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Closing the gap: The lost 20%
by Brian Statham, SANEA
Over the past two decades the popular measures of sustainability have been decreasing in diversity and have become more narrowly focussed. It is not sufficient to compare two energy systems on the basis of relative carbon emissions and express an opinion on their desirability from a sustainability point of view... (more)
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Minister of small business must save small engineering firms
by Herman Mashaba, Free Market Foundation
A settlement reached this week demonstrates the staggering hypocrisy about the importance of small business to South Africa's economy. Everyone, it seems, believes passionately in nurturing small business. How, then, can this settlement have been welcomed by anyone who says they care about small business?... (more)
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Not all PV panels are created equal
by Jack Ward, Powermode
At the core of any solar PV system are its solar panels or "modules". Choosing an appropriate solar PV system to meet specific needs can be a technically challenging exercise particularly when it comes to matching off-take with system capacity demands... ( more)
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The Jacob Marley column: Closer ties
Sir, a recent front-page headline in a well-known business daily stated: "State set for tighter control of Eskom". The article referred to the newly appointed CEO reportedly telling Parliament that Eskom would be "more tightly controlled by the department in future"... (more)
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Energize Inbox, September 2014
from our readers
This month's letters respond to articles regarding nuclear's clash with the IRP; and carbon taxes... (more)
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This is part two of an article which discusses the implications for the United States and Europe of importing shale gas from cheaper sources; the possible re-emergence of the use of coal in these regions, and questions around the validity of the figures being projected... ( more)
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Hydrogen fuel cell power
by Mike Rycroft, EE Publishers
The recent announcement of the development of a mini-grid powered by a fuel cell-battery combination points to a new area of possible applications for fuel cells, which have to date primarily been used in standby applications... ( more)
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by FM Kangasala and G Atkinson-Hope, CPUT
Reduction in electrical energy consumption requires power utilities to employ most efficient ways of electrical energy delivery from generation to distribution infrastructures. For bulk power transfer over long distances improved transmission efficiency is a primary target to ensure less electrical energy losses and costs... ( more)
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SVC increases copper plant's production by 15%
by Dale Pudney, HVT Power Systems, and Adrian Lotter, Addata Networks
A 103 Mvar 22 kV static var compensator (SVC) installed on the 22 kV supply to a copper mine and production plant in the DRC has increased the plant production by about 15% by improving the voltage regulation of the supply... (more) |
Connecting a PV system to the grid and how to earth it
by Carel Ballack, Copper Alliance
A key constraint to the implementation of grid-connected small-scale renewable energy activities in South Africa is the lack of pre-approved, generic standards for utility engineers and system promoters to apply in designing and approving the utility interface... ( more)
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by Jerry Michaelson and Andreas Moglestue, ABB
Radiographic inspection saves costs and downtime and enables better maintenance planning. Ever since its discovery almost 120 years ago, radiography has both been both a source of fascination and a valuable tool... ( more)
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Protecting off-grid PV systems
by Mike Rycroft, EE Publishers
Many national wiring codes are beginning to include protection of PV systems, but the subject is neither well nor widely understood. This article covers the protection requirements for such solar PV systems, including the DC and the AC sections of the installation... ( more) |
Promoting energy access: meeting the challenge with cogeneration
Information from Schneider Electric
The International Energy Agency reports that nearly 1,3-billion people still lack access to electricity, and many of them live in sub-Saharan Africa. Households without access to electricity spend up to a third of their overall budget to buy energy. Microsol is a cogeneration solution for micro-industries in developing nations... (more)
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Benefits of continuous improvement in energy management
Information from Endress and Hauser
Using its own energy monitoring system, the company detected that the ventilation system of one of its buildings was using almost three times the energy of any other. As a result, it starting looking for a method of improving its energy saving and efficiency programme at its production centre... ( more) |
Industrial power and energy savings initiatives in South Africa
by Mike Rycroft, EE Publishers
The electricity crisis of 2008 resulted in numerous initiatives by government, the utility, industry associations and consumers, all aimed at reducing both the power demand on the grid and the overall consumption of electrical energy... (more)
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Compiled by Peter Adams, EE Publishers
Algeria develops solar capacity; Egypt to build new thermal plants; Inga could benefit from US fund; Kenya to build 50 MW solar; Largest wind farm in Africa; Nigeria's "home power stations"; Restructuring the Nigerian power supply; Tunisia focuses on renewables... (more)
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