A possible look at the future

This is for non-Subaru related topics. Keep it realistic please.

Moderator: Moderators

All_talk
Third Gear
Posts: 613
Joined: Thu Dec 30, 2004 5:14 pm
Location: Thorp (Ellensburg), WA
Contact:

Post by All_talk »

wiscon_mark wrote:
Redlined wrote:I always wondered about that. I hear claims about how environmentaly friendly Diesel engines are. and yet I see diesels running around shooting plumes of black smoke.

How can something that emites so much.... smoke... be environmentaly friendly? Wouldnt that be polution? (not being a smart ass, generaly curious)
Just because its emitting more visibile smoke, doesn't mean its emitting more harmful stuff into the air. Although I would be inclined to think it does anyways.

Spelling fixed.
The black cloud that you see coming from a diesel is soot, the majority of which is pure carbon. Carbon is biologically inert and will do no harm or you or anything else, as it cools it falls back to the ground. Just like eatin the black part of that steak you over cooked on the BBQ. Now that’s not to say Diesels don’t have harmful emissions, it fact currently for that same gallon burned, diesels have more emissions than gasoline. But due to the greater work done (higher MPG) they actually create less pollutants per mile, and that’s the number that counts. If diesels had seen the same level of anti-emissions research and development over that last 30 years they would be miles ahead.

Your eyes can deceive you…. Knowledge is power.

Gary
No matter how broke I am... I always seem to find two cents.
wiscon_mark
Fourth Gear
Posts: 1141
Joined: Tue Sep 20, 2005 4:04 am
Location: Stevens Point, WI

Post by wiscon_mark »

Yeah, I figured it was something like that.

I think the figures are:

Gas converts 13% of its mass to usable energy

Diesel converts 25% of its mass to usable energy

So Diesel has a lot less left over mass to become emissions, and its more efficient, so less diesel fuel is being used at one time, cutting down on emissions...if they refined the technology...diesel could bridge the gap until we get hydrogen or some other resource.
[url=http://www.sl-i.net/FORUM/viewtopic.php?t=486]1995 Legacy Outback 5MT[/url]
185,000 miles
www.sl-i.net (for all Legacys!)
evolutionmovement
Knowledgeable
Knowledgeable
Posts: 9809
Joined: Mon Jun 16, 2003 11:20 pm
Location: Beverly, MA

Post by evolutionmovement »

Higher NOx, lower HC, CO, CO2 than gas due to higher temps, leaner mix. In Europe they have particulate traps to reduce the soot (which is a carcinogen). They're set to come here soon (waiting for low sulfur fuel) although it looks like they may use 'urea' an ammonia based chemical developed by Daimler-Chrysler and maybe others that is injected into the exhaust to convert the chemicals into less harmful substances. The problem is that these will need to be refilled. There's talk of making the car run in a limp-home feature if it runs out of urea so the customer will be persuaded to keep it filled.

Steve
Midnight in a Perfect World on Amazon or order anywhere. The first book in a quartet chronicling the rise of a man from angry criminal to philanthropist. Midnight... is a distopic noirish novel featuring 'Duchess', a modified 1990 Subaru Legacy wagon.
subawhatsubawho
Fourth Gear
Posts: 1443
Joined: Sun Apr 03, 2005 11:08 pm
Location: HELL...A.K.A South Florida
Contact:

Post by subawhatsubawho »

Sp it's the sulfur that makes me gag and my stomach turn when I am sitting behind a desiel in traffic.

Yuck!!
1991 Legacy BJ L 5MT AWD 189K Paid $100 STOLEN 2/13/06
All_talk
Third Gear
Posts: 613
Joined: Thu Dec 30, 2004 5:14 pm
Location: Thorp (Ellensburg), WA
Contact:

Post by All_talk »

Steve makes two good points… The US is still waiting on low sulfur diesel fuel and the soot does carry some carcinogens called polycyclic aromatic hydrocarbons (PAHs), and methods to reduce them and remove the soot from the exhaust will be important.

Gary
No matter how broke I am... I always seem to find two cents.
206er
Fifth Gear
Posts: 2590
Joined: Wed Jun 04, 2003 4:24 pm

Post by 206er »

All_talk wrote:
206er wrote: whats worse, is that we are RAPIDLY approaching whats known as peak oil. in other words oil production for a given supply can be described by a bell curve, and we are nearing the peak of that curve for world oil. best estimates are 2008-2011. after that, the supply will begin to decrease while worldwide demand keeps increasing. the economy is basically fucked. and btw this is not a hoax or conspiracy theory.
stuff like biodiesel and kinetic energy is hopefully what will save us.
Not to be argumentative, but this “Peek Oil” biz is bunk, it shows a fundamental misunderstanding of economics and existing technologies. Now I’m not saying oil production wont reach a peek then decline, it certainly will, though I don’t think we will see it by 2011 as we haven’t even used 50% of the know reserves. But the part about the economy being fucked is a bit simplistic at best, its not like the oil is going to dry up overnight, as the supply goes down the cost will go up. There are other current technologies and near future ones that will transition, the real factor is cost, right now oil is cheaper, and by a good margin, when the cost equates with other options they will gain favor. This changeover may lag consumer need and that may cause some pain (mostly in the pocket book). The challenge here (without addressing the political/big business roadblocks) is to identify the near and far transitional technologies and work to have them ready, including production and distribution plans. The bottom line is that the economy will adapt, as will we, some of our now common habits may prove to cost prohibitive in the future… things change.

Something to keep in mind here is that all of this, hybrids, fuel cells, even the internal combustion engine are intermediate, there are two things that will bring us to a sustainable energy state... efficiency, using less energy to do that same work, and getting that energy from truly renewable sources. I think that someday we will have to go directly to the source… the sun.


And as to why we haven’t see diesel Hybrids yet… it’s a mater of marketability, diesel has a bad rap in the US with the environmental types that would by a hybrid, why build a car that nobody will by. But Europe doesn’t share the same misguided view, diesel hybrids will likely prove themselves there and we will take interest when they are getting 100+mpg.

Gary

I guess my other post was a little simplistic and made it sound like I thought biodiesel and hybrids were the final solution, no way. I agree that they are merely a transitional solution to something like cold fusion(ha ha). although biofuels technically are a form of solar energy. :wink: kinetic energy should be around for a while though, and I wouldnt be surprised to see it really take off. definitely not a complete solution, but there wont be ONE complete solution, more like a bunch of smaller ones.
one of the greatest things about biodiesel is how easily it can be integrated into the current infrastructure. I know WA is really pulling for it.
the first 50% of the oil is the easiest and cheapest to extract. why do you think they are looking at oil shale in CO and already mining tar sands up in canadia? the costs of a barrel are just going to skyrocket when the cost of extracting it and refning it skyrocket. not to mention that the worlds population and oil demand is not exactly shrinking. look at what is happening as china is trying to catch up to our levels of materialism.
peak oil is not bunk. it has been predicted accurately time and time again by the geophysicists, and micheal simmons is convinced thatt drastic consequences are ahead if we dont get our act together yesterday, and he is one to pay attention to. look at just how much our society revolves around fuel! at any rate, there is no way the economy can avoid taking a hit. which I guess you agree with, though I wouldnt poo poo it as a little hit to the consumer pocket book. and I dont think micheal simmons has a "fundamental misunderstanding" of economics, especially as they pertain to energy, nor do I. I know what technology is out there, and I read the newspaper sometimes.
I fully agree with everything else you said though.
1994 Touring Wagon: ruby mica, 5mt swapped
entirelyturbo
quasi-mod-o
quasi-mod-o
Posts: 6000
Joined: Thu Dec 05, 2002 7:06 pm
Location: Tampa, FL

Post by entirelyturbo »

evolutionmovement wrote: he problem is that these will need to be refilled. There's talk of making the car run in a limp-home feature if it runs out of urea so the customer will be persuaded to keep it filled.
"Daddy! We need to stop so I can go to the bathroom!!!

"We don't have to stop son! You see that hose right there coming out from underneath the floorboard??..."

:lol:
"Der Wahnsinn ist nur eine schmale Brücke/die Ufer sind Vernunft und Trieb"

*Formerly DerFahrer*

@entirelyturbo on social media, including Facebook, Instagram, Twitter, and TikTok
Post Reply