The Hydrogen-Powered Future
Visionary Amory Lovins foresees a world of clean, cheap, reliable energy--and it's a gas.
Drive up a country road winding between horse pastures, cross a small bridge, then climb a gravel lane, and you can reach a house that seems to defy the laws of physics. About 70,000 visitors have flocked here since it was built in 1982. The curved, 4,000-square-foot sandstone-faced structure in Snowmass, Colorado, has neither heating nor air-conditioning systems, yet is comfortable in temperatures ranging from -47 degrees Fahrenheit to at least 90. Two wood stoves contribute about 1 percent of the heat, but solar energy provides the other 99 percent of space and water heating. The household electric bill would average $5 per month, except that the solar panels generate five or six times that much electricity; in sunny months, in fact, the house earns money by selling its excess power back to the grid. The walls are "superinsulated" to twice the normal level of effectiveness and the stormdoors and windows do even better: four to six times the norm. The place holds warmth so well that on most nights, "We've heated the house with a 50-watt dog," says the home's energy designer and owner-builder, Amory Lovins '68. "On really cold nights we'd adjust her to a 100-watt dog by throwing a ball."
|Amory Lovins (above) leads a globetrotting life, but has lived in the same house (below) in Snowmass, Colorado, for more than 20 years. The home is a solar-powered marvel of energy efficiency, and even boasts a tropical garden that grows bananas and papayas within the glassed-in atrium.|
|Photographs courtesy of the Rocky Mountain Institute|
Here in the Rocky MountainsLovins's home is 7,100 feet above sea levelthe air is cleaner, the vistas longer and grander than those at lower altitude. Historically, mountains have been a kind of intellectual habitat, an elevated place for meditation, philosophical contemplation, the recognition of large patterns. (Think of Robert Frost in Vermont, or Nietzsche hiking the Swiss Alps.) Perhaps the higher viewpoint helps reveal systemic principles that are invisible at sea level, where the world's major cities, with their commercial bustle, offer narrower horizons.
Lovins fits into the tradition of alpine thought: he thinks big and perceives patterns that most sea-level thinkers have missed. Yet Lovins is anything but detached from the real world of profit margins and balance sheets. He travels constantlyconsulting, teaching, advising, and starting projects with such determinedly sea-level enterprises as multinational corporations, real-estate developers, automakers, and the Pentagon.
Lovins has a vision of our energy future: nothing less than shifting our primary fuel from oil to hydrogen. While many doubt hydrogen's potential to power cars, heat homes, and run industries, Lovins declares that the hydrogen economy is comingit's not a question of if, but when. His goal is to bring the benefits of hydrogen on-line soonand he considers that a very viable prospect.
There's a team behind Lovins: his miraculous home doubles as headquarters for Rocky Mountain Institute (RMI), the nonprofit research and consulting firm that he and his former wife, L. Hunter Lovins, founded in 1982 "to foster the efficient and sustainable use of resources." Although RMI is surely a green organization, its client list represents what some environmentalists would call "the enemy"RMI has worked, for example, with 65 of the Fortune 500. Yet such clients lend RMI's innovative ideas a real-world muscle that many green purists might envy.
Lovins' optimistic futurism contrasts strongly with the dour, "everything-is-going-to-hell" outlook common in environmental politics. Yet even though most energy specialists admire Lovins's brilliance, many question his pragmatism. "Amory is like a mystic, a guru," says Littauer professor of public policy and administration William Hogan, an energy economist at the Kennedy School of Government. "He has been broadly right for a long time. The rub is when you get down to the detailscan it be implemented?"
Similar questions were asked of Lovins's intellectual forebear, R. Buckminster Fuller '17 (1895-1983). Both men dropped out of Harvard and set out to change the world, not with political action but through superior design. Unlike political movements, intelligent design has no real opposition: an organization, whatever its ideology, will typically vote with dollars for anything that trims expenses while improving performance. (Fuller made smart design ever smarter, continually finding more efficient solutions: his last geodesic dome, built in 1983, which ornaments a meadow next to an RMI building, is structurally stronger than conventional models, despite using 40 percent less material.)
Lovins endorses Fuller's notion that intelligent design allows one to "do more with less, better, for longer." His personal style is more subdued than the headlong, kinetic energy of Fuller. Yet Lovins's unruffled, almost diffident manner cloaks a first-rate intellect. When he casually drops an astonishing, counterintuitive observation into the conversation, he peers from behind his glasses as if to ask, "How 'bout that?" He often seems amused by his own conclusions, and has a casual deadpan delivery. In his house, a pile of stuffed toy orangutans in the foyer greets visitors; Lovins calls his troop of primates "taxidermically challenged."
The Making of a Visionary
The prodigy Lovins, who was born in Washington, D.C., and attended public schools in Amherst, Massachusetts, arrived at Harvard in 1964 having already done "most of undergraduate physics," he says. His proactive instincts were already alive: he took a special freshman seminar with the Nobel Prize-winning physicist Edward Purcell that, he says, "was open to all freshmen named Lovins." Due to some knee problems, he left college at the start of his second year and began mountaineering to help strengthen his kneesa pastime that helped crystallize his environmental interests.
Lovins returned to Harvard in 1966, only to drop out permanently after his sophomore year, "largely because I ignored the normal curriculum structure," he explains. "I very much enjoyed my classmates and had some wonderful teachers, like Albert Lord on oral literature and Paul Freund on constitutional law, but I refused to pick a concentration. Chemistry, physics, linguistics, law, and medicine all interested me. Also musicpiano and composition. I thought the world had too many specialists and I wanted to be a well-rounded generalist."
In 1967 Lovins migrated to Magdalen College, Oxford, where "they don't breathe down your neck and let you study a lot of things," he says; two years later he became a don at Merton College, Oxford. He was already interested in energy and land-use problems, and in 1971 wrote and took many of the photographs for a book on an endangered national park in Wales, commissioned by David Brower, president of Friends of the Earth and "the greatest conservationist of the twentieth century," in Lovins's estimate. Lovins went to work full-time for Friends of the Earth, living in London and, when stateside, guiding mountaineering trips in the White Mountains of New Hampshire.
In a celebrated 1976 article in Foreign Affairs, "Soft Energy Paths," the 28-year-old Lovins outlined an alternative future where efficient energy use and renewable energy sources like wind, solar power, and biofuels (the "soft path") gradually but steadily supplant a centralized energy system based on fossil and nuclear fuels (the "hard path"). By 1978 he had published six books, consulted widely, and was "active in energy affairs in about 15 countries as synthesist, lobbyist, and cross-pollinator of grapevines," as he wrote in his tenth-reunion report.
In 1979 he married L. Hunter Sheldon, a lawyer, social scientist, and forester; they built their energy-efficient house in Snowmass and in 1982 founded RMIwhich has since grown into a $5-million organization with a staff of more than 50 and branches in Boulder and Hawaii. For Lovins, 100-hour workweeks have largely supplanted diversions like music, poetry, squash, and mountain photography. Yet in person he does not appear stressed or harried, even though he is now spread thinly across 50 countries and involved in a dizzying stream of activities. His biography, posted on the RMI website (www.rmi.org) explains that his work "focuses on transforming the automobile, real estate, electricity, water, semiconductor, and several other manufacturing sectors toward advanced resource productivity." Lovins has briefed 18 heads of state and written or coauthored 28 books, the latest of which are Natural Capitalism (with Paul Hawken and L. Hunter Lovins), a favorite of former president Bill Clinton, and Small Is Profitable, a 2002 Economist Book of the Year.
Over the years, the honors have piled on. Lovins has received eight honorary doctorates, a MacArthur Fellowship, and a slew of awards. Time named him a Hero for the Planet and Newsweek called him "one of the world's most in fluential energy thinkers." Car magazine designated him the twenty-second most powerful person in the global auto industry. Ironically, although Oxford granted Lovins an M.A. by Special Resolution in 1971 (since he was a don), he still lacks an undergraduate degree. In that 1978 reunion report, he wrote that Harvard "is still not freewheeling enough for generalists...still reluctant to prepare its graduates to contribute new insights to great public issues." If so, perhaps he was right to drop out; he has certainly brought new insights to the realm of energy.
The End of the Fossil-fuel Economy
The energy landscape that Lovins sketches begins with much more efficient use of petroleum; he identifies many ways of drastically reducing our oil consumption with no sacrifice in standard of living. Lovins advocates a transformation in all the forms of energy we usenot only those that run our cars, but those that heat, light, and power our buildings. Over time, he sees renewable sources like wind and solar energy gradually supplanting fossil fuels. A less familiar but even more powerful piece of the transformation is hydrogen energy, which might eventually make oil and natural gas wells obsoleteand, while they last, more profitable. Hydrogen could potentially generate heat and electricity for homes and office buildings, as well as electrical power to drive a new kind of automobile. Lovins envisions a future in which huge, centralized power plants give way to a decentralized system of small, hydrogen-fed fuel cells making electricity at the point of use. And cars ride cleanly and silently on freeways in a country that doesn't import oilor use it.
Petroleum, the propellant of the modern economy, entered the energy market only in 1859, when a man wildcatting in Titusville, Pennsylvania, struck oil. But the evolution of technology and the depletion of natural resources are pushing the world's economies beyond oil. Last summer, in a talk at the Given Institute in Aspen, Lovins bluntly declared, "Four oil company chairs and several major automakers have all said we are in the endgame of the oil economy and the beginning of the hydrogen era."
"These are companies that think ahead 50 years," he explains in an interview. "Some, like Shell, have arguably the best foresight of any institution, public or private." Lovins cites a published 2001 Royal Dutch/Shell scenario that calls for oil consumption to stagnate until 2020, then drop steeply. "Whole countries leapfrogging to hydrogen-powered vehicles will displace oil," he says, agreeing with Shell's idea that China could lead the charge. With its huge population, China embodies a strong argument for weaning the world from petroleum. "If the Chinese were all to start driving gasoline-engine cars," Lovins says, "you'd need another Earth."
Any weaning process involves reducing dependence on the prior source of nourishment. The United States, which has 4.5 percent of the world's population, produces 9 percent of the planet's oil and consumes 25 percent, but owns only 2 or 3 percent. Two-thirds of the world's oil reserves are in the Mideast, although Russia, Mexico, and Venezuela are big producers. But petroleum enjoys a different tax status in this country than it does in the rest of world. European nations, for example, tax gasoline far more heavily than the United States does, and therefore retail prices in Europe are typically three to four times those over here.
Lovins sees enormous potential energy savings in efficient use, which could greatly diminish our dependence on petroleum imports. But saving on energy consumption is generally about as popular with Americans as putting aside money; President Ronald Reagan, a onetime General Electric spokesman, famously equated energy conservation with "freezing in the dark." (It has not worked out that way in the warm, well-lit Lovins residence, which is not only super-stingy with fuel, but includes a solar-heated hot tuband an indoor tropical garden that grows bananas and papayas.)
To Lovins, efficiency means living well while reaping the rewards of "negawatts," his term for watts of saved energy. Negawatts leverage even larger savings upstream in energy production. Typically, it takes three or four units of fuelcoal, oil, or natural gasto produce one unit of electricity delivered to a customer's home. So the homeowner who adjusts his refrigerator and conserves, say, one kilowatt-hour of electricity might save the equivalent of four kilowatt-hours of fuel at the power plant.
Energy specialist Jonathan Koomey '84, a staff scientist at Lawrence Berkeley National Laboratory currently serving as a senior fellow at RMI and MAP/Ming visiting professor of energy and environment at Stanford, explains that in our current power system, two major losses of energy occur during the journey from natural resource to user. First, about two-thirds of the energy in fossil fuels burned in older steam plants is lost as heat and does no useful work. In newer, combined-cycle plants, which use both steam and gas-turbine generation, this loss totals less than 50 percent. Such combined-cycle plants have monopolized new construction for the past five to 10 years, but still represent less than 20 percent of U.S. generating capacity. Second, there's a 6 to 10 percent loss in the transmission and distribution of electricity from the power plant to the consumer. Overall, then, somewhere between half and three-quarters of the innate energy of the fuel gets lost without turning on a single light. From this comes the power of the negawatt: save one unit of electricity at the point of end use, and a multiplier effect ripples backward to save two to four units of fuel energy at the production end.
At least two states, California and Oregon, actually reward public-distribution utilities for helping consumers make negawatts. ("The other states reward them for selling more power," Lovins notes.) In 1992, for example, California's biggest private utility spent more than $170 million to help consumers save electricity. That generated nearly $400 million in savingsof which 89 percent went to consumers in the form of lower bills, and 11 percent, in the form of higher dividends, to the stockholders, who also avoided the investment risk of building generating capacity. This shared-savings arrangement "added over $40 million to the bottom line in 1992the second-biggest source of profit that yearat no cost or risk to the company," Lovins explains. "And it changes the culture when you align the incentives of providers and customers."
Ratchet negawatts up to global-scale economics. During the period from 1977 to 1985, which Lovins calls "the last time we paid attention to oil consumption," the United States improved the average fuel economy of its domestically made new cars by 7.6 miles per gallon. During those eight years, the American economy grew by 27 percent, oil use fell 17 percent, oil imports fell 50 percent, and imports from the Persian Gulf dropped 87 percent. Then the price of oil dropped, the SUV invasion began, and American cars resumed guzzling gas. But "The 1977 to 1985 experience broke OPEC's pricing power for a decade," Lovins asserts. "If we had kept that pace up for one more year, by 1986 we wouldn't have needed a drop of oil from the Gulf. Or if we had resumed doing that in January 2001, by May 2003 we'd have eliminated as much oil as we import from the Gulf."
Now take efficiency a step further, to autos powered by hydrogen fuel cells, which might cruise at 100 miles per gallon, making the U.S. light-vehicle fleet five times as efficient. "We could save eight to 11 million barrels of oil a day," Lovins says. "It would be like finding our own Saudi Arabia under Detroit. And if everyone in the world drove fuel-cell cars, it would be the equivalent of a nega-OPEC."
Such an energy revolution would dramatically shift the tectonic plates of international politics and economics. Oil imports would cease to be a factor in American foreign policy. The United States might no longer be the odd man out in international environmental agreements. And Lovins insists that the switch to hydrogen would not strand past energy investments: oil-dependent economies like Mexico and Russia, he says, "will make more money from the hydrogen in oil than from oil itself." A less oil-thirsty United States might be a good thing for the world, and also a boon for developing nations, which go heavily into debt to buy oil at prices this country bids upand because, as Lovins says, "A good predictor of instability in developing counties is the discovery of oil."
So how might we power a post-petroleum world? First, Lovins says, forget about nuclear power. "Nuclear power died of an incurable attack of market forces," he explains. "Not one investor showed up this year at the American Nuclear Society's Nuclear Revival conference. New nuclear energy costs twice as much per delivered kilowatt-hour as wind power, five to 10 times as much as coproducing electricity and heat from natural gas in buildings and factories, three to 30 times as much as electric end-use efficiency. Furthermore, you can't have nuclear power without nuclear proliferationbut even that argument becomes super fluous when you realize it's the most expensive way to make electricity." (And, he adds, electricity is unrelated to the U.S. oil problem: only about 2 percent of our electricity comes from oil, and only 2 to 3 percent of our oil makes electricity, nearly all of which comes from coal, natural gas, water, and nuclear power.)
Wind is another story. By 2002 there were 31 billion watts of wind power operating worldwide, and windpower has been growing by 20 to 30 percent annually. In plains areas, the potential is especially great. "In tribal lands in the Dakotas," says Lovins, "the windpower potential is equal to half of all the U.S. generating capacity." Jonathan Koomey agrees that "wind's potential is pretty largeon the order of our total national electricity use. In Great Britain, it might even be several times national electricity consumption, due to the favorable wind conditions surrounding the British Isles."
Wind, however, is variable. Koomey points out that you can build a megawatt of wind-power capacity, but it might produce only 30 to 35 percent of the time, whereas a traditional power plant can operate 65 to 80 percent of the time, and at any desired hour. But an intermittent energy source like wind can become a steadier, more valuable stream of both energy and revenue if supplemented by load management (letting people choose when they use electricity), hydropower, storage, or hydrogen energyand renewable sources like wind and solar energy don't pollute or diminish. Furthermore, says Lovins, "The god of energy does not raise the price of sun or wind." Consequently, such power sources avoid the costly financial risk of volatile fuel prices, making them more profitable. With an eye to that upside, General Electric purchased Enron's windpower division after that conglomerate's breakup. The world's largest windmill maker, the Denmark-based Vestas Wind Systems, controls about a third of the market; its share price has increased twentyfold in the past three years. One-fifth of Denmark's electricity comes from wind, and the windpower industry there employs three times as many people as the electric utility industry.
Today, sources like wind and solar power "are expensive," says William Hogan. "With subsidies, it's easy to develop technologies that produce energy expensively." Currently, hydrogen power is costly, too, and its future may depend less on science and engineering than economics. The executive director of fuel-cell activities at General Motors, Byron McCormick, has compared building a hydrogen infrastructure in this century to investing in railroads in the nineteenth century or interstate highways in the twentieth. "There'll be a point in timemaybe it's a year or two away," he told the Wall Street Journal, "where these kinds of how-do-you-get-it-funded decisions [paying for the infrastructure] will be more important than the technology."
The Soft Path of Hydrogen
Hydrogen makes up three-quarters of the matter in the universe. It's a highly sociable gas, quick to combine with other substances, and hence in nature is never found by itself. Having atomic number one (each hydrogen atom has a nucleus of one proton, with a single electron in orbit), hydrogen is also the lightest element, making it a fugitive substance that disappears by floating away if not by forming compounds. The word hydrogen comes from a Greek word meaning "water former," and of course the most important hydrogen compound for humans is H2O.
Unlike sun, wind, water, petroleum, and coal, hydrogen is not an energy source, but rather an energy carrier. An energy carrier is a way of transmitting energy, not creating it. While crude oil is an energy source, gasoline is a carrierit provides portable mobility fuel. Electricity, which can transmit energy over hundreds of miles, is a pure carrier. (We cannot yet make use of the static electricity in the aire.g., lightning bolts. In that form, electricity would become an energy source.)
Hydrogen is the most concentrated energy carrier in the universe: 2.2 pounds of it can carry the same energy as 6.2 pounds of gasoline. That's a key reason why liquid hydrogen makes excellent rocket fuel. Unlike electricity, hydrogen is easily stored in large amounts as a gas or a (costlier) supercold liquid. Hydrogen doesn't support life, but it is nontoxic. Though it is seldom burned as a plain fuel like coal, hydrogen gas can burn, but requires four times the concentration of gasoline fumes to ignite. When it does burn, hydrogen's clear flame produces only heat and waterno choking smoke or soot, which are carbon products. Another safety advantage is that its clear flame cannot sear skin at a distance.
In a sense, we are already two-thirds of the way toward a hydrogen economy, because more than two of three fossil fuel atoms we use today are hydrogen (the rest are carbon). "Hydrogen is actually worth more without the carbon attached than it is with the carbon," says Lovins. Consequently, converting from a fossil-fuel energy economy to a hydrogen economy, he asserts, "will be profitable for everyone, including the oil companies." Worldwide, we are already making, for industrial use, two-thirds of the hydrogen needed to displace the world's gasoline, he says: "We would only need to expand the hydrogen industry by severalfold if hydrogen were used in state-of-the-art efficient vehicles."
The incentives to do that are not yet in place. "I'd be surprised if the economics of hydrogen were competitive with oil," says William Hogan. "Fuel cells are better today than they were 30 years agobut oil is cheaper, too. Getting the prices right is the first step; we have many regulatory rules that dictate energy prices. Price things correctly, and we might see more distributed electricity-generating technology [e.g., fuel cells] penetrating the marketplace."
The economic equation begins with capturing the hydrogen itself, which, given its highly reactive nature, means prying it loose from compounds like water and natural gas. Extracting hydrogen from coal or natural gas is called "reforming" these fossil fuels; currently, the United States converts more than 5 percent of its natural gas output into industrial hydrogen; refineries use about half of that in making gasoline and diesel fuel.
Reforming involves mixing natural gas with steam (which produces at least half of the hydrogen in the reaction). The process also releases some carbon dioxide, which Lovins recommends injecting back into the ground where it won't aggravate the greenhouse effect but can re-pressurize oil or gas wells. Some critics claim that reforming hydrogen from hydrocarbons may cause as much environmental trouble as burning fossil fuels, but Lovins says that following the process through to the end productauto miles traveledproves otherwise. "[A] good natural-gas reformer making hydrogen for a fuel-cell car releases between 40 and 67 percent less CO2 per mile than burning hydrocarbon fuel in an otherwise identical gasoline-engine car," he writes, "because the fuel cell is two to three times more efficient than the engine."
Yet if we create hydrogen only by reforming hydrocarbons, many of the problems of a fossil-fuel economy, such as pollution and scarcity, will persist. Lovins sees reforming as a transitional step. Electrolysisbreaking down water into hydrogen and oxygen by passing an electrical current through itcan also create hydrogen. But electrolysis costs more than reforming hydrocarbons, unless a very cheap source of electricity is available, or the hydrogen is a by-product. Large-scale windpower could probably provide cheap enough electricity, he reckons, and in the Dakotas alone, windpower could make enough hydrogen to fuel, at high efficiency, every highway vehicle in America. There are also experimental processes to make hydrogen using light, plasma, and microorganisms.
Since hydrogen is highly reactive, many wonder about the dangers of hydrogen fires or explosions. Though all fuels are hazardous, hydrogen is probably safer than hydrocarbon fuels. By volume, it weighs only 7 percent as much as air; hydrogen is four times as diffusive as natural gas, and 12 times as diffusive as gasolineso a hydrogen leak rapidly dissipates as the gas rises away from its source.
It's difficult to make a hydrogen-air mix explode. Though the gas does ignite readilya transient spark can set it offit will burn, rather than explode, in open air. A few years ago, NASA scientist Addison Bain investigated the 1937 Hindenburg disaster and concluded that probably no one aboard the dirigible was killed by a hydrogen fire; the 35 fatalities were people who jumped out, succumbed to burning diesel fuel, or were killed by flammable furnishings or the flaming blimp itself. The clear hydrogen flames swirled harmlessly above the 62 survivors, who rode the burning Hindenburg safely to earth.
The fuel cell is the crucial technology that converts hydrogen and oxygen into electricity and heatpowering and heating buildings, machinery, and cars, for example. Fuel cells are hardly new. In 1839, British physicist William Grove reasoned that if an electric current could split water into hydrogen and oxygen, the reverse process of combining the two gases might produce electricity and water. He was right.
|A green fuel-cell stack powers the New York City Police station in Central Park.|
|Clockwise from right: The First National Bank of Omaha's 200,000-square- foot Technology Center boasts modern exterior and interior design and a futuristic power plant of 400-kilowatt fuel cells behind the glass. || |
Courtesy of HDR
Like a battery, a fuel cell is a device for converting chemical energy into electrical energy. Both batteries and fuel cells have positive and negative electrodes in contact with an electrolytean electrically conductive liquid or gas. But batteries are energy storage devices, and they will stop making electricity when they discharge or their chemical reactants are consumed. Fuel cells, in contrast, can produce electricity as long as they are supplied with fuel. While batteries need to be recharged, fuel cells need to be refueled.
The modern fuel cell takes several forms; one of the most popular is the Proton Exchange Membrane (PEM), currently the lightest and easiest to manufacture. It has two electrodesan anode (which attracts negative ions) and a cathode (which attracts positive ones)separated by a thin membrane, typically special polymers dusted with platinum (see diagram, page 34). When a hydrogen molecule (H2) passes through the membrane from the anode side, its electrons (negative ions) are stripped off and can be routed through a circuit as electricity. The protons (positive ions) pass through the membrane to the cathode, where they bond with oxygenand recombine with the electrons that have gone through the circuitto create H2O in a heat-generating, low-temperature chemical reaction. Thus the fuel cell's output is electricity, heat, waterand nothing else, because there's no combustion.
In the 1960s NASA developed fuel cells for use in rockets and they have powered space missions ever since. Not only do they produce clean and ultra-reliable power, but the astronauts can drink the water. In 1966 General Motors produced a fuel-cell prototype car called the Electrovan that had a driving range of 150 miles. Since then, fuel cells have found a range of uses in buildings and specialized applications.
Fuel cells represent decentralized powerthey make electricity on the spot, rather than importing it from distant generators via transformers and long high-tension lines, with sizable losses in transmission. "You want to deploy fuel cells in buildings and vehicles in an integrated fashion," Lovins says, "so each of them makes the other happen faster." Deploying hydrogen-fed fuel-cell cars, however, poses a Catch-22: there is no infrastructure to distribute hydrogen, hence no "gas" stations for fuel-celled carsbut no fleet of hydrogen-powered cars exists, because there isn't an infrastructure to gas them up.
Lovins proposes an ingenious, bottom-up way out of this paradox. There's no need, he says, to build a massive hydrogen distribution network at the outset. (General Motors and Royal Dutch/Shell have proposed building thousands of hydrogen fueling stations at costs estimated from $10 billion to $19 billion; others envision central production and a national pipeline network costing up to $300 billion.) Instead, says Lovins, the transition could work on an "earn as you go" basis, starting with office buildings.
Buildings, he notes, consume two-thirds of the electricity in the United States. Imagine a high-tech operation whose many computers can't afford to go down, and whose standby generators are costly, noisy, and polluting. Unplug this company from the power grid and install instead an on-site natural-gas reformer and a fuel cell to power its headquarters. (There are already more than 100 fuel-cell-powered buildings up and running.) "You could lease hydrogen-ready cars to people who work in or near buildings that have fuel cells," Lovins says. Buildings' power supplies are sized for peak loads that rarely occur; the reformer could easily make more hydrogen than the building actually needsand could sell off the surplus hydrogen, pumping it into employees' cars while they work inside.
It doesn't end there. Private cars spend 96 percent of their time parked, and while waiting around for the commute home, could run their own fuel cells to make electricity and sell it back to the grid, or to the building itselfrecouping much or most of the auto's cost for its owner. "Cars could more than run a building," Lovins asserts. "Each car can send out 25 to 45 kilowatts of electricityenough to run dozens of typical houses. Cars would bring people to work, and then the garage under the building would pay them to park there. It doesn't take that many people! A national fleet of fuel-cell-powered cars would have six to 12 times as much electrical generating power as the whole American power grid does now. Only a small fraction of that fleet could replace all the coal and nuclear plants." Lovins estimates that eventually, converting fewer than one-third of existing American filling stations would be enough to keep the nation's automobiles runningsilentlyon hydrogen, and could cost less than $10 billion.
Furthermore, since fuel cells are such a stable, reliable source of electricity, they could answer a major problem of our vulnerable power grid: the inevitable blackouts. During the massive power failure of August 14, 2003, at least one building in New York City had no problemsthe police station in Central Park, which makes its own electricity with fuel cells. "They decided that it was cheaper than running power lines in there [to Central Park]," Lovins explains, "and they wanted power that would never go off." Fuel cells also keep the computers humming and the lights on at the First National Bank of Omaha, which has a national credit-card business. In 1999, the bank installed two 400-kilowatt phosphoric-acid fuel cells in the basement of its 200,000-square-foot Technology Center, which requires 300 kilowatts of power. One fuel cell is a back-up, and the local power grid is actually the second back-up. The bank wanted an extremely dependable power source (their systems designer claimsand guarantees99.9999999 percent reliability) because having their computers go down could cost as much as $6 million per hour in lost business.
Fuel cells could also strengthen homeland security by decentralizing the generation of power. Centralized power plants pumping electricity downstream to customers at great distances not only waste power in transmission, but are highly vulnerable to terrorist attack. A decentralized system, with smaller amounts of electricity generated close to the point of use, would be far more secure. And fuel-cell technology might also help the military. The 70-ton M-1 Abrams tanks, which get 0.56 miles to a gallon, "can't go fast because their fuel supply can't keep up with them," Lovins says. "The move to hydrogen may be accelerated by the military's interest in ultralight tactical vehicles."
Light, Fast, Strong, and Silent
Between 100 and 300 fuel-cell-powered cars are on the road today, but these are prototypes and experimental cars, far too costly for the consumer market. (Toyota and Honda have leased a few prototypes in California for $10,000 a month.) "It's not easy to make a good fuel cell. But it's easier than making a good battery, " Lovins stated in his Given Institute talk. "From then on, it's mass production."
Lovins has a way of dismissing a vast array of technical and market obstacles with remarks like, "From then on, it's mass production"and some energy analysts feel that he underestimates the difficulties involved. "Many of the things Amory has said have been insightful and perceptive," says the Kennedy School's Hogan. "But I would never invest my own money in any of his schemes."
Yet the fuel-cell car, if viable, does promise some impressive advantages. The great efficiency that such a car delivers does not occur between the wellhead and the fuel tank, but between the tank and the wheels. Because the power train of an internal-combustion car dissipates 85 percent of the fuel's energy before it reaches the wheels, more efficient technology can easily produce large gains in mileage. "The fuel cell propels the car two to three times as efficiently as a gasoline engine," Lovins declares. "It's a fallacy to compare hydrogen to other fuels in terms of cost per unit of energy. You want to look at cost per unit of servicehow many miles can you drive?" Lovins cites "widely accepted numbers" that peg the fuel costs of driving gasoline-fed autos at five cents per mile and reformed-hydrogen cars at 2.5 to 3.5 cents per mile.
Prototype fuel-cell cars run almost silently. They are quiet because a fundamentally different mechanism propels them. There is no internal combustion engine, and so firing pistons, revving engines, and the lurching acceleration from shifting gears go away. Instead, the fuel cell drives an electric motor that turns the wheelsit's a far simpler vehicle, lacking spark plugs, engine oil, and a transmission. Yet it moves with alacrity. The Toyota prototype can accelerate faster than a six-cylinder gasoline car of the same model, and drive at up to 96 miles per hour (the motor could go even faster, but its computer was programmed for that upper limit). Its only emission is waterperhaps 2.5 gallons per 100 miles, sprinkled harmlessly onto the pavement.
|Toyota's FCHV hydrogen fuel-cell car (above, left) is a prototype based on its Highlander SUV. Hypercar's carbon-fiber mock-up (above) dramatically reduces vehicle weight without sacrificing body strength, potentially helping to boost fuel efficiency by a factor of five. |
Courtesy of Hypercar
It also has a range of 186 milesand there's the rub. Drivers generally want to travel at least 300 to 400 miles on a tank of gasin this case, hydrogen gas. Current prototype cars store hydrogen in carbon-fiber tanks compressed to 5,000 pounds per square inch, but cannot store enough of it to support long-distance travel. Supercooled liquid hydrogen is far more dense, but the process of liquefying the gas, and keeping it cold, is itself costly and energy-intensive. Lovins notes, however, that newer tanks can safely operate at 10,000 pounds per square inch and have been tested at more than 20,000. Germany has legally approved such aerospace-style tanks, and GM has used them in prototype cars. Taking another approach, some researchers are seeking a new way to store the gas, perhaps in hydridescompounds that contain hydrogenthat might release the gas gradually and then be "recharged."
Another obstacle is the high cost of fuel cells, no problem for NASA but a severe hurdle to the commuter. It is hard to estimate the true market cost of an item that is still years away from mass production, but some estimates price a fuel-cell stack that could run an automobile at more than $100,000. The PEM fuel cell, favored for light-duty vehicles, typically has that platinum-dusted membrane; one research task is finding ways to build effective fuel cells without precious metals.
Lovins favors another approach. It is to reduce the weight of the car, which allows one to downsize its power plant, solving the storage, range, and cost problems simultaneously. Look what Jaguar did with a conventional car by changing the car's "body in white"its bare structural corefrom steel to aluminum, saving 450 pounds of weight. "That increased fuel economy," says David Dwight, director of business development for Hypercar (www.hypercar.com), a for-profit company in Basalt, Colorado, that RMI spun off in 1999. "The medium-size Jaguar X-6 model had a V-8 engine. They were able to use a V-6 instead, which costs less. All the performance numbers are the same, but it uses less fuel."
Formula I racing limits engine size to three liters, so the way to improve racecar performance is to lower the car's weight: speed and acceleration are a function of power divided by weight. In Formula I racingwhere price is no object, but safety is importantcars are made of advanced carbon-fiber materials, which are very strong and very light. On the wall of one room at Hypercar is a quotation from Trevor M. Creed, senior vice president for design at Daimler-Chrysler: "If money were no object, you'd make cars out of carbon fiberwe know how. But the cost is prohibitive."
Today, carbon fiber shows up mostly in low-volume specialty applicationsjet fighters, tennis racquets, racing sailboats. The key mission of Hypercar is to make carbon-fiber construction affordable for the consumer-auto market. The firm has patented a processing technology for carbon-composite structures that promises significantly reduced costs. The light, strong, carbon-fiber body could greatly improve gas mileage in conventional cars, and would help make a hydrogen car viable by downsizing its power plant by two-thirds. As a bonus, carbon-fiber car bodies are far stronger than steel ones. "Carbon-fiber composites are the greatest crash-absorbing material known," says Dwight.
The Hypercar office has a mock-up of a mid-sized, sleek, German-silver concept SUV designed around the firm's FiberforgeTM manufacturing process for carbon-fiber auto bodies. According to Hypercar's computer simulations, such an SUV with a hydrogen fuel cell installed could get mileage equivalent to 99 miles per gallon and drive 330 miles on just 7.5 pounds of hydrogen. This is the ultra-light, ultra-strong car that, Lovins says, could sell at a competitive price and create a domestic Saudi Arabia. "Think nega-missions in the Gulf," he adds. "Mission Unnecessary."
That is the vision of what smart designincluding policy designcould bring: clean, efficient, abundant, renewable power. Safe, secure electricity and heat, produced locally in the offices, homes, and cars of America. A United States that supplies its own energy needs, no longer gobbling up the fossil fuels of the world. In fact, a world of self-sufficient nations, powering themselves in that same local, small-scale, decentralized way: a billion points of light.
Whether this utopia can be realized will depend on choices made on many levels, from personal consumption to national policy. Lovins's team aims to explicate these choices this spring in Out of the Oil Box, a study showing how to get the United States off oil attractively and profitably, even for the oil companies. Controversy is certain, and no doubt critics, academic and otherwise, will have their reasonsperhaps sound oneswhy a hydrogen economy cannot work.
But this is nothing new for Lovins; from the beginning, he has heard his ideas called impractical and unreasonable. That doesn't seem to bother him. As a young man working for Friends of the Earth, he once suggested to David Brower that maybe it was unreasonable to expect their kind of lobbying, or the environmental movement, to overcome social and political delays soon enough. "But Amory," Brower retorted, "reasonable people have never done anything."
Craig A. Lambert '69, Ph.D. '78, is deputy editor of this magazine.
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