WastedEnergy

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Archive for September, 2010

The Day The Skies Ran Red

Posted by wastedenergy on September 28, 2010

The white man believes he owns every piece of land upon which he sets foot.  But there is another story to be told.  Where to begin?

Let’s start yesterday.

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Playing With Fire Part II: After Burners

Posted by wastedenergy on September 17, 2010

It’s Energy for Tomorrow.  It’s a green machine, and it will keep the engines of the economy humming fresh and clean.  Clear blue skies, so clear it makes you want to go right up to a bus and suck down exhaust directly because it’s so much cleaner than the air around it.  And it will last forever.  Even if we do start to run short around these parts, we have so much of it here on the Gas Planet that the very idea that there ever wouldn’t be enough of it to do everything we need is…well, it’s out of this world.

And if you like that idea, you might also enjoy some of the other wonderful things we have to offer from Uranus.

The god of the sea says he might have some gas down there too.

So what’s really going on here?  And how can we make sense of the true nature of natural gas?  We can start by taking a look at some of the facts most economists and energy policymakers seem to have missed in their discussions about this highly leveraged commodity on which we seem to be quickly leveraging the future of our entire civilization.

The first thing to keep in mind about the natural gas market is that it is not anything like the oil market: there is no integrated global trading system, and it would be impossible for a single producer or cartel to dominate the global supply.  As a result, most natural gas used in North America does, in fact, come from North America.  This fact is often used as a selling point by proponents of natural gas like T. Boone Pickens, but in fact what it more reflects is the differing physical properties of the fuels and the fact that oil is by far the more convenient when it comes to transportation.  In other words, the resources are not fully substitutable for one another, and shortages of each are likely to cause their own different yet interconnected economic problems.

“Whaaat? I didn’t major in economics!”  It’s OK Boone, neither did I.

There really is no global natural gas supply; the only way to ship the stuff to other continents is in liquefied form (LNG) using enormous and expensive tankers and terminals, infrastructure projects with decade-plus lead times.  For a number of reasons, I believe that LNG will be largely irrelevant to global energy markets except in a few cases wherein the available supply for the foreseeable future is already spoken for by established importers.  The costs, risks, and public opposition to constructing new LNG terminals is substantial and may be insurmountable, particularly in relation to the quantity of overseas gas trade that would be needed to make up for regional shortages as large as those that could occur in a major gas consumer like the United States.  And of course, the process of liquefying and transporting the gas itself consumes significant quantities of energy and, together with leaks throughout the process, goes a long way toward erasing any possible benefit to using gas for the climate.  For these reasons, it is safe to almost completely ignore someone who talks about “global natural gas supply.”  To put it simply, there is no such thing.

So natural gas production is much more of a regional and continental game, and costs of production will therefore differ considerably from one location to another, even within the same continent.  For this reason, it makes little sense to talk about uniform, homogeneous pricing for gas as occurs on commodity exchanges, but there are a number of ways to do so, starting by calculating the breakeven price for production of marginal (new to come online) gas wells.  Breakeven price is really just a way of asking what the wellhead price of natural gas needs to be in order for an exploration and production (E&P) company to make back the money it spends in finding, drilling and constructing, and operating the well, and therefore to justify as marketable any new gas that becomes available.  The first method is to calculate the full amortized cost over time, the second method is to calculate only the operating costs while ignoring everything else, and the third is to ignore the share of the production cost that comes from shareholder investment. 

It should be noted that only the first method actually tells you anything about the sustainable cost of bringing gas to the wellhead and is the only measure that has any real meaning in looking at the overall resource available.  The second and third make no real sense for reasons that should be obvious if you are familiar with the basic principles of full cost accounting, in addition to the fact that every well is considerably different, even within the same gas field or “play” as the industry lingo goes.  Allowing the difference to be made up in equity while failing to report these costs in the wellhead price is the type of practice that allows a commodity bubble to form, although in this case the reported wellhead price is too low rather than too high as in most bubbles.  It remains a bubble nevertheless, with the reported wellhead price lower than the actual full cost and therefore the full costs not being reflected in pricing.  The price of natural gas today does not reflect the actual economic outlook primarily because E&P companies are so highly leveraged under private equity arrangements, especially virtually all shale gas producers.  If you want to get a real sense of the economic effects of one energy source versus another, you need all costs need to be included in the pricing to give an accurate representation of total E&P costs, which means adding in the equity provided by investors.  Once you perform this basic calculation, it becomes immediately obvious that the price of natural gas must considerably increase, at the very least by a factor of two to four, for shale and other unconventional gas sources to make up any kind of substantial share of the total gas market.

Thus, the idea on which we are supposed to be sold, that natural gas will be cheap and abundant for a long time (and therefore also the idea that it outcompetes renewable energy sources) is built on a myth that current, relatively low wellhead prices can be sustained. They cannot.  Most of the proponents of shale gas act as if it is some new resource that was just recently discovered.  It’s not; geologists and oil and gas engineers have known about the gas-bearing properties of certain shales for a long time.  In fact, it was only the gas price hikes of the early 2000′s that caused any interest in shale gas at all, and all gas companies know that the price still needs to increase considerably to make their investments in shale gas profitable.  At this point in time, they are not, and we all know what must eventually happen to a business that can’t generate profits.  What the gas companies are banking on is the idea that we will, believing the myth of cheap gas, fail to build viable alternative energy technology and infrastructure, and that we will end up being forced to pay the true, higher prices of gas once they inevitably rise. 

So it’s time we cut through the cloud here and started basing our projections on physical facts and real costs we already know for certain will come about, rather than on the babbling of people on Wall Street caught up in the day-to-day movement of markets and trained to avoid thinking about anything other than the next quarterly earnings report.

Gas bubbles are, of course, nothing new. 

Additionally, the cost of finding and producing gas is not the only cost involved; the delivered cost of gas to consumers of all types will, of course, be higher than the wellhead price, as it must include amortized pipeline construction and operation costs.  These costs are also more or less certain to increase considerably over the long term, as gas wells close to demand centers are gradually depleted and the average distance that gas must be carried through pipelines increases as more remote sources are exploited, just like with oil.  Bringing gas to hubs and then to various urban demand centers in the U.S. from distant wells in Alaska or Canada is inherently more expensive than piping it from nearby gas fields, while offshore gas pipelines are also more expensive to construct and operate and constitute an increasing share.  Transporting large quantities of gas over long distances also introduces all kinds of new safety, environmental, and national security risks.

So, natural gas might not be the future, and there are a lot of reasons to believe it shouldn’t even be the present anywhere near the extent to which it is.  Still, the idea that a long, comfortable transition to sustainable sources of energy will be made possible by ample supplies of clean, climate-friendly gas is being sold heavily by industry today, and many environmentalists seem to be taking the bait, although skepticism does seem to have increased of late.  But what will happen if the public actually does buy into this idea and agrees to bank the future on going from oil addicts to gas zombies based on “hundred year supply” claims?  What will the world look like, say, 28 years later?  Well, one thing you can count on is that a whole lot more of the Gas Planet will look something like this, times a few hundred, thousand, or million, depending on how each individual well plays out and just how much of the stuff we are capable of burning up before we simply kill ourselves off:

Careful, California: I hear the Texas Chicken Pox is contagious, and it’s spreading like wildfire these days.  Might even turn you into a zombie too.

And of course, don’t look now, but I don’t think Neptune is too thrilled anymore.

Meanwhile, from Siberia to Nigeria to down home in Lou’sana, the fires of industry and the midnight oil kept burning, never once stopping to allow for the possibility that one day soon all of it, every last bit, might come to an end…

Keep on burnin’…

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Heart of Gas

Posted by wastedenergy on September 16, 2010

Here it is, folks: your hundred year…oh.  Snap.  Guess there was really nothing down there after all, huh?  To be continued…

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Playing With Fire

Posted by wastedenergy on September 11, 2010

By all accounts, 2010 has not been a good year in the press for fossil fuel interests.  The media furor surrounding the Deepwater Horizon blowout that killed eleven rig workers and the subsequent release of nearly five million barrels of oil into the Gulf of Mexico highlighted some of the risks associated with continued reliance on increasingly remote energy resources in challenging and hostile territory.  The coverage has raised the profile of discussions surrounding a host of other incidents that might otherwise be considered unfortunate but rather mundane and un-newsworthy, from major mining accidents around the world to a pair of ruptured pipelines carrying synthetic crude from the Canadian tar sands, and even another, albeit smaller, rig fire in the Gulf of Mexico earlier this month (though no one was injured and, so far as anyone has been able to tell, no additional oil has been released as a result of this particular incident).  Meanwhile, the rhetoric in public discussions over how to manage the problem of climate change caused by burning fossil fuels heated up along with the weather this summer, with Bill McKibben’s F-bombs speaking for many other advocates for change as the U.S. Senate deferred action on the issue and the EPA assured industry leaders that its regulatory approach would not be too tough on business.

If public scrutiny of fossil fuel businesses goes back at least to the days of Standard Oil, the lines recited by business and government leaders to deflect criticism and assure the public that they are working on the problem and that everything will soon get back to normal certainly come across as old hat as well.  Oil companies’ methods of demonstrating their commitment to our collective energy future and to the development of renewable alternatives and energy efficiency are tried and true, since they perfected the art of appearing profoundly concerned during the oil shocks of the 1970′s that followed the peak in U.S. Lower 48 oil production and OPEC’s subsequent assumption of control of the world supply of oil.  So it is hardly unfair for critics to view as insincere the token commitments we see today, with utilities like Southern Company touting their “common sense” approach to energy (hint: common sense involves an awful lot of coal) and oil majors Exxon-Mobil, Shell and BP investing large-sounding sums, though never quite enough to threaten the viability of their oil business, in development of algal biodiesel, energy efficiency technologies, and solar panels.

One oil billionaire in particular has been making the rounds on the media and public speaking circuit for the past couple of years, talking up a big game about what his umbrella company, BP Capital Management, has been doing to help save America from its energy crisis by investing in gas, gas, gas, more gas, and, on a particularly breezy day, wind power (although only if the price of gas is not too low).  In case you forgot about the other BP, here he is:

The Gasman Cometh: Is the wildcatter and corporate raider ready to fight for a clean energy future?

With some players in the energy business going as far as to claim that the U.S. will become “the next Saudi Arabia of energy” with its vast resource of shale gas, with many businesses and potential leaseholders eager to cash in on a potential drilling boom, and with politicians and industry groups clamoring to proclaim natural gas as “the cleanest fossil fuel,” “a transition fuel,” and “a bridge to America’s Clean Energy Future,” the race is on to tap into sources of gas north, south, east and west. 

Unfortunately, making that transition hasn’t been quite as much of a gas as some of the rhetoric might suggest.  For one thing, Pickens and some of the electric utilities have been a bit wishy-washy on making the transition move past the gas phase: with gas prices so low, they say, there isn’t really much point in dealing with all the hassle of actually doing the renewable part, as it’s just not competitive.  The part you don’t hear about as much is that with gas prices so low, natural gas isn’t really terribly competitive either: the limited field experience with shale gas suggests that the short shelf life of gas wells may not be enough to recoup the investment in more expensive horizontal drilling and hydraulic fracturing technology, at least not at today’s prices of $4 or 5 per thousand cubic feet.  The high costs of drilling and widespread reports of contamination of water supplies from drilling fluids also raise questions about the long-term viability of shale gas as an energy source.  And the quantity of oil consumed and pollution generated by trucks carrying drilling fluid and equipment to and from drilling and disposal sites places in doubt many of the potential benefits of gas for cutting consumption of imported oil and cutting pollution from dirtier fossil fuels.  At the very least, companies involved in gas drilling will soon face an additional cost of complying with EPA’s request for information on chemicals used in fracturing fluid, although as per the 2005 U.S. Energy Independence and Security Act, fluid disposal sites will still not be required to comply with the same clean water regulations applied to other industries.

With so much potential resource available, both conventional and unconventional natural gas are sure to continue playing a role in the U.S. energy mix, as they have for decades.  But even the ”cleanest” fossil fuel is hardly as unproblematic or as secure in its long-term supply as its promoters suggest, for both economic and ecological reasons.  And unfortunately, the recent spike in hydraulic fracturing (and, from time to time, in the chemical oxygen demand of the municipal water supply) isn’t the only boom associated with natural gas.  With most of the U.S. reliant on natural gas for heating, we’ve most all become accustomed to inviting the gas man into our homes, but what might really make some of the problems with dependence on any fossil fuel hit home are the big accidents, like the gas pipeline explosion last week in California that left four Bay Area residents dead and turned the surrounding area into a hollow burnt-out shell.  And of course, it was the gas flowing from the Macondo well that ignited aboard the Deepwater Horizon and caused the rig to catch fire and sink on that fateful day in April.  What these accidents and the steady accumulation of hydraulic fracturing horror stories reveal is that in the end, dependence on any finite energy resource means you’re playing the same game: depletion, risks from an ever-expanding network of infrastructure, and continually increasing costs both at the wellhead and to the environment and public health. 

Play with fire, and you’re bound to get burned eventually.

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Training Wheels

Posted by wastedenergy on September 8, 2010

What has four wheels and flies?  If you guessed “an automobile culture that’s rotten to its core,” you may be onto something.  But what can be done to make it right?

We can start by looking at what makes it wrong, a big part of which is reliance on polluting liquid fuels that just don’t come as easy as they once did.  We already know that a dependence on fossil fuels harms the environment and will make life increasingly difficult for more and more people as we progress into the twenty-first century.  The fuels that remain in the ground are expensive, hard to reach, and often of very low quality, and even those fuels that will be made available will require massive diversions of capital and resources to enormous new production facilities and transportation infrastructure, reprepresenting ever-growing  network of Deepwater Horizons waiting to happen and an escalating assault on the stable climate systems upon which human civilization has been precariously built.  But imagine life with no vehicles, no motorized transport at all, and the consequences are also far more dire than a cancelled vacation here and there.  The inability to maintain efficient networks of transportation and delivery easily means the end of economic growth, and even beyond that, the total collapse of markets, prospects of not just wars but world wars for remaining supplies, and perhaps even the utter end of technological humankind as we know it.  Some people believe it is already too late to do anything about it and that our current economic troubles represent merely the beginning of a much longer, inexorable descent into chaos and societal collapse.  They may be right, and it is a sobering thought indeed.  They are even more likely to be right if we do little to nothing to change our energy consumption patterns in advance of what lies over the horizon.

Clearly, the consequences of an imminent and possibly quite steep decline in supplies of motor fuels are vastly more far-reaching than a few more cents, or even dollars, per gallon.  And yet most of us think nothing of burning a few gallons of the stuff every day taking the kids to soccer practice, or more than a few lifting a giant chunk of metal into the sky to carry us across paltry distances, albeit only after spending an hour or two checking in.  Meanwhile, the political aftermath of the Deepwater Horizon has focused less on viable alternatives and long-term planning and more on meaningless bickering over a moratorium on deepwater drilling, as if that even addressed the issue at hand.  Imagine what it takes to keep pumping a few billion gallons every single day year in and year out, and you get a sense of just how irrelevant any new drilling and any new discoveries will be in prolonging the fantasy of happy motoring.  And it’s not just cars, either: without oil, we can’t run all manner of planes, trains and automobiles, from the tractors working the fields to the trucks that deliver food to the grocery, to all the aircraft packed with fresh off-season produce flown in daily from the other half of the world, never mind all those plastics and industrial materials from fungicide to hand soap.  So regardless of how one might feel about new drilling and pipelines filled with synthetic tar sand crude, it would seem to be a no-brainer to support infrastructure needed to actually get OFF oil in a few areas, and at the very least save what remains for where it is really needed.  Right?

Wrong.  Here you can find yet another case proving that you don’t have to know the first thing about how the world actually works to get a business degree, or even to teach business.  For one thing, it demonstrates the kind of paralytic thinking on investments for the future and myopic focus on immediate short-term matters that has for so long held back economists from adequately performing their charge of helping society make good decisions in allocation of resources, the same sort of thinking that got us to the point of crisis in the first place and now threatens any hope of a real and lasting economic recovery.  Forget the proven track record of high-speed rail in Europe and the fact that China is now making laps around the United States in becoming the technological leader of the new century.  Conveniently ignore that austerity measures help nobody, that no infrastructure project has ever succeeded without the support of government institutions, and that it was the abandonment of government support for critical infrastructure, under the misleading banner of reducing debt, that caused the Great Depression to sink to its lowest depths in the late 1930′s.  Continually call for delay and cancellation of the transition to sustainable transportation infrastructure by reiterating the self-fulfilling prophecy that jobs in manufacturing will be added elsewhere rather than at home.  And never mind the casual sidestepping of the job creation benefits and economic revitalization along new rail corridors in a state like California suffering under staggering unemployment.  It is the following sentence that is especially telling, and troubling, in indicating where we stand on addressing matters of energy and our collective future:

“California doesn’t need high-speed rail between San Francisco and Los Angeles: With 10 airports and six competing airlines, we don’t have to worry about one strike or terrorist shutting down the whole system.”

Does anything about the above statement seem a bit odd in light of the physical reality of fossil fuels and the crushing effects of oil dependence upon the economy?  Do the authors truly believe that a terrorist attack is the only thing that could cause a systemic failure in such a transportation network?

It is the total ignorance on matters of natural resources and ecology of today’s business and political leaders, the voices speaking loudest on matters of how to best address, or rather ignore, our economic crisis, that should truly raise alarms.  If leading “thinkers” like these have their way, you can forget about any kind of smooth transition away from the fossil fuel economy.  Theirs is a  prescription to crash and burn, and yet they cannot even see the stakes at hand because the very ideology embedded in their academic and professional training does not allow them to understand or even acknowledge the physical limitations of business-as-usual, as set by immutable geological and ecological principles.  With this level of thinking on economic matters, you can be sure we’ve crossed the bridge to nowhere and are now headed full bore off the cliff and into the sea.  We’d better start laying down some track turning us back around in the opposite direction, and fast.

At long last, it’s time to leave the past behind…

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Kochheads

Posted by wastedenergy on September 6, 2010

Well now.  If you missed this one, you might want to go back and have a look real quick.  In what amounts to a rather unsurprising turn of events, the number one historical benefactor of climate change denial “science” and one of the largest air pollution violators in the United States, the conglomerate Koch Industries, turns out also to be behind more than a few astroturfing efforts today to seed anti-government vitriol among the general populace.  And, frighteningly enough, it seems to be working.  Over half of Americans today either don’t believe climate change is real or don’t believe human activity is causing it, a surprising change from just a few short years ago considering all it takes to see how the climate has changed is a quick glance at this summer’s headlines and a short trip out the front door.  And an anti-government populist sentiment seems to have taken hold over the electorate as well, with fringe candidates like Sharron Angle of Nevada and Rand Paul of Kentucky making inroads right and, well, right.

Atlas Farted

If the effects of such a populist libertarian movement are rather unpredictable and could be far-reaching in producing a moment of political psychosis for the United States, the causes are quite evident and have a lot to do with this pair of Dubious Brothers.  Of course, you might say, this sentiment couldn’t possibly be based entirely on political astroturfing, right?  Aren’t people just agreeing with the standard talking points in support of neoliberal economics, as conveniently provided by the also-Koch-funded-and-founded Mercatus and Cato Institutes?

I had heard a little bit about the new exhibit at the Smithsonian Natural History Museum funded by Koch money, the Hall of Human Origins, and so I decided to check it out over the weekend.  Curiously, the exhibit opens with a statement about adaptability to changing climate conditions, as if that were the number one defining characteristic of human evolution.  A visitor unfamiliar with the Koch ideological vision might be surprised by this front-and-center emphasis on the matter of climate change, perhaps wondering why a public institution like the Smithsonian might stick its neck out in support of the claim that today’s climate changes are not really so bad (after all, we can always just adapt by building underground cities and evolving curved spines, right?).  Other gems included a graph showing global average temperature over the past ten million years (cold was up and warm was down, for some reason), to conveniently obscure the rapid changes of the past century or so as a small and steeply downward-sloping blip at the end of the graph.  With so much variation in the past, how could anyone possibly worry about the changes we are undergoing today?  Never mind that the pace of change is much faster today than any paleo-climate records show and that the causes can be more or less entirely ascribed to human-induced changes to the composition of the atmosphere from activities like Koch Industries’ lucrative oil refining operations.  Why do anything to change course when adaptation is clearly so easy?  I’m sure that twenty million Pakistanis displaced by flooding this summer would agree.

The latest Koch effort to fund “science” in the private interest comes in the form of $1 million in support of Proposition 23, a referendum that would suspend Assembly Bill 32, the California cap on greenhouse gas emissions.  And, predictably, the Koch-funded Tea Party plans to hold a rally in California on September 12 in support of Prop. 23.  Sure, that makes perfect sense, doesn’t it?  Tea Partiers care deeply about individual autonomy and states’ rights, after all, and they don’t want interference from outsiders.  Unless, of course, those outsiders happen to represent Texas oil money.  Remember, Big Government telling you what to do is Bad; Big Business is a universal Good.  Unless, of course, those big businesses happen to be a part of California’s homegrown clean energy industry that threatens to provide competition to status quo energy conglomerates and make the United States a meaningful player in the renewable energy economy of the future.  That would also be Bad.

Of course, stronger hurricanes and heat waves and more frequent droughts and floods are not the only ways the climate is changing.  With anti-government populism taking a strong foothold in American politics and threatening to overturn the Democratic majority in Congress, changes in the political climate are becoming increasingly difficult to deny as well.  Sooner or later, however, no amount of money poured into the political coffers of right-wing fringe political candidates will be enough to deny the urgency of government action on climate change.  When that happens, and it looks increasingly like it has already begun, we’ll be glad California took the lead in adopting greenhouse gas emissions caps and promoting the development of clean energy technologies, so that we have the options we need to cope.  Unless, of course, those caps are overturned and we have no plan going forward except to continue depending upon the increasingly dirty, expensive, and unreliable technologies supplied by Koch and the like. 

But that is exactly what they had in mind, isn’t it?

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What’s in Store?

Posted by wastedenergy on September 3, 2010

Ask most energy experts what they see as the greatest obstacle to using renewable energy as the backbone of the electric grid, and you will usually get the same answer: “intermittency.”  The most readily scaleable renewable energy resources, wind, solar, and wave power, vary in their intensity and availability for commercial energy production according to daily and seasonal patterns in addition to random variation.  So while these technologies offer promise for reducing fossil fuel consumption today, they remain “unreliable” and even at high levels of market penetration must rely on fossil fuels for backup power.

Or so goes the popular conceit.

In fact, the reliability of electricity has little to do with how it was produced, and a whole lot more to do with what happens next.  What causes power to go out is usually a failure somewhere in the vast network that instantaneously carries that electricity to its destination; the circuits in your house don’t very well care if they are powered by wind or by exploding oil rigs, but they certainly care whether the power can get there in the first place.  And right now, the only way to get it there in most places is to constantly match the output of power plants running at any given time precisely against the amount of power consumed by all of the customers of an electrical grid.  This practice incurs not only enormous costs to keep the lights on through during spikes in demand, but also the risk of catastrophes like the August 2003 blackout of much of the eastern United States.  A major malfunction at a massive coal-fired, nuclear or hydroelectric power plant is far more likely to result in cascading power failures than a problem anywhere in a network powered by many small hydro installations, solar panels, wind turbines or combustors.  The smarter two-way grid required by such a network would be intrinsically far more reliable than today’s ancient one-way AC transmission systems, but there is still the problem of intermittency: electricity must be consumed instantaneously as it is produced; it cannot be stored for long periods of time before use, unlike most other commodities.  Right?

Of course that is not the case: as we all know, we already use stored electrical energy from batteries in all manner of applications large and small, including relatively large-scale energy storage systems used by hospitals and other critical sectors in need of uninterruptible power supplies.  And of course, many utilities already make use of pumped-storage capabilities of hydroelectric dams.  But proposals to store enough electricity in batteries to feed the grid in times of need run up against all manner of obstacles: they may take up too much space, requiring large purchases of additional land, or material supply constraints and costs may be too burdensome considering the scale of deployment necessary, as with lithium or nickel-metal hydride battery models using lanthanum, a rare-earth metal in limited supply.  But grid energy storage is probably necessary for integration of variable-supply renewable energy sources at scales large enough to replace traditional power plants.  And it has an added benefit as well:  in combination with two-way transmission capabilities and excess production capacity, energy storage results in a sort of “cloud grid” wherein no single energy production unit is ever essential to the functioning of the system, and the network would become resilient to even large numbers of intermittent sources failing to provide or numerous failures along the transmission and distribution system.  In essence, the ”smart grid” needs to function more or less like the Internet: less like a series of tubes, which can get clogged easily, and more like a big truck, wherein excess energy can be easily dumped into storage at low cost and then retrieved as needed, whether for cheaper power during peak loads near where it was produced, or to provide support when other nodes in the network fail elsewhere.

For battery storage or any other energy storage system, the most important numbers are the amount of power that can be discharged at a given moment, measured in megawatts for utility-scale systems, and its total storage capacity, measured in MWh or simply hours if the voltage remains more or less uniform over the course of the discharge phase.  One advantage of battery systems in many applications is the simplicity offered by their relatively uniform discharge profile; the power density of compressed air, for instance, declines sharply as the storage container gradually depressurizes over the course of a discharge phase.  The advantages of NaS in particular for grid storage are many.  Their energy density is high, offering a small footprint compared to many other storage options and the possibility of siting large numbers of storage facilities at many points along the grid.  They are efficient, relatively durable, and can survive many cycles of large fluxes of energy, making them well-suited to the rigors of utility-scale energy production.  And perhaps most importantly, they scale up easily, as larger cells are more economical to construct, and the materials required are far cheaper and more abundant than those used in any other battery design.  The most common NaS batteries available today are of the 1 MW, 8-hour class, while larger cells and more cost-effective, efficient, and reliable designs are in the development and testing stages and offer promise in addressing the remaining obstacles to widespread implementation.

So why have NaS batteries just begun to arrive on the scene?  For one thing, the technology is fairly new.  First developed in the 1960′s, the first batteries of utility size were created by a consortium of the Tokyo Electric Power Corporation (TEPCO) and NGK Insulators, which produces the insulating material needed to keep the battery within its operating temperature range, during the 1980′s.  This consortium remains the sole commercial manufacturer of NaS batteries for grid energy storage.  A prototype battery for mobile applications was released in 1991 for the EcoStar electric vehicle, but ultimately proved less appropriate for vehicles than the lithium-ion and nickel-metal hydride batteries in use today, and the concept was abandoned.  The first U.S. field trials of the technology took place in Ohio from 2001 to 2002.  In 2006, the New York Power Authority installed a battery to store off-peak electricity for powering compressors used by the Metropolitan Transit Authority’s Long Island compressed natural gas (CNG) bus fleet. In 2008, the world’s largest array of the batteries was installed at a wind farm in Japan, consisting of seventeen 2-MW units used to provide storage of off-peak wind generation and smoothing of plant output.  That same year, Xcel Energy, the leading U.S. utility in wind power market penetration, began testing a 1-MW unit at a wind farm in Minnesota, and the first results of the tests were released earlier this year.  In 2010, the town of Presidio, Texas, connected to the U.S. power grid only by a single transmission line built in 1948, began trials of a 4-MW, 8-hour module for use in case of supply disruptions and to bring down the cost of power, the largest single battery of this type built to date. 

While the tests conducted so far show great promise, the NaS battery remains a relatively young technology, with most battery chemistries in use today dating back to the nineteenth or early twentieth centuries, and large-scale grid energy storage is still a fairly new idea.  And other technologies could compete to fill the niche of modular, low-cost energy storage systems as well; compressed air looks to be another dark horse candidate as higher efficiencies are achieved and costs decline.  But with NaS batteries now reaching the necessary levels of reliability and commercial production, is large-scale battery storage ready for prime time as well?  Could these devices be the answer the conundrum of large-scale grid energy storage?  It certainly makes a short list of serious contenders, and considering the urgent and widespread need to upgrade the aging U.S. electric grid and build synergy with the ever-growing renewable power sector, what better way could there be to put Americans back to work?

Posted in Energy Consumption, Energy Production, Urban Planning | Tagged: , , , , , | Leave a Comment »

Go With The Flow…

Posted by wastedenergy on September 1, 2010

Here are a couple of simple diagrams I whipped up to illustrate the difference between two kinds of networked systems.  What is the obvious difference between these two types of networks?

Now, envision enlarged versions of these networks, extended by adding more flows, additional consumption hubs, and either more (in the case of the second network) or larger (in the case of the first) production hubs.  Think about what happens when the flow along one of these networks is disrupted.  Which system is more resilient (i.e., able to continue operating) when the flow is interrupted at any point in the network?

In other words, which type of system is more reliable?

How do you suppose this diagram might illustrate the challenge of meeting the world’s energy needs for the twenty-first century, what types of energy sources are beneficial, even necessary, to add, and which are a waste of time, or even counterproductive?

Posted in Energy Consumption, Energy Production | Tagged: , , , , | Leave a Comment »

 
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