You are currently browsing the tag archive for the ‘renewable energy’ tag.

In recent years, the integration of renewable energy sources (RES) on electricity power systems across the world has increased considerably. According to most estimates, this development is set to increase even further over the coming decades, and the majority of this increase is expected to be from variable non-synchronous renewable (VNSR) generation. This fluctuating energy will alter the fundamental behaviour of power systems and introduce new challenges… (more)

Advertisements

“Is Chernobyl dead? Essays on energy – renewable and nuclear” by CM Meyer is a fascinating new book, breathtaking in its scope and gripping in its coverage. The 302-page book has 51 easy-to-read chapters (essays), each one essentially self-contained and extensively referenced, woven together to form the whole. There are also over 100 figures and pictures, many of them rare and retrieved from international archives, with significant historical interest… (more)

The past few years have seen a considerable increase in the integration of renewable energy sources (RES) on electricity power systems worldwide. RES integration is set to grow in the coming decades, and experts expect most of the increase to be from variable non-synchronous renewable (VNSR) generation… (more)

Electricity production constitutes a key factor in the development of any nation. Use of coal, oil or gas for electricity production has been identified as contributor to environmental pollution and climate change. Hence, the need to produce electricity from renewable energy sources that impact less negatively on the environment… (more)

A significant milestone for renewable energy in South Africa was reached on 29 October 2012 when the minister of energy, Dipuo Peters, announced financial closure for some 1425 MW of renewable energy projects for the first bid window of the renewable energy independent power producer procurement programme… (more)

The renewable energy industry has experienced a laborious process with many course changes and reversals by government, NERSA and Eskom during the past several years. This paper discusses the relationship of this newly established South African Smart Grid Initiative and the renewable energy bid (REBID) programme… (more)

Although renewable energy from solar and wind is becoming more affordable and available, it is still dependent on the sunshine or the wind and may therefore vary both minute to minute and over longer time periods. Batteries are still a good solution to this problem for small systems, but from a utility point of view, a buffer system which could make solar and wind energy dispatchable would be desirable… (more)

Small-scale renewable energy solutions, produced from zero or low carbon source technologies and derived from naturally regenerative or practically inexhaustible resources, are the latest addition to the list of energy efficient technologies funded through Eskom’s Standard Offer Programme… (more)

“Today, no trace of the electrolysis building remains at Vemork. Visitors find it hard to believe a towering eight story glass-steel-and concrete  building, plus a score of other houses and structures, once hugged the sloping, narrow ledge on the south side of the Vestfjord valley”… (more)

South Africa has a high level of renewable energy potential, and presently has in place a target of 10 000 GWh of renewable energy. The minister has determined that 3725 MW to be generated from renewable energy sources is required to ensure the continued uninterrupted supply of electricity… (more)

The Alstom Chair in Clean Energy Systems Technology (ACCEST) was inaugurated on 1 December 2011at the University of the Witwatersrand, through a partnership, which will see Alstom investing over R17- million in various projects at the University between 2009 and 2016. The Chair will address the technology of electricity generation and transmission of South Africa, recognising the need for growth and environmental sustainability… (more)

Cutting down carbon emissions has become a growing concern for policy makers, car manufacturers, and building designers in our present world. Consequently, batteries as energy storage devices have taken the centre stage in the search for alternative sources of energy and development of low-cost hybrid electric vehicles… (more)

This year has seen numerous changes and new developments in the power generation industry, some dramatic and others more subtle but just as important. The changes seem to be associated with changes in terminology, and new terms seem to be popping up as regularly as new developments in the industry. The most dramatic change occurred in the renewable energy sector, where REFIT was replace with REBID, a change in more than name which seems to have galvanised the process into action. The question now remains how will the renewable energy fleet perform?… (more)

At a meeting of the South African Independent Power Producers Association (SAIPPA) on Wednesday 30 November 2011, Karen Breytenbach of the National Treasury of South Africa announced that the first bidding window of the first tranche of renewable energy generation had been 57% subscribed, with a total of 53 bids received for some 2127 MW of renewable energy (RE) generation capacity with a value of R64-billion… (more)

Always a long shot, and not getting any better. With 104 operating reactors supplying a fifth of the country’s electricity needs, US has more nuclear power plants than any other country. For some time, the official policy has been that more would be better. Yet despite the government’s best intentions and generous loan guarantees, no one has ordered a new reactor for over three decades. In the meantime, the existing fleet is aging and life extensions are merely delaying the eventual day of reckoning… (more)

A Spanish island in the Atlantic Ocean is set to become the first island in the world to be powered solely by renewable energy. The $87-million project will provide electricity for the island’s 11 000 inhabitants using a combination of wind power and pumped water storage. ABB power and automation technologies are playing a leading role… (more)

Eskom and the African Development Bank (AfDB) have signed two loan agreements for a total value of $365-million that will enable the first large-scale implementation of renewable wind and solar generation in Eskom’s history. The loans consist of $265-million from the AfDB’s own resources and $100-million from the resources of the Clean Technology Fund… (more)

On 23 August 2011, EE Publishers hosted an open panel discussion and debate in Midrand, entitled “Renewable Energy in South Africa – going backwards or forwards?” The presenters at the panel discussion and debate, key players in the renewable energy (RE) sector of South Africa covered the background on where the country finds itself now, as well as the road ahead in the implementation of the ambitious RE targets detailed in the national integrated resource plan for electricity, IRP 2010 – 2030… (more)

Energy storage has played a relatively minor  role in the power system, but as intermittent renewable resources, distributed generation, and advanced technologies transform the traditional power grid, storage may become a key enabler of the low-carbon, smart power grid of the future… (more)

by Chris Yelland, EE Publishers

On 23 August 2011, EE Publishers hosted an open panel discussion and debate in Midrand, entitled “Renewable Energy in South Africa – going backwards or forwards?” At the debate, key players in the renewable energy (RE) sector of South Africa covered the background on where the country finds itself now, as well as the road ahead in the implementation of the ambitious renewable energy targets detailed in the national integrated resource plan for electricity, IRP 2010 – 2030. This will involve the installation of some 9200 MW of wind generation capacity, 8400 MW of solar photo-voltaic (PV) capacity, and 1200 MW of concentrating solar plant (CSP) capacity by 2030… (more)

South Africa is still facing the problem of insufficient power generation capacity and a reserve margin which is below international accepted levels. The government is in the approval process for the new IRP 2010 which is considering renewable energy technologies as clean sources of energy that have a significantly lower environmental impact than conventional energy technologies. The IRP 2010 is indicating a greater role in the energy for renewable energy technologies… (more)

Combined cycle operation eases the integration of renewables on the grid. According to the International Energy Agency (IEA), gas is expected to play a key role in meeting the world’s energy needs with a projected demand rise of 44% between now and 2035, led by China and Middle East… (more)

The South African Wind Energy Association (SAWEA) are looking forward to the national energy regulator’s imminent announcement of the revised renewable energy feed-in tariffs and see this as a positive step in the implementation of renewable energy in South Africa. However, SAWEA are concerned that the Department of Energy’s intention to pursue a competitive bidding process for the first rounds of South Africa’s renewable energy procurement could adversely affect investor confidence and destroy South Africa’s nascent renewable energy industry… (more)

The exploitation of renewable energy from solar and wind has been likened to the new gold rush. SA has probably the biggest unexploited goldfield in the form of solar energy in the world, and there is a rush to benefit from this new bonanza…. (more)

by Mark Botha and Chris Yelland, EE Publishers

The debate around hydraulic fracturing in the Karoo is an issue of national and public interest. Shale gas extraction has the potential, some say, to change the face of the country’s power industry and improve the lives of millions of South Africans. Public opinion, however, is a powerful force well-known to have hampered the nuclear industry in the past… (more)

The Treasury has announced it’s proposal to introduce a “carbon tax”, with the stated aim of reducing CO2 dioxide emmissions and facilitating the move to a “low carbon” future. The nature of the power generation industry in South Africa is such that neither financial incentives or penalties, such as taxes, can have any effect on the utility and how it generates power, and implementing the proposal will result in just another tax… (more)

At long last, the cabinet has approved and published the national Integrated Resource Plan for Electricity, IRP 2010. Now this just has to be passed by parliament and published in the Government Gazette. Let’s hope there will not be further delays, and that a measure of certainty will prevail so that the electricity sector can get down to work. But what is IRP 2010? Why is it important? And what exactly does it say?… (more)

by Chris Yelland, managing director, EE Publishers

At long last, the cabinet has approved and published the national Integrated Resource Plan for Electricity, IRP 2010. Now this just has to be passed by parliament and published in the Government Gazette. Let’s hope there will not be further delays, and that a measure of certainty will prevail so that the electricity sector can get down to work. But what is IRP 2010? Why is it important? And what exactly does it say?… (more)

The IRP 2010 20 year electricity capacity plan is crucial towards determining South Africa’s long-term electricity demand, as well as how this demand should be met in terms of generating capacity, type, timing and cost.  At current projected GDP rates, South Africa is looking at another 120 – 140 years of coal consumption, which is twice as long as uranium will last. Within the next 150 years, or at least within the next 80 years, renewable energies will need a substantial investment in order to meet electricity demand and pick up the eventual shortfall of uranium and coal… (more)

There is a move towards introducing renewable energy (RE) sources into the South African energy mix. At present developers of RE generation projects do not have a clear idea of the available capacity for connection of projects to the transmission network. To address this situation a study was undertaken to determine the available connection capacity for new generation at the different MTS substations. This article gives a brief summary of the results of the study… (move)

It is not only essential that we begin transforming the way we use energy, but it is also important to ensure a reliable supply. As in any industry, proper lubrication is key in ensuring a smooth operation, and in keeping costs to a minimum. The worse stance one can take is that spending money on lubrication systems is simply another overhead cost. From this viewpoint, lubrication should be minimized to help the organization survive in today’s global economic situation. It is therefore imperative to note that proper lubrication is a savings and not a cost… (more)

The sustainable energy sector in South Africa is a slumbering giant about to be roused. The era of cheap and abundant coal-generated power has made way to a new age of sustainability – natural resources and human resourcefulness have become the most valued commodities in our endeavour to generate the power needed to sustain the economy and our rapidly developing country. And we must do this in such a way that future generations will inherit security of supply and sustainable sources of energy… (more)

2008’s load shedding crisis caused many South African consumers to rush out to purchase generators, and importers could not keep up with the demand. But did consumers consider the implications of their expensive generator investments?  If you thought your generator was the solution, think again. If you have a 10 kW generator and you use it to power a few lights and the television, you are only using 4 kW. 6 kW is being wasted. This is costly and wasteful… (more)

Inverters are an essential component of solar photovoltaic systems. Locally developed and manufactured products are available that cover the range from small systems of several kW to large installations in the MW range. With the recent advent of cheaper solar photovoltaics (PV) and the rapid increase in cost of grid power a new urban market rapidly evolved where customers connected to the grid sought to introduce renewable energy… (more)

As we reach the end of 2010 many will be sitting back and reflecting on a year in which much has been achieved. As people raise their glasses at the turn of the year there will be those who feel they are half-full and those who feel they are half-empty; but most will not be dry. But what of the forgotten millions… (more)

A mast standing 56 m tall is playing a vital role in bridging the digital divide, by bringing much-needed communication through connectivity to a remote community on the banks of the Orange River in the Northern Cape.  Riemvasmaak, situated 120 km west of Upington, has joined the global village thanks to an off-grid base station erected by MTN South Africa… (more)

The use of renewable energy sources is one of the key issues when it comes to creating a new basis for worldwide energy supply. Wind power has been in use for over 20 years now, with technical advances in this area leading to improvements in efficiency and reliability… (more)

by Mike Rycroft, editor of Energize

This article was first published in Critical Thinking Forum, a supplement to the Mail & Guardian, www.mg.co.za.

Three announcements in the last few weeks have created new hope that the long-awaited renewable energy (RE) programme will get underway, namely: the request-for-information on renewable energy projects from the Department of Energy (DoE); the announcement by the minister of energy of the establishment of a solar park in the Upington area; and the release of the draft integrated resource plan for electricity (IRP2010) for public comment… (more)

September 1 has come and gone, and the latest news is that the promised public discussion of the IRP2 will be delayed “for a few weeks”. How long this will be is unknown but is another source of frustration for those who have been preparing for this event. The big question around the IRP 2010 is not so much the long term plans, but the short term, particularly the amount of renewable energy which will be contained in the portfolio… (more)

I am surprised at the negative tone expressed towards diversified energy, carbon emission caps and renewable energy by Dr. Philip Lloyd in “An energy crisis or not?” He expresses that “diversity of energy resources is a luxury you can afford if you have enough.”… (more)

Policy supporting the inclusion of embedded generation in the future generation mix in South Africa implies that the number of generators connected to networks will increase significantly. Embedded generators introduce a new paradigm in the electric power industry and change some of the assumptions on which networks have been designed and operated, particularly with respect to voltage control and protection. What are the impacts of embedded generation on the distribution networks? How can they be counteracted?…  (more)

Alternative energy, renewable energy, green energy, clean energy, free energy etc. All names for the same thing. All reflecting the idea of a limitless source of energy which only has to be harvested. Off-grid renewable energy systems have proved their ability to provide reliable power at an economic cost over many years of operation. Grid connected systems however present a totally different situation… ( more)

Energy in South Africa has typically been inexpensive and plentiful. However, recent power outages have underscored the country’s growing energy requirements and demonstrated the need to focus attention on alternative energy sources. Globally, countries are looking toward renewable energy as a cleaner alternative. Adding renewable energy to the pan-African energy mix could be one of the answers to its power supply challenge… (more)

The use of renewable energy sources is one of the key issues when it comes to creating a new basis for worldwide energy supply. Wind power has been in use for over 20 years now, with technical advances in this area leading to improvements in efficiency and reliability. The output of wind power units is steadily increasing (more)

As we talk about the next great Energy Technology, we usually think of wind turbines, solar, energy storage, electric transportation, or other renewable energy technologies.  But we must also recognize the important role that information technology has in bringing all of these innovations to scale… (more)

As natural fossil fuel resources are rapidly depleting and energy costs ever increasing, it is critical for South Africa to address the use of biofuels to supplement the energy sources currently being used. Brazil has managed very successfully to turn waste from the sugar harvesting process (bagasse) into energy… (more)

2010 is the start of a new decade, and the future suddenly looks a lot closer. For instance 2012, the original scheduled date for completion of the first unit at Medupi Power station is only two years away. 2013, the date by which we are destined to have 10 000 GWh of renewable energy generation is only three years away, and 2015 is only five. Ambitious plans need to be made in the next few years if the promises of this decade are to be met… (more)

Baseload coal-fired plants have been designed for consistent, round-the-clock operation at full load. But today’s low natural gas prices and increased dispatch of intermittent renewable generation are encouraging the use of baseload plants for cycling duty, which can lead to component damage and reliability problems. EPRI is working with member utilities on an integrated framework of analysis, operating strategies, and design modifications that will help minimise these impacts… (more)

The renewable energy industry forms part of a greater social contract, a contract between all members of society. The contract entails the move from unsustainable energy sources, to renewable energy sources – at a rate commensurate with the (reasonable) cost and sustainability of this energy source migration. This industry should not become or be monopolised by governments, parastatals or even large private entities – for the purposes of becoming a cash-cow. Policy, ideally, should ultimately empower individuals to become self-sufficient in providing for their own energy needs – after all, we all own a little piece of sunshine… (more)

The ISES Solar World Congress 2009 hosted by the Sustainable Energy Society of Southern Africa in Johannesburg, South Africa, attended by participants from all over the world resolved that the global target of 100% renewable energies is both attainable and necessary by the middle of the current century.This is motivated on grounds of ecological, economic and social sustainability. The unacceptable backlog in energy supply in the third world countries can only be covered cost effectively and in time by the use of renewable energies. Especially the industrialised countries have to increase their efforts in transitioning to renewable energies… (more)

Share this blog page

Bookmark and Share

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 49 other followers

EE Publishers

Blog calendar

October 2017
M T W T F S S
« Jan    
 1
2345678
9101112131415
16171819202122
23242526272829
3031  

RSS EE Publishers on Twitter

  • An error has occurred; the feed is probably down. Try again later.