Green Options

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It had to happen, just when we were beginning to think that plug-in hybrid and electric cars were the best things since sliced bread, someone has intimated that there may be a health risk involved in driving those vehicles.

You remember, the power line scare back in the ’70’s (which really hasn’t gone away) and of course the more recent flap about cell phones emitting dangerous electromagnetic fields to the brain. In case you want to read more on these issues, a specific Google entry should suffice.Now, before you go somewhere else, hang on, there’s more to this electromagnetic field issue than you may think. That’s coming up, along with a short tip of the hat to the man who got us started on our way to the world we live in.

As Benjamin reported on EcoGeek last week, even if all plug-in hybrid electric vehicles (PHEVs) were recharged by coal-based electricity, they would still be an improvement over regular cars. Take a look at this graph from Technology Review, who reported that “plug-ins always result in lower emissions than conventional cars.” They beat hybrids too, unless power is coming exclusively from coal:

Recently, I discussed the interaction between clean energy and the future of plug-in hybrid electric vehicles (PHEVs). The study cited makes it clear that unless we clean up power production, there isn’t much point in moving to PHEVs from regular, old hybrids (HEVs).

Interestingly enough, MIT has just come out with a new study, profiled by Green Car Congress, which studies all sorts of vehicle options and how each vehicle will perform in well-to-wheel greenhouse-gas (GHG) emissions. This study was done particularly on HEVs, PHEVs, battery electric vehicles (BEVs), and fuel-cell vehicles (FCVs). The MIT researchers came to the conclusion that ultimately, electric propulsion in automobiles could eliminate our dependence on petroleum, which to me sounds like an exciting prospect, regardless of GHG emissions.

GM’s plug-in hybrid electric car, the Chevy Volt, will have its lithium-ion batteries road-tested by end of the month. Engineers have already been testing the Volt’s electrical hybrid system, the so-called E-Flex architecture, but only with nickel-metal hydride hybrid batteries in place. The newer, more advanced lithium-ion batteries are seen as the key to to the vehicle, since they store energy more efficiently than other batteries of the same size.

Last week, GM engineers worked to replace the nickel-metal hydride batteries with lithium-ion batteries in three different test-vehicle “mules”. These trial vehicles have allowed engineers to fine tune and improve components of the vehicle system, before putting it all together into something that more closely resembles the final Volt production model. GM hopes to complete road-testing for the Volt by November 2010.

This is something I (and a lot of other people) have been wondering about for a while in regards to plug-in electric vehicles (PHEVs, like the Chevy Volt) and pure electric vehicles (EVs, like the Lightning GT and Subaru R1e). PHEVs are not a new thing, and they have been discussed on Gas2.0 before, but there is some interesting news that recently came out of Carnegie Mellon University suggesting that if we don’t make our power generation system less carbon intensive, PHEVs could have little benefit over regular hybrids (HEVs).

More after the jump!

As usual, Google is at the forefront of, well, everything. But this one is a little surprising: their philanthropic branch, Google.org, is putting $10 million into plug-in electric hybrid research and real-world testing. If you’ve been reading Gas 2.0 lately, you already know that’s as much as will be rewarded to the winners of the 2010 Automotive X Prize for revolutionary green car technology.

Last September, Google offered up the $10 million in a formal Request For Proposals (RFP), saying they wanted to invest in any company that would “accelerate the commercialization of alternative transportation that reduces vehicle fossil fuel use and climate emissions.” In other words, getting plug-in hybrids, fully electric vehicles, vehicle-to-grid capabilities, and batteries and other storage technologies on the market.

Plug-in Hybrids (PHEVs) have taken some undeserved heat lately, with the recent hullabaloo over their potential to drain U.S. water supplies. But as some readers pointed out, it all depends when you charge them.

This week’s report from Oak Ridge National Laboratory, which evaluated the impact of a substantial increase in PHEV ownership, found that nighttime charging of PHEV’s would not increase electricity demand over baseline levels. In other words, no (or very few) new power plants would need to be constructed if plug-in owners only charged their vehicles at night.

Not everyone is waiting until 2010 to get their first plug-in hybrid. As I reported previously, Hybrids Plus out of Boulder, CO, is offering conversions for the Toyota Prius and Ford Escape hybrids, turning them into 100 MPG+ superstars.

I’ve collected a little more background on Prius hybrid hacks, and a few more resources. Check out this video, which should give you a good feeling for what getting 100 MPG would be like:

French analysts have concluded that the wild popularity of gasoline-hybrid electric vehicles in the United States could potentially hinder development of more sustainable and advanced green vehicles:

Hybrid electric vehicles that run on both conventional gasoline and stored electricity can be no more than a stop gap until more sustainable technology is developed, according to researchers in France. They suggest that the adoption of HEVs might even slow development of more sustainable fuel-cell powered electric vehicles.

The researchers go on to argue that the “misinformed craze” for hybrids in the U.S. is creating a situation where every manufacturer must include hybrid technology in their portfolio in order to stay afloat:

For under $30,000, you will soon be able to buy an electric car with a 120 mile range, or a plug-in hybrid that gets 300 miles-per-gallon.

Sound like a fantasy, but this one could be coming to a dealer near you. Slated for release in late 2008, the company Aptera will be offering the initial limited release of their fully electric model Aptera Typ1, and the 300 mpg plug-in will follow in 2009.

While plug-in hybrids offer great increases in fuel efficiency, they may come at a surprising cost: water. A recent study from Environmental Science & Technology found that plug-ins require the consumption of 3 times more water, and the withdrawal of 17 times more water, than their gasoline counterparts. As Popular Mechanics pointed out last week:

A 30-mile commute in a gasoline-powered car would require the withdrawal of 18.9 gallons of water… The same commute in a plug-in hybrid electric vehicle (PHEV), meanwhile, would take a whopping 318 gallons…

So what accounts for the increase in water usage? PHEV’s don’t require water directly, but the power plants that power them do:

Any power plant that runs steam turbines uses water, whether fired by coal, natural gas, or nuclear energy, says King, a mechanical engineer at the Bureau of Economic Geology at UT. Many plants consume water by running it through cooling towers where it evaporates away. Plants can also tie up water resources via withdrawal, in which plants recycle water that is drawn from a reservoir.