Introduction
Well the title’s a bit misleading, actually I’m going to talk about all sorts of things that reduce our dependence on oil. I’m going to try to cover the basics of how to fix the oil problem from the perspective of cars and automotive technology, rather than supply side aspects of either increasing availability or increasing efficiency (and thus lowering costs) of oil production.
While this is largely a political blog–and I’m a blatant free market supporter–I intend to stay away from those issues for the most part, such as the recent Democrat blocking of the building of new refineries (which would’ve increased both efficiency and supply, thus reducing price), the ludicrous current attempt to increase CAFE standards, or how futures markets actually work. Although those are worthy of discussion (perhaps more so than automotive technology), they’re beyond the scope of what I want to do here. Besides, this is for the Carnival of Cars.
We’re going to talk about hybrids (bad), hydrogen (bad), fuel cells (meh), ethanol/internal combustion (good), worn vegetable oil/Diesel (good), and a couple of other smaller technological changes either on the horizon or . It’s going to be a pretty superficial view, but I’ll try to link to sources that can extend your search for information if you want. Or, google’s there too.
Hybrids
Hybrid this, hybrid that. Nothing pisses me off more than claiming that hybrids will solve the problem. Sadly, a majority of people seem to believe this. Including some of my fellow med students. So first thing is a quick and dirty lesson in the physics of hybrids.
Cars need energy to do their thing. They need energy to go from a stop to 40 mph. They need energy to stay at 40mph because of wind resistance, friction between the tires and the road, and friction inside the drivetrain (which is why you can’t just idle at whatever speed you want). And cars also need energy to stop. While the engine takes care of the first two, the brakes take care of the third. This energy is supplied by the friction between the brake pads and the discs (don’t ask me how drum brakes work), and then dissipated as heat. Which is why the discs on roadrace cars look like they’re glowing so much of the time, they’re doing a lot more work than our brakes do.
What a hybrid does, on the other hand, is take some of the energy the brakes use when you come to a stoplight, and store it as electrical energy in the batteries. It then uses that electrical energy to turn the wheels of the car when you leave that stoplight.
See the problem? Hybrids get their mileage increases by storing your stopping energy. That means the more you stop, the more your mileage will increase. Now, out here in OKC, I use my brakes only four times and come to a complete stop only twice on the 15 mile journey from my house to med school. And these stops are from 45 and 35mph. I spend most of the drive, on the other hand, at about 70 mph. So exactly how much would a hybrid increase my fuel efficiency? Not a whole lot. The energy it takes just to get me to 70mph is twice as much as the energy that could be stored from both of those stops, and that assumes perfect efficiency on the part of a hybrid mechanism. Which means the only savings I’d get would be roughly half of what I spend from the time I hit the onramp to the time I merge. Even if we’re going to be charitable, we’re talking about a mile or two per gallon here, roughly 6% increase. Not exactly earthshaking change here.
Do hybrids make sense for some people? No doubt. If I were living in NYC, or Dallas, or out in So Cal, I’d be stopping a whole hell of a lot more. The number of stops (and the number of starts) I make would be many, many times more during the same length drive, so my savings would be a lot more. But unless you’re in one of those places, we’re talking several thousand dollars more for an incremental increase in gas mileage. Not cost effective. And if you do live in one of those places, why aren’t you using public transit? It’s what I used, with no qualms whatsoever, when I lived in a big city.
Hydrogen
Now the major problem with hydrogen is that it can’t actually be found or mined; it has to be manufactured. In other words, your ‘hydrogen-powered’ car is actually coal, nuclear, hydroelectic, or *gasp* oil powered. You need energy from a separate source to make hydrogen. It’s an energy currency not an energy source. There is talk about certain kinds of bacteria and their ability to emit hydrogen gas, but they’ve been saying that since I was in grade school 10 years ago, and still no practical large-volume production techniques exist.
The biggest problem with hydrogen, more than the fact that you have to make it using energy, is the fact that this process isn’t that efficient. Meaning you actually expend more energy making hydrogen than you do using it. Which is something of a problem, ain’t it. Widespread use of hydrogen would actually reduce our energy supply.
My final comment on hydrogen is that there is an entire industry that makes a lot of money because hydrogen is so hard to produce, store and use. Doesn’t seem like the smartest place to start given that, let alone all the theoretical problems with it.
Fuel Cells
First time I remember reading about fuel cell cars was in 3-2-1 Contact Magazine in the early 1990’s. All the buzz around them is now dead. Couldn’t say why, I don’t keep as good tabs on that as I do on the other stuff. They seem alright in scooters (I know it looks like a motorbike, but performance and capability wise, it’s a scooter). And in mass transit vehicles. Part of the problem of course is their huge expense. As expensive boutique items or when the costs are defrayed by the 50 or so people that can ride in a bus they’re probably fairly cost effective. Just not in cars that tend to have only one or two people in them at a time. Another of course is that many fuel cells use hydrogen. See above. Others use methanol, which seem to be doing alright. But as power producers, fuel cells have a pretty bad performance/weight ratio. Besides, if you’re going to use alcohol for power, why not move on to…
Ethanol
I’m not a drinker, but I sure as hell like the idea of ethanol powered cars. So does Brazil. Why? First thing is we can largely use existing technology. For around ten years several Ford engines (the 3.0 and 4.0V6 come to mind) came ready to use ethanol straight from the factory (called flexfuel vehicles because they could use both gasoline or ethanol). They stopped because no one seemed to care, so why spend the extra couple dollars on the ethanol-friendly parts? GM, seeing the writing on the wall, has just started doing it. Literally all engines currently running on gasoline can be adapted to use ethanol readily and fairly cheaply. And there ain’t much power loss.
And what about supply? Actually that’s probably one of the biggest benefits of ethanol. Due to farm subsidy rules, about 40% of our corn crop is simply burned or destroyed every year. If you’ve seen either GM’s or Ford’s flex fuel logos you’d know that corn is what car ethanol would be made of. And if a walk through the supermarket only illustrates 60% of our corn supply, that’s a lot of unused raw material for fuel production. It’s true that Brazil has the advantage of sugar cane and a tropical environment, meaning that ethanol could be produced more cheaply and more effciently over there. But at current levels of oil and gas prices, ethanol has actually become cost competitive even using our inferior corn. I know a lot of people don’t like the current gas prices, but honestly, if 3 dollars a gallon for the forseeable future is what we gotta pay for cleaner air and weaning ourselves off oil, I’m totally down for it. And don’t forget that once ethanol sees more widespread use as an actual commodity expenditure on research and design of ethanol production will skyrocket. Production will increase, it’ll grow more efficient, and while it’ll never be as easy as in Brazil, it’ll be a ton cheaper than right now in our extremely production-limited situation.
From a technical standpoint, ethanol is the simplest to implement. Factory re-tooling would be minimal and could probably be accomplished within the space of a single year. Although not many, there are and have been ethanol stations all around the country. It’s totally clean burning (unlike hybrids). And, unlike all of these other technologies, we could retrofit cars already on the road to run on it very easily (I’m considering it for when my warranty lapses believe it or not). From a supply standpoint, it looks pretty good too. Plenty of raw material readily available, easier to produce, store, and work with than hydrogen, and could probably just hijack the mid-grad octane pumps and put ethanol in their place (do you know anyone who doesn’t either put the lowest or the highest octane in their car?).
Biodiesel & Straight Vegetable Oil
Well, first traditional diesel. Diesel small cars on their own would be a large improvement. They’re more sophisticated and quieter than ever. I’ve had the good fortune to both drive and ride in newer generation small diesels, something you can’t do here. Unfortunately, the low-sulfur diesel that those little engines require was supposed to get here in around 2000, but was postponed–twice–to 2006. Which means missing an entire model cycle of production of high mileage little cars, and their effect on our oil consumption. As a former Ford Focus owner, I have to say the only thing that could’ve made that car better at its price point would’ve been a 1.8L TDCi just like you get in London.
If you’ve ever driven or ridden in one of those VW diesels and had something bad to say about the experience, you have to remember that because of those diesel problems, our engines are a generation or two behind the ones in Europe. They’re smooth, they’re quiet, and boy are those little torque-monsters fun. Not to mention the routine real world 50-60mpg they get. Heck, Vauxhall is showiong off its Eco-Speedster Concept, a diesel powered derivative of its popular Vx220, which is in turn based off the Elise.
Biodiesel and SVO are if anything an even better deal than ethanol. If your car has been converted for SVO use, you can literally use the vegetable oil that McDonald’s et al. throw out. Which has the cool side effect of exhaust that smells like french fries. And the conversion is if anything easier than for gas. If you use properly processed biodiesel, you don’t have to change a thing. If you decide to run unprocessed vegetable oil, there’s some work required, but not a whole lot. Relatively cheap kits to convert your little vw or pickup truck to SVO have been out for several years now. I’m less up on the supply issue, but like ethanol, it starts with leafy green stuff, and I do know it’s considerably cheaper than buying petro-diesel (unlike ethanol). And, as I mentioned, plenty is thrown out before it ever gets to market, let alone at the dinner table.
For more than you ever want to know about biodiesel, go here
Efficiency Increasing Technology
Continuously Variable Transmissions can increase fuel mileage dramatically. A car has a different level of efficiency at different points on the tach. This is why I get better fuel efficiency at 80mph than I do at 70mph despite being in the same gear at a higher RPM…I mean, I don’t cruise at 80, officer. The CVT lets you sit in the fuel ‘efficiency sweetspot’ while you’re cruising no matter how fast you’re going. And the ‘power sweetspot’ when you accelerate. Which is a pretty cool deal. Now, as an enthusiast, I’m not a big fan of em because of the loss of the fun factor (have you heard a 4.6L 3valve as it approaches 5500RPM?). But 99% of car owners aren’t and would happily take the tradeoff.
Displacement On Demand. I haven’t been keeping up with it because I don’t want it on my car. Like I said, I’m an enthusiast and a tinkerer, and DOD hopelessly complicates the valvetrain and the computer interference. But most owners won’t even put a K&N filter on their car, let alone yank off the entire cylinder head so he can send it off to Livernois for porting and new cams. Heck, most owners don’t even know what cams are. This is a neat function because it basically turns your v8 into a v6. Pickup truck owners have probably noticed that their buddie’s 4.3L V6 gets better gas mileage than their 5.4L v8, even though both are driving automatic F150’s at the same speed with the same amount of payload. Same sorta effect with DOD.
We’ll leave it at that for now.
Conclusion
I do have to mention CAFE and EPA standards in passing. The first point one has to remember is that one of the things that is motivating us to develop new non-oil-based technologies is the price of oil. More and more people are looking at hybrids (misguidedly), one of my buddies is about to convert his truck over to ethanol, and Dad’s just sitting and waiting for the new generation diesels so he can convert one of them over for vegetable oil. As I mentioned earlier, part of what’s making ethanol viable in temperate zones is that gasoline has crossed the $2.50 mark. Even if manufacturers could meet the 40mpg CAFE standards I’ve heard talked about, all we’d get was a loss of that motivation when gas prices fell, and an apathy that would keep us sucking at oil’s teat.
While we’re on the subject of gas mileage, it’s important to note that the EPA hasn’t changed their testing regimen in the last 30 or 40 years. In other words the city stop and go portion is done at 30mph and highway is done at 55mph. Not the 40-50 and the 70-80 we actually find in the real world. Some of these hybrids because their engines are so small, keel over and die above 60, getting worse gas mileage than a large variety of conventional cars. Even talking the compact but conventional cars, their EPA ratings can look a lot worse than real life because they’re so far out of their efficiency zones at those highway speeds. Heck, my 2006 Mustang GT supposedly gets 18mpg in the city and 23 on the highway. Which is news to me, because I could’ve sworn it was doing 22 and 29, respectively. Maybe my odometer is broken.
Finally, I’d like to add that the enthusiasts among us whether we be drag racers, open track, dirt, show car builders need to start supporting those technologies that are both more effective and less intrusive. Whether hybrid, hydrogen, or fuel cell, we’re talking about the very soul of our cars being stolen. But ethanol-based and diesel cars have actually been competitive in the enduros like Sebring and LeMans, not only that but both of those were based on production engines in one way or another. In other words, if we go to ethanol, that’ll still be a 350 chevy in your driveway, and a Boss 429 in my dream garage. Our cars will change so imperceptibly we won’t even be able to tell the difference. For a guy like me, that’s pretty important.
Maybe I’ve changed some minds, maybe I’ve sparked some interest. But the reason I’m so ardently against most of this garbage, from CAFE to hydrogen, is because it’s just that. It’s more expense, it’s more difficulty, for no change in the status quo. But with the right technology, and an honest assessment, we stand to not only reduce emissions to near nothing as well as reduce our dependence on oil, but retain the automobile as we know it.
UPDATE: Courtesy of Mark Tapscott, I found this excellent (more technical) read by corndog about the benefits of ethanol. It’s a good play-by-play refutation of EtOH’s many detractors.