Experimental study of two-phase closed vertical thermosyphons for sub-ambient temperature applications

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dc.contributor.authorSilveira, Pedro Saynovich Berto da
dc.contributor.supervisorRowe, Andrew Michael
dc.date.accessioned2018-12-20T23:28:57Z
dc.date.available2018-12-20T23:28:57Z
dc.date.copyright2018en_US
dc.date.issued2018-12-20
dc.degree.departmentDepartment of Mechanical Engineering
dc.degree.levelMaster of Applied Science M.A.Sc.en_US
dc.description.abstractTwo-phase closed vertical thermosyphons (TCVT), also known as gravity-assisted heat pipes, are very e cient heat transfer devices. They work in two-phase close cycles where latent heat of evaporation and condensation is used to transfer heat, and are widely employed in industry applications. The increasing number of thermally e cient equipment that apply TCVT are explained by their high geometric exibility and low cost, being important solutions for heat transfer and temperature control problems. This research presents a brief guide on the design, prototyping, and experimental testing of two-phase closed vertical thermosyphons (TCVT). The work was conducted at LEPTEN/Labtucal, a research laboratory in Brazil focused on applied heat transfer elds, which includes heat pipe and thermosyphon technology development. The design and prototyping guidelines of a TCVT are described in details. All the prototyping and testing of the system is conducted according to procedures presented in up-to-date literature, using proper equipment and following the steps previously established by other researchers. The experimental setup and methods to evaluate the designed TCVT performance are presented. Experimental results for two uids (namely R141b and acetone) using di erent lling ratios are showed in order to obtain the percentage of uid that yields the minimum temperature di erence along the thermosyphon. Results are discussed and further analyzed to conclude the con guration that achieves best performance.en_US
dc.description.scholarlevelGraduateen_US
dc.identifier.urihttp://hdl.handle.net/1828/10449
dc.languageEnglisheng
dc.language.isoenen_US
dc.rightsAvailable to the World Wide Weben_US
dc.subjectThermosyphonsen_US
dc.subjectRefrigerationen_US
dc.subjectpassive refrigerationen_US
dc.subjectheat pipesen_US
dc.titleExperimental study of two-phase closed vertical thermosyphons for sub-ambient temperature applicationsen_US
dc.typeThesisen_US

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