Fireless locomotive

A steam locomotive storage, also fire less locomotive, is a special design of a steam locomotive that derives its motive power from superheated water.

Before the vapor storage engine is operational, the water in the boiler of the engine has to be heated from an external boiler.

Use

A steam locomotive memory can in hazardous environments, such as for example in the chemical industry or mining, used because it does no combustion takes place. For example the uses of memory steam locomotive in about a compressed air locomotive.

Because of the dependence of a steam utility steam locomotives memory are not used underground. However, over 2000 t move steam locomotives storage trailer loads. After six to eight hours, they need to be refilled. Even today, steam accumulator locomotives are used in industrial plants, which themselves generate significant amounts of process heat, such as paper, sugar and iron industry.

One last great series of 200 pieces built the Raw Meiningen early 1980s.

Construction

Driving and engine are similar to that of a normal steam engine, customary, the axis sequences B, C and rarely D. The cylinder of the vehicles are usually relatively large size to enable the locomotive, even with strongly de-energized vapor pressure can still be operated.

The boiler is a simple pressure vessel. However, it is not simply filled with steam, but steam supplied from outside the water in the boiler, which accounts for about 2/3 of the tank volume heated. Through the pressure-tight system, the water is thereby heated to approximately 180 degrees Celsius. If now consumed by driving steam, the boiler water is boiling by now. This principle Dampfspeicherloks can be used for several hours without refilling. The ratio of the extractable amount of steam based on the storage volume can be calculated quite accurately for the applicable boundary conditions.

The boiler does not require a firebox or flue pipe and is therefore compared with the boiler of a normal heated steam locomotive a very inexpensive and low-maintenance component. He is also related to its volume relatively easy, so memory steam locomotives can be equipped with relatively large-sized boilers. In addition, the boiler is equipped with thermal insulation to keep the waste heat to a minimum.

Typically, the vessel is moved in relation to the center of the vehicle slightly forward, since the rear end of the cab is located. However, to obtain a uniform weight distribution, the cylinders are arranged below the cab.

Hochdruckdampfspeicherloks

The conventional Dampfspeicherlok has two major drawbacks. First, their radius of action has been designed for severely restricted, on the other hand the ever decreasing operating pressure results in the boiler to the cylinder must be made ​​quite large to generate sufficient traction even with low vapor pressure. Accordingly, they tend to spin at high vapor pressures, because the force generated can not be brought to the rail.

1934 built the locomotive factory Floridsdorf for the gas plant Leopoldau the city of Vienna, a steam locomotive memory according to the principles of Prof. Dr. Gilli. You should be able to carry trains with a weight of 1500 tons over ramps of 17 per thousand. This was the first locomotive that worked on the high-pressure principle. In this case, the boiler was separated from the engine by a pressure reducing valve so that the pressure prevailing in the boiler pressure has been reduced, that the cylinder bar working pressure with about 14. This was until this pressure in the tank a constantly equal work pressure in the cylinders available.

Physical point of view possessed locomotives of this type over another advantage. Due to the higher memory pressure, the water temperature in the boiler is much higher than in conventional Dampfspeicherloks. The extracted steam loses its pressure reduction on temperature, but can it be fed back through a superheater ( coils, which are in the boiler). The thus-heated steam, it is called superheated steam, heat technology has better properties than wet steam, which enabled economical operation of the locomotive. By overheating the memory is subsequently rescinded additional heat, which can not be taken from the original amount of steam filled and remains in the form of water in storage.

On the production of Hochdruckdampfspeicherloks, comprises only three locomotive factories involved. Henschel in Kassel delivered five locomotives, the locomotive factory Floridsdorf 45 pieces and Krauss -Maffei of Munich three locomotives. The last Hochdruckdampfspeicherlok ever was delivered in 1973 by the locomotive factory in Wien- Floridsdorf to the OMV, Schwechat refinery.

In Germany existing steam locomotives memory

214241
de