coal-power-station

Let’s understand what R100 billion buys us when it comes to energy.   We will compare a coal fired power station with alternative solutions. Most people have no idea what R100 billion is and what it can buy.
Two years ago, R100 Billion bought one 5GW power station.   This power station requires about 8,000 people to build and about 1,000 people to run and several hundred more to supply it.   It requires 35 tons of coal every 15 seconds to run, needs coal mines, trucks, fuel to dig the mines, run the trucks, it requires roads to be built and serviced, ongoing maintenance, etc.  It also requires a huge amount of concrete to be poured. [And concrete as most of you know is the biggest source of pollution after converting coal into oil.

Let’s look at an alternative that can be easily understood.
R100 Billion is equal to 6,666,667 * R15,000 solar water heaters.
[Ie 10,000,000 * R10,000 = R100,000,000,000]
Assuming that there are 200 working days per year, then over 8 years there are 1600 working days.
Assuming we wish to install 10 million solar water heaters in 1600 days, we need to install 4,167 solar water heaters per day. This would mean that the entire suburb of Milnerton for example would get solar water heaters in one day.
Assuming a team of three people to install one solar water heater per day, we need 12,500 installers. Together with manufacturing, support, supply chain, maintenance, sales people, electricians, inspectors, this industry might permanently support double that number to reach 25,000 people.

And best of all it would replace 13 GW of power stations, ie it would need 13 GW of electricity to power 6,666,667 electrical water heaters, so it can be said that our money is at almost 3 times more efficient when spent on solar water than on electricity to heat water.

Figures and original article adapted and adjusted from comment by David Lipschitz; Published from Yes the Blog

eskom power lines

Eskom plans to reduce its dependency on coal over the next 20 years, says the chief executive at the power utility, Brian Dames.

He said the utility was planning to build five gigawatts of “cleaner coal” generation capacity after 2025, Business Report reported on Wednesday.

At present about 90% of Eskom’s electricity is generated through coal.

Dames said the government’s Integrated Resource Plan would bring coal’s share of generation down from 86% to below 50% over the next 20 years as the energy mix would be diversified to include nuclear, wind, solar, biomass and other sources.

“Eskom aspires to lead South Africa’s nuclear programme, in partnership, and to play a lead role in solar power,” said Dames who was speaking in Johannesburg on Tuesday.

Coal reduction was among the goals Eskom had set for itself as part of its new strategic direction.

It also plans to invest in more opportunities in southern Africa where there are potentially 200 million customers.

“Over the next few months, we will have a detailed business plan for the region. There are a lot of exciting opportunities in the region that we don’t have,” Dames said.

Opportunities had been identified in countries such as Botswana and Namibia and a business plan would be presented to the board in February.

He said the firm planned to build transmission networks and have the private sector handle the generation side.

Source – Timeslive.co.za

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A switch to wind energy will help reduce greenhouse gas emissions – and reduce the global warming they cause. But there’s a catch, says climate researcher Diandong Ren, a research scientist at the University of Texas at Austin in a paper appear in the AIP’s Journal of Renewable and Sustainable Energy: rising temperatures decrease wind speeds, making for less power bang for the wind turbine buck.

The prevailing winds in the “free” atmosphere about 1,000 meters above the ground are maintained by a temperature gradient that decreases toward the poles. “For example, Wichita, Kansas is cooler, in general, than Austin, Texas,” Ren says. “The stronger the temperature contrast, the stronger the wind.”

But as the climate changes and global temperatures rise, the temperature contrast between the lower latitudes and the poles decreases slightly, because polar regions tend to warm up faster. And as that temperature contrast becomes weaker, so too do the winds.

Wind turbines are powered by winds at lower altitudes – about 100 meters above the ground – where, Ren says, “frictional effects from local topography and landscapes further influence wind speed and direction. In

“my study, I assume that these effects are constant – like a constant filter – so wind speed changes in the free atmosphere are representative of that in the frictional layer.”

Ren calculates that a 2-4 degree Celsius increase in temperatures in Earth’s mid to high-latitudes would result in a 4-12 percent decrease in wind speeds in certain high northern latitudes.

This means, he says, that with “everything else being the same, we need to invest in more wind turbines to gain the same amount of energy. Wind energy will still be plentiful and wind energy still profitable, but we need to tap the energy source earlier” – before there is less to tap.

The article, “Effects of global warming on wind energy availability” by Diandong Ren appears in the Journal of Renewable and Sustainable Energy.

Source – winddaily.com

The draft twenty-year plan for electricity generation, also called the Integrated Resource Plan (IRP) 2010, was released a few weeks ago for public comment. The IRP process is all but a fait accompli. But what goes into the plan will determine the future of South Africa’s energy mix for the next two decades.
The energy choices available to us are between coal, nuclear, gas, hydro and other renewables.
With a projected GDP growth rate of 4.6% over the next 20 years, South Africa will need new capacity of about 52,000 megawatts (MW). Renewables will constitute 16% of the new technology mix to provide required electricity demand, while nuclear energy will provide 14% and coal 48%.
Why is an IRP important?
Well, energy or electricity is like blood running through the veins of an economy. Without it, our fledgling modern state would collapse. Never mind the myriad other things that are stalled without electricity, but crucially, without it, we would be unable to expand the economy and attract new investments, which in turn could limit the scope of job expansion.
The IRP process also tells us about how we think about energy-economy linkages, how we think of energy in relation to environmental and social justice issues, projections of future demand and how we use every unit of energy. At the heart of it, too, is the appropriateness of the energy mix.
Some are casting a close eye on the proportion of power generation that will come from coal, nuclear and renewables. There are lots of views about what should be included and excluded.
It at once also sums up the normative transitions we have made from the past to the present when thinking about energy. At once, all the country’s vices and virtues are nestling their way into the IRP process itself.
The IRP, which is so crucial to South Africa’s economic future, is a process run by a few experts within the state and some major users like mining companies. It is observed by ‘outsiders’ such as policy wonks, industry lobbyists, energy experts in policy think tanks, universities and civil society activists.
But in the end, it literally amounts to a few people making profound decisions on behalf of the majority.
Hearings on the IRP 2010 will be held sometime – in different provinces – at the end of November running into early December. The interest in the new plan from consumers, civic groups, business, unions, financiers and international investors is overwhelming.
You are, after-all, talking about throwing another large chunk of new taxpayers money beyond the current infrastructure projects already earmarked by the state at a new set of infrastructure projects.
How does the IRP process work?
The plan lays the basis for Eskom to submit an application to the National Electricity Regulator (NERSA) to permit it to go ahead with the financing of new power projects or the purchase of power from private generators.
In other-words, NERSA approves a tariff that would accommodate the cost of building the new power infrastructure. The tariff seeks to reflect the true cost of electricity generation. Once a tariff has been approved these costs can be recouped from consumers. Eskom can then go and raise additional funds to build the power stations it needs or procure power from private generators of electricity.
The current plan, while still in an initial state, has some good, but also worrying things about it.
The first positive thing is that we have actually have embarked on a planning process for electricity. It is the first time that this is being done in South Africa and this in itself sets a good precedent. It is a process we can learn from and build on in the future.
The second good aspect of the plan is a tacit admission that coal’s future looks slim. The share of coal as a major source of electricity generation for the future is declining.
The main reason, despite the claim that we have 200 years of coal (which is proving to be untrue given recent coal estimates), is that any new sources of coal have an inherent insecurity in them because of question marks about the quality of the coal and the unpredictability of the future price. This situation is worsened by the fact that we may not have the infrastructure in place in time to dig out enough coal from the ground to supply demanding and hungry coal-fired power stations.
Eskom and SASOL have at least acknowledged that coal, as a generous energy feedstock, is constrained. Thus, the golden days for coal are over.
The third good thing about the IRP is that this is the first plan to be literally operating with a carbon budget in mind. Some may argue it does not go far enough. But the fact that ‘reducing our carbon emissions’ is chosen as a parameter for consideration, is a major conceptual breakthrough for energy planning and electricity generation in South Africa. It has never been done like this before.
However, as much as it is convenient to have a carbon budget approach and ratchet up the numbers on renewables to support a low carbon path, it also serves as a justification and a way to sneak in nuclear energy as a low carbon solution. No doubt there will be furious debate on the inclusion of nuclear.
The diminishing prominence of coal-fired power also has other reasons attached to it. Any new financing, at least from the Western World that has carbon reduction as a goal, will not be easily forthcoming for coal plants. Soft finance will be more readily available for renewables and to some extent for nuclear.
The fourth positive aspect relates to drawing power from other sources in the Southern African region – mostly in the form of small and some large hydropower opportunities. South Africa’s demand for power could stimulate more investment in hydro projects in the region. The amount of hydropower that will be drawn will be close to 3,300MW. This is almost equivalent to one coal-fired power station.
As other countries in the region become more stable this share of power from the region can increase.
But there are also weaknesses in the plan. The plan still adopts the “old school” way of thinking about electricity, which is etched through its fabric of scenarios and assumptions. In this way, it is very supply side orientated.
Thus, while the IRP takes a ‘least cost’ approach for supply solutions, it does not do so for demand management.
Compared to a lot of modern economies South Africa does not score too well on energy efficiency and the new electricity plan is quite meek in its ambitions for energy efficiency.
We need an economy in which participants use less for more and in which economic planners shift to sectors that are diversified away from energy intensive industries towards low energy sectors that produce higher economic value.
Yet the IRP covers very little about how we can reduce South Africa’s energy intensity, especially, with respect to collective behavioural change and a unified vision for a new type of economy.
The plan seems to exude deep scepticism about our ability to shift behaviour and relies on engineering solutions rather than a values approach that can alter future demand patterns for the consumption of electricity.
The fact that there are interesting numbers in the plan for different types of technologies does not mean it will be executable. The new build – as it is sometimes described – will require R800bn of additional funding. The cost of electricity will rise from 40c/kWh to about R1.10/kWh. This is a 275% cost rise for electricity generation within the next ten years.
This has profound implications for how much of the plan’s vision can be achieved.
In the meantime, existing plans to build two new coal-fired power stations will go ahead. A portion of renewables like wind energy could be slotted in expediently because we are desperate for quick wins in the next five years to avoid load shedding.
The call on a fleet of nuclear power stations is still to be made. It is not as yet a done deal. Too much spend on nuclear may well squeeze out a higher generation target for renewables – what economist call the “crowding out” effect.
What is executable will also be encumbered by the governing realities of our politics and economy. Without a radical solution, the status quo remains in place and some vested interests will continue to prevail.
The IRP 2010 will no doubt be a plan that will be intensely fought over because undergirding it all will be a contest to assert different visions for our energy future and economy.
However, despite the IRP 2010 being seeped in technocratic language, it is, after all, a plan about our future that must be driven by what values we posit for that future. Getting there in unified way is no small task. Either we build consensus organically or the state manufactures consensus.

Source – Fakir is an independent writer based in Cape Town.

joule

South Africa, which builds BMWs and Mercedes Benzes for the US market, is in the thick of the race to deliver a truly practical – and stylish – electric car. Meet the Joule.

The battery-operated six-seater was designed by local boy Keith Helfet, an internationally distinguished vehicle designer who, before opening his own consultancy, was a key designer at Jaguar.

He was brought on board by mechanical engineer Kobus Meiring, CEO of the Joule’s Cape Town-based manufacturer Optimal Energy.   Something of a legend in engineering circles, Meiring helped develop South Africa’s Rooivalk attack helicopter, and later project managed the Southern African Large Telescope, which was completed on budget and on time.

The Joule debuted at the Paris Motor Show in October 2008 and has since received a facelift at the Milan-based Zagato Total Design Centre. It will comply fully with global safety standards, and Optimal is aiming for a five-star rating from the Euro New Car Assessment Programme.

The Joule’s prototype phase is now complete, and the necessary modifications made. But before the commercial version hits the streets, further refinements and feedback from consumers and the media will be incorporated into a test fleet, which will be hand-built, like the prototype, by Hi-Tech Automotive in Port Elizabeth, in the Eastern Cape province.

The Joule is expected to go into full-scale production at the end of 2013, to appear on showroom floors in mid-2014. The car’s South African price will be somewhere between $32 300 (R220 800) and $39 000 (R266 600) in today’s terms, and export is also on the cards.

The car is made of eco-friendly materials with a local content of at least 50%. It will also feature a roof-mounted solar panel as an option.

Optimal maintains that charging the Joule will not place an extra strain on South Africa’s sometimes-fragile national electricity grid. The plan is for Joules to plug in to charge at night, as local utility Eskom has extra capacity between 11pm and 6am.

With its battery range of around 300km, regenerative brake system, fewer moving parts and zero engine emission, the Joule is set to change the way South Africans drive.

Source: www.mediaclubsouthafrica.com
We at www.waterandsolar.co.za want South Africa to start seriously looking now at renewable energy and reduce its need for coal fired power stations.  As individuals we can start in our homes by switching to solar water heaters, introducing a greener way of living with greywater systems and rainwater harvesting.  Together we can start reducing our homes carbon footprint and our need for coal hungry Eskom.

Green energy project george
George Municipality could be the first municipality in South Africa to buy privately generated electricity. The news was revealed at a site inspection on 25 October 2010 of the R200-million green energy to electricity project, between the state owned Central Energy Fund (CEF), Carbon & Environmental Options (C&EO) and other stakeholders.
In the Picture – Ms Busi Mabuza – CEF Group Chairperson, Karel Siegel, MBH Executive; Dr Phindile Masangane – Project Manager CEF and Mr Mputumi Damane – CEF Group CEO with some of the equipment for the proposed green energy to electricity project.
According to CEF project manager Dr Phindile Masangane, the plant will produce a maximum of 8.8 megawatts  electricity (MWe) and could export a maximum of 7.5 MWe into George’s electricity grid by 2012. This would provide George with about 10 percent of its electricity requirements.
George Municipality will not be making a capital investment in the plant as it will be funded by CEF and its partners.
George Executive Deputy Mayor Lionel Esau, councillors and the electro-technical department paid a visit to the site with Dr Masangane,  CEF chairman Busi Mabuza, chief executive Mputumi Damane and MBH Energy executive Karl Siegal to inspect equipment that has been imported from India.
MBH Energy will build the air-cooled power island that will convert the green waste to electricity.
The plant requires 110 000 tonnes of green waste, such as forest and sawmill waste, woodchips, bark and sawdust to generate the required electricity per annum.  Siegel said the waste would be burnt in a boiler which would generate 4 000 tons of steam that would then turn the turbine that powers the alternator to produce the  electricity.
Masangane said that 75% of the main equipment is already on site, which stands on the former Sonae Novabord property in George Industria.
Construction of the plant could start in August 2011 and if plans go according to schedule, the plant could be commissioned within nine months.
Source – George Municipality

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Top: Scanning electron microscopy image and zoom of conjugated polymer (PPV) honeycomb. Bottom (left-to-right): Confocal fluorescence lifetime images of conjugated honeycomb, of polymer/fullerene honeycomb double layer and of polymer/fullerene honeycomb blend. Efficient charge transfer within the whole framework is observed in the case of polymer/fullerene honeycomb blend as a dramatic reduction in the fluorescence lifetime.

Scientists at the U.S. Department of Energy’s (DOE) Brookhaven National Laboratory and Los Alamos National Laboratory have fabricated transparent thin films capable of absorbing light and generating electric charge over a relatively large area. The material, described in the journal Chemistry of Materials, could be used to develop transparent solar panels or even windows that absorb solar energy to generate electricity.

The material consists of a semiconducting polymer doped with carbon-rich fullerenes. Under carefully controlled conditions, the material self-assembles to form a reproducible pattern of micron-size hexagon-shaped cells over a relatively large area (up to several millimeters).

“Though such honeycomb-patterned thin films have previously been made using conventional polymers like polystyrene, this is the first report of such a material that blends semiconductors and fullerenes to absorb light and efficiently generate charge and charge separation,” said lead scientist Mircea Cotlet, a physical chemist at Brookhaven’s Center for Functional Nanomaterials (CFN).

Furthermore, the material remains largely transparent because the polymer chains pack densely only at the edges of the hexagons, while remaining loosely packed and spread very thin across the centers. “The densely packed edges strongly absorb light and may also facilitate conducting electricity,” Cotlet explained, “while the centers do not absorb much light and are relatively transparent.”

“Combining these traits and achieving large-scale patterning could enable a wide range of practical applications, such as energy-generating solar windows, transparent solar panels, and new kinds of optical displays,” said co-author Zhihua Xu, a materials scientist at the CFN.

“Imagine a house with windows made of this kind of material, which, combined with a solar roof, would cut its electricity costs significantly. This is pretty exciting,” Cotlet said.

The scientists fabricated the honeycomb thin films by creating a flow of micrometer-size water droplets across a thin layer of the polymer/fullerene blend solution. These water droplets self-assembled into large arrays within the polymer solution. As the solvent completely evaporates, the polymer forms a hexagonal honeycomb pattern over a large area.

“This is a cost-effective method, with potential to be scaled up from the laboratory to industrial-scale production,” Xu said.

The scientists verified the uniformity of the honeycomb structure with various scanning probe and electron microscopy techniques, and tested the optical properties and charge generation at various parts of the honeycomb structure (edges, centers, and nodes where individual cells connect) using time-resolved confocal fluorescence microscopy.

The scientists also found that the degree of polymer packing was determined by the rate of solvent evaporation, which in turn determines the rate of charge transport through the material.

“The slower the solvent evaporates, the more tightly packed the polymer, and the better the charge transport,” Cotlet said.

“Our work provides a deeper understanding of the optical properties of the honeycomb structure. The next step will be to use these honeycomb thin films to fabricate transparent and flexible organic solar cells and other devices,” he said.

The research was supported at Los Alamos by the DOE Office of Science. The work was also carried out in part at the CFN and the Center for Integrated Nanotechnologies Gateway to Los Alamos facility. The Brookhaven team included Mircea Cotlet, Zhihua Xu, and Ranjith Krishna Pai. Collaborators from Los Alamos include Hsing-Lin Wang and Hsinhan Tsai, who are both users of the CFN facilities at Brookhaven, Andrew Dattelbaum from the Center for Integrated Nanotechnologies Gateway to Los Alamos facility, and project leader Andrew Shreve of the Materials Physics and Applications Division.

Source – solardaily.com

A new initiative to promote renewable energy and the green economy in the Western Cape was launched in Cape Town on Friday.

The GreenCape initiative is a government-funded, industry-led initiative to support the development of renewable energy in the province.

Western Cape Minister of Finance, Economic Development & Tourism Alan Winde said at a media briefing that the provincial government wanted to go from “talk to action”. The initiative had been mandated with the roll-out of a comprehensive green economy strategy.

He said that the provincial government provided R5-million to kick-start projects in the sector.

“This initiative is supported by each and every member of the Cabinet, including the premier. We are building a new sector in this province, and from it, we will achieve significant growth and jobs”, said Winde.

He stated that the Western Cape had set itself a target to achieve a 15% shift to renewable energy generation by 2014.

This had the potential to create 20 000 jobs and attract R45-billion worth of investment into the province over the next ten years.

The GreenCape initiative had been established to facilitate the achievement of the target and growth of the province’s renewable energy sector.

Dr Francois du Plessis has been appointed the CEO of GreenCape.

Speaking at a renewable energy and green economy conference in Cape Town on Friday, Du Plessis said that the objective of the initiative was to ensure that the Western Cape was at the forefront of green technology.

Its primary goals in its first two years of operation would be to become the ‘shop window’ for the sector and to promote the transition of the Western Cape economy to greater resource efficiency and a low-carbon future. It would also seek to build manufacturing capabilities in the province and to create new jobs.

“I will be held accountable for removing barriers to green business,” added Du Plessis.

GreenCape would have 15 board members, which would report to Winde.

The initiative would focus its attention on six priority areas through the use of sub-committees including, wind, solar water heaters, bio-energy, skills, policy and incubation.

Du Plessis added that the Western Cape had several competitive advantages in the renewable energy sectors. The province had two-thirds of South Africa’s wind resources and had good solar and biomass potential, the province had four tertiary institutions, and it had a diversified manufacturing base.

Source – Engineeringnews.co.za

solar park

The World Bank’s Clean Technology Fund plans to invest $85 million in renewable energy and co-generation projects in South Africa.

The fund said it had $50 million available for wind and solar renewable energy projects and $35 million for co-generation, where waste energy and gases are used to produce power according to an advert in the Business Day.

The $85 million was part of a total $150 million allocated for investment in South Africa, with the remainder being managed by the African Development Bank.

South Africa’s state-owned power utility Eskom has said it will conduct more research in clean technology as it seeks a new World Bank loan to finance renewable energy power projects.

The World Bank in April approved a controversial $3,75 billion Eskom loan to develop a coal-fired power plant in South Africa despite the lack of support from the country’s key Western allies.

Source – The Times

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Wheelock adds that with the cost of production still a key obstacle to widespread production, many companies are refocusing production efforts on low-volume, high-value co-products to develop revenue streams over the next decade.

In the face of petroleum scarcity, increasing oil prices, market volatility, and climate change, leaders in government and industry are looking to renewable fuel sources such as algae-based biofuels to reduce expenses and mitigate their acute vulnerability to petroleum supply chains.

Yielding 2 to 20 times more oil per acre than leading oilseed crops, algae’s productivity and scalability are seen as its greatest advantages, and a number of key industry players are gearing up their operations to meet the opportunity.

Algae biofuels have the added advantage of utilizing non food-based feedstock, with the abilities to grow on non-arable land and utilize a wide variety of water resources including wastewater and seawater.

According to a new report from Pike Research, algae biofuels production will grow rapidly over the next decade, reaching 61 million gallons per year and a market value of $1.3 billion by 2020. While barely a drop in the bucket for biofuels, this represents a compound annual growth rate (CAGR) of 72%, roughly on par with early development in the biodiesel industry.

“On paper, algae could displace worldwide petroleum use altogether, however, the industry has yet to produce a drop of oil for commercial production,” says Pike Research president Clint Wheelock.

“Although the algae-based biofuels market will grow rapidly once key cost hurdles are overcome, widespread scale-up will be hampered by a number of difficult challenges including access to nutrients, water, and private capital.”

Wheelock adds that with the cost of production still a key obstacle to widespread production, many companies are refocusing production efforts on low-volume, high-value co-products to develop revenue streams over the next decade.

Pike Research anticipates that, with 50% of all algae activity, the United States is poised to ramp up production the earliest among world markets. Pilot- and demonstration-scale facilities are beginning to break ground across the country.

The European Union (EU) market, which is home to about 30% of algae activity, will be limited initially by the industry’s focus on university research, and later by insufficient access to water, land, and nutrient sources. Latin America and Asia Pacific, which are home to fewer projects in operation today, are set to gain significant market share in the long run.

Pike Research’s study, “Algae-Based Biofuels”, examines the key growth drivers behind the algae-based biofuels market and outlines unresolved supply challenges.

It compares advantages and disadvantages of algae production pathways, leading cultivation technologies, and end-market opportunities. The report includes detailed 10-year market forecasts, segmented by world region, along with analysis of market conditions in key countries and profiles of key industry players that are shaping the emerging algae biofuels business.

Source – biofueldaily.com

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