Home » Posts tagged 'electricity generation' (Page 2)
Tag Archives: electricity generation
Wake up, Donald et al.! According to the Guardian of 6 January 2017,
China now owned:
- Five of the world’s six largest solar-module manufacturing firms
- The largest wind-turbine manufacturer
- The world’s largest lithium ion manufacturer
- The world’s largest electricity utility
“At the moment China is leaving everyone behind and has a real first-mover and scale advantage, which will be exacerbated if countries such as the US, UK and Australia continue to apply the brakes to clean energy,” he said.
“The US is already slipping well behind China in the race to secure a larger share of the booming clean energy market. With the incoming administration talking up coal and gas, prospective domestic policy changes don’t bode well,” Buckley said.
Salar de Uyuni in Southwest Bolivia contains an estimated 43 % of the world’s easily recoverable lithium. Together with neighbors Chile and Argentina, the three countries contain 70% of the planet’s reserves. As most people are aware by now, the renewables revolution is gathering momentum, and the world needs lithium, lots of it. The people who follow these trends estimate that Tesla’s Gigafactory alone, when it comes into production, will double world demand for lithium, whose prices have shot up just in the last two months of 2015 (from US$ 6500 to 13,000 a ton in November/December). American, Japanese, Chinese and South Korean companies are already mining around 170,000 tons of lithium worldwide. The Argentinian salares, or salt flats, comprise thousands of square miles in the provinces of Catamarca, Jujuy and Salta. The Salinas Grandes in the latter province is estimated to be the third largest in the world. But the grand-daddy of them all is the Salar de Uyuni in Bolivia that stretches over 10,000 sq.km. To paraphrase Exupéry, Salar de Uyuni is made up of salt, salt salt, and more salt, to a depth of one meter or more. In addition to common salt (sodium chloride), the salars contain other useful chlorides; potassium, magnesium and lithium chloride. The estimated 9 millions tons of lithium contained in this salar, conveniently concentrated by natural evaporation, should be enough to power a global energy revolution or two, but at what cost? Bolivia has suspended mining operations after the local residents opposed it, and Chile is granting no new concessions. These are understandable steps, in the light of what economists call ‘the resource curse.‘ In a nutshell, the resource curse or the resource paradox is that often countries with non-renewable natural resources (like minerals and oil) tend to have lower economic growth and less democracy than countries with fewer natural assets.
Understanding the resource curse does not help the international battery industry or alleviate the world’s need for non-polluting sources of energy, however. The increasing price of lithium is driving research into methods of obtaining it from the most abundant source on the planet, the oceans. Industrial ecologist Robert Ayres confidently predicted to me more than a decade ago that we would get all the lithium we need from the ocean. “There’s billions of tons there,” he said. True, there is an estimated 230 billion tons of lithium in seawater, but at a concentration of 0.14 to 0.25 parts per million, I did not believe it possible to extract it in meaningful quantities at reasonable cost. Changed my tune this week.
Many companies worldwide have been experimenting with various reverse osmosis technologies (the same technology that’s most often used to desalinate seawater) to produce brine concentrates dense enough to make lithium extraction economical. Now there are reports of several companies in a dozen countries that envisage producing lithium from brine concentrates at prices ranging from $1,500 to 5,000 per ton. Here’s an article about one of them.
For more by this author, see his Amazon page here.
The political decision to power ahead with Hinkley Point C nuclear power station is the energy equivalent of appointing a tone deaf musical director to the London Symphony Orchestra. How much more evidence do Cameron and Co. need? A short litany of anti-Hinckley arguments should suffice.
In a case of economics speaking truth to power, the OECD’s 2010 World Energy Outlook quietly increased the average lifetime of a nuclear power plant to 45-55 years, up 5 years from its 2008 edition.
Even today, in the first half of the twenty-first century, thousands of villages in Africa and Asia (mainly in India) remain off-grid and have no access to electricity. Ever since a three-month stay in Kenya and Tanzania in 1985, I have dreamt of bringing solar lighting to the smallest villages on these two continents. In Kenya I was astounded to see that, as early as 1985, a few rural families had bought individual solar panels connected to used car batteries to power a single light bulb and the occasional television set. They did this because they had no hope of access to grid electricity in their lifetimes. It’s even more astounding to think that in affluent countries today, the majority of people who drive $ 20,000 cars consider solar power unaffordable without government subsidies. No wonder the world is hotting up! Such economic calculations show how skewed our thinking is.
Of course it was obvious that this journey of a thousand miles begins with a single step. Less obvious was what this first step should be. Mhairi made the first step on a recent (November 2015) visit to a village on the outskirts of a tiger sanctuary in Rajasthan. She made contact with the owner of a handicrafts shop on the edge of the Ranthambore national forest and tiger reserve who helps village craftswomen earn a living by marketing the beautiful tiger paintings, patchwork quilts with mirror designs and appliqué fabrics they make. Dharamveer was thrilled to hear about the idea of installing solar lighting for the nearby villages. He immediately took us to visit three of the 10 surrounding villages. These villagers have limited or no access to electricity. Even the few homes connected to the grid have power only 2 or 3 days a week, so they end up spending 2 to 3 hundred rupees a month on electricity bills or on kerosene for inadequate lighting with lamps. The proposal to pre-finance solar lamps for each household in the village was met with much enthusiasm. They were quite willing to pay 200 to 300 rupees a month for reliable solar lighting. And they were delighted to hear that, at a price of just 499 rupees (US $ 7 at current exchange rates), the lamps would belong to them within three months. Apart from the environmental costs of burning kerosene, the biggest drawbacks are cost and inadequate light for children studying or doing homework.
The idea we propose is quite simple. We plan to finance around one hundred of these solar lamps initially, to be distributed to a number of households in the ten target villages. Presumably they will be paid for in 3 months from the money the villagers save from their kerosene and electricity bills. We will request voluntary contributions for another 2 months and use the extra money to expand the circle of recipients till all households in the villages are covered. After which one can think of more elaborate systems, for example, like the model shown here that costs 7000 rupees or US $ 100 at today’s exchange rates. Greenlight is a for-profit company started in the US by three engineers, two American and one Indian. Their products have received good reviews in the international press.
We have decided on Greenlight’s Sun King model range, based only on our own internet research and news reports. Readers of this blog are invited to give feedback or share their own experiences with different models. I can envisage offering a range of different systems based on cost and reliability. I look forward to hearing from you.
For more by this author, see his Amazon page here.
Four recent reports on new breakthroughs in renewable energy generation and storage technology reinforce the promise that was once made for nuclear power: abundant energy for all, including the poorest in society, even though it may never be “too cheap to meter.”
High Performance Flow Batteries The promise of renewable energy technologies will be fully realized when battery storage becomes reliable enough and cheap enough to even out intermittent flows. Today the problem is partly solved by feeding energy from rooftop panels into the grid and then receiving compensation from the energy utility for the power supplied either in cash or in the form of reduced electricity bills. Looking at a typical electricity bill in Euroland (my own) I see the following charges. The unit price (per KWh) is between 6.5 and 7.3 Eurocents, but after grid charges, network costs and taxes are added, I pay 26 cents per KWh. Ironically, bulk consumers (factories, office blocks and large companies) pay lower rates, around 8 to 15 cents per KWh, depending on level of consumption. Now the whole picture is changed with the advent of low cost storage systems that make home batteries affordable and economical. Imagine home systems that can deliver electricity for all your needs at no cost for twenty to thirty years, once installed, barring the onetime cost of the system. Coming soon, to an affordable home near you.
Silicon cones inspired by the architecture of the human eye. The retina of the human eye contains photoreceptors in the form of rods and cones. Rods in the retina are the most sensitive to light, while cones enhance colour sensitivity. Modelling photovoltaic cells based on the makeup of the retina, researchers have been able to enhance the sensitivity of solar cells to different colours in the sunlight that falls on each cell and thereby increase electricity output by “milking the spectrum” closer to its theoretical maximum. Increasing efficiency of the average rooftop PV cells from the current 18-20 to 30% would make such systems cheaper by far than grid electricity mostly anywhere in the world, even in temperate countries. Coming soon, to a rooftop near you.
Modular biobattery plant that turns biowaste into energy. Biogas plants are old hat. They have undeniable benefits, turning plant, animal and human waste into energy (methane) while leaving behind a rich sludge that is excellent fertiliser. However, good designs are not common and they are sometimes cumbersome to feed and maintain. Now comes an efficient German design that promises to be modular and economically viable even at a small scale. In another development, the University of West England at Bristol has developed a toilet that turns human urine into electricity on the fly (pardon the pun) and the prototype is currently undergoing testing, appropriately enough, near the student union bar. Coming soon, to a poo-place or a pee-place near you.
New electrolyte for lithium ion batteries. Lithium ion batteries using various electrolytes have already become the workhorse of the current crop of electric cars and for medium-sized storage requirements. New electrolyte chemistry discovered at PNNL Labs shows that reductions of upto ten times in size, cost and density are feasible and various electrolyte/electrode combinations are being further tested for production feasibility. Coming soon, to a battery storage terminal near you.
So what should you do, as a concerned global citizen, until you can lay your hands on one of these devices (or all of them) for your own use? Tread lightly on the earth, don’t buy bottled water, reduce energy use, walk when you can instead of driving your car (your arteries will love you for it), buy local produce, eat less meat (your grateful arteries again), think twice before flying off to that conference (think teleconferencing), buy an electric car if you need a new one, and remember that every liter or gallon of petrol you fill into your old one not only fuels your car but potentially also the conflicts in the Middle East and/or lines the deep pockets of Big Oil which definitely does not want your energy independence.
Scroll backwards in time to the early 1970s. US President Richard Nixon appointed the Atomic Energy Commission (AEC) to produce a study of recommendations on “The Nation’s Energy Future” based on advice from the National Science Foundation (NSF). Requesting the AEC for energy prognoses is akin to asking a tiger for dietary recommendations; there will surely be no vegetables on the menu! Dr. Dixy Lee Ray, chair of the AEC, predicted in her summation of the report that “solar would always remain like the flea on the behind of an elephant.” In the early 1980s I knew another eminent researcher, Dr. Thomas Henry Lee, a Vice President for research under Jack Welch at General Electric, who often stated that nuclear power would produce “energy that is too cheap to meter,” essentially free.
The AEC study, when it was published, proposed a $10 billion budget for research and development with half going to nuclear and fusion, while the rest would be spent on coal and oil. A mere $36 million was to be allocated to photovoltaics (PV). Dr. Barry Commoner, an early initiator of the environmental movement, was intrigued that the NSF had recommended such a paltry amount for solar. In the 1950s he had successfully lobbied for citizen access to the classified results of atmospheric nuclear tests and was able to prove that such tests led to radioactive buildup in humans. This led to the introduction of the nuclear test ban treaty of 1963.
Dr. Commoner’s own slogan (the first law of ecology is that everything is related to everything else) prompted him to question the AEC’s paltry allocation for solar PV, especially since he knew some of the members of the NSF panel who advised on the recommendations. He discovered the NSF panel’s findings were printed in a report called “Subpanel IX: Solar and other energy sources.” This report was nowhere to be found among the AEC’s documents until a single faded photocopy was unexpectedly discovered in the reading room of the AEC’s own library. The NSF’s experts had foreseen in 1971 a great future for solar electricity, predicting PV would supply more than 7% of the US electrical generation capacity by the year 2000 and the expenditure for realising the solar option would be 16 times less than the nuclear choice.
Clearly, the prediction of 7% solar electric generation has not yet happened, but current efficiency improvements in photovoltaics and battery storage technologies point the way to an energy future far beyond what the NSF predicted in 1971. Fifty years from now, it is nuclear power that is likely to be the flea on the behind of a solar elephant.
The story of oil begins more than 2,500 years ago. Reliable indicators show that in China people were drilling a mile deep with bamboo pipes to recover natural gas and liquid hydrocarbons that were used as a source of fuel for fires. This was before the start of the Han dynasty in 400 BC. See this fascinating slide presentation on the progress of drilling technology by Allen Castleman, a self-confessed oil redneck.
The modern oil age is popularly considered to have started in the 19th century with the use of internal combustion engines for everything from pumping water to transportation. A glorious age, but now it’s time to move on (pun intended) to other fuels. As Saudi oil minister Sheikh Zaki Yamani predicted more than three decades ago, “the Stone Age did not end for lack of stones, and the Oil Age will end long before the world runs out of oil;” a statement at once prescient, rueful and flippant. In today’s lugubrious world, they don’t make oil ministers like that any more.
As a reminder that the world turns and turns and comes full circle in more ways than one, here’s a parting thought; an article from the Guardian of 30 January 2014. In 2013 alone, China installed more solar power than the entire installed capacity in the US, the country where the technology was invented. There is a caveat to the article that some of this newly installed capacity is not yet connected to the grid but, once installed, connections are only a matter of time.