Type

Now showing items 1-20 of 58

    • Air-cooled condenser steam flow distribution and related dephlegmator design considerations 

      Owen, Michael Trevor Foxwell (Stellenbosch : Stellenbosch University, 2013-12)
      ENGLISH ABSTRACT: The steam-side side operation of a practical air-cooled steam condenser is investigated using a combination of CFD, numerical, analytical and experimental methods. Particular attention is directed towards ...

    • Air-cooled heat exchangers and cooling towers : thermal-flow performance evaluation and design 

      Kroger, Detlev G. (Stellenbosch : Stellenbosch University, 2004-12)
      ENGLISH ABSTRACT: During the last 30 years I have been involved in the theory and practice of thermal engineering and in particular, in the areas of air-cooled heat exchangers and cooling towers for the power, refrigeration, ...

    • Application of a perforated shadow band to the decomposition of global solar irradiance 

      Brooks, Michael John (Stellenbosch : Stellenbosch University, 2015-12)
      ENGLISH ABSTRACT: The earth’s atmosphere causes pronounced spatial and temporal variability in downwelling solar radiation at the planet’s surface. Since the characterisation of sun strength is important in solar resource ...

    • Aspects of distributed conceptual design support 

      Schueller, Andreas (Stellenbosch : Stellenbosch University, 2002-04)
      ENGLISH ABSTRACT: The findings of an investigation into the requirements of a support system for distributed conceptual design in small and medium enterprises are presented. Distributed conceptual design refers to the ...

    • Characteristics of gas-liquid counterflow in inclined ducts with particular reference to reflux condensers 

      Zapke, Albert (Stellenbosch : Stellenbosch University, 1997-12)
      ENGLISH ABSTRACT: An experimental investigation on gas-liquid counterflow in inclined rectangular ducts is conducted. The pressure drop across the sharp-edged gas inlet and the pressure gradient inside the duct are ...

    • A critical evaluation and refinement of the performance prediction of wet-cooling towers 

      Kloppers, Johannes Christiaan (Stellenbosch : University of Stellenbosch, 2003-12)
      The thermal performance prediction of wet-cooling towers is critically analyzed and refined. Natural draft counterflow towers and mechanical draft counterflow and crossflow towers are considered. The Merkel, Poppe and ...

    • Design analysis of a lomolding machine 

      Goussard, Charl Leonard (Stellenbosch : University of Stellenbosch, 2007-12)
      This dissertation describes the design analysis of a lomolder (a machine similar to an injection moulding machine). It focuses on key design aspects that will drive the purchase cost of the machine and that will also ...

    • Design and development of a novel wave energy converter 

      Joubert, James Rattray (Stellenbosch : Stellenbosch University, 2013-12)
      ENGLISH ABSTRACT: The design, development and evaluation of a novel wave energy converter (WEC) device, called the ShoreSWEC, in a South African port development is presented. Based on the device requirements, site ...

    • Design and optimization of hydrofoil-assisted catamarans 

      Migeotte, Gunther (Stellenbosch : Stellenbosch University, 2002-03)
      ENGLISH ABSTRACT: This work is concerned with the hydrodynamic design of hydrofoil-assisted catamarans. Focus is placed on the development of new and suitable design methods and application of these to identify the most ...

    • The design, kinematics and error modelling of a novel micro-CMM parallel manipulator 

      Rugbani, Ali Milud (Stellenbosch : Stellenbosch University, 2014-04)
      ENGLISH ABSTRACT: The research presented in this dissertation establishes a micro-CMM parallel manipulator as a viable positioning device for three degree of freedom micro measurement applications. The machine offers the ...

    • Development of a dual-pressure air receiver system for the SUNDISC cycle 

      Heller, Lukas (Stellenbosch : Stellenbosch University, 2017-03)
      ENGLISH SUMMARY: Combined cycle CSP plants with solarized gas turbines have the potential to generate dispatchable electricity at a high efficiency and with the option to integrate cost-effective rock bed thermal energy ...

    • Development of patient-specific knee joint prostheses for unicompartmental knee replacement (UKR) 

      Van den Heever, David Jacobus (Stellenbosch : Stellenbosch University, 2011-12)
      ENGLISH ABSTRACT: The knee is the largest, most complicated and incongruent joint in the human body. It sustains very high forces and is susceptible to injury and disease. Osteoarthritis is a common disease prevalent ...

    • A direct approach for structural topology optimization 

      Munro, Pieter Munro (Stellenbosch : Stellenbosch University, 2017-03)
      ENGLISH ABSTRACT: This dissertation addresses various topics that emerge from the unification of conventional structural optimization—based on ‘sequential approximate optimization’ (SAO)—with the alternative ‘direct’—or ...

    • Dual sequential approximation methods in structural optimisation 

      Wood, Derren Wesley (Stellenbosch : Stellenbosch University, 2012-03)
      ENGLISH ABSTRACT: This dissertation addresses a number of topics that arise from the use of a dual method of sequential approximate optimisation (SAO) to solve structural optimisation problems. Said approach is widely ...

    • Early detection of risk of autism spectrum disorder based on recurrence quantification analysis of electroencephalographic signals 

      Heunis, Tosca-Marie (Stellenbosch : Stellenbosch University, 2016-03)
      ENGLISH ABSTRACT: Background: Autism spectrum disorder (ASD) is a neurodevelopmental disorder (NDD) with a prevalence of 1–2%. In low resource environments, in particular, early identification and diagnosis is a significant ...

    • Edge scanning and swept surface approximation in reverse engineering 

      Schreve, Kristiaan (Stellenbosch : Stellenbosch University, 2001-12)
      ENGLISH ABSTRACT: Broadly speaking Reverse Engineering is the process of digitising a physical object and creating a computer model of the object. If sharp edges formed by two surfaces can be extracted from a point cloud ...

    • The effect of endwall contouring on the unsteady flow through a turbine rotor 

      Dunn, Dwain Iain (Stellenbosch : Stellenbosch University, 2014-12)
      ENGLISH ABSTRACT: With increasing environmental concerns and the drive for a greener economy comes an increased desire to improve turbine engine fuel efficiency and reduce emissions. Unfortunately weight reduction ...

    • The effect of fuel formulation on the exhaust emissions of spark ignition engines 

      Bell, Arthur (Stellenbosch : University of StellenboschStellenbosch : University of Stellenbosch, 2006-03)
      The research described in this dissertation examined the effects that fuel formulation can have on the regulated exhaust emissions produced by spark ignition engines in a South African context. Typical South African ...

    • The effectiveness of axial flow fans in a-frame plenums 

      Venter, Sarel Jacobus; Kroger, D. G. (Stellenbosch : University of Stellenbosch, 1990-03)
      ENGLISH ABSTRACT: The ultimate goal of this project is to ensure a better understanding of the governing mechanisms present when flow distorting components are installed in close proximity of an axial flow fan. The ...

    • The effectiveness of particle dampers under centrifugal loads 

      Els, Daniel Nicolaas Johannes (Stellenbosch : University of Stellenbosch, 2009-03)
      The main research objective of this dissertation was to determine the performance parameters of particle dampers (PDs) under centrifugal loads. A test bench was developed consisting of a rotating cantilever beam with a ...