Showing posts with label transportation. Show all posts
Showing posts with label transportation. Show all posts

Monday, August 10, 2009

The Coolest Electric Car

Over the next couple of years, there will be several electric vehicles hitting the market. This is a good thing. The electricity that powers EVs can come from wind power, clean natural gas, or coal—options which are all cleaner than gasoline. Reducing our dependence on foreign petroleum will give the U.S. more flexibility in its approach to foreign policy. Politicians have been warming up to EVs for these reasons, and most of the major automakers have EVs planned. Of all the EVs planned, my favorite is the Aptera 2e.

Aptera Motors is a Silicon Valley startup that began as an experiment to design the most aerodynamic vehicle possible. That aerodynamics was the primary driver of the Aptera’s shape is, ahem, evident. The car looks like a raindrop, which is unsurprising because a raindrop is the most aerodynamic shape (Drag coefficient of 0.04).

The Aptera will have a Cd of 0.15, making it the most aerodynamic car in history (the EV1 holds the record now at 0.19) and almost twice as aerodynamic as the Prius and Chevy Volt (Cd’s of 0.25).

The entire body is one composite piece, making it very light and strong. The Aptera will weigh in at 1500 lb, less than half the weight of the Volt (3500 lb) and light enough to be manhandled by Dutch hooligans.

The result of the Aptera’s clever design is a car that will use almost FOUR TIMES less energy than a Chevy Volt. This means driving 100 miles will cost $1.13 in an Aptera, compared to $4.52 in a Volt and ~$10 in an average new car today (DC electricity prices).

This is in addition to lots of other cool features, like a PV panel roof that powers the AC so your car is cool when you get in, a built in computer named Eva that "likely has twice the computing power of any machine in your house", and the ability to sell electricity back to the grid when electricity price is high. The Aptera also isn’t as small inside as it looks, with more than twice the storage space of an Accord and more headroom than a Mini.

Unlike the Volt, the Aptera 2e does not have a range extender and will run out of juice after 100 miles. However, I don’t think this will be a problem since 95% of people drive less than 100 miles a day and over 50% of households have more than one car. I see the Aptera as a second family car, used mostly for commuting. (They're working on a range-extended version that will have a 650 mile range and get 300 mpg).

The Aptera will be going on sale later this year for ~$26,000. The Chevy Volt is expected to come in at around $40,000, but qualify for a $7,500 federal tax credit. The Aptera won’t qualify for this tax credit because it only has 3 wheels.

I think the Aptera represents a new paradigm in car design. The Aptera was designed with one purpose: get people from point A to point B as efficiently as possible. Form follows function, and results in a car that is unique and looks cool. This makes me wonder why cars today look the way they do, and why they all look basically the same. Maybe its what consumers are used to, and what car companies think will sell. Hopefully the Aptera will challenge our conceptions of how a car should look and be used.

So, what do you think? Is the Aptera just another silly venture capital idea that consumers will pan, or is there a market for it? Will people buy a car that looks like it’s from Trek and only goes 100 miles between charging? Is the Aptera represent a new era for how we approach the automobile? Jay Leno sure thinks so!

Sunday, August 9, 2009

Purple Line Greener Future

Maryland Governor Martin O’Malley recently decided that the Purple Line, a planned transit corridor connecting towns in Montgomery and Prince George’s Counties in Maryland, would be light rail transit, rather than the bus rapid transit alternative. This announcement marked the culmination of years of deliberation, community activism, and analysis by residents, local politicians, and even a nationally-recognized environmental organization, the World Resources Institute. Interestingly, WRI submitted a detailed public comment that endorsed the Bus Rapid Transit (BRT) alternative rather than LRT. Let’s examine WRI’s assessment of the Purple Line’s Alternative Analysis/Draft Environmental Impact Statement (AA/DEIS) and why they favored BRT over LRT.

By doing a Monte Carlo sensitivity analysis on the AA/DEIS by creating a scenario where the AA/DEIS projections of ridership and cost are optimistic, WRI found that the LRT option carries more risk of not meeting cost-effectiveness goals, and the BRT option is more robust. In other words, for the expected value of benefits, ridership, and cost-effectiveness based on different scenarios of independent variables, BRT trumps LRT. However, WRI did not add a “pessimistic scenario” where the AA/DEIS actually under-predicts daily ridership. I found this curious, but then looked into projections more and found that Metro ridership projections in 1969 predicted 959000 daily trips in 2004, while the actual figure stood at only 653000 (“The Great Society Subway” by Zachary Schrag). Maybe there is something to Washington area transit planners being overly optimistic.

WRI goes on to analyze the greenhouse gas emissions projections of different scenarios. In the AA/DEIS scenario, the BRT alternatives are the only ones that produce decreases in CO2 emissions. However, WRI points out that the AA/DEIS used an all-Maryland emissions factor for electricity, rather than the finer granularity offered through the EPA’s e-GRID database. They find that by looking at individual zip codes, the LRT alternative is less emissions-intensive but still positive. While WRI mentions potential changes in electricity generation emissions in Maryland through 2030, I think it is important to note that this is where the LRT alternative has a big advantage over the BRT alternative: if steps were taken to connect light rail to a carbon-free electricity source, such as a potential new nuclear reactor at Calvert Cliffs, the LRT option would become virtually emissions-free, while the BRT option would be locked into whatever type of vehicle (diesel or CNG) is chosen for operation.

For the last year I’ve lived very close to one of the planned future stops of the Purple Line in East Silver Spring. Nearly every day I see the purple “No Train on Wayne” signs planted in front yards interspersed with the less common purple and green “Purple Line/Greener Future” signs. If my condo association allowed signs in windows, I’d have put a few of the “Purple Line/Greener Future” ones there, because I’ve spent the last two years wishing there were a better way to traverse the criss-crossing boulevards connecting Silver Spring and the University of Maryland. A dedicated right-of-way transit route directly linking Silver Spring with Bethesda will be a boon for commuters who today need to bear the congestion on East-West Highway either in cars or on a J2/J4 MetroBus. Personally I’m happy with the governor’s decision because I think the LRT option will, over the lifetime of operation, yield higher emissions reductions and reduce road congestion more than the BRT alternative.

Thursday, August 6, 2009

Cash for Clunkers: Handout or Good Idea?

Tonight the Senate voted to approve $2 billion in additional funding for the wildly popular 'Cash for Clunkers' program. Sadly, no Senators consulted our expert opinions on the topic before casting their vote. If they had, we would have told them that the program is TERRIBLE way to provide economic stimulus and reduce pollution, and they should only vote on it if they want to get re-elected. Then they would have laughed at us and voted for it anyways.

The goal of cash for clunkers is twofold: provide economic stimulus and reduce emissions. By giving consumers a $4,500 rebate toward a new car with a trade-in, politicians hope consumers will be more likely to cough up some cash, boosting the economy, and finally get rid of that old SUV.

So how about that economic stimulus? Industry analysts have recently forecast that of the 250,000 cars sold under the first version of cash for clunkers, only 40,000 would not have sold this year anyways. There other 210,000 is simply demand that has been pushed forward. Demand that has been pushed forward a few months isn't economic stimulus in my book. Only 16%, or $720 of the $4,500 rebate, is economic stimulus. The other $3,780 is simply a handout for people who were looking to buy cars anyways--it would be easier to just mail them a check.

Well, what about emissions? Clunker emissions come from two main sources: burning gasoline, and the car's construction. Scrapping a car under the program will increase fuel efficiency (from 15.8 mpg to 25.4 mpg on average), but reduce the clunker's operational life (from 193,800 miles to 138,000 miles on average). Therefore, you can expect to save 1,300 gallons of gas by scrapping your clunker early instead of waiting until it finally dies. However, because you scrap the car early, the energy required to make the car is 28% higher on a per-mile basis. Fuel consumption goes down, but manufacturing energy goes up.

Translating this to emissions, scrapping a car will result in 3.6 tons of CO2 less being emitted from burning fuel. However, manufacturing emissions go up by 3.2 tons of CO2 due to scrapping the car early--resulting in net emission reductions of only 0.4 tons of CO2. What a boondoggle.

Remember the $3,780 that wasn't economic stimulus? Perhaps we can say it is investment in clean energy. This translates to a carbon price of $9,450/ton CO2. The EU carbon market is pricing CO2 at ~$20/ton CO2 right now, meaning cash for clunkers is almost FIVE HUNDRED TIMES more expensive than pricing carbon through a market based system.

Cash for clunkers, we here at TPG really wanted to love you. But if any Senators ask us, we'll tell them you suck.