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Where to now ?
by Michael Rhode, AMEU President
 Those of us who were fortunate to be able to attend the recent AMEU Conference had the opportunity of hearing speakers offering advice on, and potential solutions to, the myriad facets of distributing electricity in the challenging environment in which we find ourselves. The advice came in all forms, shapes and sizes... ( more) |
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Camden power station return to service a world first
Information from Eskom
President Jacob Zuma officially opened the Camden Power station, which is the first in the world to be brought back on line after a lengthy period of inactivity, on 23 October 2010. This is part of Eskom's build programme, which includes building new stations and returning to service three decommissioned stations... ( more) |
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The Jacob Marley column: Waiting for prince charming
It is not polite to say "I told you so", but I remarked last month that it would be very difficult to pick the right answer from about 4-million different ones. And that's exactly what happened with IRP2010. The draft seems to have pleased no-one. While the nuclear pundits are over the moon with their share of the cake, there is a small detail missing from the answer - who is going to pay for it? And of course, don't mention the PBMR... (more) |
China and nuclear energy: Very human snapshots Part 2
by Chris Meyer, technical journalist
While some sources say Mao Zedong was responsible for even more deaths than Stalin (a recent book Mao: The unknown story gives the enormous figure of 70-million), the book "China builds the bomb" by Lewis and Litai focuses on another unknown story, the Chinese nuclear programme... (more) |
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Apples and oranges: Don't compare levelised cost of renewables
Information from EEnergy Informer
Alternative supply-side resources are typically compared based on their levelised costs, in cents/kWh. Even though an imperfect metric, it allows a simplistic way to compare. But is it an appropriate measure when comparing intermittent renewables?... (more)
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The effects of the "green revolution" - emissions reduction in diesel engines
Information from Cummins
The commitment to regulatory compliance, plus the aspiration to be seen as a "green" organisation, are driving a change in technology in the power generation industry. Diesel engines are becoming cleaner and greener... (more)
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Designing power factor correction equipment for economic returns
by Dale Pudney, High Voltage Technology SA
The market for power factor correction (PFC) equipment in SA has been driven by electricity tariffs related to power factor and reactive energy. As a result, the market for industrial and mining PFC has been very quiet, but this is expected to change as Eskom implements a "low power factor" charge from July 2011... (more)
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How capacitors affect harmonics, and what is resonance?
Information from Elspec
The use of power factor correction capacitors can result in resonance in circuits where harmonics are present. In order to understand the PFC capacitor affect on harmonic current,we need to understand the harmonic sources and their nature... (more) |
Eskom initiatives to support grid integration of renewable energy
by Mobolaji Bello, Dr. Clinton Carter-Brown, Shirley Salvoldi, Kevin Leask, Crescent Mushwana, Bernard Magoro and Nish Rathanlall, Eskom
The requirement to connect renewable generation to the grid presents technical and non-technical challenges. What are the current Eskom challenges regarding the grid integration of renewable energy? What plans are in place and what progress is being made by Eskom to address these challenges... ( more) |
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Energy conservation innovation
by E Tom Jauch, K C Fagen, R W Beck, Beckwith Electric
Reducing the average consumer voltage levels in the acceptable voltage range results in significant positive changes on the power system. The advanced capabilities of modern LTC transformer and regulator tapchanger controls, distribution capacitor bank controls and communication equipment allows... (more)
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An industrial energy efficiency case study in the steel industry
by Edith Kikonyogo and A Bosman, ABB South Africa
ABB's global consulting business was able to help a global steel producer to find circa R150-million in annual energy savings at one of its integrated steel mills, through the application of a structured industrial energy efficiency program... (more)
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Reducing unaccounted-for or non-revenue water
by John Alexander, Krohne
Changes in metering technology have shifted the focus to monitoring and management systems. It seems the heart of the management systems is being overlooked and a revisit to the heart is necessary to help reduce non-revenue water (NRW). A simple change can bring about a significant reduction in NRW... (more)
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Low power CFLs: A current issue?
by Pete Pomeroy and Stirling Marais,Cosine Development
Aside from reliability and disposal issues, the cumulative effect of many compact fluorescent lamps (CFLs) can cause problems. This paper explains how current distortion of typical mains rectification circuitry of CFLs causes more problems for the consumer than for Eskom, who simply have to shovel more coal... (more)
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