Over the last several years, I’ve seen a lot more interest in the idea of plug-in hybrids and/or all-electric vehicles. Most of the activity has been in the automotive markets – think the highly anticipated Chevy Volt – but more recently, there has been more attention paid to things like plug-in commercial vans, P&D vehicles and other lighter fleet-type applications. Several have been on display at shows this year.
On the surface, what’s not to like about plug-ins? No emissions! Almost no noise! More than acceptable range (they say)! Performance that can rival gasoline and diesel-powered vehicles! The answer is right here, the proponents proclaim.
From a technical standpoint, they’re probably right. It does appear, if the tests by several large P&D fleets are any indication, that plug-in technology is pretty close to being commercial, at least in some applications. I suspect it won’t be as pervasive as the true believers insist – does anybody really think that guys who work in the oilfields will give up their 300 hp Rams or Super Duty pickups for a plug-in? – but there will be many applications where it might actually make sense.
Still, one has to wonder about the overall impact a significant application of plug-in technology will have on air quality. Maybe not quite as much as some believe, simply because of where electricity comes from (and the correct answer is not from a wall socket).
A variety of technologies are used to generate power in the U.S. A lot of it comes through hydropower (think Hoover Dam), which is an effective, but somewhat exploited resource. They’re not making too many new rivers to dam these days.
There is some wind and solar generation capacity, even some nuclear, most of which dates back to the ’60s and ’70s. But the greatest percentage of non-hydro generation involves burning something – a petroleum based fuel, natural gas or that Black Devil, coal.
Say that over the next 10 years, we add five million plug-ins to the fleet, thereby removing five million vehicles driven by gasoline or diesel engines. It’s a victory for clean air, right?
Maybe not, because what it would mean is that somehow, we’d have to come up with a few additional gigawatts of electricity. Most likely, that would mean a slew of new powerplants would need to be built. By default and because it’s one of the easiest plants to get up and running in short order, some of them would doubtless be coal-fired.
It seems to me from a macro emissions standpoint, you might just be trading a bunch of small emitters for a lesser number of large emitters, with no real net gain in overall air quality. Yes, from a regulator’s point of view, it is easier to keep track of stationary powerplants than a few million wheeled vehicles. But it seems to me that in the grand scheme of things, you might end up merely shifting emissions from one place to another in a kind of whack-a-mole game.
And it might be a pretty expensive game to play.
Posted by dieselprogressreport