• 2015년 3월
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    Off-highway goes hybrid

    Image: 11849_15827_ACT.tif

    Dana is among those who feel hydraulic hybrids bring significant benefits.

    Passenger vehicle buyers may not have widely embraced the hybrid vehicle concept, but many suppliers feel off-highway owners will find much to like with hybrids. Vendors are unveiling hybrids that use either hydraulic or electric power to reduce fuel consumption and emissions while also improving performance.

    Earlier this year, Ricardo announced that it is setting up a dedicated team of electric machine, power electronics, and control systems specialists whose goal is to help design teams develop state-of-the-art electric powertrain systems. And Eaton said it has shipped more than 6500 hybrid vehicle systems.

    Deere also pushed electric power forward, coming out with its first hybrid construction vehicle, the 644K wheel loader (Click here for recent coverage). Its PowerTech 6.8-L Tier 4 Interim/Stage IIIB engine is augmented with electric drive technology. Deere predicts that fuel savings may be as much as 25%.

    It’s not simple to figure out how long it will take to recoup the additional cost of hybrid technology, which can easily run tens of thousands of dollars for fairly large vehicles. Depending on the application, the payback can be just a few years, which is significant given the long lifetimes of many off-highway vehicles.

    Caterpillar predicts that the hydraulic hybrid technology of its 336E H excavator trims fuel consumption by 25% over the non-hybrid version (Click here for recent coverage). That means users could see a return on the premium cost of a hybrid after just one year of field operations. Though Cat has produced electric hybrids, it’s bullish on hydraulic technology.

    “No other commercially available technology has higher power density than hydraulics,” said Ken Gray, Global Product Manager, Cat.

    Dana is also preparing to unveil its Spicer PowerBoost hybrid technology, which is designed to integrate with existing powertrains with a minimum of effort. It should bring 20-40% savings in fuel consumption.

    “We see our primary applications in construction, industrial lift trucks, front end loaders, telehandlers. They have short Y-cycle times,” said George Constand, Dana’s Chief Technical Officer. “It should be about a year and a half to two and a half years to commercialization.”

    While hydraulic hybrids come on line, electric hybrids are also advancing. Eaton is among those who are making considerable progress in cost cutting.

    “We’ve taken battery replacement costs down by about 70% over a year ago,” said Gerard DeVito, Engineering Director for Eaton’s Hybrid Power Systems Division. “In the past, when something failed, you had to replace the full pack. Now if a fan or other component fails, you can replace it without bothering anything else.”

    He noted that battery prices and lifetimes are improving dramatically, partially because off-highway systems leverage the technical advances and volumes of passenger cars. For example, Eaton uses the same cells as those used in the Chevy Volt.

    “We’ve got a different configuration and the size is a lot different, but we both use the same cell. We’re seeing rapid advances in battery cells, especially for being able to put power in and out quickly,” DeVito said. “In the past, charging and discharging quickly took lifetimes down substantially.”

    While fuel consumption is important, some proponents contend that fuel savings are matched by improvements in performance. Deere said that the constant speed reduces noise compared to conventional systems where engine speeds change often. That can improve operator efficiency since people typically find changes more annoying than constant noise levels.

    Deere also explained that the electric motors deliver torque so the engine can run at a constant speed, improving hydraulic responsiveness while reducing cycle times. Other suppliers likewise contend that this sort of improvement may outweigh fuel savings.

    “The move to hybrids could be driven more by performance than fuel economy,” said Mike Traver, Diesel Systems Business Unit Director for IAV. “Getting torque quickly from zero speed may be more important than saving fuel.”

    In smaller machines, adding hybrid power can keep a vehicle below levels that require compliance with today’s stringent emissions regulations. Legislators didn’t tighten rules for engines below 75 hp (56 kW).

    “Equipment makers can downsize engines by relying on the hybrid technology,” Constand said. “Depending on the application, that can be in the 10-15% range, which could be very important when Euro 4 and 5 emissions regulations go into place.”

    http://www.sae.org/mags/sohe/11900?PC=130318NWOH

    Oil’s average price posts new records and they’re telling us it’s abundant!

    It is a slick piece of public relations to convince people to disregard what is right in front of them and believe the opposite. And yet, that is what the oil industry has achieved with an oh-so obviously coordinated campaign to tell the public and policymakers that there is no need to be concerned about future oil supplies.

    Many people remember the price spike of 2008 which shot prices to an all-time high of $147 a barrel. Oil subsequently crashed all the way down to about $35 at the end of that year as a brutal contraction gripped the global economy. But, oil has subsequently been making new all-time highs when you consider the yearly averages.

    U.S. drivers should not be that surprised by this for they paid average daily gasoline prices that were higher in 2011 and 2012—$3.53 and $3.64 per gallon respectively—than they did in the previous record year of 2008 when they paid an average of $3.26, according to the U.S. Energy Information Administration (EIA).

    Brent Crude, which has become the de facto world benchmark price for crude oil, has also just posted back-to-back years of record prices, higher than even the average daily price in the fateful year of 2008. In that year Brent achieved an average daily price of only $96.94 according to the EIA. But, in 2011 the average daily price was a record $111.26—which was followed by another record in 2012 of $111.63. The price in 2013 has so far averaged about $114.

    It is true that the American benchmark crude—Cushing, Oklahoma West Texas Intermediate—has been trading at a discount to Brent Crude. This is because Cushing, one of the country’s largest oil depots, is being flooded with supplies from North Dakota and the Canadian tar sands, supplies currently unable to find their way to a seaport that would connect them with world markets and thus world prices. An operator I know in Houston said that rather than send his production to Cushing where the discount is between $20 and $25, he is happy to put his oil on a barge and send it to Louisiana where he has consistently been getting prices over $100.

    As it turns out, most inhabitants of the globe pay prices reflective of the Brent Crude price, and that’s why it is frequently quoted as the world price.

    So, how is that the public and many policymakers have swallowed the abundance argument even though the evidence of prices suggests the opposite? The industry has made its case by saying that newly accessible tight oil deposits in North Dakota and elsewhere are going to vastly expand oil production. It has coaxed Wall Street firms with whom the industry does business to put out rosy forecasts; it has made an army of paid think-tank propagandists available to the media; it has convinced government agencies that the future is bright; and, in one case, it sent one of its own to Harvard to write an industry-funded report that says everything will be fine—in the future!

    You will notice one theme here. The industry’s case for abundance rests not on a current glut or a downward sloping oil price chart, but rather on the promise of abundance at some indeterminate time in the future, that is to say, on magical forecasts. But colorful charts and cheery prognostications are not facts. And, as always, it is important to consider the source.

    Keep in mind that what a good magician does is not really magic. Rather, a good magic show is based primarily on misdirection. Get the audience to look in the wrong place while you do your handiwork unobserved.

    And, so it is with the oil industry. It has been able to get the public and policymakers to focus on marginal gains in U.S. oil production while ignoring declines in the rest of the world. Mathematically speaking, that is how it must be since the rate of worldwide oil production has been essentially on a bumpy plateau since 2005. As U.S. production has grown, production in the rest of the world as a whole has declined by about the same amount.

    Now, that wouldn’t matter quite so much if oil were not traded in a world market dominated by large countries that are still huge importers of crude oil. But, the other fact that the industry PR magicians don’t want you to focus on is that global net exports of oil—that is, the oil available on the world market to importers such as the United States, China, Japan, India and much of Europe—has been shrinking since 2006. The global competition among importers for those shrinking exports has been a major factor in sustaining record prices for the past two years.

    It is worth keeping in mind that all of this is happening as the so-called fracking “revolution” is proceeding, as record investment in oil exploration and development continues, and as consistently high prices drive the necessary profits for all this effort. And yet, the impact on supplies worldwide has been almost imperceptible.

    In fact, as John Westwood, chairman of the energy consulting firm Douglas-Westwood, explained in a slide presentation, it is becoming exceedingly difficult to add new oil production capacity. Some $2.4 trillion in oil industry capital expenditures from 1994 to 2004 increased the worldwide rate of oil production by 12 million barrels per day. However, $2.4 trillion in capital expenditures spent from 2005 to 2010 resulted in a decreasein the rate of oil production of 200,000 barrels per day. (See slide 8 of Westwood’s presentation.)

    I am reminded of the late comedian Richard Pryor who, when caught by his wife in bed with another woman, explained that things weren’t what they seemed. When she resisted his explanation, he asked her, “Who you gonna believe? Me or your lyin’ eyes?”

    Once you’ve seen the troubling facts about flat global oil production, shrinking global oil exports, and record high prices, about all the industry can do is insult your intelligence by asking the same question.

    http://www.resilience.org/stories/2013-03-10/oil-s-average-price-posts-new-records-and-they-re-telling-us-it-s-abundant

    Exxon at Least 25 Years Away From Making Fuel From Algae

    Exxon Mobil Corp. (XOM)’s $600 million foray into creating motor fuels from algae may not succeed for at least another 25 years because of technical hurdles, said Chairman and Chief Executive Officer Rex Tillerson.

    So far, scientists haven’t been able to develop a strain of algae that reproduces quickly enough and behaves in a manner that would produce enough raw material to supply a refinery, Tillerson said in an interview taped for “Charlie Rose” on the PBS television network.

    “We’ve come to understand some limits of that technology, or limits as we understand it today, which doesn’t mean it’s limited forever,” Tillerson said, according to a transcript of the interview. The venture is “probably further” than 25 years away from successfully developing fuels.

    Exxon, the world’s biggest maker of gasoline and diesel, has been studying the potential for algae-based fuels for 3 1/2 years in a joint venture with J. Craig Venter’s Synthetic Genomics Inc. When the project was announced in July 2009, Exxon predicted it could produce fuels in five to 10 years.

    When the venture was announced, the companies said they would build a greenhouse near San Diego to test various algae strains. The goal was “to produce a new source of oil,” Emil Jacobs, Exxon’s vice president of research, said during a July 14, 2009, conference call.

    Venter, best known for his role in the sequencing of the human genome in the 1990s and early 2000s, said during the same call that algae ponds would produce 10 times as much fuel as the ethanol fed by corn fields covering the same amount of space.

    “What we’ve come to understand is the hurdle is pretty high and the hurdle seems to exist at the basic science level, which means it’s even more difficult to solve,” Tillerson said. “These are very challenging problems.

    http://peakoil.com/alternative-energy/exxon-at-least-25-years-away-from-making-fuel-from-algae

    정부 자동차보급 정책… 주춧돌인가 걸림돌인가

    요즘 새로운 에너지에 대한 소식이 많이 들린다. 이는 에너지 수급의 심각성에 대해서 대중의 공감대가 형성되고 있다는 뜻이다. 실제로 오일의 생산은 2005년을 기점으로 정체 상태에 들어갔으며 이는 일반적으로 경제 성장의 정체를 의미한다. 즉, 2008년 리먼브라더스사의 파산 등 연이은 세계적인 경제 위기는 오일 생산의 정체와 무관하지 않다.

    문제의 인식이 문제 해결의 첫걸음이긴 하지만 사실과 어긋나는 선동적인 뉴스에 휘둘리는 것은 아까운 시간만 허비하고 나아가 문제의 해결을 더욱 어렵게 만들기도 한다.

    한 예로 최근 엄청난 양의 쉐일가스가 개발되고 마치 초저가의 천연가스가 거의 무한대로 공급될 것이라는 기대감이 있는데, 쉐일가스는 전혀 새로운 것이 아니다.

    미국의 경우를 들면 현재 단기적인 쉐일가스의 무분별한 과잉 생산으로 가스 가격이 하락한 것은 사실이나, 정작 쉐일가스 생산 업체들은 예외 없이 적자 운영을 하고 있으며 가스 가격이 현재의 4배로 상승하는 경우에도 대부분 적자를 면치 못할 것이라는 진단이 있다.

    에너지 문제의 해결에 국가의 총력을 기울이는 것은 바람직하나 그것이 정부 주도로 특히 정치적인 이유로 인해서 왜곡되는 것은 장기적으로 매우 심각한 문제를 야기할 수 있다.

    한 예로 중국의 전기자동차 산업을 들 수 있다. 중국 정부의 섣부른 전기자동차 장려 정책과 맞물려 투자의 현인으로 불리는 워런 버펫의 대규모 투자로 더 유명해진 BYD는 주식 가격이 급등하여 창업자는 2009년 중국 최고의 부자로 부상하기도 하였으나 경제 위기에 따른 정부 보조금의 축소와 함께 전기자동차의 거품이 꺼지고 오히려 그동안 전통적인 자동차 기술 개발의 기회를 놓친 것이 독으로 작용하여 현재 몰락의 길로 접어들고 있다.

    우리나라의 경우도 한때 정부 주도의 녹색성장 정책에 동승하여 태양광 산업에 올인하였던 한 대기업 그룹의 해체를 작금에 목도하고 있다. 물론 좋은 기술도 규모의 경제를 달성하지 못하면 시장에서 사장될 수 있다. 따라서 정부의 보조금 지원 등으로 시장의 규모를 키워 놓아야 할 경우가 있으나, 그 자체로 문제가 있는 기술을 정부 주도로 마냥 키우는 것은 병을 키워 놓는 경우와 마찬가지이다.

    서울시는 과거 대중교통 수단의 서비스라는 공공성을 감안하여 매연이나 소음의 상한선 등 합리적인 경쟁 규칙을 정하는 대신에 디젤엔진 기술에만 매우 불리한 이상한 규칙을 정하여 일방적으로 CNG 버스라는 특정 기술의 손을 들어 주었다. 결과적으로 안전 문제 그리고 고가의 차량 제작 비용 등은 시민의 부담으로 남게 되었다. 과거 서울시의 이러한 결정은 정부의 단순한 감시자로서의 역할에서 크게 지나친 것이며 제정한 경쟁의 규칙 또한 별로 공정해 보이지 않는다. 천연가스 생산국이나 시민의 안전이 최우선 순위가 아닌 일부 미개발 국가들을 제외하면 CNG 버스를 대중교통화하는 것은 사실상 우리나라가 유일하다. 현재 기술의 판도가 많이 바뀌었음에도 불구하고 정책 입안자들은 계속 해묵은 잣대를 들이댈 모양이다.

    지금 한창 개발이 진행되고 있는 세종시 대중교통 수단으로 또 다시 CNG 버스를 도입하려고 한다는 소문이 들린다.

    구미 선진국의 교통 정책 입안자들은 예외 없이 단지 합리적인 경쟁의 규칙만을 정하고 가장 적합한 기술의 최종 선택을 시장의 판단에 맡기었다. 그 결과 도심 지상 대중교통의 가장 현실적인 해법으로 선진국들의 시장은 디젤 혹은 디젤 하이브리드 버스의 손을 들어주었다.

    보통 좋은 약은 적당히 사용하면 몸을 이롭게 한다. 그러나 약 자체가 나쁘거나 설사 좋은 약이라 할지라도 그 양이 지나치면 우리 몸에 대부분 독으로 작용한다. 영양분도 마찬가지이다. 정부의 정책 역시 적당하면 좋은 약이 되나 너무 과하거나 공정하지 못하면 오리려 독으로 작용한다. 그리고 그 효과는 어느 쪽이든지 아주 오랫동안 지속되는 것이 일반적이다. 세종시의 버스 정책. 미래형 인간 중심 도시 건설의 주춧돌이 될 것인가 아니면 걸림돌이 될 것인가?

    최세범

    http://www.daejonilbo.com/news/form/print.asp?pk_no=1051185

    The big shift

    Governments should be ‘educating their citizenry of the risk of contraction to minimize potential future social discord,’ says Swedish expert Mikal Hook. Photo: Shutterstock. Reproduced at Resilience.org with permission.

    An energy transition has begun, but it’s probably not the one you imagined.

    It might have an ugly financial face, an authoritarian political mask or come in the guise of geographic disunion.

    But it probably won’t look like a solar panel or a windmill. And it won’t include flying cars or undersea homes.

    Although no one really knows where the globe’s energy mix is headed or how it will shape our lives in the future, energy experts now offer a diversity of forecasts, stories and warnings.

    Their pronouncements are both myth busting if not startling.

    • When economies shrink

    Jeff Rubin, the former chief economist for CIBC, argues that “the new green” will not be endless arrays of solar panels or windmills but less oil and smaller economies.

    Mikal Hook, an analyst at Sweden’s Uppsala Depletion Group, goes further and argues that any orderly energy transition might now be impossible because renewables simply can’t grow as fast as oil.

    He also warns that all citizens should prepare for “high and likely volatile oil prices,” and that governments should be “educating their citizenry of the risk of contraction to minimize potential future social discord.”

    Chris Turner, Calgary’s sustainability journalist, believes that an orderly energy leap can be made but political leaders and the status quo aren’t showing much interest in public transit or renewable forms of energy at least in North America.

    Joseph Tainter, the U.S. anthropologist and historian, suggests that civilization has climbed a tall spiral staircase of energy complexity without knowing how far we can go with the resources we have at hand.

    He warns that it takes energy to solve complex problems and he doesn’t think society can voluntarily cut back on fossil fuels.

    Vaclav Smil, a University of Manitoba researcher and one of the world’s great energy analysts, believes that energy obesity is the moral problem and proscribes a diet consisting of low-hanging fruit such as efficient furnaces and high speed trains.

    Douglas Reynolds, an economist and engineer at University of Alaska Fairbanks, calls the collapse of the Soviet Union a dark energy transition and one completely unforetold.

    When oil production collapsed from 12 million to five million barrels a day after 1989, the Berlin Wall fell, the rich got richer, the Eastern Union dissolved and the Warsaw Pact crumbled.

    And that’s just a sampling of the voices and ideas you’ll read in this series on energy transitions. In the next couple of weeks we’ll take a hard look at the myths, the facts and some enduring truths about dirty oils, uncertain renewables and contracting economies.

    • Where we are now

    But before we can talk about change, evolution, innovation or just plain dissolution, we need to appreciate where we are in the energy world.

    The basic global energy picture is what Nobel laureate Richard Smalley once called the “terawatt challenge.” And it comes with no comfortable answers.

    What’s a terawatt? It is the average rate at which energy is released in the burning of five billion barrels of oil during a year.

    The world uses on a continuing basis about 17 terawatts of energy in the form of coal, gas, oil and nuclear power. Eighty-five per cent of that work comes from fossil fuels. In fact, oil provides 37 per cent of the energy mix and accounts for 90 per cent of all transportation fuels. It’s the lynchpin of the global energy system.

    Renewable or green forms of energy such as hydro and wood contribute slightly more than one terawatt. Wind, solar and biofuels barely appear on the chart. (One terawatt, by the way, is the amount of energy the world consumed in 1890.)

    Energy-Graph.jpg

    Terrawatt challenge: Chart shows where our energy comes from now. Where can we go from here?

    Now the relationship between economic growth and energy consumption is pretty direct, if not fundamental. Countries that spend lots of energy, and particularly oil, tend to be wealthier than those that don’t.

    “Just as higher metabolic rates are required to sustain and grow larger, more complex bodies, so higher rates of energy consumption are required to sustain and grow larger, more developed economies that provide greater levels of technological development and higher standards of living,” explains a group of scientists in the journal BioScience in 2011. Even GDP is strongly linked to oil spending.

    In an article entitled “Energetic Limits to Economic Growth” the scientists add that a global energy diet would likely constrict the economic system. “Gradually reducing an individual’s food supply leads initially to physiological adjustments, but then to death from starvation, well before all food supplies have been exhausted,” say the scientists.

    • Changing the diet

    Now everyone who buys gasoline knows that the era of cheap oil is over and that is already feeling the pinch. Business as usual is not working.

    Difficult hydrocarbons such as bitumen and deep sea oil are now replacing easy oil, and that shift alone represents a dramatic and little heralded energy transition.

    The carbon, capital and environmental footprint of these difficult or low quality crudes are bigger and more complex than light oil.

    At the same time most citizens also recognize that investments in renewable forms of energy remain small, costly and dispersed. Moreover they produce electricity, not liquid fuel.

    So that’s the first challenge. How does a society maintain an expensive 17 terawatt diet when the cost of its primary energy supply hits triple digits and the so-called replacements are neither as versatile or portable as oil?

    But here’s another twist. If the rest of the world were to adopt the lifestyles of the average North American who now consumes 24 barrels of oil (and lots more electricity) civilization would require a fivefold increase in energy consumption. That’s 77 terawatts.

    To entertain a global population of 9.5 billion in 2050 on North Americans standards multiplies the challenge again.

    Such a policy would take another 268 terawatts or 16 times the current level of energy spending. (Just to energize nine billion people living at current Chinese standards would take at least 34 terawatts or a near tripling of current rates.)

    The-Rural-Postman.jpg

    Utopian dreams: French postcard from the late 19th century portraying how our master of energy would allow us to be living now. Source: Messy Nessy.

    These ungainly figures invite several more conundrums. The amount of energy that can be harvested from the planet on an annual basis is about 77 terawatts. So any business as usual case based on exporting North American energy lifestyles to China and India totally busts the world’s energy bank.

    A third problem arises from the atmospheric pollution created by the burning of fossil fuels over more than 150 years. To avoid catastrophic global warming and runaway ocean acidification, scientists calculate that society requires a massive energy conversion to renewables beginning yesterday.

    Such a program means converting the current energy budget of 17 terawatts from mostly fossil fuels to 14 terawatts from renewables within 25 years. Such a revolution would reduce the fossil fuel share of the energy mix to about three terawatts a day.

    • Wind farm continents?

    But is such a feat even possible given renewables low profile energy in a debt-ridden world?

    The U.S. inventor and engineer Saul Griffith calculates that that world would have to industrialize a landmass the size of Australia with wind farms, solar arrays and algae biofuel factories to achieve such a climate stabilization goal.

    He calls this unmade alternative geography “Renewistan,” and compares the scale of the endeavor to getting all the combatants in the Second World War fighting on the same side for 25 years in a row. Few environmentalists appreciate the magnitude or the cost of this challenge.

    In the end, there are several different ways of answering the terawatt challenge. The politically correct and dominant approach is denial. But one way or another the globe must increase either renewable energy supplies, decrease fossil fuel use or lower population levels. Or achieve all three simultaneously.

    But whatever nations choose or deny, ordinary citizens face years of political and economic volatility in the years ahead.

    And the first thing we need to acknowledge and understand about energy transitions is that they do not arrive fully formed or in polite clothing.

    The long switch from wood to coal was driven by the systematic deforestation of Europe while the difficult shift from human slavery to inanimate slaves energized by steam took one of the world’s most dramatic protest movements: abolition.

    • Realism and hope

    History shows that energy transitions are invariably a utopian’s worst nightmare or a novelist’s best idea: they are protracted, difficult and unpredictable.

    And one more thing: energy transitions are often ripe with conflict.

    All the more reason to begin today thinking and talking about that transition, and so this is the first of many articles to come in a series we are calling “The Big Shift” — a clear-eyed exploration of what limits we face in our fossil fuel energy supplies, the potential of green energy, the resilience of our societies, the fragility of our political systems.

    • This series seeks to provide merely the most realistic information and well grounded analyses available. There’s no usefulness in sugar coating that produces false optimism that in turn might lull us into complacency at a moment when critical technological and political shifts must be anticipated and navigated. At the same time, hope begins with recognizing the challenges we face and the opportunities they present. Once gauged with clarity, we can get on with the task at hand, minimizing the risk and hardship that any big shift necessarily entails.

    http://www.resilience.org/stories/2013-02-20/the-big-shift