China's Green Bubble: Just One of Many

This article is cross-posted and adapted from Al Fin Energy

China has achieved a great success in building up a gigantic productive capacity of wind turbines and photovoltaic panels. But what will China do now, with that success?

[China] now has the capacity to generate 6.2 gigawatts of solar power and 68.3 gigawatts of wind... the U.S. has 5.7 gigawatts of installed solar capacity and 51.6 gigawatts of wind power... _BW

One-quarter of China’s wind farms are not connected to a power grid—a reflection of poor planning, insufficient transmission lines, and technical concerns by regional utilities that the intermittency of wind power can be disruptive to normal operations. Wind-related power failures have caused blackouts in three provinces, while exploding equipment has been blamed in the deaths of several workers, according to local press accounts. _BW

Responding to a perceived market for green energy in Europe and North America, China engaged in a massive production build-up of wind turbines and photovoltaic panels. China was successful in building a vast production capacity of green energy generation. And now, China must face the consequences of its great success.

China’s $30 billion solar power industry is overbuilt and heavily in debt. Analysts say even billions of dollars in new government loans may not be able to pull it out of the hole.... Suntech Power Holdings (STP), the world’s largest solar panel maker, announced in September it would cut or reassign 1,500 workers at its photovoltaic cell factory in Wuxi. Suntech is counting on a $32 million loan from local authorities to avoid more job losses. To stay solvent, LDK Solar (LDK), China’s second-largest maker of solar wafers, was forced to sell a 20 percent stake to a renewable energy investor part-owned by the city of Xinyu, where LDK is headquartered. The support comes as the companies prepare to report combined 2012 losses of $987 million... Regional governments are loath to let their local solar panel makers fail.

... Help from local governments may be the biggest hurdle to making China’s solar industry competitive, says Shyam Mehta, solar analyst at the Boston consulting company GTM Research: “Until they stop supporting the uncompetitive manufacturers, this won’t go away.”

...LDK and Suntech both have balance sheets “so egregious” they would be “imminent bankruptcy candidates if they were American or European,” says Pavel Molchanov, an analyst at Raymond James & Associates. The companies didn’t respond to requests for comment. Molchanov believes infusions of government money won’t stop the losses until China grapples with its massive overcapacity—the same glut of panels that cut global prices by half in the last two years and drove U.S. solar panel makers such as Solyndra out of business. “Every province, every city, every bank is going to try to protect their vested interest as best they can,” he says. “That’s why kicking the can down the road has been the dynamic so far.” Aaron Chew, an analyst at Maxim Group in New York, concurs: “The government’s subsidy plan is better than nothing, but I don’t think it will save the industry as it’s still not profitable.”

The nation’s investments in wind power are faring no better. One-quarter of China’s wind farms are not connected to a power grid—a reflection of poor planning, insufficient transmission lines, and technical concerns by regional utilities that the intermittency of wind power can be disruptive to normal operations. Wind-related power failures have caused blackouts in three provinces, while exploding equipment has been blamed in the deaths of several workers, according to local press accounts....

China’s wind turbine manufacturers, responsible for 40 percent of the world’s output, are suffering a double squeeze, as demand has stalled both at home and abroad. Sinovel Wind Group, the world’s largest wind turbine maker by market value, posted a $45 million third-quarter loss this year on an 82 percent drop in sales—its largest loss since its initial public offering in January 2011. _Businessweek

China's green energy woes should have been expected, given the experience of other nations that followed a similar slippery downhill path.

Epic Failure of Spain's Grand Green Energy Gesture

Obama's Legacy of Corrupt Green Failures

Germany pays the price for its green foolishness

Modern industrial power grids cannot tolerate the huge moment-to-moment energy fluctuations of intermittent unreliable energy sources such as big wind and big solar. Whenever attempting a large scale conversion to "green power," initial economic costs are exorbitant. The cost of the power plants themselves, the cost of new power grid infrastructure, and the huge cost of maintaining spinning backup power sources. And then there is the cost to society as lower and middle income customers strain to pay skyrocketing power bills.

But the real costs of such an ideologically driven, top-down attempt to transform a national power grid and power supply, begin to emerge as the unreliables approach 20% or more of total power capacity to the grid. The violent and unpredictable intermittency of big wind power in particular, leads to power failures -- blackouts, brownouts, selective shutdowns of power customers, etc.

Industries begin to bail out of countries that are unable to provide reliable electrical power. A trickle becomes a flood, and before you know it a former continental powerhouse such as Germany begins to resemble a national ruin such as Greece. A world powerhouse such as the US -- if not for its shale fracking, coal, and remaining old-style nuclear power generation -- gradually decays to become an international ruin like Zimbabwe.

Russia and Saudi Arabia would love nothing better than to see the US and Germany bet their futures on intermittent unreliable green energy. Dictators love the fools who guarantee their job security into the indefinite future.

Artificial Photosynthesis: So Much for Doom

Photosynthesis uses the freely available energy from the sun to power important chemical conversions. It is the basis for the entire human food and bioenergy chain. If you can mimic photosynthesis well enough, you can directly channel the energy of the sun to synthesise all types of energy-requiring chemical reactions. You can make any biofuel you can conceive of. You can produce unlimited hydrogen while removing carbon dioxide from the atomosphere hand over fist. Artificial photosynthesis is one of the keys to the treasure chest of solar energy.

Scientists have been working on artificial photosynthesis since at least the 1980s. Step by step, science is unlocking the secrets of bioenergy and mimicking the process via other means. A Chinese team led by Xian-Fu Zhang at the Hebei Normal University of Science and Technology in Qinhuangdao, China, has settled on the carbon nanotube as a central piece of its neo-photosynthetic model.

A carbon nanotube can accept one electron for every 32 carbon atoms it contains, and so even a short nanotube accepts many electrons, says Zhang. That means a carbon nanotube could act as the receiver molecule in artificial photosynthesis.

Although there are no known small molecules capable of releasing a large number of electrons after absorbing visible light, a class of molecule called the phthalocyanines (PCs) does release a single electron when it absorbs light.

Zhang's team realised that by covalently bonding a large number of PC molecules to a carbon nanotube, they could create a multiple electron system activated by visible light...They found that they could bond 120 PC molecules to a nanotube just 1 micrometer long, and that about 25% of the electrons donated from those PCs end up being stored in the nanotube.

"We decided to create this system initially simply to efficiently convert solar energy into electricity," says Zhang.

But he thinks the nanosystem could form a key component of an artificial photosynthesis model. The extra electrons stored in the nanotubes could be used to convert a chloroplast chemical called NADP into NADPH, which could then reduce carbon dioxide to carbohydrates. _NS_via_kurzweilai.net

The ability to bind the photo-electron donor to the nanotube electron acceptor is the first step. Then the electrons are used to convert NADP to NADPH, which reduces CO2 into more complex hydrocarbons such as carbohydrates or biofuels. It is just the bare beginning, but carbon nanotubes provide a great scaffolding for entire synthetic pathways--biochemical factories.

Making Photovoltaics Cheaper and Easier

Three different approaches to speeding up the production of photovoltaic surfaces--print-on PV , paint-on PV, and quantum PV--may provide product designers and architects with novel energy solutions. First, "print-on PV" uses ink-jet printer technology to rapidly print out PV surfaces.

Konarka Technologies, the Massachusetts-based company we first recognized with a 2005 Breakthrough Award for its affordable Power Plastic solar film, said this week that it has successfully manufactured those thin solar cells using an inkjet printer. In addition to decreasing production costs because it relies on existing inkjet technology, the printable Power Plastic cells can be applied to a range of small-scale, highly variable power opportunities, from indoor sensors to small RFID installations. ___PopMech__via__BayouRenaissanceMan

Next, paint-on PV

The University of Swansea said it would now begin working with Bangor University, the University of Bath and Imperial College London on the project....Dr Dave Worsley, a reader in the Materials Research Centre at the University's School of Engineering, who led the first phase of research said that the breakthrough could have enormous implications for the way new buildings are powered.

"[Corus' pre-finished steel division] Corus Colours produces around 100 million square metres of steel building cladding a year," he observed. "If this was treated with the photovoltaic material, and assuming a conservative five per cent energy conversion rate, then we could be looking at generating 4,500Gw of electricity through the solar cells annually. That's the equivalent output of roughly 50 wind farms."

It is also hoped that the solar cell material could be applied to steel using existing paint rollers used during steel manufacturing processes. The researchers said they hoped to develop a way of applying layers of solar cells to a flexible steel service at a rate of 30-40m sq per minute, potentially making the process relatively cost effective.___Source

Eventually, every conceivable (non-living) surface could be generating electricity while the sun is shining. As engineers provide more flexible methods of adding PV to virtually any product, it is up to designers to incorporate the technology in such a way as to be unobtrusive, safe, and reliable.The third new PV approach is custom-sized quantum dot PV for catching solar energy across the solar spectrum.

The researchers used four different sizes of quantum dots (between 2.3 and 3.7 nm in diameter) which exhibited absorbent peaks at different wavelengths (between 505 and 580 nm). The group observed a trade-off in performance corresponding with quantum dot size: smaller quantum dots could convert photons to electrons at a faster rate than larger quantum dots, but larger quantum dots absorbed a greater percentage of incoming photons than smaller dots. The 3-nm quantum dots offered the best compromise, but the researchers plan to improve both the conversion and absorption performances in future prototypes.

Besides investigating the quantum dots’ size quantization effect, the researchers also experimented with two different nano architectures – particle films and nanotubes – that act as scaffolds for transporting electrons from the quantum dots to the electrodes. The group found that the hollow 8000-nm-long nanotubes, where both the inner and outer surfaces were accessible to quantum dots, could transport electrons more efficiently than films. ___NextBigFuture

Solar energy is available in quantities too large for humans to use. By incorporating PV into more products and installations, we can use ever more of the plentiful resource.

Of course, the real solar revolution happens when we can store as much energy as we can collect.

Look At All That Surface Area! NextGen Nanowire: Solar Cells "On Steroids"

New gallium arsenide nanowires grown on a silicon substrate by McMaster University researchers promise to deliver a broader spectrum photovoltaic return.

"Most of the nanowire work to date has focused on silicon nanowires," says LaPierre, explaining that McMaster's approach relies on nanowires containing multiple layers of exotic Group III-V materials, such as gallium arsenide, indium gallium phosphide, aluminum gallium arsenide, and gallium arsenide phosphide. "It creates tandem or multi-junction solar cells that can absorb a greater range of the [light] spectrum, compared to what you could achieve with silicon. That's one of the major unique aspects of our work."

When used in conventional crystalline solar cells, Group III-V materials are known to have much higher efficiencies than silicon, but the great cost of these materials has limited their use. LaPierre says that cost becomes less of an issue with nanowires because so little material is needed. This is in part because the structure of the nanowires provides a more efficient way to absorb light and extract electrons freed by the light. In conventional solar cells, which are made of slabs of crystalline material, greater thickness means better light absorption, but it also means that it's more difficult for electrons to escape. This forced trade-off is overcome with nanowires. Each nanowire is 10 to 100 nanometers wide and up to five microns long. Their length maximizes absorption, but their nanoscale width permits a much freer movement and collection of electrons. "The direction in which you absorb the light is essentially perpendicular to how you collect electricity," explains LaPierre. "The dilemma is overcome."___TechReview

The sheer surface area is amazing. Animal organs such as lungs, kidneys, intestines etc. take advantage of huge surface areas for gas exchange, nutrient and fluid absorption, waste elimination, etc. Nano-scientists are learning how to do the same thing in a number of devices--including the above photovoltaics approach.

Plasmonic Density--The Exciting Opening of a Vast New Field of Science

Electromagnetic waves such as visible light, can generate electric energy through photovoltaics, can boost an electron to a higher energy level, and can create plasmons--density waves of electrons on a surface.

Plasmons are density waves of electrons, created when light hits the surface of a metal under precise circumstances. Because these density waves are generated at optical frequencies, very small and rapid waves, they can theoretically encode a lot of information, more than what's possible for conventional electronics. Source


Advanced Nano blog points to a SciAm article discussing the potential of plasmons to vastly increase data density on computer processor chips.

In the 1980s researchers experimentally confirmed that directing light waves at the interface between a metal and a dielectric (a nonconductive material such as air or glass) can, under the right circumstances, induce a resonant interaction between the waves and the mobile electrons at the surface of the metal. (In a conductive metal, the electrons are not strongly attached to individual atoms or molecules.) In other words, the oscillations of electrons at the surface match those of the electromagnetic field outside the metal. The result is the generation of surface plasmons--density waves of electrons that propagate along the interface like the ripples that spread across the surface of a pond after you throw a stone into the water.

....This phenomenon could allow the plasmons to travel along nanoscale wires called interconnects, carrying information from one part of a microprocessor to another. Plasmonic interconnects would be a great boon for chip designers, who have been able to develop ever smaller and faster transistors but have had a harder time building minute electronic circuits that can move data quickly across the chip.

....Ultimately it may be possible to employ plasmonic components in a wide variety of instruments, using them to improve the resolution of microscopes, the efficiency of light-emitting diodes (LEDs) and the sensitivity of chemical and biological detectors. Scientists are also considering medical applications, designing tiny particles that could use plasmon resonance absorption to kill cancerous tissues, for example. And some researchers have even theorized that certain plasmonic materials could alter the electromagnetic field around an object to such an extent that it would become invisible.

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