The Anonymous Widower

Climate Emission Killer: Construction Begins On World’s Biggest Liquid Air Battery

The title of this post, is the same at that of this article in the Guardian.

This is the introductory paragraph.

Construction is beginning on the world’s largest liquid air battery, which will store renewable electricity and reduce carbon emissions from fossil-fuel power plants.

These are a few points from the Guardian and other articles on other web sites, including Wikipedia.

  • The size of the battery is 250 MWh.
  • It can delivery up to 50 MW of power. which translates to five hours at full power, if the battery is full.
  • If it was already working, it would be the ninth biggest battery of all types, except for pumped storage, in the world.
  • It will be built at Trafford Energy Park near to Carrington power station.
  • It will be double the size of the largest chemical battery, which was built by Tesla in South Australia.
  • It is being built by a company call Carlton Highview Storage, which is a joint venture between Carlton Power and Highview Power.
  • It should start commercial operation in 2022.
  • The installation of the battery is an £85million project.
  • The Government have chipped in with a £10million grant.

Some reports say, this could be one of four of Highview Power’s 250 MWh CRYObatteries to be developed by the joint venture.

I will add some observations of my own.

Carrington Power Station

This Google Map shows the site of Carrington Power station.

Note.

  1. Flixton station is in the North-East corner of the map.
  2. Irlam station is on the Western edge of the map.
  3. South of the railway between the two stations, there is a large industrial site, that sits in a bend in the River Mersey.

This second Google Map shows an enlargement of the site.

Note.

  1. Carrington power station in the middle of the site.
  2. Large amounts of brownfield land.
  3. The Manchester Ship Canal passing to the West of the site.

Wikipedia says this about the design of Carrington power station.

The station is a Combined-Cycle Power Plant (CCPP), using natural gas to generate 884MW of electricity. The CCPP uses both a gas and a steam turbine together, to produce up to 50 percent more electricity from the same fuel than a traditional simple-cycle plant. The waste heat from the gas turbine is routed to the nearby steam turbine, which generates additional power. Carrington consists of two CCPP KA26-1 units. At operating design conditions, each CCPP unit generates 442.3 MW net output. The station generates enough power to meet the electricity needs of one million homes in the UK and began commercial operation on 18 September 2016.

Wikipedia also says the following.

  • The plant has an efficiency of 58%. Is that good for this type of gas-fired Combined Cycle Gas Turbine power station? 64% seems to be about the best but Carrington is better than the about 50% possible with a conventional gas turbine plant.
  • Much of the heavy equipment for the power station was brought by barge along the Manchester Ship Canal.
  • The station is also a combined heat and power plant, capable of providing nearby businesses with steam, if they require a supply. This could be useful to a Highview Power CRYObattery, as a low-grade heat-source is needed to recovery the stored energy by warming the liquid air.

Given the following.

  • There is space available near to the power station.
  • A 250 MWh CRYObattery would probably fit in a size smaller than two football pitches.
  • Carlton have permission to build another CCGT at the site.
  • Carrington has a very good electrical connection to the grid, as nearly all power stations do.
  • Heavy components can be brought in by barge on the canal.

, it would appear that the area would be a good place to site the first gr-scale CRYObattery.

Conclusion

I think siting the first grid-scale CRYObattery close to Carrington power station at the Trafford Energy Park, fits together well and I could see more CRYObatteries being installed in the following types of location.

  • At existing power stations.
  • On the sites of demolished power stations, that still have good grid connections.
  • Where interconnectors and power from offshore wind connects to the grid.

I wouldn’t be surprised to see Drax Group install a system at one of their sites, as a CRYObattery could help cut their carbon-emissions.

 

 

 

 

 

June 18, 2020 Posted by | Energy Storage | , , , , | 1 Comment

Colne – Skipton Reopening Moves Closer

The title of this post, is the same as that of this article on the Railway Gazette.

This is the introductory paragraph.

Rail minister Chris Heaton-Harris has confirmed that investigations have been commissioned into the proposed reinstatement of the 19·3 km Colne – Skipton ‘missing link’ connecting east Lancashire and west Yorkshire.

Investigations will look into.

  • Capital costs
  • Passenger demand forecasts
  • Service options.
  • Gauge enhancement measures necessary to increase rail freight capacity on TransPennine routes including between Accrington and Todmorden stations.
  • Proposals for a rail freight terminal on the site of the demolished Huncoat power station near Accrington.

This sounds more than a simple proposal to reopen the route between Skipton and Colne stations.

These are a few of my thoughts.

The Rail Route Between Preston And Skipton

The rail route between Preston on the West Coast Main Line and Skipton can be summarised as follows.

  • Preston and Rose Grove via Huncoat – double-track – electrification at Preston
  • Rose Grove and Colne – single-track
  • Colne and Skipton – to be reinstated – electrification at Skipton

Colne and Skipton might not be the easiest route to reinstate, as a dual carriageway has been built across the route to the North of Colne station.

Could Colne And Skipton Be Double-Track All The Way?

Consider.

  • The new section between Skipton and Colne could be built with single or double tracks.
  • The section between Rose Grove and Colne stations was built as a double-track and singled in 1971. British Rail’s accountants strike again!
  • The single-track section includes the Bank Top Viaduct, in the centre of Burnley.
  • Trains currently take twenty-one minutes between Rose Grove and Colne stations.

This picture shows Bank Top Viaduct.

I think the viaduct could be key to whether the route is double-track all the way.

  • If the redoubling can be performed at a reasonable cost, then that will be the way to go, as it might be possible to squeeze up to three trains per hour (tph) between Skipton and Rose Grove via Colne.
  • If on the other hand, doubling is too difficult or expensive, I estimate that no more than two tph would be possible.

For both solutions, there will need to be double track or a long passing loop, between Skipton and Colne.

Could Colne And Skipton Be Electrified?

Consider.

  •  Preston is a fully-electrified station on the West Coast Main Line.
  • Skipton is a fully-electrified station with electric trains to and from Leeds.
  • Full electrification would create an electrified route between Leeds and Blackpool, Liverpool and Preston.
  • It could be a useful diversion route for electric passenger trains across the Pennines, when their are engineering works on the Huddersfield Line or due to the building of Northern Powerhouse Rail.
  • Electrification of the route, would allow electric haulage of freight trains to and from the proposed Huncoat Rail Freight Terminal.
  • Electrification of the Calder Valley Line between Preston and Leeds is always being proposed.
  • Electrication of Bank Top Viaduct could be tricky!

It should also be noted that this article on Rail Magazine was published on May 12th, 2020 and is entitled Electrification Key to Decarbonisation – Government. Views in Government about electrification have changed, so this might affect the decision to electrify the route.

The power is already there at both ends and electrification systems with low visual intrusion could be used.

On the other hand, some might consider electrification of the route inappropriate.

Could Colne And Skipton Be Partially Electrified?

Consider.

  • I estimate that the distance between Preston and Skipton will be 41 miles.
  • If Blackpool North station were the final destination, there would be 34 miles (2 x 17) to charge the batteries.
  • If Liverpool Lime Street station were the final destination, there would be 70 miles (2 x 35) to charge the batteries.
  • If Leeds station were the final destination, there would be 52 miles (2 x 26) to charge the batteries.
  • Manufacturers’ estimates of distances, indicate that battery electric trains could cover up to 65 miles on battery power.

As both ends of the route are electrified and trains would run extra miles under the wires, it would seem likely that a battery electric train could run between Preston and Skipton, without needing a charge en route.

Drax Group And Colne And Skipton Reinstatement

Drax power station uses Flue Gas Desulphurisation. Wikipedia says this about the process at Drax.

All six units are served by an independent wet limestone-gypsum flue gas desulphurisation (FGD) plant, which was installed between 1988 and 1996. This diverts gases from the boilers and passes them through a limestone slurry, which removes at least 90% of the sulphur dioxide (SO2). This is equivalent to removing over 250,000 tonnes of SO2 each year. The process requires 10,000 tonnes of limestone a week, sourced from Tunstead Quarry in Derbyshire. A byproduct of the process is gypsum, with 15,000 tonnes produced each week. This goes to be used in the manufacture of plasterboard. The gypsum is sold exclusively to British Gypsum, and it is transported by rail to their plant at Kirkby Thore (on the Settle-Carlisle Line).

The gypsum trains go through Skipton to access the Settle-Carlisle Line.

Drax power station is part-fuelled with biomass, which comes from all over the place including the United States via the Port of Liverpool.

It is no surprise that Drax Group are in favour of the Colne and Skipton reinstatement, as it would give them a new route between Drax and the Port of Liverpool.

This press release from Drax Group gives more details including this paragraph.

It will have a direct impact on improving our supply chain at Drax, allowing freight trains to travel much more quickly to the power station in North Yorkshire – reducing journey times from the Port of Liverpool to less than three hours, a journey which can take up to nine hours at the moment.

Trains will avoid the busy Huddersfield Line and Manchester Victoria station.

Drax’s statement would appear to be a powerful reason to reinstate Colne and Skipton.

These smart new or refurbished wagons, used by Drax to move woodchip should be much faster than the typical 20-30 mph freight speed of TransPennine routes.

This page on the Drax web site, is entitled This train isn’t like any other in the UK, and it gives more details about the wagons.

  • They were custom-designed and built in the last few years.
  • The roofs open automatically for loading.
  • A twenty-five wagon train can be loaded in 37 minutes.
  • A full train can carry between 1,700 and 1,800 tonnes of biomass.
  • Each train can unload in forty minutes.
  • They are the largest wagons on UK railways by a margin of 30 %.
  • Each wagon is nineteen metres long and can carry over seventy tonnes of biomass.
  • Approximately 14 trains per day arrive at Drax, bringing 20,000 tonnes of biomass.

I suspect to minimise journey times, Drax would like to see a fully electrified route between Preston and Skipton and a new double-track route between Colne and Skipton.

The Huncoat Rail Freight Terminal

This Google Map shows the position of the former Huncoat power station.

Note.

  1. Hapton station in the North-East corner of the map.
  2. Huncoat station in the South-West corner of the map.
  3. The East Lancashire Line running between the two stations.
  4. The M65 running across the top of the map.
  5. The A56 or Accrington bypass running North-South from the motorway junction at the top of the map.

Huncoat power station appears to have been in the South West corner of the rough-looking area, South of the M65 and the railway and West of the A56.

There is no Wikipedia entry for the demolished power station, but this page on The View From The North has some details and pictures.

It does appear to be a well connected site for a Rail Freight Terminal.

  • There could be a direct connection to the motorway network.
  • There is space for a connection with the East Lancashire Line, that would allow trains to access the interchange from both directions.
  • Trains could go West to the Port of Liverpool and the West Coast Main Line via Preston.
  • Trains could go East to Leeds and Yorkshire and on to the East Coast ports of Felixstowe, Hull, Immingham and Teesport.
  • If the East Lancashire Line were to be electrified, electric haulage could be used.

The Rail Freight Terminal could be bigger than a hundred hectares.

Gauge Enhancement On TransPennine Routes Including Between Accrington And Todmorden

Consider

  • Most freight trains passing through Hebden Bridge station  use the route via Rochdale and Todmorden to get to and from Liverpool and the West.
  • Few if any use the East Lancashire Line via Accrington.
  • Some passenger trains do take the Accrington route.
  • There are five tunnels between Accrington and the Todmorden Curve.
  • The building of the Huncoat Rail Freight Terminal, must mean that trains between the Rail Freight Terminal and Leeds and the East would need to use the Calder Valley Line as far as the Todmorden Curve. or the East Lancashire Line to Colne for the new route.

As freight trains rarely seem to use the East Lancashire Line to the East of Accrington could it be that this section of track needs gauge enhancement?

But if this gauge enhancement were to be completed, that could give two routes between Huncoat Rail Freight Terminal and the East, for the largest freight trains.

Thoughts On The Project Management

It would appear that there are a series of sub-projects to be done.

  1. Perform gauge enhancement and route improvement on the East Lancashire Line between Rose Grove and Colne. This would include any doubling of the route, if that were to be done.
  2. Start building the link between Skipton and Colne.
  3. Start building the Huncoat Rail Freight Terminal.
  4. Finish building the link between Skipton and Colne.
  5. Start passenger and freight services between Skipton and Colne.
  6. Finish building the Huncoat Rail Freight Terminal.
  7. Perform gauge enhancement on the Calder Valley Line between Accrington and Todmorden.

My objectives would be.

  • Open the Skipton and Colne route as a TransPennine diversion, as early as possible.
  • Upgrade the East Lancashire Line between Rose Grove and Colne with minimum disruption.
  • Open the Huncoat Rail Freight Terminal as early as possible.
  • Create multiple freight routes to and from Huncoat Rail Freight Terminal.

Electrification would be a future aspiration.

Whither Drax?

Drax Gtroup and their flagship power station have a major environmental problem in that the power station is a large emitter of carbon dioxide.

They also run a lot of diesel locomotive hauled trains carrying biomass, fly ash, gypsum, limestone and other materials to and from Drax power station, which is on the Drax branch of the Pontefract Line.

  • The Pontefract Line was built to serve the coalfields in the area.
  • It runs between Leeds and Hull via Pontefract and Goole.
  • It is not electrified, but it connects to the electrification at Leeds.
  • In the East is has good connections to Cleethorpes, Goole, Grimsby, Hull and Immingham.
  • The Port of Immingham is a major port, that is used by Drax to import biomass, which is hauled to the power station by diesel locomotives.
  • The route between Drax and Immingham has been improved recently, by the addition of the North Doncaster chord.
  • High Speed Two will run alongside the Pontefract Line on its approach to Leeds.
  • Freight trains between Drax and Skipton use an electrified diversion South of Leeds via Armley, that avoids the need for freight trains to pass through Leeds station.

I can see that in a more favourable climate for electrification, that electrification of the Pontefract Line would be recommended.

Given, the environmental record of Drax, which is both good and bad, I would suspect they would like to see electrification of the Pontefract Line, as it would create a lower carbon route for biomass trains between Immingham and the power station.

A New Electrified TransPennine Route For Passengers And Freight

I sense that a grander plan might exist behind all my thoughts.

If the following routes were to be electrified.

  • Preston and Skipton
  • The Pontefract Line between Leeds and Hull.
  • Knottingley and Immingham via Thorne

Hull and Liverpool would be connected for passenger electric trains and Liverpool and Immingham would be connected for freight.

Drax could also be on an electrified branch and they could say, they were hauling all their trains using renewable electricity. Marketing and environment are always important

 

 

 

 

May 12, 2020 Posted by | Transport | , , , , , , , , , , , , | 3 Comments

Fruit And Veg Self-Sufficiency Ahead Thanks To Heat From Sewage Farms

This headline caught my eye on an article in today’s Times.

This is the introductory paragraph.

Britain will become far more self-sufficient in tomatoes, cucumbers, peppers and other produce under plans to tap heat from sewage farms and pipe it to giant greenhouses.

The idea of using waste heat to grow fruit and vegetables is not new.

The technique is used at Drax power station and at various Scottish distilleries.

Low Carbon Farming just intend to do it with heat from sewage works.

  • They have identified 41 sites in the UK.
  • The greenhouses will be larger than the O2.
  • The first two sites are in East Anglia and are being built near two of Anglian Water’s sewage works.
  • Fully developed, they could make the UK self-sufficient in tomatoes, cucumbers and peppers and for most of the year.
  • It would be a £2.67 billion investment, that would create 8,000 jobs.

Intriguingly, if they need more heat, they’ll use a fossil-fuel combined heat and power unit. The carbon dioxide produced will be fed directly to the fruit and veg, as it makes them grow faster.

Another Source Of Heat

In Exciting Renewable Energy Project for Spennymoor, I wrote about a Durham University project to use the waste heat in old coal mines to heat housing.

Could this heat be used to grow fruit and veg?

April 14, 2020 Posted by | Food, World | , , , | 1 Comment

Drax Secures £500,000 For Innovative Fuel Cell Carbon Capture Study

The title of this post, is the same as that of an article on the Drax web site, that was published in June 2019.

This is the first paragraph.

Drax Group will explore the feasibility of using molten carbonate fuel cells as a technology for capturing carbon dioxide (CO2) having secured £500,000 of funding from the UK Government.

These objectives are listed.

  • Fuel cell FEED study to assess the feasibility of building a second carbon capture pilot at Drax Power Station will help position the UK as a world leader in the fight against climate change
  • The technology used will produce power at the same time as capturing carbon dioxide from Drax’s flue gases
  • Neighbouring horticultural site will use the COto improve yields and demonstrate how businesses working together in clusters can deliver climate solutions

I am glad to see, that the \Government is supporting initiatives like this.

The Drax Paradox

I have seen strawberries in a supermarket, labelled as coming from a farm at Drax in Yorkshire.

Were they grown using carbon dioxide from the power station?

They probably weren’t labelled as organic, but can you grow organic strawberries in a carbon-dioxide-rich atmosphere and label them as Organic?

Conclusion

I don’t think these and other technologies will lead to any massive revival of coal-fired power stations, as mining coal is a very disruptive and dasngerous process compared to extracting gas or growing bio-mass.

But I do think that they are needed fpr application to the following plants, that produce a lot of carbon dioxide.

  • Gas-fired power stations.
  • Biomass power stations.
  • Cement-making
  • Steel-making

The two last processes are probably the most important, as improvement in renewable energy generation, should make the first two redundant.

August 3, 2019 Posted by | World | , , , , | Leave a comment

Drax Becomes First Wood-Burning Power Plant To Capture Carbon

The title of this post is the same as that of this article on the Financial Times.

This news has been treated in a more sensationalist way by other news media and sites, but the FT gives it very straight.

Drax power station is running an experiment, that removes a tonne of carbon dioxide a day.

But that is only the start of the process and most of it is released to the atmosphere.

They are currently, looking for profitable and environmentally-friendly ways of disposal, including selling it to beer manufacturers.

Didn’t we have a carbon-dioxide shortage a few months ago?

 

February 8, 2019 Posted by | World | , , , | 1 Comment

We Need More Electricity

Everything we do, seems to need more and more electricity.

  • We are greening our transport and every electric train, car, bus and truck will need to be charged.
  • Unless it is hydrogen-powered, in which case we’ll need electricity to split water into hydrogen and oxygen.
  • Computing and the Internet needs more electricity and is leading to companies putting server farms in countries like Iceland, where there are Gigawatts of low-cost electricity.
  • We’re also using more energy hungry equipment like air-conditioning and some household appliances.
  • And then there’s industry, where some processes like metal smelting need lots of electricity.

At least developments like LED lighting and energy harvesting are helping to cut our use.

Filling The Gap

How are we going to fill our increasing energy gap?

Coal is going and rightly so!

A lot of nuclear power stations, which once built don’t create more carbon dioxide, are coming to the end of their lives. But the financial and technical problems of building new ones seem insoluble. Will the 3,200 MW Hinckley Point C ever be built?

That 3,200 MW size says a lot about the gap.

It is the sort of number that renewables, like wind and solar will scarcely make  a dent in.

Unfortunately, geography hasn’t donated us the terrain for the massive hydroelectric schemes , that are the best way to generate loe-carbon electricity.

Almost fifty years ago, I worked briefly for Frederick Snow and Partners, who were promoting a barrage of the River |Severn. I wrote about my experiences in The Severn Barrage and I still believe , that this should be done, especially as if done properly, it would also do a lot to tame the periodic flooding of the River.

The Tilbury Energy Centre

An article in The Times caught my eye last week with the headline of Tilbury Planned As Site Of UK’s Biggest Gas-Fired Power Station.

It said that RWE were going to build a massive 2,500 MW gas-fired power station.

This page on the RWE web site is entitled Tilbury Energy Centre.

This is from that page.

RWE Generation is proposing to submit plans to develop Tilbury Energy Centre at the former Tilbury B Power Station site. The development would include the potential for a Combined Cycle Gas Turbine (CCGT) power station with capacity of up to 2,500 Megawatts, 100 MW of energy storage facility and 300MW of open Cycle Gas Turbines (OCGT). The exact size and range of these technologies will be defined as the project progresses, based on an assessment of environmental impacts, as well as market and commercial factors.

The development consent application will also include a 3km gas pipeline that will connect the proposed plant to the transmission network which runs to the east of the Tilbury power station. The proposed CCGT power station would be located on the coal stock yard at the site of the former power station, but would be physically much smaller than its predecessor (a coal/biomass plant).

I will now look at the various issues.

Carbon Dioxide

But what about all that carbon dioxide that will be produced?

This is the great dilemma of a gas-powered power-station of this size.

But the advantage of natural gas over coal is that it contains several hydrogen atoms, which produce pure water under combustion. The only carbon in natural gas is the one carbon atom in methane, where it is joined to four hydrogen atoms.

Compared to burning coal, burning natural gas creates only forty percent of the carbon dioxide in creating the same amount of energy.

If you look at Drax power station, which is a 3,960 MW station, it produces a lot of carbon dioxide, even though it is now fuelled with a lot of imported biomass.

On the other hand, we could always eat the carbon dioxide.

This document on the Horticultural Development Council web site, is entitled Tomatoes: Guidelines for CO2 enrichment – A Grower Guide.

This and other technologies will be developed for the use of waste carbon-dioxide in the next couple of decades.

The great advantage of a gas-fired power station, is that, unlike coal, there are little or no impurities in the feedstock.

The Site

This Google Map shows the site, to the East of Tilbury Docks.

Note that the site is in the South East corner of the map, with its jetty for coal in the River.

These pictures show the area.

The CCGT power station would be built to the North of the derelict Tilbury B power station. I’ll repeat what RWE have said.

The proposed CCGT power station would be located on the coal stock yard at the site of the former power station, but would be physically much smaller than its predecessor (a coal/biomass plant).

Hopefully, when complete, it will improve the area behind partially Grade II* Listed Tilbury Fort.

Another development in the area is the Lower Thames Crossing, which will pass to the East of the site of the proposed power station. As this would be a tunnel could this offer advantages in the design of electricity and gas connections to the power station.

What Is A CCGT (Combined Cycle Gas Turbine) Power Station?

Combined cycle is described well but in a rather scientific manner in Wikipedia. This is the first paragraph.

In electric power generation a combined cycle is an assembly of heat engines that work in tandem from the same source of heat, converting it into mechanical energy, which in turn usually drives electrical generators. The principle is that after completing its cycle (in the first engine), the temperature of the working fluid engine is still high enough that a second subsequent heat engine may extract energy from the waste heat that the first engine produced. By combining these multiple streams of work upon a single mechanical shaft turning an electric generator, the overall net efficiency of the system may be increased by 50–60%. That is, from an overall efficiency of say 34% (in a single cycle) to possibly an overall efficiency of 51% (in a mechanical combination of two cycles) in net Carnot thermodynamic efficiency. This can be done because heat engines are only able to use a portion of the energy their fuel generates (usually less than 50%). In an ordinary (non combined cycle) heat engine the remaining heat (e.g., hot exhaust fumes) from combustion is generally wasted.

Thought of simply, it’s like putting a steam generator on the hot exhaust of your car and using the steam generated to create electricity.

The significant figures are that a single cycle has an efficiency of say 34%, whereas a combined cycle could be possibly as high as 51%.

In a section in the Wikipedia entry called Efficiency of CCGT Plants, this is said.

The most recent[when?] General Electric 9HA can attain 41.5% simple cycle efficiency and 61.4% in combined cycle mode, with a gas turbine output of 397 to 470MW and a combined output of 592MW to 701MW. Its firing temperature is between 2,600 and 2,900 °F (1,430 and 1,590 °C), its overall pressure ratio is 21.8 to 1 and is scheduled to be used by Électricité de France in Bouchain. On April 28, 2016 this plant was certified by Guinness World Records as the worlds most efficient combined cycle power plant at 62.22%. The Chubu Electric’s Nishi-ku, Nagoya power plant 405MW 7HA is expected to have 62% gross combined cycle efficiency.

There is also a section in the Wikipedia entry called Boosting Efficiency, where this is said.

The efficiency of CCGT and GT can be boosted by pre-cooling combustion air. This is practised in hot climates and also has the effect of increasing power output. This is achieved by evaporative cooling of water using a moist matrix placed in front of the turbine, or by using Ice storage air conditioning. The latter has the advantage of greater improvements due to the lower temperatures available. Furthermore, ice storage can be used as a means of load control or load shifting since ice can be made during periods of low power demand and, potentially in the future the anticipated high availability of other resources such as renewables during certain periods.

So is the location of the site by the Thames, important because of all that cold water.

But surely using surplus electricity to create ice, which is then used to improve the efficiency of the power produced from gas is one of those outwardly-bonkers, but elegant ideas, that has a sound scientific and economic case.

It’s not pure storage of electricity as in a battery or at Electric Mountain, but it allows spare renewable energy to be used profitably for electricity generators, consumers and the environment.

The location certainly isn’t short of space and it is close to some of the largest wind-farms in the UK in the Thames Estuary, of which the London Array alone has a capacity of 630 MW.

Wikipedia also has a section on an Integrated solar combined cycle (ISCC), where a CCGT power station is combined with a solar array.

I can’t see RWE building a new CCGT plant without using the latest technology and the highest efficiency.

Surely the higher the efficiency, the  less carbon dioxide is released for a given amount of electricity.

Building A CCGT Power Station

The power station itself is just a big building, where large pieces of machinery can be arranged and connected together to produce electricity.

To get an idea of scale of power stations, think of the original part of Tate Modern in London, which was the turbine hall of the Bankside power station, which generated 300 MW.

Turbines are getting smaller and more powerful, so I won’t speculate on the size of RWE’s proposed 2,500 MW station.

It will also only need a gas pipe in and a cable to connect the station to the grid. There is no need to use trains or trucks to deliver fuel.

Wikipedia has a section entitled Typical Size Of CCGT Plants, which says this.

For large-scale power generation, a typical set would be a 270 MW primary gas turbine coupled to a 130 MW secondary steam turbine, giving a total output of 400 MW. A typical power station might consist of between 1 and 6 such sets.

I feel that this raises interesting questions about the placement of single unit CCGT power stations.

It also means that at somewhere like Tilbury, you can build the units as required in sequence, provided the services are built with the first unit.

So on a large site like Tilbury, the building process can be organised in the best way posible and we might find that the station is expanded later.

RWE say this on their web site.

The exact size and range of these technologies will be defined as the project progresses, based on an assessment of environmental impacts, as well as market and commercial factors.

That sounds like a good plan to me!

100 MW Of Energy Storage At Tilbury

RWE’s plan also includes 100 MW of energy storage, although they say market and commercial factors could change this.

Energy storage is the classic way to bridge shortages in energy, when demand rises suddenly, as cin the classic half-time drinks in the Cup inal.

In Wikipedia’s list of energy storage projects, there are some interesting developments.

The Hornsdale Wind Farm in Australia has the following.

  • 99 wind turbines.
  • A total generating capacity of 315 MW.

Elon Musk is building the world’s largest lithium-ion battery next door with a capacity of 129 MwH

But those energy storage projects aren’t all about lithium-ion batteries.

Several like Electric Mountain in Wales use pumped storage and others use molten salt.

Essex doesn’t have the mountains for the former and probably the geology for the latter.

But the technology gets better all the time, so who knows what technology will be used?

The intriguing idea is the one I mentioned earlier to make ice to cool the air to improve the efficiency of the CCGT power station.

What Is The Difference Between A CCGT (Combined Cycle Gas Turbine) And An OCGT (Open Cycle Gas Turbine) Power Station?

RWE have said that they will provide 300 MW of 300MW of Open Cycle Gas Turbines, so what is the difference.

This page from the MottMacdonald web site gives a useful summary.

OCGT plants are often used for the following applications:

  • Providing a peak lopping capability
  • As a back- up to wind and solar power
  • As phase 1 to generate revenue where phase 2 may be conversion to a CCGT

CCGT plants offer greater efficiency.

I’ve also read elsewhere, that OCGT plants can use a much wider range of fuel. Used cooking oil?

Conclusion

There is a lot more to this than building a 2,500 MW gas-fired power station.

RWE will be flexible and I think we could see a very different mix to the one they have proposed.

 

 

 

 

 

 

July 23, 2017 Posted by | Energy, Energy Storage | , , , | 1 Comment