Archive for the ‘vehicles’ Category

The new bike sharing: high-tech low-tech fusion

Thursday, August 5th, 2010

Earth2Tech has a nice story about how GPS and mobile technology are spurring a renaissance of urban bike sharing. This excerpt gets to the heart of the matter:

As it becomes increasingly common for consumers to have web access on the go – and operators can use sensors and real-time communication to flag available docks and bikes — barriers to adoption are falling away. It’s just plain easier to find a station and a bike that’s ready to roll. And with GPS chips that can locate you, a bike, or a parking spot, operators have a tool for tackling the bane of bike sharing networks of yore: theft.

Easing range anxiety

Thursday, August 5th, 2010

As electric vehicles from major carmakers near the market, folks are focusing on range anxiety — the concern that an electric car will run out of juice and leave you stranded. Here are a couple of potential solutions: mobile technology to help you keep track (see The Answer to Electric Vehicle Range Anxiety: Mobile Tech) and wireless charging so you don’t have to remember to plug in (see Can Electric Vehicles Lose the Plug? and Plug-free electric cars’ hidden cost).

Cities sans cars

Monday, June 28th, 2010

Scientific American’s 60-Second Earth blog post Are Modern Cities for People or Cars? gives a good description of the international exhibit Our Cities Ourselves, now in New York. Our Cities Ourselves tasked 10 architects to consider 10 cities from the perspective of cars versus people.

For more on sustainable urban transportation, check out Reclaiming the Streets: Urban Transportation Innovations.

Fast car charging

Monday, June 28th, 2010

A Nikkei Automotive Technology article about a prototype superfast electric vehicle charging system brings to mind the perception of range limitation. These new electric vehicle charging times — five minutes or so — are short enough for us to get past the idea that electric cars are limited in how far they can travel. Here’s an earlier post with more thoughts on the subject.

Volvo gets in on shapeable ultracapacitors

Thursday, February 25th, 2010

Looks like shapeable ultracapacitors have caught the attention of at least one car maker.

Volvo is looking to build energy storage into the bodies of its cars. In particular, the company is working with researchers at Imperial College London on carbon-fiber panels that are both structural and ultracapacitors.

From a New York Times Wheels blog post:

  • According to Emile Greenhalgh, the Imperial College aeronautics engineer who is coordinating the three-year project, “Our lightweight carbon-fiber panels can carry a mechanical load and store energy simultaneously, and we’re working toward achieving a 15 percent weight savings in a Volvo hybrid test car.” The ultracapacitors won’t replace the battery pack in hybrid cars — that’s still down the road — but their presence can make it smaller, lighter and cheaper.

The ICL project is along the lines of work being done by startup Paper Battery Co. and Stanford researcher Yi Cui. The ICL work is focused on multifunctional composite materials that can be used as structural components. The Paper Battery Co. and Stanford research is focused on producing shapeable, high-performance ultracapacitors that can be added to structural components.

Report on ultracapacitors: major advances on tap (updated)

Tuesday, February 2nd, 2010

You’ll be hearing a lot more about ultracapacitors in the next few years. The devices are poised to transform energy storage by taking over high-power functions from batteries in three key areas:

* Tying wind and solar farms to the power grid
* Stabilizing the grid
* Powering hybrid and electric vehicles

The ERN Research report, Ultracapacitors: Emerging technologies for high-power energy storage, analyzes ultracapacitor technologies for these large-scale applications.

The report details ultracapacitor types, emerging ultracapacitor applications, the components that make up ultracapacitors, the factors that contribute to ultracapacitor cost, performance variables, and future directions.

The report includes detailed profiles of

* 15 startups that are readying potential ultracapacitor breakthroughs
* 27 manufacturers and 29 other companies that have recently developed ultracapacitor technologies
* 52 researchers around the world who are pushing the boundaries of ultracapacitor science and engineering

Some highlights:

One of the hottest ultracapacitor technologies is electrodes made from closely-packed, vertical carbon nanotubes. These prototype electrodes store an order of magnitude more energy than today’s best commercial devices. Players to watch include MIT spinoff FastCAP Systems, research firm ADA Technologies and major ultracapacitor manufacturer Nippon Chemi-con.

Much ultracapacitor development is aimed at driving down costs. This usually means making cheaper carbon electrodes. Players to watch include startup SolRayo, activated carbon maker Reticle, research company TDA Research and University of Kentucky researcher Stephen Lipka.

Electrolytes are another key area, and ionic liquids and lithium are the hot topics. Players to watch include ADA Technologies, Kansai University’s Masashi Ishikawa, Bologna University’s Marina Mastragostino and research company LithChem.

Meanwhile, cutting-edge materials and nanotechnology research promise to push the boundaries of ultracapacitor technology. Researchers to watch include Yonsei University’s Kwang-Bum Kim, University of Texas’ (and Graphene Energy, Inc.’s) Rod Ruoff, MIT’s Yang Shao-Horn and Florida State University’s Jim Zheng.

Given the expected boom in ultracapacitors over the next five years and the differences among application requirements, it’s likely that there will be room for several emerging technologies to reach the market.

Ultracapacitor energy storage capacities are likely to increase by five to 10 times in the next five years, but ultracapacitors aren’t likely to make batteries obsolete. They will, however, replace batteries for many power-intensive applications, including hybrid vehicle acceleration and regenerative braking.

Several laboratory ultracapacitor prototypes are already providing 10 times the power and capacity of today’s commercial ultracapacitors. The key question is how readily these materials can be mass-produced and whether they can be made cheaply enough.

Biofuel chemistry — taking the sugar out

Thursday, January 7th, 2010

Turning biomass into liquid fuel isn’t all that difficult, but doing so cleanly and efficiently involves some tricky chemistry. Researchers are working on catalysts that completely convert precursor liquids into final products and that can be readily recovered and reused.

A paper in the current issue of Science details double-sided nanoparticles that accomplish both goals by collecting at the water-oil interface. Accompanying the paper is a perspectives article by University of St. Andrews’ David J. Cole-Hamilton.

The chemistry professor does a nice job of putting things in perspective with a nifty image. He asks us to imagine stirring milk and sugar into a hot cup of tea and then extracting the sugar. He points out that in biofuels processing, the “sugar” is catalysts that are often highly toxic.

So green biofuels processing requires more than just mixing oil and water. It also means finding ways to get the sugar out.

2010: Key year for EVs?

Saturday, December 19th, 2009

With the backdrop of good (A123 and SAIC) and bad (Boston-Power and Saab/GM) news for battery startups, a market research firm and a venture capital firm have offered predictions about hybrid/electric cars for 2010.

Pike Research’s study calls 2010 a crucial year for hybrid/electric vehicle technology and identifies a challenge: attract buyers beyond the environmentally conscious. Here’s Cnet’s writeup.

Lightspeed Venture Partners’ predicts that hybrid/electric vehicle startups will enter the market, fleet operators will adopt hybrid/electric vehicles, and there’ll be notable progress and increased competition in advanced car batteries.

Two speeds better than one

Friday, May 15th, 2009

Electric cars are poised to get two-speed transmissions. Compared to today’s one-speed transmissions two speeds cuts energy use by 5 to 10 percent, according to the transmission maker. Here’s the Green Car Congress story.

Fuel cells and Federal favor

Monday, May 11th, 2009

The Obama administration’s decision to cut spending on fuel cell vehicles came as a bit of a surprise, especially given the money the Department of Energy is putting into alternative vehicles in general.

The Wall Street Journal’s Keith Johnson asks if the decision amounts to the government picking a winner. I’d say they’re picking off a loser.

No alternative technology is likely to knock the gasoline-powered internal combustion engine off its throne by 2020, according to a Boston Consulting Group study. But batteries and biofuels are a better bet for making an impact in the next decade than fuel cells.

Electric vehicles benefit from the success of hybrids and the anticipated success of the coming wave of plug-in hybrids, particularly with oil prices expected to be in the midst of a significant rebound when plug-ins hit the market. Carmakers have stepped up their investment in battery R&D.

Although biofuels are a harder case to make than batteries, they benefit from a low cost of deployment. Assuming we can develop an affordable domestic supply of cellulosic biofuels, converting petroleum-based vehicles and fueling infrastructure is a minor cost.

In contrast, today’s fuel cells are expensive and have short life spans.

The clearest evidence against the picking-a-winner thesis is the carmakers. If they’d had a lot invested in fuel-cell vehicles you’d have heard a big outcry. How many images of sexy new prototype fuel cell vehicles have you seen in the years since the Bush administration touted the coming hydrogen economy? And how does that compare to images of electric vehicles, or even E85 vehicles?

At an MIT conference in March, Ford’s John Viera said the company is devoting more of its R&D to electric vehicles than hydrogen vehicles. You could make the case that instead of picking a winner, the government is following the market. More likely everybody is seeing the same thing, and all that’s changed is that the DOE’s Steven Chu is the first to abandon the talking points about agnosticism and say, and publicly act on, what everybody is thinking.

Viera made another point at the conference: alternative vehicle technologies are expensive and it’s going to take innovative business models to make them affordable. His comments were in the context of praising Better Place, the electric vehicle infrastructure company whose CEO is skilled at charming heads of state. If there are people working on innovative business models for fuel-cell vehicles, they’d better hurry up and make a case.

It’s also important to note that even though the DOE has thrown fuel-cell vehicles under the electric bus, they’re still investing in long-term hydrogen-related research. The work at two of the 46 Energy Frontier Research Centers is applicable to generating hydrogen, the work at two others will advanced fuel cells, and the work at another will help efforts to improve hydrogen storage. None of this long-term research is likely to make an impact in the next decade, but in 20 or 30 years some of it could lead to breakthroughs that will have us talking about hydrogen again.