par Environnement2100 » 31 mars 2007, 08:16
Tout le monde connaît le "concept Sceptique" de la voiture du futur : ultra-léger, carbone à tous les étages, mini-moteur et consommation ridicule.
Cette conception radicale semble être quasiment partagée par d'autres auteurs sur la planète, y compris des... étatsuniens. Bien qu'on ait des doutes sur la signification en kg de "ultra-léger" chez eux, à peu près tout le reste est comparable.
L'article ci-dessous, assez long, est très intéressent ; peu de chiffres, mais un concept bien présenté, avec visiblement une étude sérieuse en amont.
L'ensemble du discours est très commercial, mais comment faire autrement aux USA ; Lovins se paye le luxe de dire du bien d'un autre artisan que nous connaissons bien, Tesla.
Trois sujets qui ne sont pas abordés à propos du carbone :
- on fait de la tôle avec du charbon, le carbone (paradoxalement) avec du pétrole
- le carbone est forcément plus sonore et inconfortable que la tôle
- si on abandonne la tôle, on met la moitié de nos aciéries au chômage.
Un petit lien vers la
Loremo, the dream come true, qui répond quasiment au cahier des charges de Sceptique.
Lecture recommandée, j'extrais juste quelques petits points.
The United States could dramatically cut oil usage over the next 20-30 years at low to no net cost, said Amory B. Lovins, cofounder and CEO of the Colorado-based Rocky Mountain Institute, speaking at Stanford University Wednesday night for a week-long evening series of lectures sponsored by Mineral Acquisition Partners, Inc.
Referencing Winning the Oil Endgame: Innovation for Profits, Jobs, and Security, a joint study by RMI and the Pentagon published in 2004. Lovins said that investing $180 billion over the next decade to eliminate oil dependence and revitalize strategic industries can save $130 billion gross, or $70 billion net, every year by 2025 (assuming oil is $26 per barrel, higher oil prices mean higher savings). At the same time, the efforts would make American industry more competitive, improve national security, cut carbon dioxide emissions by 26 percent, and save a million transportation jobs now at risk, while creating one million net new jobs. Under the blueprint, by 2015 the U.S. could eliminate its imports from the Persian Gulf; by 2040, oil imports could vanish all together; and by 2050, the U.S. economy could be oil-free.
Lovins said that the historic efforts to improve gas mileage by focusing on the engine was the wrong place to start. Observing that three-fourths of fuel use is weight-related and that only 0.3 percent of fuel burned goes toward accelerating the driver, Lovins argued that large gains will come from reducing energy loss at the wheels where each unit saved translates to 7-8 units of gas. This is best done by managing the weight of the car. "Ultralighting" vehicles using carbon composites or ultralight steels is essentially "free" with cost increases for materials offset by gains in efficiency.
Answering critics that say lighter cars are less safe, Lovins cited studies of nationwide crash data that show vehicle size confers safety -- weight does not.
He highlighted plugin hybrids. Acknowledging that cars are parks 96 percent of the time, Lovins pointed out the benefits of charging vehicles with cheap off-peak (night-time) electricity and selling valuable power storage at peak hours back to the grid, a transfer that could pay for the additional cost of batteries..
http://news.mongabay.com/2007/0329-lovins.html
Tout le monde connaît le "concept Sceptique" de la voiture du futur : ultra-léger, carbone à tous les étages, mini-moteur et consommation ridicule.
Cette conception radicale semble être quasiment partagée par d'autres auteurs sur la planète, y compris des... étatsuniens. Bien qu'on ait des doutes sur la signification en kg de "ultra-léger" chez eux, à peu près tout le reste est comparable.
L'article ci-dessous, assez long, est très intéressent ; peu de chiffres, mais un concept bien présenté, avec visiblement une étude sérieuse en amont.
L'ensemble du discours est très commercial, mais comment faire autrement aux USA ; Lovins se paye le luxe de dire du bien d'un autre artisan que nous connaissons bien, Tesla.
Trois sujets qui ne sont pas abordés à propos du carbone :
- on fait de la tôle avec du charbon, le carbone (paradoxalement) avec du pétrole
- le carbone est forcément plus sonore et inconfortable que la tôle
- si on abandonne la tôle, on met la moitié de nos aciéries au chômage.
Un petit lien vers la [url=http://www.loremo.com/daten_en.php]Loremo, the dream come true[/url], qui répond quasiment au cahier des charges de Sceptique.
Lecture recommandée, j'extrais juste quelques petits points.
[quote]The United States could dramatically cut oil usage over the next 20-30 years at low to no net cost, said Amory B. Lovins, cofounder and CEO of the Colorado-based Rocky Mountain Institute, speaking at Stanford University Wednesday night for a week-long evening series of lectures sponsored by Mineral Acquisition Partners, Inc.
Referencing Winning the Oil Endgame: Innovation for Profits, Jobs, and Security, a joint study by RMI and the Pentagon published in 2004. Lovins said that investing $180 billion over the next decade to eliminate oil dependence and revitalize strategic industries can save $130 billion gross, or $70 billion net, every year by 2025 (assuming oil is $26 per barrel, higher oil prices mean higher savings). At the same time, the efforts would make American industry more competitive, improve national security, cut carbon dioxide emissions by 26 percent, and save a million transportation jobs now at risk, while creating one million net new jobs. Under the blueprint, by 2015 the U.S. could eliminate its imports from the Persian Gulf; [color=red]by 2040, oil imports could vanish all together; and by 2050, the U.S. economy could be oil-free[/color].
Lovins said that the historic efforts to improve gas mileage by focusing on the engine was the wrong place to start. Observing that three-fourths of fuel use is weight-related and that[color=red] only 0.3 percent of fuel burned goes toward accelerating the driver[/color], Lovins argued that large gains will come from reducing energy loss at the wheels where each unit saved translates to 7-8 units of gas. This is best done by managing the weight of the car. "Ultralighting" vehicles using carbon composites or ultralight steels is essentially "free" with cost increases for materials offset by gains in efficiency.
Answering critics that say lighter cars are less safe, Lovins cited studies of nationwide crash data that show vehicle size confers safety -- weight does not.
He highlighted plugin hybrids. Acknowledging that cars are parks 96 percent of the time, Lovins pointed out the benefits of charging vehicles with cheap off-peak (night-time) electricity and [color=red]selling valuable power storage at peak hours back to the grid, a transfer that could pay for the additional cost of batteries.[/color].
[/quote][url]http://news.mongabay.com/2007/0329-lovins.html[/url]
[img]http://www.loremo.com/img/l22_fs_orange.jpg[/img]