQuenchingen_US
dc.subject.pquncontrolledR32en_US
dc.subject.pquncontrolledRefrigeranten_US
dc.titlePressure Measurements for Refrigerant Flammability Limit Testing Using ASTM E681 Apparatusen_US
dc.typeThesisen_US

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