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Electric Grid is a Vast Machine

Guinnessy writes "The latest issues of the Industrial Physicist suggests that 'the vast system of electricity generation, transmission, and distribution that covers the United States and Canada is essentially a single machine-- by many measures, the world's biggest machine.' The article says that because deregulation ignored the physics of the machine, we have blackouts, a fact the industry warned regulators about in 1998. It has some nice hard science data for those interested in why we're going to get some more blackouts in the future unless Congress gets its act together."

37 of 329 comments (clear)

  1. Same over here by stewwy · · Score: 2, Interesting

    A recent report in the UK suggested the same thing ... but we're getting them after the US as usual :(

  2. strange by Timesprout · · Score: 2, Insightful

    That in this day and age we are concerned that one of the underlying principles of our success may be a house of cards.

    --
    Do not try to read the dupe, thats impossible. Instead, only try to realize the truth
    What truth?
    There is no dupe
    1. Re:strange by faldore · · Score: 3, Insightful

      This is an excellent point - this is one example of how capitalism is not a perfect system! I am not saying that socialism is the answer in general, but it is clear that in some areas capitalism is an excellent way of handling distribution, but in others socialism is superior. That's why we're seeing the free software movement - because software makes MUCH more sense in a socialistic distribution system, because it's so easy to build on others' work, but our capitalism prevents us from doing it.

      I repeat I'm not saying socialism good capitalism bad! Nobody accuse me of such please! Thanks.

    2. Re:strange by ajs318 · · Score: 2, Insightful

      Society has been dependent upon technology ever since someone discovered that if you bashed two pieces of rock together, you got (a) sharp edges that could be used to kill an animal bigger than yourself and (b) flying hot bits that would set fire to dry grass. When someone who otherwise would have died was saved thanks to the use of either a stone weapon or fire {perhaps by avoiding starvation, or even winning a fight against an animal that otherwise would have killed them; perhaps by avoiding food poisoning by cooking some meat; perhaps by avoiding hypothermia}, that was the moment we began to become dependent upon technology. And when a group of people sat down to cook over a fire what they had killed that day with their axes and spears, the dependency was as good as complete.

      --
      Je fume. Tu fumes. Nous fûmes!
  3. Meanwhile in the land of Oz by evil_roy · · Score: 5, Informative

    We are planning deregulation in our most populated state..NSW. And we are using the US as the model for deregulation/privatisation of our energy corporations.

    Why isn't this sort of thing in the mainstream press? In Australia there are clear reasons why not..the two richest guys who would undoubtedly cash in on the deregulation own all the media..that's right, Murdoch and Packer own our papers,our magazines, our pay TV, the 'infoportals' for our largest ISP's,our regular tv stations and our sports.

    1. Re:Meanwhile in the land of Oz by that_xmas · · Score: 2, Insightful
      Maybe because people are don't understand physics.

      :)

      If you are interested in the deregulation here in the US, you can poke around this web site....

      BTW, large portions of the United States deregulated without any problems. New England is mostly there and Texas has deregulated without any problems.

      The main problem with the North American grid, as I understand it, is that it basically works by having twenty guys spread across the NA calling each other when something goes wrong in their part of the electric grid. It's the administration-by-Batphone system and the same low-tech solution they've used for 80 years. Like the US Air Traffic Control system, everyone is afraid to upgrade to computer control because they don't trust the electronics.

  4. Actually, the world's largest machine... by cliffy2000 · · Score: 2, Interesting

    Would imply that there's some sort of net work (read net_work, not network) being done. The electric grid spanning the continent produces no net power because of the consumption taking place. Yes, individually the plants are machines, but taking the composite grid into perspective, it is no longer a machine.
    Sorry. I like arbitrary semantics.

    1. Re:Actually, the world's largest machine... by Eucaryont · · Score: 2, Informative
      Where did you get the idea machines have to generate 'net power'?

      machine

      n 1: any mechanical or electrical device that transmits or modifies energy to perform or assist in the performance of human tasks

  5. Re-Regulate? by sssmashy · · Score: 4, Insightful

    To pay the extensive costs, the utilities and the DOE advocate increases in utility rates. The costs involved would certainly be in the tens of billions of dollars. Thus, deregulation would result in large cost increases to consumers, not the savings once promised.

    I think that for many areas in North America, re-regulation is the answer. State and provincial governments should buy grid infrastructure back from the mismanaged, ailing private companies. They could then form public trusts (with the consumers as "shareholders") and contract out the new grid construction to private companies.

    The advantage to this is that a public trust wouldn't be beholden to shareholders and the stock market. They could effectively plan for the long term, rather than shy away from desperately needed capital outlays simply because the managers need to show a profit in the next quarter.

    1. Re:Re-Regulate? by sql*kitten · · Score: 2, Insightful

      State and provincial governments should buy grid infrastructure back from the mismanaged, ailing private companies.

      As Gray Davis demonstrated, politicians never mismanage finances. When a company gets it wrong, the damage is limited to its shareholders, and other competing companies take up the slack. When a state gets it wrong, everyone pays the penalty.

  6. *Not* a single machine. by DerekLyons · · Score: 4, Insightful

    The ultimate problem is that the grid is emphatically *not* a single machine. It's a loosely (some might say poorly) coordinated collection of independent machines and networks. It's not engineered at the system level, or even at the regional level, but rather at the local level with ad hoc interconnects to create larger systems.

    1. Re:*Not* a single machine. by GeoGreg · · Score: 3, Insightful

      Well, I'm not an electrical engineer (IANAEE?), but the fact that disturbing the system in Ohio affects things in New York indicates that the machines and networks are not independent. A and B are only independent if fiddling with A cannot affect B. Those "ad hoc interconnects" make it a single system. Just because it's not engineered at the system level doesn't mean it's not a system. There are continuous electrical connections, made up of many components (transmission lines, transformers, generators, etc), connecting all the pieces of the grid. It may be a Rube Goldberg machine, but it's a machine.

  7. Garage Generators by Doc+Ruby · · Score: 2, Interesting

    Why can't I just plug my car's engine into my house? At over 100KW, the engine outputs >20x my average consumption. And at $2/gallon, that's about $.05/KWh, about 1/3 my utility electric rate. I wouldn't rely on the grid, I'd have a "battery" in the garage. When H2 stacks are affordable, I'd have >10x the fuel economy. How do I hook this up?

    --

    --
    make install -not war

    1. Re:Garage Generators by ikewillis · · Score: 2, Interesting
      One of the great advantages of moving to a hydrogen economy is that cars *would* be able to do this. Specifically, GM's AUTOnomy vehicle contains fuel cells which are capable of generating electrical power for general purpose use, as GM even states on their page:
      "With its robust 42-volt electrical system, the car is configured to run any number of devices in the passenger compartment, from homes to entire farms."
      After moving to a hydrogen economy, and at 95% efficiency, you'd certainly be getting a lot more "bang" for your buck out of fuel cells than you would out of an ICE...
    2. Re:Garage Generators by mt-biker · · Score: 2, Interesting

      Why can't I just plug my car's engine into my house?

      A great idea, and one that gets discussed by Amory Lovins in Natural Capitalism (See chapter 2, "Reinventing the Wheels", about half way through).

      Lots of details to be worked out, of course. What happens when your car's not there? When it breaks down? Do you store energy yourself at home (H2, whatever), or do you rely on the grid?

      What does the grid become? I was shocked (groan... bad pun) to learn how much power the transmission lines lose. What if lots of people are doing the same thing with their cars, and supplying surplus power back to the grid? Then there's not so much power being transmitted over long distances because the power you use is being generated within a mile or so of your house. But can such a system be stable/reliable enough?

      And, of course, we'd need to take a good look at pollution. The idea of everybody's car engines running 24 hours a day instead of 2 hours isn't a pretty one, but we'd need to do the math, and work out how much pollution is being reduced by closing down power plants.

      But since it's already possible to sell power back to the grid in many places, I guess someone is probably already doing just what you suggest...

    3. Re:Garage Generators by palfreman · · Score: 2, Insightful
      "great advantages of moving to a hydrogen economy"

      Hydrogen has an escape velocity sufficiently great to escape the earth's gravitational pull. That means that is doesn't exist naturally on earth. That means that you have to make it from other things. Because hydrogen makes heat (i.e. is exothermic) when burnt, making hydrogen is endothermic, which means you have to put heat in, in other words burn some kind of other fuel. This manufacturing process is necessarily less efficient than just burning the original fuel, whether it be mineral oil/gas, or agricultural products like wood or plant oil.

      This is a matter of scientific law. No amount of environmental wishful thinking can change these laws. You can't have a hydrogen economy. You can talk about it to other people who lack the scietific background to grasp why it can't be done, and you can run cars on the stuff with relatively little conversion. But what you can't ever have is the efficency of mineral or agricultural fuels, becuase necessasily they are used to make the hydrogen in the first place, and that process itself is inefficent.

      Also, you need to see fuel-cells in their proper context, which is as a store of electricity - lightwieght high power batteries. Even if they get the technology right you are still limited to conventional power sources for them, which is either charging them from the power in your house, or charging them somewhere else and changing them often. Both of these are merely enegy displacement, and are still less effecient than burning , say, natural gas in an internal combustion engine.

  8. Armillaria ostoyae by bhima · · Score: 2, Interesting
    This reminds me that the worlds largest living organism is an underground mushroom in the US somewhere.

    No they do not taste good.

    --
    Nothing in the world is more dangerous than sincere ignorance and conscientious stupidity.
    1. Re:Armillaria ostoyae by cerebralsugar · · Score: 2, Informative
      --
      Easy guys, I put my pants on one leg at a time. The difference is after I put on my pants I make gold records!
  9. The Socialist solution... by ikewillis · · Score: 4, Insightful
    would be the nationalization of the power grid. That is, the government would take control of all properties owned by current energy companies for the purpose of electrical production and distribution (which would most likely involve financial compensation for the property) and would work to make the power grid as robust as possible.

    This sounds somewhat crazy, but the necessity is beginning to show itself. The blackouts in California... the collapse of Enron... the East Cost blackouts... the recent collapse of NRG Energy... is the power grid really safe in the hands of private enterprise?

    The power grid is a resource upon which we are all vitally dependant. Therefore, shouldn't we work to make it robust as possible?

    Does it really make sense to have 300 little monopolies controlling the power grid instead of one big monopoly, the government itself?

    Who says that the government can do better that private enterprise? Well, in the wake of deregulation, we've all seen what too much motivation from profit can do to the power grid. The sweeping general move towards deregulation have had terrible effects on all aspects of our life. Following the deregulation of radio, the majority of radio stations in the US were purchased by an enormous media conglomorate called Clear Channel, which is essentially a monopoly (with the exception of Cumulus Broadcasting and others) and all stations were given playlists. Call in contests were nationalized, so now you have to be a certain numbered nationwide caller. It's everything Rush sang about in the Spirit of Radio all over again...

    So, give nationalizing the power grid a try! When you've hit rock bottom, all you can do is go up...

    1. Re:The Socialist solution... by sybert · · Score: 5, Insightful

      The socialists never know when it's time to upgrade capacity until after it's too late. In California, the utilities did not build any new generation for about twenty years before de-regulation (and even paid money to not build new generation). The private generators started building capacity only after de-regulation, and were not able to finish before the power was most needed. If CA had deregulated sooner there would have been no problem. Plus the braindead CPUC insisted on charging very low consumer rates when wholesale rates were highest and now are charging very high rates when wholesale rates are very low. California is a great example on how to completely bungle regulation surrounding deregulation.

      Getting government involved is the best way to block the next round of expantion necessary. We just need to make sure that companies that are sucessful can expand and take-over those that are unsucessful without disruption.

      Despite consolidation, there are now more radio stations then before. Plus it's our fault that we choose to listen to centrally controlled radio rather than locally programmed stations.

    2. Re:The Socialist solution... by cardpuncher · · Score: 2, Informative
      The energy supply system here in the UK used to be owned by the government (post-war socialism) and was privatised by the Thatcher government partly as a matter of dogma and partly because it was seen as "over-engineered" and bloated.

      It was replaced by a single grid company, local distribution companies and generator companies. Power was bought on a complex "pool" system in which generators bid to provide power in various timeslots and the lowest bids were accepted. This was gradually changed and now consumers choose which company they buy their power from and the "pool" has become considerably more complex as a result.

      One of the effects of this is that a large number of power plants have been mothballed or dismantled as they are too inefficient to compete with newer gas-powered stations during the summer months and cannot consequently provide an economic return. Unfortunately, this means that there is a severe danger that there will be insufficient generating capacity in the winter: the National Grid has already issued a warning for 2003-4.

      You can have cheap power or reliable power, but not both: to have the latter to need slack, or "bloat" in the system. If you want reliable power, you have to have some sort of central authority exercised either through ownership or through regulation. Either solution is likely to be resisted by politicians (who wants to be responsible for the power going out?) until there's a major calamity.

    3. Re:The Socialist solution... by Hard_Code · · Score: 2, Insightful

      The great thing is, we DON'T NEED a centralized solution:

      1) decentralized/localized power generation
      2) alternative energy sources
      3) more stable power grid
      4) more jobs
      5) $$$!

      This problem can be solved by smaller, more efficient (either alternative energy, or reduction in transmission distance inefficiencies), localized power sources. Each of the nodes is not necessarily very stable, but because there are so DAMN MANY of them, it would be very hard to have a large blackout like the entire east coast. Sound familiar? ;)

      Big oil/energy of course will fight this with all it has, with commercials that tout how they are valiently "exploring" the oceans, or how they have "cleanburn" this or that. But alternative energy industries will CREATE JOBS. Imagine that, more companies building new types of energy plants, more support personnel, more consumer-related products, etc. Even if you are conservative you don't have to believe in froo-froo tree hugging nonsense to see that moving incentives from the current centralized unreliable system to new sources/decentralized systems will create new businesses (you like that remember), and jobs.

      Just look at what is happening with the "organic" trend. Midwest and small time, traditionally conservative, farmers found out they can profit MUCH more by selling expensive "organic" stuff.

      For an administration that is pro-defense you'd think they'd start looking at how to protect our critical infrastructure at a fundamental design level (the whole reason behind the 'net to begin with).

      --

      It's 10 PM. Do you know if you're un-American?
  10. The stock market idea was dumb by hey · · Score: 3, Insightful

    Quoting...

    In the view of Casazza and many other experts, the key error in the new rules was to view electricity as a commodity rather than as an essential service. Commodities can be shipped from point A through line B to point C, but power shifts affect the entire singlemachine system. As a result, increased longdistance trading of electric power would create dangerous levels of congestion on transmission lines where controllers did not expect them and could not deal with them.

  11. The problem is political more than mechanical. by ahfoo · · Score: 4, Insightful

    No doubt there are mechanical issues that weren't accounted for with deregulation, but the political issues are far more complex than the mechanical problems. If this wasn't the case, there would never have been an Enron.
    From its origins electricity has been a utopian technology emerging into a world that is staunchly opposed to utopian solutions.
    The industrial revolution was exactly that, a revolution and the development of the steam turbine led to prices so low that it seemed electricity would sweep the world in a matter of decades powering every manner of device. Just look at the movie Metropolis. Clearly these expectaions of a great high tech all electric future started long before any of us were born.
    Take, for example, the Nazis. One of the things that gave the people such hope during the rise of the national socialists was the promise of electrochemistry. With nothing but air, water and electricity they would live in a world of plenty.
    After the Second World War it was nuclear power and unmetered electricity. Near the town where I grew up on the Central Coast of California there was once a billboard outside a small town called Nipomo that advertised the coming age of unmetered electricity.
    Then when the problems of nuclear fission became apparent it was fusion just around the corner.
    An amazing fact is that all these promises are true. Turbines are amazingly efficient, electrochemistry does work and so does fission and fusion too. But as real as all these technologies are, they overlook the political side of things.
    If the real goal was just to provide cheap electricity and everybody agreed, it would be quite simple. We'd just connect the world's grids together and reduce the need for peak load by using existing capacity efficiently. But that's too utopian and it's overlooking the reality of power politics.
    The reality is that as a society we advocate greed. Really you can't blame the Enron people. They were just doing what they believed to be the right thing --fuck everybody. Competition has become a moral value in its own right. In a society that holds greed as a value the problem is not merely mechanical.

  12. Re:The world's biggest machine... by lanswitch · · Score: 2, Insightful

    But since the electric net plays a fairly important role in making all the routers, servers, and millions of clients, including wireless devices work you cannot see the two apart... So to me it seems a non-issue : they both are connected and dependant on each other. Since the internet is used to connect electrical equipment all around the globe you could say that we have a global electric-powered information machine. And that is the real news here.

  13. Blind faith in free markets again by divec · · Score: 4, Insightful
    This is another example of what happens when you blindly assume that a "free market" will solve everything. For a free market to work effectively, certain axioms need to hold, such as:
    1. Easy entry into the market
    2. Good information available about buyers / sellers
    3. Freely exchangable goods

    etc. In this case, rule #3 broke - it's complex and error-prone transporting electricity between different sections of the grid. The fact that one of the fundamental axioms doesn't hold should be enough to stop policy makers assuming that a "market" is the best solution. This kind of analysis should be done whenever regulation of any utility is examined.
    --

    perl -e 'fork||print for split//,"hahahaha"'

  14. Ice Storm Blackouts by pipingguy · · Score: 2, Interesting


    Electrical power going out in the northern united states and Canada for an extended period of time during winter would kill hundreds of thousands of people.

    I suggest that the system be reconfigured and backed-up so as to default to providing emergency power to those regions for the months of November through March.

    The boiled frog scenario aside, no one ever died from being too hot.

    1. Re:Ice Storm Blackouts by DaveTheTriffids · · Score: 2, Informative
      > no one ever died from being too hot.

      Lots of people die from being too hot.

      15,000 died as a result of a heatwave in France this summer, and 2,000 died in the U.K..
    2. Re:Ice Storm Blackouts by Farce+Pest · · Score: 2, Funny
      15,000 died as a result of a heatwave in France this summer, ...

      Well, he did mention "the Boiled Frog Scenario"...

      --
      This message has been scanned for memes and dangerous content by MindScanner, and is believed to be unclean.
  15. Pattern is all too obvious by ozzee · · Score: 5, Insightful

    Incompetance of management. It is abhorrent to see how the information is provided to the decision makers yet the people without the knowledge end up overriding those with the knowledge.

    These are some high profile events where the risks where well known.

    Both Columbia and Challenger shuttle losses
    Here the engineering team informed management multiple of the risk and yet the management failed to act on the information provided.

    The great blockouts of N.E. U.S.A. 1965 and 2003. The risks were well known yet the politics got in the way.

    9/11 Terrorist attack - there were numerous signs and the FBI was too worried about politics rather than listening to their own people.

    This is not unique to today but it is getting more and more difficult for people to understand.

    In the technology industry I find myself "fighting" to unleash the truth and attacked because I simply state the facts as they are.

    OK, too bad if a company messes up a product but sometimes it is significantly detrimental - take the Union Carbide toxic disater in Bhopal.

    How do we effect a change for there to be more recognition for this ? The risk/reward trade-off for those with the knowledge are often dispropotionate : RISK: Public humiliation and the death of thousands of innocent people. REWARD: A certificate of appreciation in a handsome plastic frame.

    That's it, I'm going to start collating references to stupid management decisions causing untold damage because of management ignorance. Please post your examples here.... I'm going to use it next time I get into a knowledge vs ignorance argument.

  16. Learn from market failure by AlecC · · Score: 4, Insightful

    Generally I am a fan of the market system. Historically, market systems have outperformed regulated systems over and over again. But, as this excellent articla shows, in this case the market system has failed us. I would like to examine why this is so.

    As I see it, we are buying two commodities for price. We are buing raw power and security of supply. But the prices are set only for raw power. The electricity companies could justifialby say that they had plenty of power available the day before the blackout, and the day after, and you chose not to take it. But, you cry, I wanted a continuous supply I could depend on. They reply, where did you pay for that continuity of supply? You only paid us for power, not continuity of power.

    In any business, there is a cost to reliability. An airline may have a spare plane, so that if one develops a fault, they can still fly. But if two develop a fault, there are going to be cancellations. They choose to accept some level of risk rather than run an infinite fleet to take occare of very rare multiple failures.

    If there is one day of power cuts, the power companies lose 1/365 of their annual revenue; perhaps a bit more, because it is likely to happen at the peak, most lucrative, period; say 1/200. How much capital, in a free market system, are they going to invest to squeeze that last 0.5% of revenue? I think they would realistically set an acceptable level of power cuts and just say "You get that" to consumers.

    So what we need to is to monetize security of supply, and make a market in it. Get the domestic meter updated so that it can be switched off remotely (my system already does that for overnight heating, using a signal embedded in a long-wave radio station). Require the utilities to offer, at a price that they choose, to offer at least two levels of reliability. Thise who choose the lower level can be cut off when they system approaches failure, leaving more power for those who have chosen to pay more for greater reliability. Those who choose the higher level are providing the funding to pay for reliability improvements. If nearly everybody chooses one level or the other, the market has sent a signal to the system, and a new higher or lower level should be created.

    --
    Consciousness is an illusion caused by an excess of self consciousness.
  17. VERY slippery slope by IntelliTubbie · · Score: 4, Insightful
    If you think the power grid argument is safe, then try these on for size:
    1. The Internet is really one giant machine, so computer use and information exchange should be controlled by the government -- otherwise, there will be even more viruses and spam and piracy.
    2. The economy is really one giant machine, so the government should control industry -- otherwise there will be even more recessions and labor strikes and market crashes. That would never happen in a centrally-planned economy.
    3. The government should control speech, otherwise people might express ideas that are damaging to the "machine" of human society. Without regulation, we'll just have more dangerous ideas like racism, communism, and (insert your favorite religion here).

    Issues of freedom and control aside, who really trusts the goverment to run something complicated and critical? They can barely get the simple things right. At least private industry has profit as a motive to keep the grid running. What's the government's motivation -- sheer good will? The grid already has too many single points of failure, and the last thing we ought to do is put it in the hands of a single authority.

    The best solution is the same one a lot of geeks would support on any other issue: keep it open, keep it decentralized, and if there's more than one way to do it, let the user decide.

    Cheers,
    IT
    --

    Power corrupts. PowerPoint corrupts absolutely.

  18. Texas should stay disconnected! by anwyn · · Score: 2, Insightful

    This gives one more reason why the people of Texas should at all costs keep Texas off of the national grid. Not only would such a interconnect expose Texas to greater federal regulation by putting power activities in Texas in interstate commerce, the interconnect would inevitably be used to drain power from Texas driving up the cost of power there only to subsidize the pointy headed elitist parasites of the Northeast. In addition to these existing reasons it now seems it would expose Texas to blackouts to boot!

  19. The UK National Grid by Hittite+Creosote · · Score: 2, Informative
    National Grid Company plc is the owner and operator of the high voltage transmission system in England and Wales. The company is a wholly owned subsidiary of National Grid Transco, which is listed on the stock exchange and is one of the UK's FTSE 100 companies.

    Transco also own GridAmerica, for their opinion on the blackout, see this press release

  20. First have to define what wasn't working by sphealey · · Score: 4, Insightful
    Investor-owned (private), state-regulated, geographically compact and exclusive electric utilities provided stable supplies of electricity to North America at decreasing real cost from 1920 to 1990 (there was a relatively small cost problem from 1978 - 1982, but that was true of most of the US economy). Electricy use (and therefore supply) doubled every 7 years from 1880 through 1960 or thereabouts, and continued to grow pretty fast after that time.

    Given that, I think it is incumbent on the deregulators to explain exactly what was "broken" with this system and what their "fix" was intended to accomplish. Yes, there was some fat and inefficiencies in the regulated utility model (I was there in the 80s), and some new incentives were needed to help address those problems. But again, increasing supplies of reliable electricity were being provided at decreasing real cost. Has that been true since the wonders of deregulation took hold?

    Of course, one of the real "problems" that electric utility deregulation addressed was that no one involved in the process was earning 200% gross profit margins. I have to wonder if the real "pressure" was not from those who wanted greater efficiency due to competition, but those (such as Enron) who wanted to skim off more cream from an industry that was limited by law to around 12% gross.

    sPh

  21. Misunderstandings about the Hydrogen Economy by raygundan · · Score: 2, Insightful

    Just to clarify, the idea of a Hydrogen Economy *does not* use hydrogen as a fuel in the sense that we are used to. The idea is to use hydrogen as a storage and transport mechanism for energy.

    Of COURSE it's not efficient to turn fossil fuels into hydrogen and then burn the hydrogen. There will be losses with every additional step. It is, however, possible to get your hydrogen from other sources. A couple of solar panels used to electrolyze water (you get the water back when you burn the hydrogen) are only one example. The idea is to start now by switching infrastructure over to handling hydrogen-- which is far cheaper and easier than a wholesale transition to somtehing else. Older cars can still get gas at a gas station while their newer counterparts will get gas and use a catalyst to convert it to hydrogen. As the newer cars become more common, stations will begin to carry pure hydrogen, which eventually will be made more efficiently via nuclear, solar, hamsters, etc...

    Anyway-- as you said, think of hydrogen as a battery, not as a fuel. How efficient it is depends entirely on how efficient the process was that created it.

  22. You're sooo wrong about fuel cells. by caveat · · Score: 3, Informative

    An orbiting array of solar cells with intense microwave power transmission downlinks to mid-ocean electrolysis plants. Not feasible now, but in the next 10, 20 years it could happen.

    Your entire last paragraph is wrong. Fuel cells are not batteries; they do work on the same very basic electrochemical rules, but a fuel cell doesn't have a self-contained store of reactants; also, fuel cells use the much more energetic 2 H2 + 02 -> 2 H2O reaction, instead of a lower-energy ionic redox reaction like batteries (If I'm speaking Greek, get an intro chem text and read up on electrochemistry, then look at the potentials for various half-reactions). AFAIK, it's also impossible to build a "rechargable" cell that will take H2O and electricity and spit out H2 and O2; it is possible to build a rechargable battery. Fuel cells are actually a hell of a lot (potentially an order of magnitude) more efficient than internal-combustion engines; fuel cells go directly from chemical energy -> electrical energy, while an ICE has to go chemicals -> thermal -> mechanical -> electrical energy.
    Now for the numbers *hunts down PChem text (PW Atkins, Physical Chemistry, 7th ed.)* OK, the maximum theoretcal efficiency for a Carnot cycle engine is around 80%, depending on the delta-T between the engine and the environment; 80% is reached at around 900-1100C, at less than 100C it's limited to around 20%. Fuel cells are more efficeint at lower T, theoretically greater than 90 percent at less than 100C. Here's a pretty good summary page; the bottom graph is really good. Brush up on your thermodynamics, you're a clearcut case of a little knowledge being a dangerous thing :P

    --

    Facts do not cease to exist because they are ignored. - Aldous Huxley