The Anonymous Widower

What Are Greater Anglia Going To Do With A Problem Like The Crouch Valley Line?

This post is effectively a series of sub-posts describing the problems of the Crouch Valley Line.

Platform 1 At Wickford Station

These pictures show Platform  1 at Wickford station, where services on the Crouch Valley Line terminate.

The train in the platform is a four-car Class 321 train, which is almost exactly eighty metres long.

After Greater Anglia has renewed the fleet, the shortest electric train they will have will be a five-car Class 720 train, which is over one hundred and twenty metres long.

I don’t think one of these shiny new trains will fit into the current platform.

Electrification

These pictures show the electrification at Burnham-on-Crouch station.

And these show Southminster station.

The overhead electrification on the Shenfield to Southend Line is being renewed and this section is supposedly finished. But it does look very similar to pictures I took in 2016, that are posted in Wickford Station. As the 25 KVAC overhead electrification was installed in 1979, when the line was converted from 6.25 KVAC, I do wonder about the age of some of the gantries.

On the trip, where I took these pictures staff were still complaining about the unreliability of the wires, as they have done before.

There doesn’t appear to have been any work done on the Crouch Valley Line, although the conductor did say that the route was being closed at times for work in the near future.

I do question, whether the overhead wires on the Crouch Valley Line are of a sufficient high and modern standard to be both reliable and easy and affordable to maintain.

Can the electrification handle regenerative braking?

The Timetable

The timetable East of Shenfield is as follows.

  • Three trains per hour (tph) between Liverpool Street and Southend Victoria stations.
  • A train every forty minutes between Wickford and Southminster stations.
  • There are also some direct services between Southminster and Liverpool Street in the Peak.

Every time, I go use the line it seems, I always have a long wait at Wickford station.

Current services take thirty minutes between the two end stations with generous turnround times of about ten minutes at each end of the route.

Two trains are needed for the service, which are single-manned with a conductor checking and selling tickets appearing to float between the trains.

A New Nuclear Power Station At Bradwell

There is a possibility of building.of a new nuclear power station at Bradwell.

This Google Map shows the area.

Note.

  1. Burnham-on-Crouch is the large village on the North Bank of the River Crouch.
  2. Southminster is a couple of miles to the North of Burnham on Crouch.
  3. Bradwell is in the North-East corner of the map alongside the River Blackwater.
  4. You can just see the World War 2 airfield, which was the site of the original Bradwell nuclear power station.

If a new power station is built at Bradwell, I doubt that it will require rail freight access at Southminster, as did the original station.

Transport technology has moved on and heavy goods will surely be taken in and out by barge from the River Blackwater.

But a new station or more likely ; a cluster of small modular reactors will require transport for staff, contractors and visitors.

Although, on balance, with the growth of renewable energy, I don’t think that many more nuclear power stations will be built.

A Battery Storage Power Station At Bradwell

I also wouldn’t rule out the use of Bradwell for a battery storage power station for the electricity generated by wind farms like Gunfleet in the Northern section of the Thames Estuary.

The number and size of these wind farms will certainly increase in the coming years.

Battery storage power stations are ideal partners for wind farms, as they help turn the intermittent wind power into a constant flow of electricity.

Currently, the largest battery storage power station is a 300 MWh facility that was built in 2016,  at Buzen in Japan.

Energy storage technology is moving on fast and I would not be surprised to see 2000 MWh units by the mid-2020s.

Bradwell could be an ideal place to put a battery storage power station.

Passenger Numbers

Passenger numbers on the line over the last few years seem to have been fairly level although there appears to have been a drop in the last year or so. But this drop has happened in lots of places!

Various factors will effect the passenger numbers on the Crouch Valley Line in the future.

  • New housing along the route.
  • A large energy-based development at Bradwell will atract passengers.
  • New trains will attract passengers.
  • Will the Internet and new working practices affect passenger numbers?
  • A two tph clock-face service will attract passengers.
  • Faster and more frequent services between Liverpool Street and Wickford will make the line easier to access.

There is also the possibility of more visitors and tourists to the area. The RSPB have spent a lot of money developing Wallasea Wetlands, which is opposite Burnham-on-Crouch.

In future years, how many people will reach Wallasea, by ferry from Burnham-on-Crouch?

Adding up all these factors, I come to two conclusions.

Predicting the number of passengers will be difficult..

There will always be passengers who need this rail service.

It looks to me that Greater Anglia will have to plan for all eventualities from very low numbers of passengers to a substantial increase.

New Trains

Shenfield-Southend services and those on the Crouch Valley Line will be run using new Class 720 trains.

Bettween Liverpool Street And Southend Victoria

Currently, this service on the route is as follows.

Trains have a frequency of three tph.

  • Each train takes an hour for the journey.
  • All trains stop at the seven stations between Shenfield and Southend Victotria, Shenfield and Stratford.
  • One train in three has an extra stop at Romford.

The new trains have a faster acceleration of 1 metre per second², as opposed to the current trains which can only manage 0.55 metre per second².

This property and their modern design, probably means that the new trains, can do a complete round trip between Liverpool Street and Southend Victoria stations in under two hours.

  • The journey time between the two stations will be around fifty minutes.
  • A three tph frequency will need a fleet of six trains.
  • A four tph frequency will need a fleet of eight trains.

This service will be faster than the fastest services between Fenchurch Street and Southend Central stations.

I can certainly see a time, when the frequency between Liverpool Street and Southend Victoria stations is increased to four tph.

Passenger numbers are rising strongly at Southend Victoria station.

Southend Airport have big expansion plans and would welcome a better rail service, to and from their very convenient station.

At present times to their London termini from various airports are as follows.

  • Gatwick Airport – 31 minutes (Express)
  • Luton Airport – 28 minutes
  • Southend Airport – 53 minutes
  • Stansted Airport – 46 minutes

I think that Southend Airport times with the new trains could be about 43 minutes or less, which because of the closeness of the station to the terminal building could allow Southend Airport to claim faster times to Liverpool Street than Stansted Airport.

If the service does go to four tph, there will be a massive increase in capacity.

There will be 1145 seats in the new trains, as opposed to 927 in the current Class 321 trains.

With four tph. this would mean an increase in capacity of 40%.

I don’t think anybody in Southend will be complaining.

Between Wickford And Southminster

As I said earlier, the new longer Class 720 trains will have difficulty running the current service, as they don’t fit into Platform 1 at Wickford station.

Working the same timetable the new trains with their 544 seats will offer a 76% increase in train capacity.

Trains take thirty minutes with five intermediate stations.

Given the better acceleration and modern nature of the new trains, I wonder, if they will be able to do a round trip in an hour.

If they can do this, then it would be possible to run a two tph service on the route.

But it will be a tough ask!

That still leaves the problem of turning back the trains at Wickford.

Currently, trains between Liverpool Street and Southend Victoria going in opposite directions, pass at Wickford station.

If this could be arranged with four tph, then there would be up to fifteen minute windows, where no train was passing through Wickford station.

Suppose the Liverpool Street and Southend services passes through at XX:00, XX:15. XX:30 and XX:45.

Would it be possible for the Southminster trains to leave Wickford at XX:10 and XX:40 and arrive back at XX:05 and XX:35, thus giving five minutes for the driver to get to the other end.

As I said, it would be a tough ask!

But I suspect there is a plan to get two tph between Wickford and Southminster.

  • The track could be improved.
  • Some level crossings could be closed.
  • Operating speed could be faster.
  • Better step-free access could probably be arranged at the intermediate stations.
  • A step-free bridge could be built at Wickford.

If two tph can be achieved, then this would increase capacity on the route by 134 %.

The Passing Loop At North Fambridge Station

This Google Map shows the station and passing loop at North Fambridge station.

Measuring from the map, I estimate the following.

  • The length of the platforms are 160 metres.
  • The length of the passing loop is in around 400 metres.

I also suspect that to save money was the line was singled in the 1960s, British Rail made the passing loop as short as possible to cut costs.

The current loop can handle eight-car Class 321 trains, so it can certainly handle a five-car Class 720 trains.

I do wonder if the passing loop were to be lengthened, this would ease operation on the line.

There might even be a length, that enable a two tph service with the current four-car Class 321 trains.

Thoughts On Speed Limits

The speed limit on the line is 60 mph between Battlesbridge and North Fambridge stations and 50 mph at both ends of the line.

Summarising sections of the line, their length and speed limits give.

  • Wickford and Battlesbridge – 2 miles 38 chains = 4356 yards = 3983 metres – 50 mph
  • Battlesbridge and North Fambridge – – 5 miles 67 chains = 10274 yards = 9395 metres – 60 mph
  • North Fambridge and Southminster – 8 miles 15 chains = 14410 yards = 13177 metres – 50 mph

This gives totals of 17160 metres with a 50 mph limit and 9395 metres with a 60 mph limit.

  • At 50 mph, the train would cover the 17160 metres in 12.8 minutes
  • At 60 mph, the train would cover the 17160 metres in 10.7 minutes
  • At 75 mph, the train would cover the 17160 metres in 8.5 minutes

Increasing the speed limit to 60 mph would save two minutes.

Network Rail must have all the figures and costs, but this could be a cost-effective way to save a couple of minutes.

But it does seem if the operating speed of the line were to be increased, time saving could be achieved, that would make a two tph timetable a reality.,

Could Electrification Be Removed From The Crouch Valley Line?

If the track is going to be improved with respect to line speed, level crossings and passing loops, then there will have to be changes to the layout of the overhead electrification.

Most of the serious changes that could be carried out, would be to the East of North Fambridge station.

Would it be sensible if the Class 720 trains have a battery capability, to remove the electrification to the East of North Fambridge station?

  • 13.2 km. of single-track would have the electrification removed.
  • Some of this electrification will need replacing soon.
  • Trains could swap between power sources in North Fambridge station.
  • The batteries would be charged between Wickford and North Fambridge stations.
  • Only 16 miles in each round trip would be on batteries.

Removing some electrification would cut the cost of any works.

Conclusion

I’m sure Greater Anglia have a solution and it’s probably better than my rambling.

 

 

 

 

 

August 30, 2018 Posted by | Travel | , , , , , , | Leave a comment

Gravitricity Gets An Imperial Seal Of Approval

This article on Renewable Energy Magazine is entitled Gravitricity Technology Turns Mine Shafts into Low Cost Power Storage Systems.

This is the first paragraph.

A report by independent analysts at Imperial College London has found that Scotland-based Gravitricity’s gravity-fed energy storage system may offer a better long-term cost of energy storage than batteries or other alternatives – particularly in grid balancing and rapid frequency response services.

I am starting to believe that Gravitricity’s simple, but patented system has a future.

The Imperial report says the system has the following advantages.

  • More affordable than batteries.
  • Long life.
  • No long term degredation.

The main requirement is a shaft, which can be newly sunk or an old mine shaft.

Hopefully, reusing old mine shafts, must save costs and remove hazards from the landscape.

No-one can say the system isn’t extremely scientifically green.

I have some thoughts.

Eco-Developments

Could clever design allow a mine shaft to be both capped and turned into an energy storage system?

Perhaps then housing or other developments could be built over the top, thus converting an area unsuitable for anything into something more valuable. with built in energy storage.

More Efficient Motor-Generators

One of the keys to efficient operation of a Gravitricity system is efficient motor-generators.

These are also key to efficient regenerative braking on trains, trams and other vehicles.

So is enough research going into development of efficient motor-generators?

May 22, 2018 Posted by | World | , | 2 Comments

Report: Gravity-Based Energy Storage Could Prove Cheaper Than Batteries

The title of this post, is the same as this article on Business Green.

This is said.

Storing energy by suspending weights in disused mine shafts could be cheaper than batteries for balancing the grid, new research has found.

According to a report by analysts at Imperial College London and seen by BusinessGreen, gravity-fed energy storage systems can provide frequency response at a cost cheaper than most other storage solutions.

 

This was the conclusions of the Imperial College report.

According to the paper, gravity-fed storage providing frequency response costs $141 per kW, compared to $154 for a lithium-ion battery, $187 for lead acid batteries and $312 for flywheel.

Despite its high upfront cost, the paper argued that unlike battery-based storage systems, gravity-fed solutions have a long lifespan of more than 50 years and aren’t subject to degradation. This means they could cycle several times a day – allowing them to ‘stack revenues’ from different sources.

I always puzzle why this idea hasn’t been seriously tried before.

April 19, 2018 Posted by | World | , | Leave a comment

Huisman Weighs Into Storage

The title of this post is the same as thia article in RENews.

This is the first two paragraphs.

Edinburgh start-up Gravitricity is teaming up with Dutch lifting specialist Huisman to develop gravity-fed energy storage projects at the sites of disused mines in Scotland.

The partners plan to develop a 250kW demonstration project and test it early next year, and ultimately aim to scale up to 20MW commercial systems.

I think that this idea has a chance to be a success.

As an aside, one of my first experiences of industry was working at Enfield Rolling Mills. On one of their rolling mills, there was a ninety-three tonnes two-metre ring flywheel, which was attached to the mill. The flywheel was spun to 3000 rpm, before the copper wirebar was passed through the mill. You could see the flywheel slow, as it passed it’s energy to the mill, as it turned the wirebar into a thinner strand of copper, so that it could be drawn into electrical cable.

I think, that flywheel had an energy storage of over a MwH. Shimatovitch, the Chief Engineer reckoned that if had come of its mountings at full speed, it would have gone a mile before the houses stopped it.

March 22, 2018 Posted by | World | , , | 2 Comments

Existing EVs Could Steer Energy To 300,000 Homes

The title of this post, is the same as this article on the Utility Week web site.

This is the opening two paragraphs.

Existing electric vehicles (EVs) in the UK could contribute more than 114MW to the National Grid, enough to power over 300,000 homes.

Research commissioned by Ovo Energy suggests the figure could be achieved based on the current 19,000 Nissan Leaf EVs registered in the UK using new vehicle-to-grid (V2G) chargers.

The article goes on to discuss this in detail.

So what is vehicle-to-grid?

Wikipedia has this summary.

Vehicle-to-grid (V2G) describes a system in which plug-in electric vehicles, such as electric cars (BEV), plug-in hybrids (PHEV) or hydrogen Fuel Cell Electric Vehicles (FCEV), communicate with the power grid to sell demand response services by either returning electricity to the grid or by throttling their charging rate.

Vehicle-to-grid can be used with gridable vehicles, that is, plug-in electric vehicles (BEV and PHEV), with grid capacity. Since at any given time 95 percent of cars are parked, the batteries in electric vehicles could be used to let electricity flow from the car to the electric distribution network and back. This represents an estimated value to the utilities of up to $4,000 per year per car.

If you are thinking about buying an electric car or van, read the article and other sources. Wikipedia seems a good start.

At its simplest, it would appear that if you buy an electric vehicle, it would be prudent to fit a V2G charger in your garage or parking space.

I would expect, that the charging system is sophisticated, so that if you want to use the car, there is sufficient charge and the power hasn’t been sold back to the grid.

It will be very interesting to see how this technology develops.

March 17, 2018 Posted by | Travel | , , | Leave a comment

Would The Gravitricity Concept Work At Sea?

The North Sea and other similar places have lots of oil oil and gas platforms, that are coming to the end of their lives.

Many are being dismantled and scrapped.

But could some be used to store energy by replacing the refitting the deck with a Gravitricity energy  storage system. The massive weight would be hauled up and down from the sea bed.

It would be fed generated electricity from nearby offshore wind turbines and would store or feed the electricity to the shore as required.

Remember that some of these oil platforms have been built to support decks weighing thousands of tonnes, so would be strong enough to support the massive weight needed for a Gravitricity system.

If the height was say 500 metres and the weight was 10,000 tonnes, this would equate to just under 14 mWh.

 

February 10, 2018 Posted by | World | , | 2 Comments

Gravitricity Sets Sights On South Africa To Test Green Energy Tech

The title of this post, is the same as that of this article on ESI Africa, which describes itself as Africa’s Power Journal.

This is the first two paragraphs.

Disused mine shafts in South Africa have been identified as an ideal location to test UK-based energy start-up Gravitricity’s green energy technology.

The company announced plans to transform disused mine shafts into hi-tech green energy generation facilities through a system that uses gravity and massive weights.

This is surely a classic fit, as Africa has plenty of sun and some of the mine shafts in South Africa, like the TauTona mine are getting towards two miles deep.

A weight of 1,000 tonnes in a two mile deep shaft would store nearly nine MWh. By comparison, Dinorwig Power Station or Electric Mountain, has a capacity of 500 MWh.

But Electric Mountain was built in the 1970s, cost £425 million and took ten years to construct.

 

February 10, 2018 Posted by | World | , , , | Leave a comment

Funding Gives Weight To Idea For Storing Electricity

The title of this post, is the same as that of an article on Page 45 of today’s copy of The Times.

It talks of a company called Gravitricity, which has used the same principle as every weight-operated clock to store energy and especially energy generaed from intermittent sources like wind and solar power.

The company has just secured a £650,000 grant from Innovate UK.

In Solar Power Could Make Up “Significant Share” Of Railway’s Energy Demand, I looked at how solar farms and batteries could be used to power third-rail railway electrification.

Because of energy losses, third-rail electrification needs to be fed with power every three miles or so. This gives a problem, as connection of all these feeder points to the National Grid can be an expensive business.

A series of solar farms, wind turbines and batteries, controlled  by an intelligent control system, is an alternative way of providing the power.

In an article in the October 2017 Edition of Modern Railways, which is entitled Celling England By The Pound, Ian Walmsley says this in relation to trains running on the Uckfield Branch.

A modern EMU needs between 3 and 5 kWh per vehicle mile for this sort of service.

If I assume that trains are five cars and will be efficient enough to need only 3 kWh per vehicle mile, then to power a train along a ten mile section of track will take 150 kWh.

As the control system, only powers the track, when a train needs it, the whole system can be very efficient.

So why will Gravitricity battery ideas be ideal in this application?

Appropriate Size

By choosing the right weight and depth for the Gravitricity battery , appropriate energy storage can be provided at different points on a line.

Some parts of a journey, like accelerating away from stations will need more electricity than others, where trains are cruising along level ground.

Supposing my five-car example train is travelling at 60 mph, then to cover ten miles will take 10 minutes, with 15 kW being supplied in every minute.

If the train weighs 200 tonnes, then accelerating the train to 60 mph will need about 20 kWh.

I’m sure that a Gravitricity battery could handle this.

I would suspect that batteries of the order of 100 kWh would store enough power for the average third-rail electrified line.

A proper dynamic simulation would need to be done. I could have done this calculation in the 1960s, but I don’t have the software now!

Response Time

For safety and energy-efficiency reasons, you don’t want lines to be switched on, when there is no train present.

I suspect that if there is energy in the battery, response would be fast enough.

Energy Efficiency

The system should have a high efficiency.

How Big Would A 100 kWh Gravitricity Battery Be?

A quick calculation shows the weight would be 400 tonnes and the depth would be 100 metres.

Installing the batteries

Each battery will need a 100 metre deep hole of an appropriate diameter.

This sequence of operations would be performed.

  • A rail-mounted drilling rig would drill the hole.
  • The heavy weight of the battery would arrive by train and would be lifted into position using a rail-mounted crane.

As the equipment will generally be heavy, doing all operations from the railway will be a great help.

 

 

 

February 9, 2018 Posted by | Travel | , , , | 1 Comment

The Future Of Diesel Trains

Many feel that diesel trains have no future in the modern world, because of all those carbon and particulate emissions.

However, this article in Rail Technology News, which is entitled ScotRail To Trial Hydraulic Tech To Cut Of Carbon Emissions.

This is the first paragraph.

A new hydraulic pump could reduce Scotland’s carbon emissions by 4,000 tonnes of carbon dioxide per year.

This sounds impressive, but how is it done?

Many modern diesel muiltiple units, like the Class 170 trains, used in the ScotRail trial have hydraulic transmissions, where a pump fitted to the engine creates hydraulic power, which then drives a hydraulic motor to power the train.

But modern trains also need to have electricity in each car for lighting, air-conditioning and other services.

So typically, a hydraulic unit in each car is used to generate the electricity required.

It is this hydraulic unit, that has been replaced by a much more efficient digitally-controlled hydraulic unit.

That sort of hydraulic unit has one Scottish company’s stamp all over it; Artemis Intelligent Power, which started as a spin-off from Edinburgh University.

Artemis Intelligent Power has a page about Rail applications on their web-site.

This is the introductory paragraphs to their work.

Whilst electrification has enabled the de-carbonisation of much of the UK’s rail sector, the high capital costs in electrifying new lines means that much of Britain (and the world’s) railways will continue to rely on diesel.

In 2010, Artemis completed a study with First ScotRail which showed that between 64 and 73 percent of a train’s energy is lost through braking and transmission.

In response to this, Artemis began a number of initiatives to demonstrate the significant benefits which digital hydraulics can bring to diesel powered rail vehicles.

Two projects are detailed.

The first is the fitting of a more efficient hydraulic unit, that is described in the Rail Technology Magazine article.

Under a heading of Faster Acceleration, Reduced Consumption, there is a technical drawing with a caption of The Artemis Railcar.

This is said.

We are also working with JCB and Chiltern Railways on a project funded by the RSSB to reduce fuel consumption and improve engine performance by combining highly efficient hydraulic transmission with on board energy storage in the form of hydraulic accumulators, which store energy during braking for reuse during acceleration.

Note.

  1. The use of hydraulic accumulators to provide regenerative braking.
  2. The involvement of JCB, whose construction equipment features a lot of hydraulics.
  3. The involvement of Chiltern Railways, who like their parent company, Deutsche Bahn, have a lot of diesel-hydraulic multiple units and locomotives.

The article goes on to detail, how a test railcar will be running before the end of 2017.

This technology could have tremendous potential in the UK.

The Benefit Of Regenerative Braking

In the Wikipedia entry for Regenerative Brake, this is said.

Savings of 17%, and less wear on friction braking components, are claimed for Virgin Trains Pendolinos. The Delhi Metro reduced the amount of carbon dioxide (CO2) released into the atmosphere by around 90,000 tons by regenerating 112,500 megawatt hours of electricity through the use of regenerative braking systems between 2004 and 2007.

The entry also says that some London Underground trains save twenty percent.

It would be a large benefit to the train operating companies, if they could just have a similar saving on the cost of diesel fuel.

Could Existing Trains Be Converted?

In England, Wales and Scotland,currently there are around two hundred modern Turbostar diesel multiple units. of which thirty are used by Chiltern Railways.

Whether these can be converted, depends on the engineers and the result of the current trial, but the economic benefits of a successful conversion route could be very beneficial.

Conclusion

This is technology to watch!

 

 

December 30, 2017 Posted by | Travel | , , | 1 Comment

Hybrid Trains Proposed To Ease HS1 Capacity Issues

The title of this post is the same as an article in Issue 840 of Rail Magazine.

This is the first paragraph.

Battery-powered hybrid trains could be running on High Speed 1, offering a solution to capacity problems and giving the Marshlink route a direct connection to London.

Hitachi Rail Europe CEO Jack Commandeur is quoted as saying.

We see benefit for a battery hybrid train, that is being developed in Japan, so that is an option for the electrification problem.

I found this article on the Hitachi web site, which is entitled Energy-Saving Hybrid Propulsion System Using Storage–Battery Technology.

It is certainly an article worth reading.

This is an extract.

Hitachi has developed this hybrid propulsion system jointly with East Japan Railway Company (JR-East) for the application to next-generation diesel cars. Hitachi and JR-East have carried out the performance trials of the experimental vehicles with this hybrid propulsion system, which is known as NE@train.
Based on the successful results of this performance trial, Ki-Ha E200 type vehicle entered into the world’s first commercial operation of a train installed with the hybrid propulsion system in July 2007.

The trains are running on the Koumi Line in Japan. This is Wikipedia’s description of the line.

Some of the stations along the Koumi Line are among the highest in Japan, with Nobeyama Station reaching 1,345 meters above sea level. Because of the frequent stops and winding route the full 78.9 kilometre journey often takes as long as two and a half hours to traverse, however the journey is well known for its beautiful scenery.

The engineers, who chose this line for a trial of battery trains had obviously heard Barnes Wallis‘s quote.

There is no greater thrill in life than proving something is impossible and then showing how it can be done.

But then all good engineers love a challenge.

In some ways the attitude of the Japanese engineers is mirrored by those at Porterbrook and Northern, who decided that the Class 769 train, should be able to handle Northern’s stiffest line, which is the Buxton Line. But Buxton is nowhere near 1,345 metres above sea level.

The KiHa E200 train used on the Koumi Line are described like this in Wikipedia.

The KiHa E200 is a single-car hybrid diesel multiple unit (DMU) train type operated by East Japan Railway Company (JR East) on the Koumi Line in Japan. Three cars were delivered in April 2007, entering revenue service from 31 July 2007.

Note that the railway company involved is JR East, who have recently been involved in bidding for rail franchises in the UK and are often paired with Abellio.

The Wikipedia entry for the train has a section called Hybrid Operation Cycle. This is said.

On starting from standstill, energy stored in lithium-ion batteries is used to drive the motors, with the engine cut out. The engine then cuts in for further acceleration and running on gradients. When running down gradients, the motor acts as a generator, recharging the batteries. The engine is also used for braking.

I think that Hitachi can probably feel confident that they can build a train, that can handle the following.

  • High Speed One on 25 KVAC overhead electrification.
  • Ore to Hastings on 750 VDC third-rail electrification.
  • The Marshlink Line on stored energy in lithium-ion batteries.

The Marshlink Line has a big advantage as a trial line for battery trains.

Most proposals say that services will call at Rye, which is conveniently around halfway along the part of the route without electrification.

I believe that it would be possible to put third-rail electrification in Rye station, that could be used to charge the batteries, when the train is in the station.

The power would only be switched on, when a train is stopped in the station, which should deal with any third-rail safety problems.

Effectively, the battery-powered leg would be split into two shorter ones.

 

November 23, 2017 Posted by | Travel | , , , , , | Leave a comment