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A large number of load shifting projects have been successfully implemented on mine dewatering pumps since the inception of Eskom's Demand Side Management (DSM) initiative in 2003. In addition to electrical cost savings, mines have benefitted from reduced operational costs and the installation of new equipment such as electrically actuated valves, pressure sensors, programmable logic controllers,...
This paper presents an economic and theoretical feasibility study of the application of Micro Hydro Turbines at a case study Pressure Regulating Valve (PRV) site in a South African municipality's bulk water supply system. By examining data collected from the case study site it is possible to determine the flow rate available and pressure of the supply water flowing through the PRV system. Using this...
Big data can be defined as a collection of large and complex data sets which are difficult to process using readily available or traditional data processing applications. These big data sets introduce new challenges such as capture, storage, search, sharing, transfer, analysis, versioning and visualization. This paper present a design philosophy, techniques and experience, from an information technology...
The use of low flow shower heads is presently considered as one of the solutions that can contribute to the global effort towards the optimisation of energy consumption. In the leisure (hotels, gymnasiums) and residential sectors, the use of low flow shower heads can lead to significant energy savings. In South Africa, Eskom has recently launched a mass roll out programme intended to save energy through...
BBEnergy developed a prototype and subsequent 150kW demonstration Linear Fresnel Concentrated Solar Thermal Power Plant. This demonstration plant was commissioned in January 2013 and is the first of its kind in South Africa. It was designed, constructed and commissioned with South African know-how, labour and materials. This facility consists of 6 rows of mirrors, in a north-south alignment with slight...
Two case studies are presented, showing the feasibility of retrofitting LED tubes to replace fluorescent lights in a single office as well as in a suite of offices in the Engineering Faculty Building of the Cape Town Campus of the Cape Peninsula University of Technology. The new type of LED tubes used, require no change of light fittings, thus facilitating retrofits. In order to convince management...
Adaptatio is a research project funded by the French Ministry of Ecology, managed by Morgane Colombert (EIVP) and involving several French partners — EIVP, EGIS Concept, CDC Climat, CSTB and the City of Paris. Adaptatio's role is to suggest a fresh methodology to consider the issue of adaptation to climate change during a design process of an urban planning project. It has become vital to consider...
This paper describes an investigation into possible reasons for the decrease in productivity (and hence an increase in the unit of energy consumed) from underground pneumatic rock drills during the past decade. Recorded figures have shown that the volume of air needed to produce one tone has increased by 2.6 times from 2002 to 2013. Similarly, compressed air energy used per ton has increased by 4...
In support of the electricity shortages of Eskom, an energy management project was undertaken by HVAC International at Rietfontein pump station. Before the start of the project the power-demand baseline indicated that an average potential peak time power savings of 3.2 MW could be achieved. These savings were comfortably achieved by installing new control equipment and automating/improving the control...
Mine Demand Side Management (DSM) projects are becoming increasingly expensive. In addition, some mining groups are cash-strapped due to reduced commodity prices and higher-than-inflation cost increases. This means that client funding for DSM projects is limited. Even with Eskom-IDM's financial contributions, DSM-projects must generate adequate and sustainable savings to ensure acceptable payback...
Load management projects are widely implemented in South Africa. Eskom Demand Side Management (DSM) endorses these projects as they aid in reducing Eskom's peak demand. There is also a cost benefit for participating entities billed on time of use (TOU) tariff structures. The continuous increase of electricity costs ensures that the financial impact of load management remains significant. This article...
This paper previews the literature on megaprojects contingency determination techniques. Project cost estimate has two components, the baseline estimate and contingency estimate. Sum of these two estimates forms an initial cost estimate for the project. Contingency cost is added to make provision for uncertainties. Final project cost often exceeds the initial cost estimate. Similarly, final project...
During their daily operations deep mines consume large amounts of electricity. One electricity intensive operation is the constant dewatering of a mining shaft. Dewatering is the fourth largest consumer of electricity in the gold mining sector. This creates the opportunity for financial cost savings on electrical energy consumed, if the correct procedures are followed. Previous interventions focussed...
The mining industry in South Africa is seriously looking for means to reduce its energy consumption due to the rising cost of electricity supplied by ESKOM. Due to the depth of the mines large volumes of chilled water are required at the work areas to ensure the working conditions are acceptable. This places a significant load on the pump and fridge plants available. This paper investigates ways to...
The cement and concrete industry in South Africa has been growing rapidly for the last couple of years. This is due to the development of the construction industry with its need in concrete products like: concrete pipes, culverts, manholes, slabs, piles, etc. Since the role of electric machines in the concrete industry is vital, this paper focuses on presenting the design of an energy efficient concrete...
Due to very effective media support the majority of people living in developed countries support the notion of using Renewable Energy in order to save the Environment from Global Warming. Developing nations generally cannot afford to commit themselves to a drastic energy switch (‘Energiewende’), abandoning coal as primary energy source or even gas or nuclear power. South Africa is blessed with large...
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