Thesis (MEng)--Stellenbosch University, 2014. / ENGLISH ABSTRACT: There are two methods generally used for heliostat field layout optimization:
the field growth method and the pattern method. A third, less
commonly used method also exists: the free variable method. Each of
these three methods offers its own set of advantages and disadvantages.
The purpose of this study is to explore the subject of heliostat field layout
optimization and to examine the free variable method. In order to
achieve this objective, optimization was conducted using the free variable
method. To perform optimization, a technical model of the heliostat field
was constructed using approximating functions from literature and geometric
analysis. Results of this study indicated that the free variable method
is possible using a gradient-based optimization algorithm. The free variable
method was applied to redesign the field of a commercial plant, PS10,
located in Spain. The original plant was improved by 1.2% in annual intercepted
energy. The study has demonstrated some of the characteristics,
advantages and pitfalls of the free variable method and has proved useful
in contributing to the understanding of heliostat field layout optimization.
The free variable method requires more research and development before it may be used commercially. / AFRIKAANSE OPSOMMING: Daar word oor die algemeen twee metodes gebruik om 'n heliostaatveld se
uitleg te optimeer: die terreinvermeerderingsmetode (field growth) en die
patroonmetode (pattern). 'n Derde, minder algemeen gebruikte metode
bestaan ook: die vrye veranderlike metode (free variable). Elkeen van hierdie
drie metodes bied sy eie voordele en nadele. Die doel van hierdie studie
is om die onderwerp van heliostaat veld uitleg optimalisering te verken en
die vrye veranderlike metode te ondersoek. Ten einde te hierdie oogmerk
te bereik, is die optimalisering uitgevoer met gebruik van die vrye veranderlike
metode. Om optimalisering uit te voer, is 'n tegniese model van
die heliostaat veld gebou met behulp van benader funksies van letterkunde
en geometriese analise. Resultate van hierdie studie het aangedui dat die
vrye veranderlike metode moontlik is deur gebruik te maak van 'n gradientbebaseerde
optimeeringslagoritme. Die vrye veranderlike metode is ook
aangewend om die terrien van 'n kommersiele aanleg, PS10 in Spanje, te
herontwerp. Die oorspronklike aanleg is in jaarlikse onderskep energie verbeter
met 1.2%. Die studie het sommige van die eienskappe, voordele en
slaggate van die vrye veranderlike metode getoon en het nuttige bewys
om by te dra tot die begrip van heliostaat veld uitleg optimalisering. Die
vrye veranderlike metode vereis meer navorsing en ontwikkeling voordat dit
kommersieel gebruik kan word.
| Identifer | oai:union.ndltd.org:netd.ac.za/oai:union.ndltd.org:sun/oai:scholar.sun.ac.za:10019.1/96043 |
| Date | 12 1900 |
| Creators | Lutchman, Shanley Lawrence |
| Contributors | Gauche, P., Groenwold, A. A., Stellenbosch University. Faculty of Engineering. Department of Mechanical and Mechatronic Engineering. |
| Publisher | Stellenbosch : Stellenbosch University |
| Source Sets | South African National ETD Portal |
| Language | en_ZA |
| Detected Language | Unknown |
| Type | Thesis |
| Format | xiii, 131 p. : ill. |
| Rights | Stellenbosch University |
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