Dynamic evaluation of the solar chimney

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dc.contributor.advisor Van Zijl, G. P. A. G.
dc.contributor.author Rousseau, Jean-Pierre en_ZA
dc.contributor.other University of Stellenbosch. Faculty of Engineering. Dept. of Civil Engineering.
dc.date.accessioned 2008-07-28T11:50:02Z en_ZA
dc.date.accessioned 2010-06-01T08:30:22Z
dc.date.available 2008-07-28T11:50:02Z en_ZA
dc.date.available 2010-06-01T08:30:22Z
dc.date.issued 2005-12
dc.identifier.uri http://hdl.handle.net/10019.1/1674
dc.description Thesis (MEng (Civil Engineering))--University of Stellenbosch, 2005.
dc.description.abstract Previous studies on the solar chimney have shown that its structural integrity might be compromised by the occurrence of resonance. A structure may displace excessively when a load of the same frequency as a structural eigen-frequency is applied. The wind gust spectrum peaks near the solar chimney’s fundamental resonance frequency. This phenomenon poses a reliability threat, not only to the solar chimney, but also to all high-rise, slender structures. Structural dynamics describe the response of a structure to a varying load. The dynamic equation incorporates four terms that bind the factors responsible for resonance: kinetic energy, dissipated energy (damping), stiffness energy and input energy (loading). After a brief literature study on classical chimney design procedures, the study scrutinises each of these terms individually in the context of the solar chimney as designed to date. A dynamic analysis is undertaken with all the above-mentioned parameters as defined and estimated by the study. The results from the analysis show amplifications of approximately three times the static displacements. In load cases where the wind direction inverts along the height, higher eigen-modes are excited. However, the most severe dynamic amplification occurs at the fundamental eigen-mode. In the context of solar chimney research, this study brings valuable new insights regarding the dynamic behaviour of the chimney structure to the fore. en_ZA
dc.language.iso en en_ZA
dc.publisher Stellenbosch : University of Stellenbosch
dc.subject Theses -- Civil engineering en_ZA
dc.subject Dissertations -- Civil engineering en_ZA
dc.subject.lcsh Solar power plants en_ZA
dc.subject.other Civil engineering en_ZA
dc.title Dynamic evaluation of the solar chimney en_ZA
dc.type Thesis en_ZA
dc.rights.holder University of Stellenbosch


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