Octopus Energy On Xlinks
Today, Octopus Energy published a web page, which is entitled Backing Cheaper, Greener Energy Globally, giving more details of the Xlinks project.
I first wrote about the tie-up between Octopus Energy and Xlinks in Xlinks Welcomes New Investor Octopus Energy In Providing Cheap Green Power To Over 7 Million Homes.
Points made in the page on the Octopus web page include.
- The project will cover over 570 square miles in Morocco with 7GW of solar and 3.5GW of wind generation alongside a 20GWh battery storage facility.
- This green energy powerhouse will be connected to the UK via 2,361 miles of HVDC subsea cables.
- The cables will be built with British steel in a new factory in Hunterton, Scotland.
- It also appears that the site of the project has been chosen to optimise energy collection.
This project appears to be excellently-thought out to bring large benefits to all stakeholders.
Could Rolls-Royce SMRs Be The Solution To Europe’s Gas Shortage?
Of all the offshore wind farms, that I’ve looked at recently, I find Magnora’s ScotWind N3 wind farm the most interesting.
I wrote about it in ScotWind N3 Offshore Wind Farm.
I said this.
In any design competition, there is usually at least one design, that is not look like any of the others.
In the successful bids for the ScotWind leases, the bid from Magnora ASA stands out.
- The company has an unusual home page on its offshore wind web site.
- This page on their web site outlines their project.
- It will be technology agnostic, with 15MW turbines and a total capacity of 500MW
- It will use floating offshore wind with a concrete floater
- It is estimated, that it will have a capacity factor of 56 %.
- The water depth will be an astonishing 106-125m
- The construction and operation will use local facilities at Stornoway and Kishorn Ports.
- The floater will have local and Scottish content.
- The project will use UK operated vessels.
- Hydrogen is mentioned.
- Consent is planned for 2026, with construction starting in 2028 and completion in 2030.
This project could serve as a model for wind farms all round the world with a 500 MW power station, hydrogen production and local involvement and construction.
I very much like the idea of a concrete floater, which contains a huge electrolyser and gas storage, that is surrounded by an armada of giant floating wind turbines.
These are my thoughts.
Floating Concrete Structures
To many, they may have appear to have all the buoyancy of a lead balloon, but semi-submersible platforms made from concrete have been used in the oil and gas industry for several decades.
Kishorn Yard in Scotland was used to build the 600,000-tonne concrete Ninian Central Platform,in 1978. The Ninian Central Platform still holds the record as the largest movable object ever created by man.
The Ninian Central Platform sits on the sea floor, but there is no reason why a semi-submersible structure can’t be used.
Electrolysers
There is no reason, why a large electrolyser, such as those made by Cummins, ITM Power or others can’t be used, but others are on the way.
- Bloom Energy are working on high temperature electrolysis, which promises to be more efficient.
- Torvex Energy are developing electrolysis technology that used sea water, rather than more expensive purified water.
High Temperature Electrolysis
High temperature electrolysis needs a heat source to work efficiently and in Westinghouse And Bloom Energy To Team Up For Pink Hydrogen, I described how Bloom Energy propose to use steam from a large nuclear power station.
Offshore Nuclear Power
I’ve never heard of offshore nuclear power, but it is not a new idea.
In 1970, a company called Offshore Power Systems was created and it is introduced in its Wikipedia entry like this.
Offshore Power Systems (OPS) was a 1970 joint venture between Westinghouse Electric Company, which constructed nuclear generating plants, and Newport News Shipbuilding and Drydock, which had recently merged with Tenneco, to create floating nuclear power plants at Jacksonville, Florida.
Westinghouse’s reactor was a 1.150 MW unit, which was typical of the time, and is very similar in size to Sizewell B.
The project was cancelled before the reactors were towed into position.
Nuclear Knowledge Has Improved
Consider.
- In the fifty years since Offshore Power Systems dabbed their toes in the water of offshore nuclear power, our knowledge of nuclear systems and engineering has improved greatly.
- The offshore oil and gas industry has also shown what works impeccably.
- The floating offshore wind industry looks like it might push the envelop further.
- There has been only one nuclear accident at Fukushima, where the sea was part of the problem and that disaster taught us a lot.
- There have been a large number of nuclear submarines built and most reached the planned end of their lives.
- Would a small modular nuclear reactor, be safer than a large nuclear power plant of several GW?
I would suggest we now have the knowledge to safely build and operate a nuclear reactor on a proven semi-submersible platform, built from non-rusting concrete.
An Offshore Wind Farm/Small Modular Reactor Combination Producing Hydrogen
Consider.
- A typical floating offshore wind farm is between one and two gigawatts.
- A Rolls-Royce small modular reactor is sized to produce nearly 0.5 GW.
- The high temperature electrolyser will need some heat to achieve an optimum working temperature.
- Spare electricity can be used to produce hydrogen.
- Hydrogen can be stored platform.
- Hydrogen can be sent ashore using existing gas pipes.
- Hydrogen could even be blended with natural gas produced offshore to create a lower-carbon fuel.
- It would also be possible to decarbonise nearby offshore infrastructure.
A balance between wind and nuclear power can be obtained, which would provide a steady output of energy.
Conclusion
There are a large numbers of possibilities, to locate a Rolls-Royce small modular reactor close to a wind farm to use high temperature electrolysis to create green hydrogen, which can be used in the UK or exported through the gas network.
News Of The Day From Rolls-Royce
This press release from Rolls-Royce is entitled Rolls-Royce Advances Hybrid-Electric Flight With New Technology To Lead The Way In Advanced Air Mobility.
This is the introductory paragraph.
Rolls-Royce is officially announcing the development of turbogenerator technology, which includes a new small engine designed for hybrid-electric applications. The system will be an on-board power source with scalable power offerings and will complement the Rolls-Royce Electrical propulsion portfolio, enabling extended range on sustainable aviation fuels and later as it comes available through hydrogen combustion.
This paragraph outlines the use of the new small engine.
Current battery technology means all-electric propulsion will enable eVTOL and fixed wing commuter aircraft for short flights in and between cities and island-hopping in locations like Norway and the Scottish Isles. By developing turbogenerator technology, that will be scaled to serve a power range between 500 kW and 1200 kW, we can open up new longer routes that our electric battery powered aircraft can also support.
There is also a video in the press release, which gives more information.
- The turbogenerator is compatible to their electric power and propulsion offering.
- The turbogenerator has a power of 500-1200 kW to serve different aircraft platforms.
- The system is modular and can be tailored to different applications.
- The turbogenerator can either power the aircraft directly or charge the batteries.
- The system can be configured to provide primary power for other applications.
- Rolls-Royce are designing all the components; the turbogenerator, the gas turbine, the generator, the power electronics, so they all fit together in a compact and lightweight solution.
- Rolls-Royce intend to manufacture all components themselves and not rely on bought-in modules.
- Every gram of weight saved is important.
I suspect that one of the keys to making this all work is a very comprehensive and clever control system.
I have a few thoughts.
Weight Is Key
Rolls-Royce emphasise weight saving in the video. Obviously, this is important with any form of flying machine.
An Example System
Let’s suppose you want an electric power system to power a railway locomotive or one of those large mining trucks.
- The locomotive or truck has an electric transmission.
- Power of 2 MW is needed.
- A battery is needed.
- Fuel will be Sustainable Aviation Fuel (SAF) or hydrogen.
A series hybrid-electric power unit will be created from available modules, which could be very fuel efficient.
What Will Rolls-Royce’s System Be Able to Power?
Although the system is aimed at the next generation of electric flying machines, these systems will be used in any application that wants an efficient zero- or low-carbon power source.
Consider.
- Some large trucks have diesel engines with a power of almost 500 kW.
- A Class 68 bi-mode locomotive has a 700 kW diesel engine.
- A Class 802 train has three 700 kW diesel engines.
- Rolls-Royce subsidiary MTU are a large supplier of diesel engines for rail, road and water.
It looks to me that Rolls-Royce have sized the system to hoover up applications and they have MTU’s experience to engineer the applications.
Class 43 Power Cars
The iconic Class 43 power cars running on UK railways are an interesting possibility for powering with Rolls-Royce’s new system.
- Despite being over forty-years old, there are over a hundred and twenty still in service.
- They were upgraded with new 1.7 MW MTU diesel engines in the early part of this century.
- Rolls-Royce is based in Derby.
- The Class 43 power cars were developed in Derby.
- Hydrogen-powered Class 43 power cars, hauling GWR Castles or ScotRail Inter7Cities would be tourist attractions.
- The Class 43 power cars need to be either decarbonised or replaced in the next few years.
Decarbonisation using Rolls-Royce’s new system would probably be more affordable.
This all sounds like a project designed in a pub in Derby, with large amounts of real ale involved.
But I wouldn’t be surprised if it happened.
Will The System Be Upgradable From Sustainable Aviation Fuel To Hydrogen?
This is an except from the introductory paragraph.
The system will be an on-board power source with scalable power offerings and will complement the Rolls-Royce Electrical propulsion portfolio, enabling extended range on sustainable aviation fuels and later as it comes available through hydrogen combustion.
This would appear that if used in aviation, it will be possible to upgrade the system from sustainable aviation fuel to hydrogen, when a suitable hydrogen supply becomes available.
But all applications could be upgraded.
A truck, like the one shown in the picture could be delivered as one running on sustainable aviation fuel and converted to hydrogen later.
Conclusion
Rolls-Royce have put together a modular system, that will have lots of applications.
Australian Mining Billionaire Touts A Green Revolution In U.S. Coal Country — With Skepticism Trailing Close Behind
The title of this post, is the same as this article on Forbes.
It is a definite must-read about Andrew ‘Twiggy’ Forrest, making one of the most difficult hydrogen pitches in the world, to coal miners in West Virginia.
Perhaps we need Mr Forrest to convince the RMT, that their views are wrong and so nineteenth century.
Gravity—Yes, Gravity—Is the Next Frontier for Batteries
The title of this post, is the same as that of this article on Popular Mechanics.
This is the first paragraph.
When the sun isn’t shining and the wind isn’t howling, suspended weights can step in to generate power.
The article goes on to explain Energy Vault and Gravitricity.
It is certainly an endorsement of the technique from one of America’s popular magazines.
Cost Of Turning Off UK Wind Farms Reached Record High In 2021
The title of this post, is the same as that of this press release from Drax.
This is the first paragraph.
The cost of turning off wind farms in the UK has reached record levels, according to a new report.
The press release makes these points.
- Investing in more long duration electricity storage, such as expanding Drax’s Cruachan pumped storage hydro plant in Scotland, would mean more excess renewable power could be stored and made available when required, cutting costs and carbon emissions.
- The cost of turning off UK wind farms to manage the electricity system rose from almost £300m during 2020 to over £500m in 2021, contributing to higher energy bills and carbon emissions, according to a new report.
- Costs increased substantially because the system relied on expensive gas power to manage periods when wind power was curtailed, as not enough electricity storage was available to prevent the excess renewable power from wind farms going to waste.
Drax give these reasons for the problems.
This happened as a result of constraints in the transmission system and a lack of long-duration storage capacity, which is needed to manage periods when renewable power generation outstrips demand.
The problem is going to get worse as we increase the amount of wind power in the UK.
Penny Small, Drax’s Group Generation Director sums everything up.
This report underlines the need for a new regulatory framework to encourage private investment in long-duration storage technologies.
The UK is a world-leader in offshore wind, but for the country’s green energy ambitions to be realised we need the right energy storage infrastructure to support this vital technology, make the system secure and reduce costs.
Drax’s plan to expand Cruachan will strengthen UK energy security, by enabling more homegrown renewable electricity to power British homes and businesses, reducing system costs and cutting carbon emissions.
A good framework has been created for wind farms and many more are being proposed and developed.
Frameworks are needed for both transmission systems and long-duration energy storage capacity.
Drax To Pilot More Pioneering New Carbon Capture Technology
The title of this post, is the same as that of this press release from Drax.
This is the first paragraph.
Renewable energy pioneer Drax has partnered with the University of Nottingham and Promethean Particles to trial a pioneering new bioenergy with carbon capture and storage (BECCS) process at its North Yorkshire power station.
Normally, carbon capture from the flue gas of a power station uses a liquid solvent, which dissolves the carbon dioxide.
However, the process that Drax are trialling, uses porous compounds called metal–organic frameworks (MOFs) to absorb the carbon dioxide.
This page on the Promethean Particles web site described how their carbon-capture works.
Traditional solvent-based carbon capture systems require a significant amount of energy to regenerate the carbon-capturing material. In power generation applications, estimates put this energy penalty at up to 35% of the power station’s output. Metal-organic frameworks (MOFs) capture carbon mainly through physical, not chemical means. This “trapping” process requires lower energy inputs to regenerate the MOFs and can therefore help achieve more energy-efficient carbon capture. By using MOF-based carbon capture, more of the power generated can go where it was intended, lowering the price of energy for consumers and CAPEX for the power generators.
Note.
- It is a physical rather than a chemical process.
- It is more energy efficient than traditional carbon-capture.
This Drax graphic from the press release, shows how this process can be incorporated into a power plant..
Note.
- The trial will last for two months and will be hosted within Drax’s BECCS incubation hub at its North Yorkshire Power Station.
- Metal Organic Frameworks are a unique class of solid sorbents offering lower operational costs and reducing potential environmental impacts.
Work to build BECCS at Drax could get underway as soon as 2024, with the creation of thousands of jobs.
Fifty years ago, I spent several months at ICI looking at the mathematics of different numbers and sizes of vessels of in a proposed chemical plant, to optimise the cost of the plant.
- I suspect a similar analysis could be applied to this process.
- It would surely be very suitable for Drax, whose main power station has four units fuelled by biomass and another fuelled by natural gas.
- Are two columns containing MOF, the optimum number?
- The calculation could involve a lot of permutations and combinations, which I’ve used to advantage for over fifty years.
I will follow this trial with interest.
Conclusion
This is another application of advanced physics and chemistry.
If Promethean Particles ever decide to go the crowdfunding route, I would look seriously at a small investment.
Equinor And Partners Consider 1 GW Offshore Wind Farm Off The Coast Of Western Norway
The title of this post, is the same as that of this press release from Equinor.
This is the first paragraph.
Equinor and its partners Petoro, TotalEnergies, Shell and ConocoPhillips in the Troll and Oseberg fields, have initiated a study and are looking into possible options for building a floating offshore wind farm in the Troll area some 65 kilometres west of Bergen, Norway.
This second paragraph describes the production and use of the electricity.
With an installed capacity of about ~1 GW and an annual production of ~4.3 TWh, with a startup in 2027, Trollvind could provide much of the electricity needed to run the offshore fields Troll and Oseberg through an onshore connection point. The Bergen area already serves several of these installations with power – and needs more input to its electricity grid. The plan is that the partnership will buy as much energy as the wind farm can produce at a price that can make the project possible.
The press release includes a map of the wind farm, the oil and gas fields and Bergen.
This is not the first time, I’ve heard of plans to use wind-generated electricity to power offshore oil and gas fields.
It could be argued that if the gas is sold to the UK or Germany, then that country is responsible for the carbon emissions.
I doubt that Vlad the Mad’s bloodstained gas is produced using a carbon-free process.
Intriguing “Frozen Air” Energy Storage In Vermont Gets Canned
The title of this post, is the same as that of this article on the Concord Monitor.
This is the first paragraph.
Alas, the company Highview Power has given up on a plan I wrote about in 2019 to develop a long-term energy storage project in northern Vermont that freezes and unfreezes air.
The author had asked Highview Power for an update and received this statement.
As a UK-based company our primary focus right now is on our Carrington project in the North of England. This will be our first commercial plant in the wider development of a 45GWh, £10 billion programme in the UK. While the Vermont project no longer remains in our current plans, we are developing a longer-term portfolio of projects in Spain, Australia, and the U.S and we look forward to pushing forward with these after we achieve our primary UK projects.
It sounds to me that the new CEO; Rupert Pearce, is simplifying the company’s operations and aiming to get the important Carrington plant working as a priority.
Nuclear-Enabled Hydrogen – How It Helps To Reach Net Zero
The title of this post, is the same as that of this article on Power Engineering.
These are the first two paragraphs.
Nuclear enabled hydrogen is zero carbon, has low cost energy input, is large scale and offers co-location synergy and energy system connectivity.
With the revival of interest in nuclear energy, interest is growing in the potential for nuclear-enabled hydrogen, otherwise sometimes known as ‘pink’ hydrogen, to meet the anticipated demand for hydrogen at scale.
The article is certainly a must-read.
Topics covered include.
- Co-location of pink hydrogen production with industrial clusters, where heat can also be provided.
- The production of hydrogen on a large scale.
- The use of high temperature electrolysis, using steam from the nuclear plant.
I particularly like the idea of combining a small modular nuclear reactor with high temperature electrolysis to generate hydrogen for local industry like a steelworks or chemical plant.
The Anonymous Widower 