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in title, tags, annotations or urlIEA World Energy Outlook 2007 - 0 views
Research Recap » Blog Archive » Solar Power Could Supply 69% of US Electricity by 2050 - 0 views
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A massive switch from coal, oil, natural gas and nuclear power plants to solar power plants could supply 69% of the US's electricity and 35% of its total energy by 2050, according to Scientific American. However, $420 billion in subsidies from 2011 to 2050 would be required to fund the infrastructure and make it cost-competitive, the publication says in "A Solar Grand Plan" presented in its January 2008 issue.
Sun sets on BP's solar hopes - 0 views
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Solar power will not be able to compete with conventional energy until there is a breakthrough in the technology, BP's chief executive has said, in a further sign of the company's move away from renewables towards oil and gas. BP has invested hundreds of millions of dollars in making solar cells and components, but in the past six months it has been closing factories around the world, and announced a sharp cut in its investment in alternative energies, such as solar, from $1.4bn last year to $1bn (£658m) this year. Tony Hayward, chief executive, yesterday told a conference in California: "I think solar is probably the most challenged of all of BP's alternative energy interests." He added: "It is not going to make the transition to be competitive with more conventional power, the gap is too big."
les panneaux solaire - Le 20 heures - Les journaux télévisés de France 2 - FORUM France 2 - 0 views
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Je ne sais pas si tu te rends compte mais un lingot permet de faire 4 panneaux solaires de 1m² qui produisent 4x130w et qui ont une durée de vie de 20ans. si tu n'utilises que les chutes de lingots, il faut 6 lingots pour faire 1 panneaux qui produira 130w avec une durée de vie de 20ans (pour faire un panneaux en poly silicium donc avec les chutes des lingots, il faut encore faire fondre les chutes 1400°C pendant quelques heures). Imagine maintenant l'énergie qu'il faut pour faire 4 panneaux solaire (9x24heures à 1200°C), l'énergie qu'il faut est beaucoup plus importante que ce que 4 panneaux de 130w pendant 20ans peuvent produire (et là je parle que de l'énergie). En gros un panneau solaire de 130w ne rembourse pas l'énergie qu'il a eu besoin pour être fabriqué c'est bien le problème des média qui ne parlent que des bonnes choses de ces panneaux et qui arrive à faire croire à des personnes comme toi que c'est écologique.
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la plupart des panneaux solaires en silicium proviennent des déchets de l'industrie microélectronique
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fabrique les panneaux solaires, les lampes à DEL, les processeurs,.... je vais parler du monde du silicium. La base de ces panneaux solaire est donc le cristal silicium pur, pour obtenir ce silicium on met du sable (SiO2) dans un creusé et on le fait fondre à 1400°C. Une fois le silicium fondu et les molécules d'oxygène évacué, on plonge un germe de cristal de silicium dans le creusé que l'on tire tout doucement (1mm/15min) afin d'obtenir un cristal du silicium. Il faut environs 24 heures pour obtenir un lingot de silicium et pendant ce temps le creusé doit resté à 1400°C. S’en suit une purification du lingot, on recuit le lingot 5 à 6 fois à 1000°C pendant à chaque fois 24 heures cela fait beaucoup beaucoup d'énergie et donc beaucoup beaucoup de CO2. Une fois le lingot pur obtenu, il faut le découper et le polir (là on utilise beaucoup d'eau il ne faut pas que le silicium chauffe). S’en suit alors la réalisation du système, là il s’agit d'une répétition de dépôt de résine toxique, cuisson, attaque chimique (acide fluoridrique), dépôt chimique (silane SiH4 et Tétrafluorosilane SiF4 qui produit des gaz fluoré très toxique avec une duré de vie de 150ans) généralement l'opération est répété 40 fois environ. Après les systèmes obtenu il faut les découpés, mettre dans des boitiers,... Bien sur, je ne parle pas du transport car la plupart des systèmes sont fabriqué en Asie, il y a aussi des à côté comme les salles blanches,.... les ordinateur qui tourne 24 heures sur 24 7jours /7. Il faut 1 lingot pour fait 4 panneaux de 1 m²
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in fr ... but perhaps you know that photovoltaïc panels are polluting massively .. just to build them !!! and have not enough power to reimburse their fabrication back !!! and if there is no more oil to build them .. what's up ?
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une vérité sur les panneaux solaires ... à suivre de près à moins que les panneaux photovoltaïques soient condamnés et obsolètes dès ce jour ...
The Oil Drum | Facing the Hard Truths about Energy - the NPC report, commented - 0 views
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five main truths:
For alternative energy technologies, watch the uranium price - not just the oil one | AEI - 0 views
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outstripping supply for energy
The Oil Drum: Europe | Offshore Wind - 0 views
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t was a huge event, with close to 2,000 participants and a palpable energy and a sense of - finally - progress. The conference was attended by the ministers for energy or senior political representatives from several countries (the UK, Germany, several Nordic countries - see the link above) and happened at the same time as an important German government meeting that decided to increase offshore tariffs to 14c/kWh, a strongly supportive measure which is likely to be the starting point of a massive wave of investment in the sector in that country. Interestingly, despite that decision, and the excitement it generated, the UK market is still seen as likely to be bigger than the German one over the next 10-15 years, with all other markets being somewhat smaller.
EIA - Press Releases - EIA Assesses Impact of Economic Growth, Oil Prices, and Future Policies on Projected Energy Trends - 0 views
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Renewables are the fastest-growing source of world energy supply, but fossil fuels are still set to meet more than three-fourths of total energy needs in 2035 assuming current policies are unchanged
EIA: This Week In Petroleum - 0 views
The Anthropocene Myth | Jacobin - 0 views
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Who’s driving us toward disaster? A radical answer would be the reliance of capitalists on the extraction and use of fossil energy. Some, however, would rather identify other culprits. The earth has now, we are told, entered “the Anthropocene”: the epoch of humanity. Enormously popular — and accepted even by many Marxist scholars — the Anthropocene concept suggests that humankind is the new geological force transforming the planet beyond recognition, chiefly by burning prodigious amounts of coal, oil, and natural gas.
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The important thing to note here is the logical structure of the Anthropocene narrative: some universal trait of the species must be driving the geological epoch that is its own, or else it would be a matter of some subset of the species. But the story of human nature can come in many forms, both in the Anthropocene genre and in other parts of climate change discourse.
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Giving short shrift to all the talk of a universal human evildoer, she writes, “We are stuck because the actions that would give us the best chance of averting catastrophe — and would benefit the vast majority — are extremely threatening to an elite minority that has a stranglehold over our economy, our political process, and most of our major media outlets.”
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Climate Change Messaging: Avoid the Truth » CounterPunch: Tells the Facts, Names the Names - 1 views
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Ted Nordhaus and Michael Shellenberger published the op-ed “Global Warming Scare Tactics” in the New York Times on April 8. Participants in recent debates over climate change may recognize their names. They’re the guys who run the Breakthrough Institute, a pseudo-contrarian “environmental research organization.”
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While occasionally on point in its charges against the big organizations, the essay (based on interviews with mostly white male leaders of large national groups) had nothing to say about the environmental justice movement, or other grassroots groups led by women and people of color. It neglected as well the environmental movements of the Global South, today the heart of the climate justice movement.
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Is fear of disruption of what Habermas calls the life-world the sole inducer of civic action? Of course not: social movements also cohere around other shared, negotiated understandings, identities, diagnoses of problems, and assessments of opportunities. Might fear paralyze rather than mobilize? Yes: in cases when the perceived threat appears impervious to resistance, and when commitment to the cause flags over time. Fear-based campaigns require a tangible evil: a draft card, a nuclear plant cooling tower, a polluting facility’s smoke plume, an Operation Rescue picket line.
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Mining Hydrothermal Vents For Renewable Electricity, Drinking Water - 0 views
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The Marshall Hydrothermal Recovery System would use the heat from hydrothermal vents 7,000 feet under the sea to make electricity. Its temperature is incredibly high, hot enough to melt lead, but it does not boil because of the intense pressures at the depths where the vents are located. Superheated fluid would be propelled up through a through a (well insulated!) pipe to an oil platform located on the surface above the vent. The superheated fluid is carried by means of flow velocity, convection, conduction, and flash steam pressure as it rises and the ambient pressure is decreased.
wastewatts : Sustainable Technology Discussion Group - 2 views
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"Energy security is rapidly becoming a major concern for citizens of both developed and developing countries. We have grown totally dependent on low cost oil and gas for our everyday lives. As increased pressure is put on the remaining reserves, prices are rising inexorably, and alternatives must be sought. This requires a change of lifestyle for the 21st Century. Wastewatts is a technology discussion forum that looks at ways in which we might change our fossil fuel dependent lifestyles, off-setting petroleum with renewable fuels or those derived from industrial or agricultural waste."
the outlook for energy: a view to 2030 - 0 views
Energy Outlook - 0 views
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A year ago, I looked back on 2007 and ahead to 2008, a year that has defied the predictions of most observers. Although I can't claim to have foreseen the possibility that oil would break $140 and $40--from opposite directions--in the same year, I worried about energy market volatility and cautioned that risk cuts both ways. That seems equally appropriate advice today, when markets are focused on the downside, and "confirmation bias" is such a powerful force. But while we shouldn't expect a repeat of the wild ride of the year now ending, the experience has provided some expensive lessons about energy markets. The following is a non-exhaustive list of those that struck me:
The Oil Drum | Peak Phosphorous - 0 views
The Oil Drum: Europe | Gore sets goal of 100% carbon-free electricity by 2020 - 0 views
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Al Gore has made a major speech in Washington this morning, setting out an ambitious goal for the USA to produce all of its electricity from carbon-free sources by 2020. I thought I'd comment on the technical feasibility of the plan, and the underlying economics of such an endeavour.
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The short answer is: while 100% is probably unrealistic, it's not unreasonable to expect to be able to get pretty close to that number (say, in the 50-90% range) in that timeframe, and it is very likely that it makes a LOT of sense economically.
Risk Analysis For Low Carbon Systems - Engineer Live, For Engineers, By Engineers - 0 views
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The TERA (Technoeconomic Environmental Risk Analysis) methodology, used for the European aviation industry under the leadership of Cranfield University, will provide a valuable insight to investigate the most promising systems in terms of multidisciplinary criteria and to estimate their competitiveness, so as to facilitate their route to commercial operation with benefits for the UK energy industry and for the long term needs of the community. TERA methods are being developed for power generation and the oil and gas industry in association with two major players in the energy field.
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