ben93 ([info]ben93) wrote,
@ 2005-09-08 10:31:00
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All things old are new again; A call for new steam locomotive development.

OK, I'll confess; I've been a steam locomotive fan since I was a small child. Odd, I know, to be so interested in a technology that had all but disappeared by the year I was born, but they have always had a peculiar appeal to me.

Given my bias, I will try very hard to be objective in what I am about to say;

America needs to develop a totally modern steam locomotive if we are to deal with peak oil and still have a modern transportation network.

The recent rise in the price of oil, and especially jet fuel and diesel fuel, and the acute shortages caused by hurricane Katrina have shown just how vulnerable our transportation network is to problems with the supply of this single resource. Literally everthing that you buy comes to your door only through transportation systems based on diesel fuel or jet fuel. Trains require diesel. Trucks require diesel. Ships require diesel (very few burn bunker oil any more). And though there are some short haul trucks that burn gasoline, the same shortages apply to them as well.

There are fuels available in the USA in great quantity that cannot be burned in an internal combustion engine; Coal, Peat, Scrapwood, Recycled wood fiber, Dessicated sewage, Farm waste, etc. These could be burned in domestic thermal power plants, and all of them excepting peat are so used, but electric power from a fixed site thermal power plant does not lend itself to vehicle power other than short-haul delivery and personal transport vehicles (which we need!) True. fixed site power could be used in rail transport with overhead catenary wires or with third-rails, but almost none of the nations track miles are so-equipped and the cost of an electrification effort on existing rights-of-way is staggering. Often it is close to the cost of simply building a new right-of-way.

The solution, as I see it, is to develop a thoroughly modern steam locomotive using all of the technical innovations that have appeared since steam locomotives were last built in this country; Welded boilers, modern alloys, amazingly reliable and frictionless bearings, efficient ejectors, superheaters, microprocessors, multiple unit controls, etc.

A steam locomotive built using computer simulation and CAD systems, with an additional fifty years of technology to draw upon, would not only rival diesel locomotives in efficiency, but would also be able to be designed to burn almost anything that will burn as fuel.

The additional infrastructure a steam locomotive requires; Fueling towers, Water standpipes, and Ash pits only need to be built at intervals along the right-of-way, and do not require the re-engineering of tens of thousands of miles of trackage as would electrification. To my mind this is a compelling economic argument.

If you want to read some more about modern steam locomotive efforts, especially the ACE locomotive which was proposed when last we thought about out energy future in the early 1980s, please visit The Ultimate Steam Page



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Re: the return of Steam!
(Anonymous)
2006-01-09 09:27 pm UTC (link)
I am Wes Camp. In the early days of The High Iron Co., I was Ross Rowland's chief restoration officer.

Your comments are well thought out, yet the demise of steam actually had more to do with labor issues than the relative merits of pulling power. The numbers of separate unions and the high number of staffing was unsustainable then, just as now. RR managements realized that they needed only representatives from three labor classes to maintain diesels: Machinists, electricians, and boiler makers (to do wreck repairs to car bodies).

Everybody else got canned! With the attendant masive payroll savings, along with demolishing all the related infrastructure and support systems.

Also, the diesel locomotive's superior (unlimited) starting tractive effort made them the darlings of the yardmasters. As a yardmaster it was up to them to 'clear the yard' of standing cars, to keep the receiving tracks open and available and to order the trains (as 'extras'). The dispatchers called the yardmasters to see what trains would be ready!
Yardmasters still rule the entire railroad operating scheme.

The slow/drag cpapbabilities of the MU'd diesel engines simply allowed the longer trains to be dispatched at yard shift's end and the raod power was allowed to struggle across the main. The common saying at the time of the takeover by the diesels was: that a diesel will start anything it can't RUN with, and a steamer will RUN with anything it can't start! (thus the tales of 0-8-0 pushers being dragged for miles!)

The diesel is much better suited to long periods of idle time, they are easier to repair and the fuel costs advantages of rail transport, in general, make it a hard 'sell' to return to the days of steam.

In order to successfully return to the days of steam, the mind set of the freight roads' operating departments would have to be totally re-made along the lines of superior operating utilization. You'd have to retrain all the yardmasters to think like customer service professionals.

Short, fast scheduled freights could be utilized and service would improve. But railroad managements are not eager to raise their performance expectations.

Mechanically, the biggest operational limitation is the method of supporting the firebox sheets. The current method uses thin (3/8 inch thick) sheets of firebox steel supported on 4 inch centers by radial staybolts to conatin the boiler pressure. If you could solve the firebox 'staying' problems, you might actually be able champion a return to steam.

One of the proposals that Ross was examining was the use of commercially available municipal waste (NOT sewage), extremely compacted and pressed into 'bricks', about 2 inches square, by about 8 to 10 inches long. I examined the fuel and it looked as if it would work all right with conventional screw-fed stoker systems. Supposedly the fuel had a BTU equivalancy of about 85-90% of good quality soft coal. It also had the advantage of having NO sulphur as part of the fuel compostion. It was reported to burn cleanly, and had very little ash.

It would make sense to operate commuter trains with high capacity steamers, the cost of the waste stream/synthetic fuel is free, and the higher utilization of frequent trips would make the use of steam more economical.

Another aspect that could be utilized would be the ability to use the excess boiler, steaming, capacity during train startup and accceleration. It would be possible to use an efficient, realtively compact steam turbine generator set (1,000 to 1,500 hp) to electrically power trailer, or tender, wheels using diesel traction motors. At track speeds, the steam to the electric booster would be turned off. Such a gen set could be tucked into the back of water space of the tender. The gen set could be mounted on rollout tracks for repair or replacement.

In the end of its locomotive business (1946?) Lima proposed a 4-8-6, Super Northern, with a centipeed tender riding on a 4-10-2 tender bed.

At high speeds, such a capable locomotive could have produced a horsepower in the 7500hp range!


Lots of luck.
Wes.
(703) 425 7397

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Re: the return of Steam!
(Anonymous)
2007-02-05 04:10 am UTC (link)
It is hard to contradict a man with Wes's credentials. Many of us love the "human machine" that is the classic steam locomotive. Wes uses terms that rail junkies understand, and the population at large do not. I understand them.

The steam locomotive continued to develop in places like South Africa and South America after we abandoned steam here in the USA. But, as Wes pointed out, the high labor costs vs. the diesel created a point of no return when the alternative was adopted. Ross Rowland, I'm certain, explored every option on his horizon for wringing the last pound of steam energy from the fuel, with considerations for pollution and maintenance cost. He worked very hard and very long at this, and didn't quite pull it off. I'm certain that he explored every avenue.

Earlier, two railroads (C&O and N&W), along with the steam locomotive builders and suppliers (such as Babcock and Wilcox) created a test locomotive in one case, and three road engines in the other. These were turbines fueled by coal, and they proved to be failures. As I recall, the problem was damage to the seals, the same thing that frustrated the develpment of the Wankel rotary automobile engine for so many years.

In my mind, a solution for high-traffic rail routes is electrification. Post-Bush, our society could benefit from a public works program, so a lot of people could work at stringing up the wires and poles. Whatever fuel makes sense could be burned with maximum efficiency at local power plants. Hopefully, this could be achieved with minimal damage to the planet.

Richard

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