by ubercynicmeister » Sun 02 Apr 2006, 20:31:19
$this->bbcode_second_pass_quote('coyote', 'S')tarvid: your points are well taken. Especially the dig about political will, that's dead on. Deisel trains are already very efficient, and the diesel-electric trains Pigleg mentioned
(Green Goats) might help things more.
Coyote, they will only work where or if they have access to high-quality refined fuels. Problem: Where are we gunna get such stuff once Peak oil hits?
I can see the "ethanol" guys and the Biodiesel guys jumping in and saying the one can use either of them, but the internals of a modern diesel -electric locomotive are not conducive to allowing such fuels to be used much at all.
I *know* this because I was involved (at the very edge) of Caterpillar's efforts to use Ultra Clean Coal in diesels. I was little more than an interested observer, and at some distance - and I wasn't employed by them. The conclusion was that, since the Ultra Clean Coal was a slurry, the injector and injector pump would need complete redesigning as the injectors used the fuel as a means of cooling said injector.
The amount of cooling had to be pretty much well within a certain set of "standard" values, or the injector would overheat, then the "spray" tip would either fall off or burn away. In either case, your diesel stopped working. This seemed to happen within a very short time, measured in weeks, it was said.
Biodiesel has a better chance than ethanol OR Ultra Clean Coal of being used in modern diesel locomotives, but then we hit the SECOND part: electronics. No modern diesel
engine (that's just the bit that sits inside the locomotive, with the pistons & exhaust, etc) can operate without the electronics which now seem to festoon the darn things. OK, so if we get the fuel, then where the heck are we gonna get the incredibly expensive bits that the modern diesels need to operate?
Think I'm kidding? Ask yourself: where are the common-to-hand replacements for the high-quality Thyristors and inverters that can handle switching currents under 9,000 to 12,000 amp loads?
YUP, that's what the average diesel's alternator will happily pump out and do so for hours. Because of their highly specialised nature (read: expensive), these components tend to be made in a very few places, and the manufacture depends mightily (although somewhat indirectly) on masses of Oil being available.
Peak Oil also equates to Peak Complex Electronics.
But let's assume we fix that...and that's a big ask, too.
Modern diesel engines - because they tend to operate under such high loads - require lubricants that will be able to handle the immense heat and high pressures without either turning straight to carbon (it happens) or else emusifying with whatever water happens to be around and thus losing their lubrication qualitites.
And we have the ready-to-hand replacements for such available in commercial quantities right now? Remember: one diesel locomotive's sump (the bit where the oil ends up stored) will require somewhere over US$8,000 worth of lubricating oil to fill to the normal level from completely empty, depending - of course - on the size of the locomotive. Small ones require somewhat less, really big ones somewhat more.
Then think about the NUMBERS of locomotives: in Australia alone there are thousands of diesels. In the US, I'd say you're looking at tens of thousands of diesel locomotives. If that sump oil is of really good quality, you'll have a long life out of it. If not, you'll have to change it every few weeks, if not every few days. And yes, condensate (for reasons I do not fully understand) seems to really really enjoy forming in areas leading to sumps and it always runs down in there and thus the Oil needs to be water-tolerant, or else it will emulsify.
Begining to see the problems? These are the sort of things that confront the average Maintenance Manager for the average Rail Transportatioin company and beleive me they can cause all sorts of headaches.
There are alternatives, and very simple they are, and they create local employment and are easy to repair and can be made very very efficient$this->bbcode_second_pass_quote('coyote', ' ')I certainly hope that we start pushing in that direction as soon as possible; we're going to need to. But we really needed to do it many years ago.
Yes, you're right there...and even as I type the IDIOTS are planning to stuff yet more trafiic on yet more roads.
$this->bbcode_second_pass_quote('coyote', ' ')We're just too near the Peak now to have a smooth transition.
$this->bbcode_second_pass_quote('Hirsch Report', 'A') larger number of train routes could be outfitted for electric trains, but such a transition would likely be slow, because of the need to build additional electric power plants, transmission lines, and electric train cars.