Donate Bitcoin

Donate Paypal


PeakOil is You

PeakOil is You

Existing Tech Could Replace Fossil Fuels

Discussions of conventional and alternative energy production technologies.

Re: Existing Tech Could Replace Fossil Fuels

Postby Doly » Thu 12 Oct 2006, 04:55:13

$this->bbcode_second_pass_quote('The_Toecutter', '
')Even with America's dilapidated and strained grid, we'd be able to handle tens of millions of plug-in vehicles today without increasing existing capacity. If everyone were to all drive around in 300 Wh/mile Crown Victoria-sized EVs with no special attention to aerodynamics for a good 12,000 miles a year? We'd need about 25-30% more electricity to be produced. Much less new power would be needed if the norm were more reasonable midsize cars with very good aerodynamics(~150 Wh/mile consumption).


Where do you get these figures from? My understanding was that to turn all vehicles into electric we would need to roughly double electricity production.

$this->bbcode_second_pass_quote('The_Toecutter', '
')We'd reduce our supply of coal from 200 years to about 150 years with EVs and PHEVs. Plenty of time to get in place something sustainable, like wind, solar, biomass, and others.


I see two problems with that. One, that coal is polluting and a carbon dioxide source, leading to climate change. Two, that we have had plenty of time to develop sustainable technology in the last two centuries, and we haven't exactly done it, have we?
User avatar
Doly
Expert
Expert
 
Posts: 4370
Joined: Fri 03 Dec 2004, 04:00:00

Re: Existing Tech Could Replace Fossil Fuels

Postby yesplease » Thu 12 Oct 2006, 04:56:20

$this->bbcode_second_pass_quote('The_Toecutter', 'I') say let it stand on its own merits. It doesn't need tax credits so much as it needs someone to actually start producing these vehicles in large quantities(without mass production, price will be high).


Actually, from the DIY/limited use standpoint, I disagree. An add-on plug-in EV sytem, with a small pack, say enough for 30 miles at 30mph, and a small motor/controller designed for low speed/city use is definitely competative compared to the equivalent cost of gasoline over the same number of city miles, which is dictated by the number of cycles to 80% DoD the pack can stand.

For instance a Vette, which gets ~20mpg city, can have a 6 battery t-105 pack that takes it roughly 30m@30mph (150ah assumed), or 30m@20mph with stops/accelerations. For the first 15k miles, the money spent on the system will probably be what's saved in gas. But after the cost of the controller/motor/wheel/mounting (say ~$1k) is absorbed, the pack would save the driver ~$1k per 15k miles city. As the car gets smaller and it's city mpg increases, this advantage decreases, but is still present for almost all cars.

The flipside being that at highway speeds, it's not terribly cost effective. But, if the driver has a significant chunk of their commute spent in traffic, especially stop and go traffic on the highway, the pack could save quite a bit of cash, w/o the need for mass-prouction. This is reflected on the other end of the spectrum, with the Tesla Roadster trumping other high end ICE powered vehicles that don't have the advantages of mass production in terms of performance, and overall cost.

$this->bbcode_second_pass_quote('Doly', 'W')here do you get these figures from? My understanding was that to turn all vehicles into electric we would need to roughly double electricity production.


That's a huge simplifcation that comes from comparing the amount of electricity in a gallon of gas and the number of gallons we use directly to EVs. The problem is gasoline cars tend to be ~15% efficient, while EVs tend to be ~70% efficient at using the energy stored on the vehicle.

For a decent estimate, we can look at this Chevy S-10 conversion, and past data on the number of vehicle miles traveled to get an idea about how much electricity we'd need. According to the eia page, we traveled ~1.5 trillion miles in 1988, and ~1.7 trillion miles in 1996. We'll guestimate that right now we average ~2 trillion miles per year.

According to the NREL, a vehicle that gets ~25mpg EPA combined, needs ~10kwh to travel 45miles at 45mph, or, taking into account a significant percentage of city driving, something like 10kwh to go 35miles at 35mph, about the average speed and distance of the average driver. And since this vehicle is slightly more efficient than the EPA average, we'll drop that to 30 miles at 35mph for the average vehicle (something like 21mpg combined). So, we know that we have a rate of 10kwh/30miles, or 1kwh/3miles.

In terms of electricity, we'll need roughly (1kwh/3miles)(2trillion miles). Or about ~.7 trillion kwh per year. According to the CIA factbook, we consumed ~3.66 trillion kwh in 2003. So we would need ~20% of what we produce per year. The thing is, on average the grid is only at ~50-60% capacity, roughly 75% during the day and 25% at night. So when people drive home and plug their cars in, they could be set on timers so the increase in consumption happens when consumption is at it's lowest point.

The overestimate comes from assuming every car gets ~10mpg, and since there are 33.6kwh per gallon, and we drive ~2 trillion miles per year, we'd need 3.36kwh/mile, so (3.369kwh/mile)(2 trillion miles) is roughly 7 trillion kwh per year, or double current electricity production. The difference comes from the estimates for vehicle efficiency, half what the average new vehicle gets, and the difference in EV efficiency compared to ICE efficiency.

Another factor influencing EV efficiency is the limited capacity of battery packs. To have range similar to ICE powered vehicles, the EVs need to be better at rolling, and moving through the air. A side effect is they are also more efficient, which reduces the amount of electricity needed by a significant amount.

$this->bbcode_second_pass_quote('Doly', 'I') see two problems with that. One, that coal is polluting and a carbon dioxide source, leading to climate change. Two, that we have had plenty of time to develop sustainable technology in the last two centuries, and we haven't exactly done it, have we?


The counterpoint would be that we haven't developed sustainable technology because it's not profitable for big business to do so. Compare a 5kw solar system and EV that may cost $40k initially, but can allow the consumer to not pay any electricity or gasoline bills, and reduce the cost of repairs for the next 30-50 years depending on the longevity of the system/EV.

Over those thirty years, the consumer will not pay something that's significantly more than the initial $40k investment. In fact, they may realize that by having a small/aerodynamic EV, and switching to appliances that consume less electricity, they can opt for a smaller solar system, and save even more money. The most profitable business' are based off of services, not products that require replacement infrequently. Cars, and the fuel that powers them, are more profitable if they are inefficient and unreliable.
User avatar
yesplease
Intermediate Crude
Intermediate Crude
 
Posts: 3765
Joined: Tue 03 Oct 2006, 03:00:00
Top

Re: Existing Tech Could Replace Fossil Fuels

Postby ReserveGrowthRulz » Thu 12 Oct 2006, 10:50:28

$this->bbcode_second_pass_quote('Doly', '
')I see two problems with that. One, that coal is polluting and a carbon dioxide source, leading to climate change. Two, that we have had plenty of time to develop sustainable technology in the last two centuries, and we haven't exactly done it, have we?


Man in general is polluting, and everything we are doing has already triggered climate change, we just haven't seen the full consequences yet. So its not as though we can go BACK, so we if pollute more along the way making things better, oh well, its alrady a done deal.

And we don't build a sustainable society because its cheaper to date to build a disposable one.

In the end, its all about economics, even peak oil.
So....heading into our 3rd year post peak and I'm still getting caught in traffic jams!! DieOff already!
User avatar
ReserveGrowthRulz
Permanently Banned
 
Posts: 813
Joined: Fri 30 Dec 2005, 04:00:00
Top

Re: Existing Tech Could Replace Fossil Fuels

Postby ReserveGrowthRulz » Thu 12 Oct 2006, 10:56:26

$this->bbcode_second_pass_quote('yesplease', 'C')ars, and the fuel that powers them, are more profitable if they are inefficient and unreliable.


Yeah but I already resist buying domestics, which changes THIS dynamic quite a bit!!

Good breakdown on the increased electrical costs for running around in electric cars, I like it, makes sense, lines up with what I've seen estimated by others.

Of course, we still must have Doom because its required and the neocons need it as an excuse to not profit by making electric cars, but maybe this "required" Doom will happen to those still driving Chevys and Fords 10 years from now?
So....heading into our 3rd year post peak and I'm still getting caught in traffic jams!! DieOff already!
User avatar
ReserveGrowthRulz
Permanently Banned
 
Posts: 813
Joined: Fri 30 Dec 2005, 04:00:00
Top

Re: Existing Tech Could Replace Fossil Fuels

Postby sch_peakoiler » Thu 12 Oct 2006, 11:40:40

Yes those estimates paint a rosy picture. With approx. 150Wh per mile (or what is kilometer) it is no problem charging a large fleet of cars.

But one general question I wanted to ask. I constantly hear opinions like - it is mor profitable to produce unreliable cars etc.etc. But if electrical cars are so superior (which they are if we are to believe what is told here) why did not some non mainstream carmakers employ them as a break through solution.
I mean those corporations who profit from status quo, support status quo. But what is the profit of supporting status quo for those, whom it kills? Rover for instance?
http://www.detnews.com/2005/autosinside ... 144403.htm


an electrocar would come in handy for europeans - some of them pay more than 5 bucks a gallon.

It is hard for me to believe nobody started producing such cars because of a market conspiracy. While for DC, BMW, Ford it seems logical, for rover, and a couple of other minor carmakers - it does not.
There is no knowledge that is not power.
User avatar
sch_peakoiler
Tar Sands
Tar Sands
 
Posts: 555
Joined: Sun 15 Jan 2006, 04:00:00

Re: Existing Tech Could Replace Fossil Fuels

Postby ReserveGrowthRulz » Thu 12 Oct 2006, 14:40:16

$this->bbcode_second_pass_quote('sch_peakoiler', '
')
But one general question I wanted to ask. I constantly hear opinions like - it is mor profitable to produce unreliable cars etc.etc. But if electrical cars are so superior (which they are if we are to believe what is told here) why did not some non mainstream carmakers employ them as a break through solution.
I mean those corporations who profit from status quo, support status quo. But what is the profit of supporting status quo for those, whom it kills? Rover for instance?



I think the switchover from ICE to electrics is going to make someone alot of money, but until it reaches some kind of critical mass and the expertise to manufacture them well, supply service and maintenance and sales, until all of this arrives in one package or another, it won't just cascade overnight onto any "normal" manufacturer.

But the instant people figure out how much cheaper electric is over ICE for their needs, and it doesn't appear weird anymore, they'll start switching over. Easy at first, pluggable diesel electrics would be nice for starters, not everyone has to do what this guy did..

Alaska ElectricGuy
So....heading into our 3rd year post peak and I'm still getting caught in traffic jams!! DieOff already!
User avatar
ReserveGrowthRulz
Permanently Banned
 
Posts: 813
Joined: Fri 30 Dec 2005, 04:00:00
Top

Re: Existing Tech Could Replace Fossil Fuels

Postby Dezakin » Thu 12 Oct 2006, 18:32:43

$this->bbcode_second_pass_quote('The_Toecutter', '')$this->bbcode_second_pass_quote('', 'S')ure no problem . If somebody is giving the new plug-in hybrid vehicles free of charge everybody is going to get one .


Of course, if we go pure electric, you don't have to include two separate drive systems. This would make the vehicles cost competitive to the conventional ICE vehicles without any subsidies.


Not with what batteries cost today to have any range... But you could do a series hybrid with a turbine powerplant. It could run on kerosene, and it would be about the size of a basketball with very low maintenance. The efficiency would be somewhat lower than gasoline engines, but given you only need it when your battery charge is low when you drive further than 10-20 miles, it wouldnt really matter. It would probably be cheaper than the batteries that would give you 300 miles of range.
User avatar
Dezakin
Heavy Crude
Heavy Crude
 
Posts: 1569
Joined: Wed 09 Feb 2005, 04:00:00
Top

Re: Existing Tech Could Replace Fossil Fuels

Postby The_Toecutter » Thu 12 Oct 2006, 21:32:05

$this->bbcode_second_pass_quote('', 'W')here do you get these figures from? My understanding was that to turn all vehicles into electric we would need to roughly double electricity production.


Yesplease pretty much sums it up in his post after yours, but here's how I look at it:

Midsize electric car or wagon with no attention to aerodynamics(eg. Nissan Altra) or small SUV(eg. RAV4) uses about .3 kWh/mile from the batteries. Sports cars, aerodynamic cars and compacts use less, pickups and large SUVs more, but .3 kWh/mile is a good average for Ford Taurus or Toyota RAV4 sized and shaped cars.

An electric car is about 75% efficient charging from an outlet, so .4 kWh/mile AC consumed. Electricity transmission from powerplant to home is about 92% efficient. So basically, .435 kWh/mile AC from the electric power plant.

The U.S. currently produces 3.7 trillion kWh of electricity a year.

The typical car is driven 12,000 miles per year in the U.S. The U.S. has roughly 200 million cars.

To replace all cars in the U.S. to electric would require about 1.04*10^12 kWh of electricity.

This is just over a 28% increase in electricity consumption.

This assumes we don't make our car designs more efficient than they are today. Adressing aerodynamics, going to LRR tires, synthetic transmission oil, ect., we could have .15 kWh/mile midsize cars and .2 kWh/mile small SUVs.

$this->bbcode_second_pass_quote('', 'I') see two problems with that. One, that coal is polluting and a carbon dioxide source, leading to climate change.


Very true.

However, even getting its electricity from a coal fired powerplant, an electric car will greatly reduce smog forming emissions over a comparable gasoline powered one and reduce GHG emissions by about 50% per mile travelled!

$this->bbcode_second_pass_quote('', 'T')wo, that we have had plenty of time to develop sustainable technology in the last two centuries, and we haven't exactly done it, have we?


Oh, we've developed sustainable technology. Plenty in fact. We just aren't USING it nearly as much as we could. We've had hemp for centuries, high speed electric rail for nearly a half century, wind electricity and electric cars have been viable and cheaper than conventional sources since the 1990s...

By themseklves, these aren't all encompassing solutions that can solve this crisis on their own. Combined, they can greatly mitigate the effects of peak oil.

The only problem is, using them over conventional sources will reduce consumer spending, reduce growth, and reduce centralized control of energy. There are many entrenched interests that do not want to see this happen, even if it means we will have a PO induced 'dieoff' if we don';t start switching to these alternatives.
The unnecessary felling of a tree, perhaps the old growth of centuries, seems to me a crime little short of murder. ~Thomas Jefferson
User avatar
The_Toecutter
Intermediate Crude
Intermediate Crude
 
Posts: 2142
Joined: Sat 18 Jun 2005, 03:00:00
Top

Re: Existing Tech Could Replace Fossil Fuels

Postby The_Toecutter » Thu 12 Oct 2006, 21:39:55

$this->bbcode_second_pass_quote('', 'A')nother factor influencing EV efficiency is the limited capacity of battery packs. To have range similar to ICE powered vehicles, the EVs need to be better at rolling, and moving through the air. A side effect is they are also more efficient, which reduces the amount of electricity needed by a significant amount.


A 300 Wh/mile EV(basically, Ford Taurus or Crown Victoria-like EV with no attention to efficiency) would need a 60 kWh pack to do 200 miles range. This is feasible, if production volume of battery packs is in high enough numbers.(AC Propulsion quotes $250/kWh for Li Ion in automotive volume, or a $15,000 pack)

200 miles range is about the lowest of crusing ranges seen on gasoline cars given a full tank, although most gas cars have around 250-400 miles range per tank.

However, I think we should address aerodynamics. Not only would doing so allow 40+ mpg gasoline cars with no other modificatrions and no engine downsizing, it would allow 150 Wh/mile electric midsize cars. The more efficient you make the car, the smaller the battery pack you can use for the same range, greatly reducing cost.

With attention to aerodynamics, there is no reason we couldn't have a $20,000 midsize electric car with 200 miles range. We just need high production volume to bring costs down...

$this->bbcode_second_pass_quote('', 'A')nd we don't build a sustainable society because its cheaper to date to build a disposable one.


Not necessarily cheaper, but it is much more profitable to build a disposable one. Economics actually favor many alternatives to oil, but government subsidies and politics attempt to influence how and where people spend their money. One example: Hobbyists have built electric cars that achieve cost parity with their gas counterparts at prices much lower than even the $2/gallon we see today. This includes battery replacement.

Our disposable society is actually very expensive. If you accounted for all of the oil subsidies, oil wars, protection of the middle east reserves, property damage caused by pollution from oil use, gas would well exceed $10/gallon in the U.S. But this expense has a lot of profit margins lined into it. It's making a few lucky people a lot of money and rapidly growing our economy. Would alternatives be in use in place of oil where applicable, we would not have near the level of consumer spending, resource consumption, and economic growth we have today. People would save so much money it's depressing...
The unnecessary felling of a tree, perhaps the old growth of centuries, seems to me a crime little short of murder. ~Thomas Jefferson
User avatar
The_Toecutter
Intermediate Crude
Intermediate Crude
 
Posts: 2142
Joined: Sat 18 Jun 2005, 03:00:00
Top

Re: Existing Tech Could Replace Fossil Fuels

Postby The_Toecutter » Thu 12 Oct 2006, 21:59:03

$this->bbcode_second_pass_quote('', 'B')ut one general question I wanted to ask. I constantly hear opinions like - it is mor profitable to produce unreliable cars etc.etc. But if electrical cars are so superior (which they are if we are to believe what is told here) why did not some non mainstream carmakers employ them as a break through solution.


Many non-mainstream car makers are in fact making such an attempt. Tesla Motors(Roadster), CommuterCars(Tango), AC Propulsion(TZero, Scion xB conversion), Universal Electric Vehicles(Spyder), and others in the U.S., in China companies like China EV Company(Happy Messenger), Thundersky(Thundersky Limousine), Jiayuan Ltd.(Sedan), in Europe companies like Greener Energy(Jester EV), Zytec(electric Elise, electric SMART), Bollore(VBE1), in Korea, companies like GEO(GEO EV)...

The problem is, it takes hundreds of millions of dollars to develop a mass market car that can meet U.S. and/or European standards due to stringent regulations lobbied by mainstream manufacturers to kill smaller competitors. These small comapnies don't have those sorts of funds. Worse, since electric cars have lower profit margins than gas ones, the time it takes to recoup development costs is greatly increased.

There is reason Tesla is starting with an $80,000 sports car. They don't have the economies of scale to do a mass production run, and they would need tom raise well over $200 million to get that sort ofproduction going, probably more like $400 million! If they are currently stuck hand building cars, they are going to be expensive no matter what components are used. Given this, their most logical choice is to aim for the upscale market.

$this->bbcode_second_pass_quote('', 'I') mean those corporations who profit from status quo, support status quo. But what is the profit of supporting status quo for those, whom it kills? Rover for instance?


That depends on the size of the company and the risks it is willing to take given today's political climate. Tesla, for instance, is taking a huge risk. Rover would have been as well, even if the demand for such a product would have been high. The risk wouldn't be in the lack of sales, but in the 6-8 years or so it would take to recoup the original development costs and pull a profit.
The unnecessary felling of a tree, perhaps the old growth of centuries, seems to me a crime little short of murder. ~Thomas Jefferson
User avatar
The_Toecutter
Intermediate Crude
Intermediate Crude
 
Posts: 2142
Joined: Sat 18 Jun 2005, 03:00:00
Top

Re: Existing Tech Could Replace Fossil Fuels

Postby The_Toecutter » Thu 12 Oct 2006, 22:08:29

$this->bbcode_second_pass_quote('', 'N')ot with what batteries cost today to have any range... But you could do a series hybrid with a turbine powerplant. It could run on kerosene, and it would be about the size of a basketball with very low maintenance. The efficiency would be somewhat lower than gasoline engines, but given you only need it when your battery charge is low when you drive further than 10-20 miles, it wouldnt really matter. It would probably be cheaper than the batteries that would give you 300 miles of range.


Relative to the amount of batteries a fleet of electric cars would use, production volume is quite low.

AC Propulsion quotes Li Ion at $250/kWh in automotive volume. UC Davis quotes NiMH at $220/kWh in automotive volume. Today? We don't have automotive volume, so Li Ion is ~$500-700/kWh and NiMH ~$1,000 kWh(although NiMH's price is more a factor of Chevron controlling and EV or HEV-sized modules. Cheap Chinese NiMH has gotten down to $300-400/kWh without automotive volume for small D-size cells).

The electric motor/inverter combo for an electric car or a hybrid will be about $3,000-5,000 of the cost in automotive size production volumes, assuming around 150 horsepower or so. Having this plus a hybrid battery pack plus all the ICE components would make a PHEV far more expensive than a pure 200-300 mile range EV if both of them are mass produced.

A midsize EV or small electric SUV EV with no special attention to aerodynamics will need about a 50-60 kWh pack for 200-250 miles range. With special attention to aerodynamics, rolling losses, and other factors, the pack size needed for that same range drops to 30-40 kWh. The 50-60 kWh pack would make a $30,000 EV feasible, while the 30-40 kWh pack, a $20,000 EV feasible.

A plug-in hybrid? At least a $5,000 purchase price premium over its gas counterpart, probably more closer to $10,000.

Given the choice between a $25,000 PHEV Prius a hypothetical $20,000 electric Prius with 200 miles range, or the $20,000 gas Prius as we know it today, I'd take the electric...
The unnecessary felling of a tree, perhaps the old growth of centuries, seems to me a crime little short of murder. ~Thomas Jefferson
User avatar
The_Toecutter
Intermediate Crude
Intermediate Crude
 
Posts: 2142
Joined: Sat 18 Jun 2005, 03:00:00
Top

Re: Existing Tech Could Replace Fossil Fuels

Postby oilfreeandhappy » Sat 14 Oct 2006, 01:37:59

The problem isn't just the power needed to operate electric cars, it's also the need to maintain roads, bridges, and other infrastructure. The personal car is unsustainable in any form, especially on a world-wide basis. The energy needs are simply too great.

A large number of the trucks on the road are there because of roads, bridges, etc. Every time an interchange or road is built or repaired, tremendous amounts of fossil fuels are burned, not just in the manufacture and extraction of steel, cement, gravel, etc., but also in hauling dirt, cement, steel, gravel, etc.
Earth_Wind_and_Solar
User avatar
oilfreeandhappy
Lignite
Lignite
 
Posts: 318
Joined: Sun 29 Jan 2006, 04:00:00
Location: Colorado Springs, CO

Re: Existing Tech Could Replace Fossil Fuels

Postby The_Toecutter » Sat 14 Oct 2006, 02:59:39

$this->bbcode_second_pass_quote('', 'T')he problem isn't just the power needed to operate electric cars, it's also the need to maintain roads, bridges, and other infrastructure. The personal car is unsustainable in any form, especially on a world-wide basis. The energy needs are simply too great.


a) Less than 1% of the oil we use is to pave roads. Around 40-45% of the oil we use is to fuel gasoline powered internal combustion engined automobiles.

b) You'd be surprised, but if you do a little research, on a per mile per person basis, an electric car will use about as much energy for propulsion as electric mass transit. Mind you, I am of the opinion mass transit has less of an impact on the environment and is by far more logical a transportation choice than a personal automobile.

I understand that cars themselves are an environmental disaster and having 600 million automobiles in the world is the height of stupidity, but the automobile can potentially have a place in a sustainable future. It depends on how we allocate our resources and what our priorities are. Will our priorities be maximized profit for a few people and government control over our lives, or will the priority rest in the well being of the general population and freedom for the individual person?

$this->bbcode_second_pass_quote('', 'A') large number of the trucks on the road are there because of roads, bridges, etc. Every time an interchange or road is built or repaired, tremendous amounts of fossil fuels are burned, not just in the manufacture and extraction of steel, cement, gravel, etc., but also in hauling dirt, cement, steel, gravel, etc.


Get this: the average semi-truck causes about 10,000 times more road wear than a passenger car. Yet the trucking industry is by no means paying their fair share of road maintenance. The amount of road wear a vehicle causes varies by roughly a cube of its weight. Compare a 3,000 pound passenger car, and a 50,000 pound tractor-trailer.

Getting rid of subsidies for cars, semitrucks, and other wasteful methods of transportation and shipping goods would change a lot of habits. Some of our biggest welfare queens are in fact in the oil industry itself. If you'd account for all the personal and property damage caused by pollution from oil use, all of the subsidies to the oil industry, and all of the military budget spent on securing oil in the middle east, gasoline would cost over $10/gallon. You're simply paying for it through your taxes and by other means, while a few rich white protestant men in suits rake in a shitload of profit at your expense.
The unnecessary felling of a tree, perhaps the old growth of centuries, seems to me a crime little short of murder. ~Thomas Jefferson
User avatar
The_Toecutter
Intermediate Crude
Intermediate Crude
 
Posts: 2142
Joined: Sat 18 Jun 2005, 03:00:00
Top

Re: Existing Tech Could Replace Fossil Fuels

Postby bobcousins » Sat 14 Oct 2006, 04:58:12

$this->bbcode_second_pass_quote('oilfreeandhappy', 'T')he problem isn't just the power needed to operate electric cars, it's also the need to maintain roads, bridges, and other infrastructure. The personal car is unsustainable in any form, especially on a world-wide basis. The energy needs are simply too great.

A large number of the trucks on the road are there because of roads, bridges, etc. Every time an interchange or road is built or repaired, tremendous amounts of fossil fuels are burned, not just in the manufacture and extraction of steel, cement, gravel, etc., but also in hauling dirt, cement, steel, gravel, etc.


Thank God, a "We are all Doomed!" post, I was beginning to think I was on the wrong site. Feasible solutions? That just cannot be!

:roll:
It's all downhill from here
User avatar
bobcousins
Heavy Crude
Heavy Crude
 
Posts: 1164
Joined: Thu 14 Oct 2004, 03:00:00
Location: Left the cult
Top

Re: Existing Tech Could Replace Fossil Fuels

Postby Spartan2 » Sat 14 Oct 2006, 14:47:00

$this->bbcode_second_pass_quote('', ' ')Reducing total fossil-fuel use by 70 percent would cost $200 billion per year for 30 years


Another prediction based on a zero-growth assumption... over a period of 30 years.
Spartan2
Wood
Wood
 
Posts: 40
Joined: Wed 03 May 2006, 03:00:00
Location: Europa
Top

Re: Existing Tech Could Replace Fossil Fuels

Postby Graeme » Sat 14 Oct 2006, 23:14:30

Have you read the article? I haven't but I would find it hard to believe that they did not assume any growth. Ideally, the decline in fossil fuel use for transport and power should be offset by a complimentary increase in alternative energy and fuel utilization. Whether all countries will do this at the same rate remains to be seen and is probably doubtful. Consequently, some probably poorer countries may well fall behind unless the alternative energy they choose is affordable to individuals and governments.
Human history becomes more and more a race between education and catastrophe. H. G. Wells.
Fatih Birol's motto: leave oil before it leaves us.
User avatar
Graeme
Fusion
Fusion
 
Posts: 13258
Joined: Fri 04 Mar 2005, 04:00:00
Location: New Zealand

Re: Existing Tech Could Replace Fossil Fuels

Postby Spartan2 » Sun 15 Oct 2006, 08:25:48

I haven't read the article too but, if they don't mention what growth rate in fuel demand they used to calculate the cost of that infraestructure then I must say they should have because it makes all the difference. Even a growth rate as low as 1% will have a significant impact 30 years from now.

Maybe they expect increases in efficiency to keep zero growth.

Either way they should have mentioned it.
Spartan2
Wood
Wood
 
Posts: 40
Joined: Wed 03 May 2006, 03:00:00
Location: Europa

Re: Existing Tech Could Replace Fossil Fuels

Postby yesplease » Sun 15 Oct 2006, 11:10:03

A switch to plug-in hybrids that displaces ~80% of gasoline engine operation will cut energy consumption due to personal transportation nearly in half, due to the EV having at least double the energy efficiency of the average car today, and with the proposed use, likely three to four times the efficiency. The percentage of new vehicles on the road seems to vary by year, but given past trends, plug-in hybridization of half of all new cars sold should be able to keep up with growth in consumption of one percent per year.

Something that people seem to be ignoring, is that this article is focused on reducing carbon dioxide emissions. Plug-in hybrids are very effective at doing this because the potential fuel sources are varied and do not have to emit tons of carbon dioxide when in operation. The $200 billion per year includes the construction of new electricity generating sources that do not emit carbon dioxide, but in terms of just reducing our oil consumption, this can be done using current grid production capacity, but there wouldn't be as much of a reduction in carbon dioxide production.
User avatar
yesplease
Intermediate Crude
Intermediate Crude
 
Posts: 3765
Joined: Tue 03 Oct 2006, 03:00:00

Re: Existing Tech Could Replace Fossil Fuels

Postby Graeme » Sun 15 Oct 2006, 19:39:22

The reduction in CO2 would come about by increasing the efficiency of the existing vehicle fleet according to James Hansen, and gradually displacing 80% of the fleet with hydrids.
Human history becomes more and more a race between education and catastrophe. H. G. Wells.
Fatih Birol's motto: leave oil before it leaves us.
User avatar
Graeme
Fusion
Fusion
 
Posts: 13258
Joined: Fri 04 Mar 2005, 04:00:00
Location: New Zealand

Re: Existing Tech Could Replace Fossil Fuels

Postby sch_peakoiler » Sun 15 Oct 2006, 20:49:23

$this->bbcode_second_pass_quote('Graeme', 'T')he reduction in CO2 would come about by increasing the efficiency of the existing vehicle fleet according to James Hansen, and gradually displacing 80% of the fleet with hydrids.


How is this scenario going to address the Jevons Paradox? you increase the efficiency of your car and burn 100 gallons less per year. I take those gallons you saved and do a nice trip down the 66. And back. Depending on where I start - not really important. Important is, I will burn the fuel which you saved by increased efficiency.
There is no knowledge that is not power.
User avatar
sch_peakoiler
Tar Sands
Tar Sands
 
Posts: 555
Joined: Sun 15 Jan 2006, 04:00:00
Top

PreviousNext

Return to Energy Technology

Who is online

Users browsing this forum: No registered users and 0 guests