The Anonymous Widower

Beeching Reversal – A New Station At Waverley In Sheffield

This is one of the Beeching Reversal projects that the Government and Network Rail are proposing to reverse some of the Beeching cuts.

In July 2019, I covered this new station in Sheffield Region Transport Plan 2019 – A New Tram-Train Route To A New Station At Waverley.

Note that to avoid confusion, I now refer to this station as Sheffield Waverley station.

This was my conclusion in the July 2019 post.

Why shouldn’t Sheffield have an advanced tram-train system to serve the Advanced Manufacturing Park?

I feel the service should be as follows.

    • It should be terminated in a loop around the Waverley area and the Advanced Manufacturing Park.
    • In the West it could terminate in Sheffield station or perhaps pass through and terminate in the West of the City.
    • The service could be run using battery electric tram-trains, similar to the Class 398 tram-trains, that will be used on the South Wales Metro.

I don’t think that the engineering will be very challenging.

I shall be adding to this post.

July 11, 2020 Posted by | Transport | , , , , , , | 2 Comments

Thoughts On The Actual Battery Size In Class 756 Trains And Class 398 Tram-Trains

A Freedom of Information Request was sent to Transport for Wales, which said.

Please confirm the battery capacity and maximum distance possible under battery power for the Tram/Train, 3 & 4 Car Flirts.

The reply was as follows.

The batteries on the new fleets will have the following capacities: –

  • Class 756 (3-car) Flirt – 480 kWh
  • Class 756 (4-car) Flirt – 600 kWh
  • Class 398 tram-trains – 128 kWh

I will now have thoughts on both vehicles separately.

Class 756 Trains

In More On Tri-Mode Stadler Flirts, I speculated about the capacity of the batteries in the tri-mode Stadler Flirts, which are now called Class 756 trains, I said this.

I wonder how much energy storage you get for the weight of a V8 diesel, as used on a bi-mode Flirt?

The V8 16 litre diesel engines are made by Deutz and from their web site, it looks like they weigh about 1.3 tonnes.

How much energy could a 1.3 tonne battery store?

The best traction batteries can probably store 0.1 kWh per kilogram. Assuming that the usable battery weight is 1.2 tonnes, then each battery module could store 120 kWh or 360 kWh if there are three of them.

I also quoted this from the July 2018 Edition of Modern Railways.

The units will be able to run for 40 miles between charging, thanks to their three large batteries.

Since I wrote More On Tri-Mode Stadler Flirts in June 2018, a lot more information on the bi-mode Stadler Class 755 Flirt has become available and they have entered service with Greater Anglia.

Four-car trains weigh around 114 tonnes, with three-car trains around a hundred. I can also calculate kinetic energies.

How Good Was My Battery Size Estimate?

These are my estimate and the actual values for the three batteries in Class 756 trains

  • My estimate for Class 756 (3- & 4-car) – 120 kWh
  • Class 756 (3-car) Flirt – 160 kWh
  • Class 756 (4-car) Flirt – 200 kWh

So have Stadler’s battery manufacturer learned how to squeeze more kWh into the same weight of battery?

In Sparking A Revolution, I talked about Hitachi’s bullish plans for battery-powered trains, in a section called Costs and Power.

In that section, I used Hitachi’s quoted figures, that predicted a five tonne battery could hold a massive 15 MWh in fifteen years time.

If Stadler can get the same energy density in a battery as Hitachi, then their battery trains will have long enough ranges for many applications.

Class 398 Tram-Trains

In Sheffield Region Transport Plan 2019 – Tram-Trains Between Sheffield And Doncaster-Sheffield Airport, I showed this map of the route the trams would take.

I also said this about the tram-trains.

The distance between Rotherham Parkgate and Doncaster is under twelve miles and has full electrification at both ends.

The Class 399 tram-trains being built with a battery capability for the South Wales Metro to be delivered in 2023, should be able to reach Doncaster.

But there are probably other good reasons to fully electrify between Doncaster and Sheffield, via Meadowhall, Rotherham Central and Rotherham Parkgate.

The major work would probably be to update Rotherham Parkgate to a through station with two platforms and a step-free footbridge.

Currently, trains take twenty-three minutes between Rotherham Central and Doncaster. This is a time, that the tram-trains would probably match.

If you adopt the normal energy consumption of between three and five kWh per vehicle mile on the section without electrification between Rotherham Parkgate and Doncaster, you get a battery size of between 108 and 180 kWh.

It looks to me, that on a quick look, a 128 kWh battery could provide a useful range for one of Stadler’s Class 398/399 tram-trains.

Class 398 Tram-Trains Between Cardiff Bay and Cardiff Queen Street Stations

The distance between these two stations is six chains over a mile,

Adding the extra bit to the flourish might make a round trip between Cardiff Queen Street and The Flourish stations perhaps four miles.

Applying the normal energy consumption of between three and five kWh per vehicle mile on the section without electrification between Cardiff Queen Street and The Flourish, would need a battery size of between 36 and 60 kWh.

Conclusion

The battery sizes seem to fit the routes well.

 

 

March 11, 2020 Posted by | Energy Storage, Transport | , , , , , , | 2 Comments

Sheffield Region Transport Plan 2019 – A New Tram-Train Route To A New Station At Waverley

Sheffield’s plans state that a medium to long term priority is to have a new station on the Sheffield-Lincoln Line.

This Google Map shows the location of Waverley between Darnall and stations.

 

Note.

  1. Darnall station is in the North-West corner of the map.
  2. Woodhouse station is in the South-East corner of the map.
  3. Waverley is a new housing area and is highlighted in red towards the North-East corner of the map.

The plans also propose that the service will be run by tram-trains and they will also serve the Advanced Manufacturing Park (AMP)

This Google Map shows AMP and Waverley in a larger scale.

Note.

  1. Waverley in the South-East corner of the map.
  2. The AMP in the North-West corner of the map.
  3. The Sheffield-Lincoln Line curving through to the South.

Most rail and tram systems are straight out-and-back layouts, but there are two very important loops  that serve a wider area under Liverpool City Centre and Heathrow Airport.

Could Waverley and the AMP be served by a surface loop from the Sheffield-Lincoln Line?

  • The loop could be single- or double-track.
  • Stops would be in appropriate places.
  • The loop could be electrified as needed with 750 VDC to the Sheffield Supertram standard.

As Sheffield is less than three miles from Waverley, the battery-electric version of Class 399 tram-trains could be used.

  • These have been ordered for the South Wales Metro,
  • They are now numbered Class 398 tram-trains.
  • They should be able to run to and from Sheffield on battery power.
  • If the loop was fully electrified, this could charge the tram-trains.

The Sheffield-Lincoln Line passes to the back of the Sheffield Supertram Depot, so I suspect, if required the tram-trains could sneak through the depot to join the main tram route through Sheffield City Centre.

But as the Sheffield Supertram expands, there must surely come a point, where a second route across the City is needed to handle increasing numbers of trams. Manchester found this a few years ago and have since built the Second City Crossing.

Sheffield already has a second route across the City and it is the rail line through Sheffield station, which will be electrified in the next few years, to allow High Speed Two trains to reach the City.

So I can see no reason, why tram-trains from Waverley and the AMP can’t terminate in Sheffield station or go across the City.

To show what the Germans get up to, here’s one of Karlruhe’s tram-trains in a platform in Karlsruhe HBf, with a double-deck TGV in an adjacent platform.

This is one of Karlsruhe’s older train trains, that are being replaced by tram-trains, which are cousins of those in Sheffield.

If the Waverley loop is built, it can be considered as a separate tram system, that connects to Sheffield station, by running as a battery-electric train.

Conclusion

Why shouldn’t Sheffield have an advanced tram-train system to serve the Advanced Manufacturing Park?

I feel the service should be as follows.

  • It should be terminated in a loop around the Waverley area and the Advanced Manufacturing Park.
  • In the West it could terminate in Sheffield station or perhaps pass through and terminate in the West of the City.
  • The service could be run using battery electric tram-trains, similar to the Class 398 tram-trains, that will be used on the South Wales Metro.

I don’t think that the engineering will be very challenging.

 

July 20, 2019 Posted by | Transport | , , , , , , | 6 Comments