Solar energy collection using vee-grooved surfaces

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dc.contributor.advisorDutkiewicz, Ryszard Karolen_ZA
dc.contributor.authorKemper, Jens Peteren_ZA
dc.date.accessioned2016-03-21T19:02:39Z
dc.date.available2016-03-21T19:02:39Z
dc.date.issued1977en_ZA
dc.descriptionBibliography: pages 98-103.en_ZA
dc.description.abstractThe thesis presented is a study of the absorption characteristics of diffusely and specularly reflecting V-grooved surfaces. Concepts are developed for the so-called "apparent" absorptance of a V-groove cavity, as well as for the "effective" absorptance of a V-grooved surface. These concepts are formulated in closed form mathematical equations, which facilitate both the optimization of V-grooved surfaces and their engineering design. In order to verify the theoretical analysis, experiments are carried out on 34 V-grooved brass specimens. In addition, the experiments are meant to provide information about the behaviour of such surfaces used for solar energy collection. For that purpose, the specimens are exposed to simulated sunlight, and their effective absorptances, as well as their absorption efficiencies, are determined by a calorimetric method. The highlights among the results are: 1. V-grooves - carefully optimized and applied to a solar energy absorbing surface - can raise its absorptance almost to unity and improve its absorption efficiency. 2. Best performances at elevated temperatures can be expected from using metal surfaces which are provided with specular V-grooves having a small groove angle (< 30⁰). 3. The optimal groove angle is dependent on (1) the reflection properties of the surface, (2) the absorptance of the surface material, and (3) the ratio of groove depth to width of land which occurs between grooves.en_ZA
dc.identifier.apacitationKemper, J. P. (1977). <i>Solar energy collection using vee-grooved surfaces</i>. (Thesis). University of Cape Town ,Faculty of Engineering & the Built Environment ,Energy Research Centre. Retrieved from http://hdl.handle.net/11427/18012en_ZA
dc.identifier.chicagocitationKemper, Jens Peter. <i>"Solar energy collection using vee-grooved surfaces."</i> Thesis., University of Cape Town ,Faculty of Engineering & the Built Environment ,Energy Research Centre, 1977. http://hdl.handle.net/11427/18012en_ZA
dc.identifier.citationKemper, J. 1977. Solar energy collection using vee-grooved surfaces. University of Cape Town.en_ZA
dc.identifier.ris TY - Thesis / Dissertation AU - Kemper, Jens Peter AB - The thesis presented is a study of the absorption characteristics of diffusely and specularly reflecting V-grooved surfaces. Concepts are developed for the so-called "apparent" absorptance of a V-groove cavity, as well as for the "effective" absorptance of a V-grooved surface. These concepts are formulated in closed form mathematical equations, which facilitate both the optimization of V-grooved surfaces and their engineering design. In order to verify the theoretical analysis, experiments are carried out on 34 V-grooved brass specimens. In addition, the experiments are meant to provide information about the behaviour of such surfaces used for solar energy collection. For that purpose, the specimens are exposed to simulated sunlight, and their effective absorptances, as well as their absorption efficiencies, are determined by a calorimetric method. The highlights among the results are: 1. V-grooves - carefully optimized and applied to a solar energy absorbing surface - can raise its absorptance almost to unity and improve its absorption efficiency. 2. Best performances at elevated temperatures can be expected from using metal surfaces which are provided with specular V-grooves having a small groove angle (< 30⁰). 3. The optimal groove angle is dependent on (1) the reflection properties of the surface, (2) the absorptance of the surface material, and (3) the ratio of groove depth to width of land which occurs between grooves. DA - 1977 DB - OpenUCT DP - University of Cape Town LK - https://open.uct.ac.za PB - University of Cape Town PY - 1977 T1 - Solar energy collection using vee-grooved surfaces TI - Solar energy collection using vee-grooved surfaces UR - http://hdl.handle.net/11427/18012 ER - en_ZA
dc.identifier.urihttp://hdl.handle.net/11427/18012
dc.identifier.vancouvercitationKemper JP. Solar energy collection using vee-grooved surfaces. [Thesis]. University of Cape Town ,Faculty of Engineering & the Built Environment ,Energy Research Centre, 1977 [cited yyyy month dd]. Available from: http://hdl.handle.net/11427/18012en_ZA
dc.language.isoengen_ZA
dc.publisher.departmentEnergy Research Centreen_ZA
dc.publisher.facultyFaculty of Engineering and the Built Environment
dc.publisher.institutionUniversity of Cape Town
dc.subject.otherEnergy Researchen_ZA
dc.subject.otherSolar Energyen_ZA
dc.titleSolar energy collection using vee-grooved surfacesen_ZA
dc.typeDoctoral Thesis
dc.type.qualificationlevelDoctoral
dc.type.qualificationnamePhDen_ZA
uct.type.filetypeText
uct.type.filetypeImage
uct.type.publicationResearchen_ZA
uct.type.resourceThesisen_ZA
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