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Loquo Barcelona: coches -
25 minutes ago
OPEL SIGNUM 1.9 CDTI 150CV AÑO 2005, 63.900KMS FULL EQUIP,VOLANTE
MULTIFUNCIÓN,ORDENADOR DE ABORDO, CLIMATIZADOR AUTOMÁTICO. EN BUEN ESTADO,A TODA
PRUEBA. ...
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Autoblog -
4 hours and 4 minutes ago
Filed under: Motorsports,
Technology, Audi

2010 Audi R15 plus - click above to enlarge
Testing for the 24 Hours of Le Mans doesn't begin until mid-June, but that doesn't mean that
Audi isn't already hard at work bettering the
chances of their diesel-powered R15 TDI racer.
Thanks to a belated rule change for the LMP1 class designed to hamper the dominance of
diesel-powered vehicles, Le Mans rulemakers have mandated smaller-diameter air restrictors and
curbed supercharger pressure in an effort to level the playing field. According to Audi, those
alterations have made the German automaker prioritize aerodynamics and downforce even more than
normal.
The result? Audi boffins have completely re-engineered the front-end of the car, so much so that
the new split nose racer has been designated "R15 plus." The updated LMP1 entrant has already begun
testing its new aerodynamics, revised cooling and fuel tank systems in the United States, and
further testing in Europe will follow before the legendary French enduro. Audi says that the
5.5-liter engine continues to crank out upwards of 590 horsepower. Can't remember what last year's
R15 look like? Compare and contrast by clicking here.
Official press release after the jump.
[Source: Audi]
Continue reading Audi R15 "plus" TDI shows off new, more aerodynamic nose
Audi
R15 "plus" TDI shows off new, more aerodynamic nose originally appeared on Autoblog on Mon, 15 Mar 2010 10:59:00 EST. Please see our terms for use of feeds.
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Autoblog -
7 hours and 2 minutes ago
Filed under: Motorsports,
Technology, Mazda, Racing
Dyson
Racing B09/96 running at Mid-Ohio - click above for high-res image gallery
The American Le Mans Series (ALMS) and its technical operations affiliate, International
Motorsports Association (IMSA), has formally approved a butanol blend as the fifth energy source
for race cars in the series. ALMS entrants are already running on E10 (10 percent ethanol),
cellulosic E85, diesel and hybrid-electric power. The first team expected to use butanol on a
full-time basis will be Dyson Racing with its Mazda-powered Lola prototypes. Dyson first used butanol
on an experimental basis in one of its cars during the
Petit Le Mans and Laguna Seca races at the end of the 2009 season.
For now, the approved fuel is a blend of 20 percent biobutanol and 80 percent ethanol (iBE20) and
only prototypes will be allowed to use it. For the first two races at Sebring and Long Beach, cars
running iBE20 will have to carry an extra 30 kilograms of ballast until the performance impact is
assessed. From the Laguna Seca race in May, the extra weight will be removed.
The butanol fuel is being supplied by Dyson's primary sponsor, British Petroleum. Butanol has a
number of advantages over ethanol as a fuel, starting with energy density. Gasoline has 32
megajoules per liter while butanol has 29.2 MJ / L and ethanol has only 19.6 MJ / L. Butanol also
has a much lower heat of vaporization than ethanol, allowing for easier cold starts. Because its
characteristics are closer to gasoline, it can be used without resorting to stainless steel fuel
lines and higher flow injectors. However, its high melting point requires it to be blended with
gasoline to prevent gelling in cold weather.
Gallery: Dyson Racing
Mazda-Lola at Mid-Ohio
   
Photos by Sam Abuelsamid / Copyright (C)2010
Weblogs, Inc.
[Source: International Motorsports Association]
Continue reading American Le Mans Series approves butanol, Dyson-Mazda to go
first
American Le Mans Series approves butanol, Dyson-Mazda to go first originally appeared on
Autoblog on Mon, 15 Mar 2010 08:01:00 EST. Please see our
terms for use of feeds.
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Enerzine.com - Biocarburants - news -
14 hours and 20 minutes ago
Sundrop Fuels, une startup basée
à Louisville dans le Colorado (USA) affirme avoir mis au point un moyen plus propre et
plus efficace pour transformer la biomasse en carburants de synthèse en tirant parti de la
chaleur intense du soleil pour vaporiser les copeaux et les résidus de bois.
"Notre processus peut produire deux fois d'essence ou de diesel par tonne de biomasse par
rapport aux systèmes classiques de gazéification biomasse" revendique la
société.
La gazéification se produit lorsque la biomasse (sèche) ou d'autres
matériaux carbonés sont chauffés à plus de 700
ºC en présence de vapeur. A ces températures, la plupart de la
biomasse est convertie en un gaz synthétique. Ce gaz de synthèse est
constitué d'hydrogène et de monoxyde de carbone, qui sont des
éléments chimiques que l'on retrouve dans des carburants tels que le
méthanol, l'éthanol et l'essence. Le problème demeure que la chaleur requise
provient généralement d'une partie de la biomasse, elle-même. "Vous
finissez par brûler 30 à 35 % de la biomasse", explique Alan Weimer, professeur
de génie chimique à l'Université du Colorado, Boulder.
La réponse apportée par Sundrop se trouve dans le système de
gazéification solaire qui est constitué de tubes en céramique traversant le
four. Le gazogène est monté au sommet de la tour, là où se trouve le
concentrateur solaire. Lorsque la biomasse tombe dans les tubes en céramique, elle se
vaporise en gaz de synthèse à cause de la chaleur intense qui s'y
dégage.
Le système serait en mesure de traiter n'importe quel type de biomasse, car les
températures varient entre 1200 et 1300 C°. De plus, on sait que les
températures les plus élevées rendent le gaz de synthèse de meilleure
qualité.
La construction de la première installation commerciale de Sundrop est attendue dès
cette année. La société envisage de coupler son usine de
gazéification solaire avec un projet pilote de bioraffinerie capable de produire
jusqu'à 30 millions de litres de carburant chaque année.

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