Department of Mechanical and Mechatronic Engineering
Collections in this community
Recent Submissions
-
Hydraulic modeling of a confined gas recirculation mixing system for a CSTR anaerobic digester
(2016)Hydraulic numerical rnadelling and experimental werk was used to develop a mixing system, that is able to satisfy the biologica! requirement of micro bacteria and create a homogeneaus salution inside the digester. A ... -
Performance characterisation of a separated heat-pipe-heat-recovery-heat-exchanger for the food drying industry
(2016)This paper presents the performance evaluation of a separated-HPHRHE for use in the food processing industry. The outside heat transfer coefficients were obtained by passing hot air over a HPHE filled with cold water and ... -
Theoretical modelling and experimental verification of the heat transfer behaviour of a water-charged closed-end loop pulsating heat pipe
(2001)In this paper the theoretical modelling of a Pulsating Heat Pipe (PHP) is presented. In this particular model the flow of the working fluid is modelled as discrete liquid plugs moving back and forth because of the evaporation ... -
Investigation of two-stage electrostatic precipitation for silver removal from a helium stream
(2010)In high temperature gas cooled nuclear reactors various unwanted particles have been found to plate out onto the surfaces of the primary cicuit components. A simple deterministic deflection model is outlined in this paper ... -
Use of passive cooling systems in generation IV nuclear reactors for core decay heat removal and containment cooling
(2011)The Pebble Bed Modular Reactor (PBMR) concept evolved from a German high temperature helium-cooled reactor design with ceramic spherical fuel pebbles. The removal of parasitic heat between the reactor core and concrete ... -
Numerical modelling of a loop-type heat pipe suitable for the reactor cavity cooling system of the Pebble Bed Modular Reactor
(2011)The feasibility of a closed loop thermosyphon for the Reactor Cavity Cooling System (RCCS) of the Pebble Bed Modular Reactor has been the subject of many research projects. One of the difficulties identified by previous ... -
Inside-pipe heat transfer coefficient characterization of a thermosyphon-type heat pipe suitable for the reactor cavity cooling system of the Pebble Bed Modular Reactor
(2011)The feasibility of a closed loop thermosyphon for the Reactor Cavity Cooling System of the Pebble Bed Modular Reactor has been the subject of many research projects. One of the difficulties identified by previous studies ... -
Experimental investigation and numerical simulation of instabilities in a multi-parallel channel two-phase natural circulation system
(2015)In the present study, two-phase natural circulation flow in a multi-parallel channel system is investigated using experimental and numerical modelling. The experimental model consisted, essentially, of four 25 mm diameter ... -
Small scale organic Rankine cycle for solar applications
(2015)The global demand for energy has risen dramatically in recent years and the cost of electricity has risen considerably. Local electricity sales prices followed the global trend, increasing by an average of 25% per annum ... -
Deflection of Ag-atoms in a magnetic field
(2011)An apparatus that generates and deflect silver-109 atoms with an inhomogeneous and homogeneous magnetic field was constructed. The experimental results found using this apparatus were used to make a recommendation, to ... -
Thermally driven natural circulation water pump
(2015)ENGLISH ABSTRACT: The water utilized by passive air-conditioning systems in buildings is typically required at higher elevations. The thermally driven natural circulation water pump (TDNCWP) is a passively driven pumping ... -
Thermal modelling of a heat block and heat sink connected by heat pipes using finite element methods
(2001)ENGLISH ABSTRACT: This article considers the heat transfer between a simple heat block and a heat sink, using heat pipes as the energy transport medium. Both the heat block and heat sink are made from carbon steel. The ... -
The development of a 1D-transient simulation model of a CO2 refrigeration system
(2016)ENGLISH ABSTRACT: Refrigeration is a highly essential part of modern day living. The drive for alternative cleaner technologies has renewed interest in designing refrigeration systems using CO2 as refrigerant. The goal of ... -
The design and testing of a secure surface tension driven water pump
(2015)ENGLISH ABSTRACT: Water pumping is essential for life as we know it. The drive for alternative energies together with the need for water pumping has inspired the construction of a surface tension driven water pump (STDWP). ... -
Silver ion generation, deflection and deposition in vacuum
(2011)ENGLISH ABSTRACT: The potential problems arising during the operation of a pebble bed modular type reactor has stimulated a number of research avenues in different fields. This study presents results of a first approach method ... -
Tensile and high cycle fatigue properties of annealed TI6AL4V (ELI) specimens produced by direct metal laser sintering
(Southern African Institute for Industrial Engineering, 2018-11-08)ENGLISH ABSTRACT: The tensile and high cycle fatigue (HCF) properties of high temperature annealed (HTA) direct metal laser sintered (DMLS) Ti6Al4V extra low interstitial (ELI) machined and polished specimens were investigated. ... -
Numerical optimisation of a small-scale wind turbine through the use of surrogate modelling
(University of Cape Town, Energy Research Centre, 2017)ENGLISH ABSTRACT: Wind conditions in South Africa are suitable for small-scale wind turbines, with wind speeds below 7 m.s−1. This investigation is about a methodology to optimise a full wind turbine using a surrogate ... -
Modelling and testing a passive night-sky radiation system
(University of Cape Town, Energy Research Centre, 2017)ENGLISH ABSTRACT: The as-built and tested passive night-sky radiation cooling/heating system considered in this investigation consists of a radiation panel, a cold water storage tank, a hot water storage tank, a room and ... -
Overview of predictive CSP spread prospects and its opportunities
(Energy Research Centre, 2016-05)An investigation was carried out to illustrate the prospects and challenges associated with implementation of concentrating solar power (CSP) with storage technology in South Africa. Various factors were examined that have ... -
Scoping exercise to determine load profile archetype reference shapes for solar co-generation models in isolated off-grid rural African villages
(Energy Research Centre, 2016-08)For many off-grid rural communities, renewable energy resources may be the only viable option for household and village energy supply and electrification. This is especially true for many rural regions in Southern Africa, ...
RSS 1.0