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dc.contributorDepartment of Building Services Engineeringen_US
dc.contributor.advisorHuang, Xinyan (BSE)en_US
dc.creatorJia, Yifan-
dc.identifier.urihttps://theses.lib.polyu.edu.hk/handle/200/10873-
dc.languageEnglishen_US
dc.publisherHong Kong Polytechnic Universityen_US
dc.rightsAll rights reserveden_US
dc.titleFire hazards of thermoplastic drips-dripping ignition theoryen_US
dcterms.abstractWith the development of cities in recent years and the need for high-rise buildings, the fire caused by the dripping of thermoplastic drips is common. A pool fire is formed when molten drips attached flame fall from height and converge on a platform. In recent years, the researches and simulations of flame propagation on electric wire and building facade is hot topic. However, potential fire hazards behind this phenomenon have been found by very few people. In this work, an experimental study explains the fire hazards by quantified method. Laborotary electrical wire with four different sizes and priter paper with three thicknesses reveals quantified results. By igniting laborotary wires, molten single drip with four different mass, which are 2.6mg, 3.3mg, 4.6mg and 6.2mg, will land on and ignite paper samples, whose thinknesses are respectively 0.07mm, 0.15mm and 0.32mm. Through thousands of experimental tests, two common phenomenon have found: carnonized phenomenon (pyrolysis of paper and mass loss) and whitening phenomenon (a signal for critical heat gained by paper sample) on the landing point of paper sample. Meanwile, different limit ignition trend for three different-thickness paper sample can be observed in chart by using ignition probability (Pig=50%) as ignition. Finally, in scenario C (controlling mass of single drip is 4.6mg), the critical dripping frequency for three different-thickness paper sample was analysed by using thermocouples to measure upper and bottom surface temperature of paper sample. This work studies basic information of thermoplastic drips-dripping ignition theory.en_US
dcterms.extentix, 70 pages : color illustrationsen_US
dcterms.isPartOfPolyU Electronic Thesesen_US
dcterms.issued2020en_US
dcterms.educationalLevelM.Eng.en_US
dcterms.educationalLevelAll Masteren_US
dcterms.LCSHFire testingen_US
dcterms.LCSHElectric cables -- Testingen_US
dcterms.LCSHHong Kong Polytechnic University -- Dissertationsen_US
dcterms.accessRightsrestricted accessen_US

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Please use this identifier to cite or link to this item: https://theses.lib.polyu.edu.hk/handle/200/10873