Theoretical aspects of sorption refrigeration using organic compounds

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dc.contributor.advisorVicatos, Georgeen_ZA
dc.contributor.authorJin, Meihuaen_ZA
dc.date.accessioned2016-07-28T12:18:06Z
dc.date.available2016-07-28T12:18:06Z
dc.date.issued2016en_ZA
dc.description.abstractRefrigeration devices for essential food storage and preservation of medicine are among the most significant techniques developed in the past few decades. In many regions of Africa, the shortage of sustainable power sources and the abundance of solar energy make solar refrigerators a promising solution for basic refrigeration needs. Among all the solar cooling techniques, the solar sorption refrigerator is considered to be a promising alternative to the dominant vapour-compression refrigerator, which encompasses both absorption and adsorption refrigerators. It has advantages of being silent, having no compressor, lasting a long life cycle, and utilising waste heat or solar energy. In this work, the development of sorption refrigerators is outlined, and as a part of it, a theoretical diffusion absorption chiller using organic compounds is designed. The alternative working fluids used is R134a as the refrigerant, tetraethylene glycol dimethyl ether (TEG.DME) as the absorbent, and helium as the auxiliary gas. The corresponding modelling is carried out as a potential cooling system based on calculations. Furthermore, as a second part of this work, a laboratory prototype of a solid adsorption system being developed by the "Institute of Chemical Process Engineering (ICVT)" in Stuttgart University, is studied and compared. The study focuses on adsorption properties of methanol on activated carbon in adsorption process. Adsorption equilibrium data has been measured, and a good agreement between the measured equilibrium data and theoretical Dubinin-Astakhov model has been obtained. This prediction model can now be used to provide accurate data-sets, and consequently help to optimise the adsorption performance of the cooling unit. [Please note: this thesis file has been deferred until December 2016]en_ZA
dc.identifier.apacitationJin, M. (2016). <i>Theoretical aspects of sorption refrigeration using organic compounds</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering. Retrieved from http://hdl.handle.net/11427/20952en_ZA
dc.identifier.chicagocitationJin, Meihua. <i>"Theoretical aspects of sorption refrigeration using organic compounds."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 2016. http://hdl.handle.net/11427/20952en_ZA
dc.identifier.citationJin, M. 2016. Theoretical aspects of sorption refrigeration using organic compounds. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Jin, Meihua AB - Refrigeration devices for essential food storage and preservation of medicine are among the most significant techniques developed in the past few decades. In many regions of Africa, the shortage of sustainable power sources and the abundance of solar energy make solar refrigerators a promising solution for basic refrigeration needs. Among all the solar cooling techniques, the solar sorption refrigerator is considered to be a promising alternative to the dominant vapour-compression refrigerator, which encompasses both absorption and adsorption refrigerators. It has advantages of being silent, having no compressor, lasting a long life cycle, and utilising waste heat or solar energy. In this work, the development of sorption refrigerators is outlined, and as a part of it, a theoretical diffusion absorption chiller using organic compounds is designed. The alternative working fluids used is R134a as the refrigerant, tetraethylene glycol dimethyl ether (TEG.DME) as the absorbent, and helium as the auxiliary gas. The corresponding modelling is carried out as a potential cooling system based on calculations. Furthermore, as a second part of this work, a laboratory prototype of a solid adsorption system being developed by the "Institute of Chemical Process Engineering (ICVT)" in Stuttgart University, is studied and compared. The study focuses on adsorption properties of methanol on activated carbon in adsorption process. Adsorption equilibrium data has been measured, and a good agreement between the measured equilibrium data and theoretical Dubinin-Astakhov model has been obtained. This prediction model can now be used to provide accurate data-sets, and consequently help to optimise the adsorption performance of the cooling unit. [Please note: this thesis file has been deferred until December 2016] DA - 2016 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 2016 T1 - Theoretical aspects of sorption refrigeration using organic compounds TI - Theoretical aspects of sorption refrigeration using organic compounds UR - http://hdl.handle.net/11427/20952 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/20952
dc.identifier.vancouvercitationJin M. Theoretical aspects of sorption refrigeration using organic compounds. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Department of Mechanical Engineering, 2016 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/20952en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentDepartment of Mechanical Engineeringen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherMechanical Engineeringen_ZA
dc.titleTheoretical aspects of sorption refrigeration using organic compoundsen_ZA
dc.typeMaster Thesis
dc.type.qualificationlevelMasters
dc.type.qualificationnameMSc (Eng)en_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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