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Can JetTrain run at the speed of 300 km/h? |
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Bombardier
JetTrain was designed at the maximum cruising speed
of 240 km/h. This is the innovative speed in the
field of non-electrified lines but currently
electric train's standard cruising speed is 300 km/h. Can the JetTrain technology enable 300 km/h
operation in non-electrified lines? |
The train can barely achieve the speed of 300 km/h
but its acceleration force at the high speed range is not
sufficient.
The next is the running curve of both trains.
The train can achieve the cruising speed of 300 km/h. The
traveling time is shortened by a few minutes.
If the stopping station is reduced to 2, the traveling time is
shortened and 300 km/h operation becomes more effective.
If more lighter passenger cars popular in Japan or
Europe are available, the train performance will be improved and
the fuel consumption will decrease.
If the weight of loaded car is set to 45 tons, 15 tons lighter
than that of the JetTrain hauling car, how much will the
performance
be improved?
The next is the simulation and the performance curve.
The red line is the train hauling 45 tons passenger cars and the
yellow is 60 tons. At the speed of 300 km/h, about twice
accelerating performance can be achieved.
The next is the traveling time table of stopping all stations.
About 9 minutes shortening is achieved. The fuel
consumption is also improved and reduced as shown below.
| Consist | fuel consumption |
| Normal | 3484.85 kg |
| light weight | 3065.23 kg |
| Consist | fuel consumption |
| Normal | 2550.91 kg |
| light weight |
2274.54 kg |
If the advanced recuperated gas turbine like Mercury 50 is
mounted, can the performance be improved more?
To simulate this, design the locomotive equipped with 4600 kW recuperated gas turbine.
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The created locomotive weighs 114.6 tons. The performance is shown
below.
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The traveling time is shortened only by about three minutes.
But the fuel consumption is remarkably reduced.
| Consist | fuel consumption |
| Mercury 50like | 2399.80 kg |
| ST40like | 3065.23 kg |
In the real world, the thermal efficiency of Mercury 50 element is 40% or more (the
total electric efficiency of generator set is 39%). The efficiency of the
engine element simulated above is calculated as 37.5%.
Such a locomotive had been proposed by RailPower as a CINGL for freight
hauling in the
past but not realized.
