Plans To Turn Czech Coal Mine Into Storage, Hydrogen And Solar Hub
The title of this post, is the same as that of this article on Power Engineering International.
This is the sub-heading.
Mine is also going to be the site of an experimental greenhouse project called Eden Silesia
This paragraph outlines Eden Silesia.
The site will also be home to an experimental greenhouse project called EDEN Silesia, managed by the Silesian University of Technology and based on the concept of the Eden Project in Cornwall, England.
It does seem that the Czechs are creating a comprehensive facility around a Gravitricity energy store.
This Gravitricity system is only a 4MW/2 MWh system, but there is also this quote from the company.
Future multi-weight systems could have a capacity of 25MWh or more.
If the concept works, this could be imitated in several countries around the world?
Entrion Wind Wins ScotWind Feasibility Deal For Its 100-Metre Depth Foundation Tech
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
Entrion Wind has been awarded a project to evaluate the feasibility of its patent-pending fully restrained platform (FRP) offshore wind foundation technology by a Scotwind developer.
Having worked on similar structures for reusable oil platforms in the 1970s, I reckon these FRP monopoles can be made to work.
The structures, I mathematically-modelled were for a company called Balaena Structures, that had been started by two Cambridge University engineering professors. The structures were about a hundred metres high and perhaps thirty metres in diameter.
They would have been built horizontally in the sort of dock, where you would build a supertanker and would have been floated into position horizontally. Water would then be let in to the cylinder and they would turn to the vertical. From that position, they would be lowered to the sea-bed by adjusting the water in the cylinder. They had a method of holding the Balaena to the seabed, which relied mainly on the weight of the structure and what they called the gum-boot principle.
Sadly, they never sold any platforms and the company folded.
Until recently, you could find the expired patents on the Internet.
There’s more on Entrion Wind’s technology on this page on their web site.
‘Czech Sphinx’ Power Plant Intended To Keep Lights On
The title of this post, is the same as that of this article on The Times.
This is the first paragraph.
The businessman known as the “Czech Sphinx” is set to expand his position in Britain’s energy market after securing subsidy contracts to build a new gas-fired power plant and battery storage project.
As I needed to find the answers to particular questions, I looked for and found the original press release on the EP Holdings web site, which is entitled EPH Will Build A New Gas-Fired Power Plant And Battery Storage Facility In The UK At A Cost Of More Than £1 billion.
These statements describe the project.
- It will be a 1700MW high efficiency H-class CCGT power project and a 299MW 2-hour battery storage project
- The power station will be built on the site of the former Eggborough coal station in East Yorkshire.
I find this to be the most significant paragraph.
The high efficiency H-class CCGT project will be the single largest flexible generation asset to be commissioned in the UK since 2012, whilst the battery project will also be one of the largest to be built in the UK to date. Given the site’s close proximity to existing National Grid infrastructure and a number of proposed CCUS and hydrogen pipeline routes, under EPUKI’s plans these projects will make a significant contribution to the UK’s energy transition and security for years to come.
This map from OpenRailwayMap, shows the relationship between the Eggborough site and the nearby Drax power station.
Note.
- The Eggborough power station site is in the South-West corner of the map and is identified by the rail loop. which was used to deliver the coal.
- The Drax power station site is in the North-East corner of the map and is similarly identified by a rail loop.
- There is a high voltage transmission line connecting the two power stations.
- As the crow flies is about eight miles between Eggborough and Drax.
This Google Map shows the Eggborough power station site.
Note.
- The remains of the eight cooling towers are visible at the North of the site.
- The large circular black area in the middle is the coal yard with its rail loop.
- It is a large site.
I have looked in detail at the cleared area in the North-West of the site and the pylons of the connection to Drax are still visible.
So it looks like there is still an electrical connection of some sort to the site.
According to Wikipedia, the original coal-fired power station had a nameplate capacity of 1960 MW, so I suspect that a modernised electricity connection to handle the maximum near 2,000 MW of the new station would be possible.
This map shows the Zero Carbon Humber pipeline layout.
Note.
- The orange line is a proposed carbon dioxide pipeline
- The black line alongside it, is a proposed hydrogen pipeline.
- Drax, Keadby and Saltend are power stations.
- Keadby and Saltend are gas-fired power stations.
- Easington gas terminal is connected to around twenty gas fields in the North Sea.
- The terminal imports natural gas from Norway using the Langeled pipeline.
- The Rough field has been converted to gas storage and can hold four days supply of natural gas for the UK.
- To the North of Hull is the Aldbrough Gas Storage site, which SSE plan to convert to hydrogen storage.
The Eggborough power station site is about eight miles to the South-West of Drax.
I don’t suspect that connecting the Eggborough site to the carbon dioxide, gas and hydrogen pipelines will not be the most challenging of tasks.
So when the press release says.
Given the site’s close proximity to existing National Grid infrastructure and a number of proposed CCUS and hydrogen pipeline routes, under EPUKI’s plans these projects will make a significant contribution to the UK’s energy transition and security for years to come.
The company is not exaggerating.
It appears that carbon dioxide, gas and hydrogen pipelines can be developed and National Grid connections can be reinstated.
Eggborough Will Not Be Alone
From the EP Holdings press release, it appears that the Eggborough power station will be fitted with carbon-capture and will be hydrogen-ready.
This will make it the second power-station in the area to be fitted out in this way, after SSE’s planned Keadby 3, which is described in this page on the SSE web site in this document, which is entitled Keadby 3 Carbon Capture Power Station.
They could also be joined by Keadby Hydrogen power station.
This would mean that zero-carbon power stations in the area could include.
- Eggborough Gas/Hydrogen – 1700 MW
- Eggborough Battery – 299 MW
- Keadby 3 Gas/Hydrogen – 910 MW
- Keadby Hydrogen – 1800 MW – According to this Equinor press release.
Note.
- The Eggborough Battery pushes the total zero-carbon capacity over 4500 MW or 4.5 GW.
- The various Dogger Bank wind farms are to have a total capacity of 8 GW within ten years.
- The various Hornsea wind farms are to have a total capacity of 5.5 GW in a few years.
I would expect that the zero-carbon power stations would make a good fist of making up the shortfall, when the wind isn’t blowing.
Drax, Keadby 1 And Keadby 2 Power Stations
Consider.
- Drax has a nameplate capacity of 3.9 GW, of which 2.6 GW is from biomass and the rest is from coal.
- Keadby 1 has a nameplate capacity of 734 MW.
- Keadby 2 has a nameplate capacity of 734 MW.
How much of this capacity will be fitted with carbon capture, to provide extra zero-carbon backup to the wind farms?
Green Hydrogen From Surplus Wind Power
At times, there will be an excess of renewable energy.
I suspect, an order for a large electrolyser will be placed soon, so that surplus renewable energy can be used to create green hydrogen.
This will be stored in the two storage facilities, that are being developed in the area; Aldbrough and Rough.
Controlling The Fleet
I am by training a Control Engineer and this fleet can be controlled to provide the electricity output required, so that the carbon-dioxide produced is minimised and the cost is at a level to the agreement of producers and users.
Conclusion
It looks like in excess of 20 GW of reliable zero-carbon energy could be available on Humberside.
I’m sure British Steel would like to by a lot of GWhs to make some green steel at Scunthorpe.
Wales’ First Floating Offshore Wind Farm Gets Marine License
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
Blue Gem Wind, a joint venture between TotalEnergies and Simply Blue Group, has secured a marine license for the 100 MW Erebus floating offshore wind project in Wales.
These are some other points from the article.
- The project will use seven next-generation 14 MW turbines.
- They will be mounted on WindFloats, which are a proven technology.
- The wind farm will provide enough renewable energy to power 93,000 homes.
- It is aimed that the project will be commissioned in 2026.
The project has a web site, which is in English and Welsh. The home page has a good visualisation of three wind turbines on their WindFloats. Underneath is this mission statement.
Independent studies have suggested there could be as much as 50GW of electricity capacity available in the Celtic Sea waters of the UK and Ireland. This renewable energy resource could play a key role in the UK meeting the 2050 Net-Zero target required to mitigate climate change. Erebus, the first floating offshore wind project in the Celtic Sea will provide new low carbon supply chain opportunities, support coastal communities and create long-term benefits for the region.
Wales will be powered by sea dragons!
Gravitricity And Czech Firm DIAMO Announce Plans To Cooperate On Full Scale Gravity Energy Store
The title of this post, is the same as that of this article on The Engineer.
This is the sub-heading.
A former coal mine in the Czech Republic could become the first full scale gravity energy store in Europe, according to UK energy storage specialist Gravitricity
This paragraph describes the project.
The agreement will see the two companies seek funding to transform the former decommissioned Darkov deep mine – which is located in the Moravian-Silesian region of the Czech Republic – into a 4MW / 2MWh energy store, capable of powering more than 16,000 homes. According to Gravitricity the system will store energy by lowering and raising a single massive weight suspended in the Darkov mine shaft. The company has also signed a memorandum with VSB Technical University of Ostrava, whose specialist mining expertise will support the implementation of the technology.
Hopefully, the finance won’t be too difficult to find, with perhaps some help from the EU.
The article also describes the potential of Gravitricity, where it says.
- There could be up 14,000 suitable mines around the world.
- The Coal Authority believes there could be a hundred suitable shafts in the UK.
It appears Gravitricity may be on its way.
Diversifying A US$200 billion Market: The Alternatives To Li-ion Batteries For Grid-Scale Energy Storage
The title of this post, is the same as that of this article on Energy Storage News.
This is the introductory paragraph.
The global need for grid-scale energy storage will rise rapidly in the coming years as the transition away from fossil fuels accelerates. Energy storage can help meet the need for reliability and resilience on the grid, but lithium-ion is not the only option, writes Oliver Warren of climate and ESG-focused investment bank and advisory group DAI Magister.
Oliver starts by saying we need to ramp up capacity.
According to the International Energy Agency (IEA), to decarbonise electricity globally the world’s energy storage capacity must increase by a factor of 40x+ by 2030, reaching a total of 700 GW, or around 25% of global electricity usage (23,000TWh per annum). For comparison, this would be like swelling the size of the UK’s land to that of the USA.
Similar to how “nobody ever gets fired for buying IBM”, lithium-ion holds a similar place in grid scale electrical storage today.
And just as IBM did in the last decades of the last century, the builders of lithium-ion will fight back.
He then lists the problems of grid-scale lithium-ion batteries.
- Shortage of cobalt.
- Toxic and polluting extraction of some much needed metals and rare earths from unstable countries.
- Lack of capacity to load follow.
- Limited lifespan.
He does suggest vehicle-to-grid can provide 7TWh of storage by 2030, but it has similar problems to lithium-ion grid scale batteries.
Finally, he covers these what he considers several viable methods of energy storage in detail.
He introduces them with this paragraph.
No single killer application or technology exists to get the job done. Diversification is key with success dependent on the wide-scale adoption of multiple grid-scale energy storage solutions.
- Energy Dome – Italy – Stylish Use of CO2
- Augwind Energy – Israel – Stores Energy As Compressed Air Underground
- Cheesecake Energy – UK – Stores Energy As Heat And Compressed Air
- Highview Power – UK – Stores Energy As Liquefied Air
- Ocean Grazer – Netherlands – Ocean Battery
- RheEnergise – UK – High Density Hydro
- Lumenion – Germany/Japan – Stores Energy As Heat
- Energy Vault – Switzerland – Raising And Lowering Of Weights
Note.
- All systems are environmentally-friendly and use readily-available materials like air, water, sea-water, steel and concrete for their systems.
- The most exotic materials used are probably in the control computers.
- Some systems use readily-available proven turbo-machinery.
- Most systems appear to be scalable.
- All systems would appear to have a working life measured in decades.
- I would expect that most well-educated teenagers could understand how these systems worked.
Only Augwind Energy and Lumenion are new to me.
He finally sums up the economics and the market potential.
Our ability to expand energy storage capacity is one of the most pressing issues that will determine whether this defining ‘transitional’ decade is a success. But we’ll need to invest wisely into the right technologies that get the greatest bang for the buck (in terms of GWh capacity and return on capital) given the limited lifespan of Li-Ion and the decarbonisation of the grid.
At a current capital cost of US$2,000 per kW quoted by the US National Renewable Energy Laboratory (NREL) for 6-hour Li-ion battery storage, the 700GW of capacity needed by 2030 equates to around a US$1.5 trillion market over the coming decade, making it worth nearly US$200 billion a year.
The Energy Storage News article is a comprehensive must read for anyone, who is considering purchasing or investing in energy storage.
I have some further thoughts.
From My Experience Would I Add Any Other Systems?
I would add the following.
- Form Energy, because its iron-air battery is well-backed financially.
- Gravitricity, because it can use disused mine shafts to store energy and the world has lots of those.
- STORE Consortium, because its 3D-printed concrete hemispheres, that store energy using pressurised sea-water can be placed within a wind farm.
I also suspect that someone will come up with an energy storage system based on tidal range.
Finance
When we started Metier Management Systems, finance to breakout from the first initial sales was a problem. We solved the problem with good financial planning and an innovative bank manager who believed us all the way.
David, was a rogue, but he was a rogue on the side of the angels. Long after Metier, he even came to my fiftieth birthday party.
David would have found a way to fund any of these systems, as they tick all the boxes of demonstrated, environmentally-friendly, safe and understandable. They are also likely to be bought by companies, governments and organisations with a high net value, a very respectable reputation and/or large amounts of money.
I also think, that just as we did with the original Artemis project management system, some of these systems can be leased to the operators.
Second-Use Of Systems
Several of these systems could be moved on to a new location, if say they were supporting an industry that failed.
That would surely help the financing of systems.
Floating Offshore Wind Could Reach Full Commercialisation By 2035, Research Says
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
Floating offshore wind could reach full commercialisation by 2035, said 60 per cent of respondents in the latest research that was done by DNV, with 25 per cent believing it will be as early as 2030.
I’ll go along with that, but as a serial disruptive innovator, I believe full commercialisation could be earlier than 2027.
It will be for these reasons.
Capacity Factor
There is reason to believe from the figures from existing floating wind turbines, that the capacity factor is very good and could be higher than those of turbines with fixed foundations.
Wikipedia says this about the world’s first commercial floating offshore windfarm; Hywind Scotland.
In its first 5 years of operation it averaged a capacity factor of 54%, sometimes in 10 meter waves.
If other floating technologies show as good capacities as this, then the technology may well find it easier to attract finance.
Design
We have only seen a couple of designs deployed; Hywind and WindFloat.
There will be plenty more to come.
This visualisation shows five D-Floaters being transported on a ship.
Note.
- D-Floaters are being developed by Bassoe Technology.
- As many floats will be manufactured, a long way from their final mooring, why not make them easy to transport.
- Other companies are developing floats that can be bolted or welded together from standard components.
I wouldn’t be surprised if one design came to dominate the market.
This might be a good thing, as it would surely speed up deployment of floating wind farms.
Construction And Installation
This video shows the construction and installation if Principle Power‘s, Windfloat prototype.
Note.
- All the construction and assembly is done in a dock with a suitable crane.
- This is much easier than doing it the assembly out at sea, as has to be done with turbines with fixed foundations.
- I suspect that with the best design of float and turbine, high rates of turbine assembly can be achieved.
- Health and Safety will prefer this type of assembly.
I suspect other floating wind turbines will be similarly assembled.
Suppose you were assembling 15 MW floating turbines at a rate of one per day, that would be a production rate of over 5 GW of turbines per year from just one dock.
Early Delivery Of Power
I suspect that to build a floating wind farm, one of the first things to be towed out would be the substation to which all the turbines will be connected.
- This could even be floating.
- I’ve seen floating sub station designs, that incorporate energy storage and hydrogen production.
Once the substation is fully-installed and tested, floating turbines could be towed out, anchored, connected to the substation and immediately start to produce electricity.
I have built a lot of cash-flow models in my time and I believe that one for say a 2 GW floating wind farm would be very friendly to proposers, investors and operators.
There’s A Lot Of Sea Out There!
And after nearly sixty years of offshore semi-submersible platforms in UK water, we now how to work in the conditions.
In ScotWind Offshore Wind Leasing Delivers Major Boost To Scotland’s Net Zero Aspirations, I said this, about the total capacity, that will be developed under the ScotWind leasing round.
- Adding up these fixed foundation wind farms gives a capacity of 9.7 GW in 3042 km² or about 3.2 MW per km².
- Adding up the floating wind farms gives a capacity of 14.6 GW in 4193 km² or about 3.5 MW per km².
Note.
- You appear to get ten percent more capacity in a given area of sea with floating wind farms.
- The energy density of floating wind farms is 3.5 MW per km².
I suspect investors will prefer the floating wind farms.
Lower Visibility
Floating wind farms will generally be further out to sea and less likely to be objected to, than installations nearer to land.
Maintenance And Updating
Floating wind farms can be towed into port for servicing and updating, which must ease the process.
Project Management
I believe that floating wind farms, are projects, that would benefit highly from good project management.
Sometimes, I wish I was still writing project management software and I am always open to offers to give my opinion and test anybody’s software in that area!
Finance
I can see that floating wind farms could offer better cash flows to investors and this will make them invest in floating wind farms at the expense of those with fixed foundations.
Conclusion
For all these reasons, but with my instinct telling me that floating wind farms could offer a better return to investors, I wouldn’t be surprised if floating wind farms came to dominate the market.
Coal Sales Could Lose Tens Of Millions For Consumers
The title of this post, is the same as that of this article on The Times.
These two paragraphs outline the story.
A huge stockpile of coal bought for emergency use in power stations this winter is due to be resold at a loss of tens of millions of pounds to consumers.
National Grid funded the procurement of hundreds of thousands of tonnes of coal as part of a deal to keep open five coal-fired units this winter. The estimated £368 million cost of the “winter contingency contracts”, which includes an undisclosed sum for the coal purchases, is being recouped via energy bills.
Note.
- None of the coal has been burned, as the weather was warmer than expected,
- It is now sitting in various places around the country.
- It will probably sell at a loss and there will be transport costs.
I will look at the mathematics of disposal.
Burning Fossil Fuels
On the Internet, I have found these figures.
- If you burn a kilogram of natural gas you create 15.5 KWh of electricity and 2.75 kilograms of carbon dioxide.
- If you burn a kilogram of coal you create 2.46 KWh of electricity and 2.38 kilograms of carbon dioxide.
This means that natural gas and coal create 0.18 and 0.97 kilograms of carbon dioxide respectively for every KWh generated.
I believe these figures say, that if we have to use a fossil fuel, gas will be much better than coal for climate change reasons.
The Size Of The Problem
We are talking about 130,000 tonnes of coal for EDF and 400,000 for Drax. Uniper’s figure is not stated. Let’s say they make the coal pile up to 600,000 tonnes.
Burning this pile will generate 1,476,000 KWh or 1.476 GWh of electricity and create 1428,000 tonnes of carbon dioxide.
Effect On Total UK Carbon Dioxide Emissions
According to government figures on the Internet in 2021 we emitted 107.5 million tonnes of carbon dioxide.
Burning all that coal in a year, would add less than 1.5 % to our carbon dioxide emissions. Perhaps we should burn it strategically over a number of years, when there are energy supply problems, as it is after all a crude form of energy storage.
What Would I Do With The Savings?
The money saved on the transport and making loss-making sales could be spent on other ways to save carbon emissions, like converting surplus wind energy into hydrogen and blending it with the gas.
I discussed the mathematics of hydrogen blending in UK – Hydrogen To Be Added To Britain’s Gas Supply By 2025.
If we put 2 % hydrogen in our natural gas, this would save nearly 2.5 million tonnes of carbon dioxide emissions in a year. This figure is much bigger than the 1428,000 tonnes of carbon dioxide, that would be created by burning all the coal.
At a level of 2 %, most appliances, boilers and industrial processes would work without change. But a good service would help.
UK – Hydrogen To Be Added To Britain’s Gas Supply By 2025
The title of this post, is the same as that of this article on Hydrogen Central.
These are the first three paragraphs.
Hydrogen to be added to Britain’s gas supply by 2025.
Hydrogen is to be pumped into Britain’s main gas pipeline by 2025 as part of a scramble to ditch fossil fuels and move to net zero.
Between 2% and 5% of the fuel flowing through the country’s transmission network will be hydrogen in two years under plans drawn up by National Gas, which owns the pipelines.
Note.
- The article says that.on a winter’s day, you’ve got seven times more energy going through the gas network than the electricity network.
- Between 2% and 5% of hydrogen, would be unlikely to mean that appliances, boilers and industrial processes would need to be changed.
- I suspect that domestic appliances and boilers would just need a good service.
- HyDeploy has shown that 20 % of hydrogen could be possible.
- The hydrogen could be added, where the natural gas enters the UK gas network.
The exercise would save a lot of carbon emissions.
How Much Electricity Would Be Needed To Create The Hydrogen?
In The Mathematics Of Blending Twenty Percent Of Hydrogen Into The UK Gas Grid, I calculated the amount of hydrogen that would be needed for 20 %, how much electricity it would need and how much carbon dioxide would not be emitted.
How Much Hydrogen Needs To Be Added?
This page on worldodometer says this about UK gas consumption.
The United Kingdom consumes 2,795,569 million cubic feet (MMcf) of natural gas per year as of the year 2017.
I will now calculate the weight of hydrogen needed to be added.
- 2,795,569 million cubic feet converts to 79161.69851 million cubic metres.
- I will round that to 79161.7 million cubic metres.
- Twenty percent is 15832.34 million cubic metres.
- A cubic metre of hydrogen weighs 0.082 Kg, which gives that in a year 1,298.25188 million kilograms will need to be added to the UK gas supply.
This is 1,298,251.88 tonnes per year, 3,556.85 tonnes per day or 148.2 tonnes per hour.
How Much Electricity Is Needed To Create This Amount Of Hydrogen?
In Can The UK Have A Capacity To Create Five GW Of Green Hydrogen?, I said the following.
Ryze Hydrogen are building the Herne Bay electrolyser.
- It will consume 23 MW of solar and wind power.
- It will produce ten tonnes of hydrogen per day.
The electrolyser will consume 552 MWh to produce ten tonnes of hydrogen, so creating one tonne of hydrogen needs 55.2 MWh of electricity.
To create 148.2 tonnes per hour of hydrogen would need 8,180.64 MW of electricity or just under 8.2 GW.
How Much Carbon Dioxide Would Be Saved?
This page on the Engineering Toolbox is entitled Combustion Of Fuels – Carbon Dioxide Emission and it gives a list of how much carbon dioxide is emitted, when a fuel is burned.
For each Kg of these fuels, the following Kg of carbon dioxide will be released on combustion.
- Methane – 2.75
- Gasoline – 3.30
- Kerosene – 3.00
- Diesel – 3.15
- Bituminous coal – 2.38
- Lignite 1.10
- Wood – 1.83
Engineering Toolbox seems a very useful web site.
I will now calculate how much carbon dioxide would be saved.
- In 2017, UK methane consumption was 79161.7 million cubic metres.
- One cubic metre of methane weighs 0.554 Kg.
- The total weight of methane used is 43,855,581.8 tonnes.
- Multiplying by 2.75 shows that 120,602,849.95 tonnes of carbon dioxide will be produced.
As twenty percent will be replaced by hydrogen, carbon dioxide emission savings will be 6,030,142.498 tonnes.
That seems a good saving, from a small country like the UK.
The UK would also reduce natural gas consumption by twenty percent or 15832.34 million cubic metres per year.
How Much Electricity Would Be Needed To Create The Hydrogen for a 5 % Blend?
I’ll now repeat the calculation for a 5 % blend,
How Much Hydrogen Needs To Be Added?
I will now calculate the weight of hydrogen needed to be added.
- UK gas consumption rounds to 79161.7 million cubic metres.
- Five percent is 3958.085 million cubic metres.
- A cubic metre of hydrogen weighs 0.082 Kg, which gives that in a year 324.56297 million kilograms will need to be added to the UK gas supply.
This is 324,563 tonnes per year, 889.21 tonnes per day or 37 tonnes per hour.
How Much Electricity Is Needed To Create This Amount Of Hydrogen?
Earlier I said this.
The electrolyser will consume 552 MWh to produce ten tonnes of hydrogen, so creating one tonne of hydrogen needs 55.2 MWh of electricity.
To create 37 tonnes per hour of hydrogen would need 2,045.16 MW of electricity or just over 2 GW.
How Much Carbon Dioxide Would Be Saved?
Earlier, I found that a Kg of methane will produce 2.75 Kg of carbon dioxide on combustion.
I will now calculate how much carbon dioxide would be saved.
- In 2017, UK methane consumption was 79161.7 million cubic metres.
- One cubic metre of methane weighs 0.554 Kg.
- The total weight of methane used is 43,855,581.8 tonnes.
- Multiplying by 2.75 shows that 120,602,849.95 tonnes of carbon dioxide will be produced.
As five percent will be replaced by hydrogen, carbon dioxide emission savings will be 6030,142.4975 tonnes.
The UK would also reduce natural gas consumption by five percent or 3958.085 million cubic metres per year.
How Much Electricity Would Be Needed To Create The Hydrogen for a 2 % Blend?
I’ll now repeat the calculation for a 2 % blend,
How Much Hydrogen Needs To Be Added?
I will now calculate the weight of hydrogen needed to be added.
- UK gas consumption rounds to 79161.7 million cubic metres.
- Two percent is 1,583.234 million cubic metres.
- A cubic metre of hydrogen weighs 0.082 Kg, which gives that in a year 129.825 million kilograms will need to be added to the UK gas supply.
This is 129,825 tonnes per year, 355.68 tonnes per day or 14.8 tonnes per hour.
How Much Electricity Is Needed To Create This Amount Of Hydrogen?
Earlier I said this.
The electrolyser will consume 552 MWh to produce ten tonnes of hydrogen, so creating one tonne of hydrogen needs 55.2 MWh of electricity.
To create 14.8 tonnes per hour of hydrogen would need 817 MW of electricity or not even a GW.
How Much Carbon Dioxide Would Be Saved?
Earlier, I found that a Kg of methane will produce 2.75 Kg of carbon dioxide on combustion.
I will now calculate how much carbon dioxide would be saved.
- In 2017, UK methane consumption was 79161.7 million cubic metres.
- One cubic metre of methane weighs 0.554 Kg.
- The total weight of methane used is 43,855,581.8 tonnes.
- Multiplying by 2.75 shows that 120,602,849.95 tonnes of carbon dioxide will be produced.
As two percent will be replaced by hydrogen, carbon dioxide emission savings will be 2,412,057 tonnes.
The UK would also reduce natural gas consumption by two percent or 1,583.234 million cubic metres per year.
Summary Of Savings And Electricity Needed
2 %
- Hydrogen To Add – 14.8 tonnes per hour
- Electricity Needed – 817 MW per year
- Carbon Dioxide Savings – 2,412,057 tonnes per year
- Natural Gas Reduction – 1,583.234 million cubic metres per year
5 %
- Hydrogen To Add – 37 tonnes per hour
- Electricity Needed – 2,045.16 MW per year
- Carbon Dioxide Savings – 6,030,142.498 tonnes per year
- Natural Gas Reduction – 3,958.085 million cubic metres per year
20 %
- Hydrogen To Add – 148.2 tonnes per hour
- Electricity Needed – 8,180.64 MW per year
- Carbon Dioxide Savings – 24,120,569.99 tonnes per year
- Natural Gas Reduction – 1,5832.34 million cubic metres per year
The Case For Pumped Hydro Storage
The Coire Glas Project
Note that Coire Glas is a pumped storage hydroelectric scheme being developed by SSE Renewables.
- It is rated at 1.5 GW.
- It can store 30 GWh of electricity.
- It is being built in the Highlands of Scotland above Loch Lochy.
- The estimated construction time will be five to six years.
- It should be operational for more than 50 years.
- There is more about the project on this page on the Coire Glas web site.
Exploratory works have started.
The Case For Pumped Hydro Storage
The title of this post, as the same as that of this page on the Coire Glas web site.
This is the sub-heading.
A study by independent researchers from Imperial College London found that investing in 4.5GW of pumped hydro storage, with 90GWh of storage could save up to £690m per year in energy system costs by 2050, as the UK transitions to a net-zero carbon emission system.
And this is the first paragraph.
The report focused on the benefits of new long-duration pumped hydro storage in Scotland, as the current most established long-duration energy storage technology. The benefit of long duration storage compared to short duration batteries is being able to continuously charge up the storage with excess renewables and also discharge power to the grid for several hours or days when wind and solar output is low.
So Coire Glas will provide 1.5GW/30GW, so where will we get the other 3 GW/60GW?
Loch Earba Pumped Hydro
In Gilkes Reveals 900MW Scottish Pumped Storage Plan, I introduced Loch Earba Pumped Hydro.
- It is rated at 900 MW
- It can store 33 GWh of electricity.
- It is being built in the Highlands of Scotland to the East of Fort William.
- The estimated construction time will be three to four years.
- It should be operational for more than 50 years.
- There is more about the project on the Earba Storage web site.
It would appear we could be edging towards the Imperial College target in lumps of about 1GW/30 GWh.
Other Schemes In Scotland
These are other proposed or planned schemes in Scotland.
Balliemeanoch Pumped Hydro
Balliemeanoch Pumped Hydro now has a web site.
The proposed Balliemeanoch pumped hydro scheme will have these characteristics.
- Output of the power station will be 1.5 GW
- Available storage could be 45 GWh.
This medium-sized station has a lot of storage.
Corrievarkie Pumped Hydro
Corrievarkie Pumped Hydro now has a web site.
The proposed Corrievarkie pumped hydro scheme will have these characteristics.
- Output of the power station will be 600 MW
- Available storage could be 14.5 GWh.
This medium-sized station has a moderate amount of storage.
Loch Kemp Pumped Hydro
I wrote about Loch Kemp Pumped Hydro in Loch Kemp Pumped Hydro, where I said this.
The proposed Loch Kemp pumped hydro scheme will have these characteristics.
- Loch Kemp will be the upper reservoir.
- Loch Ness will be the lower reservoir.
- The power station will be on the banks of Loch Ness.
- The power station will be designed to fit into the environment.
- Eight dams will be built to enlarge Loch Kemp.
- Trees will be planted.
- Output of the power station will be 300 MW
- Available storage could be 9 GWh.
The medium-sized station will have almost as much storage capacity as Electric Mountain, but that power station has an output of 1.8 GW.
Red John Pumped Hydro
I wrote about Red John Pumped Hydro in Red John Pumped Storage Hydro Project, where I said this.
I have also found a web site for the project, which is part of the ILI Group web site.
- The scheme has an output of 450 MW.
- The storage capacity is 2,800 MWh or 2.8 GWh.
- The scheme has planning consent.
- The project is budgeted to cost £550 million.
- The construction program indicates that the scheme will be completed by the end of 2025.
Not a large scheme, but every little helps.
Proposed Pumped Hydro In Scotland
I have listed these schemes.
- Balliemeanoch – 1.5GW/45 GWh
- Coire Glas – 1.5 GW/30 GWh
- Corrievarkie – 600 MW/14.5 GWh
- Loch Earba – 900 MW/33 GWh
- Loch Kemp – 300 MW/9 GWh
- Loch Na Cathrach/Red John – 450 MW/2.8 GWh
Note.
- The scheme’s name is linked to their web site.
- The two figures are output and storage capacity.
There is a total output of 5.25 GW and a total storage capacity of 134.3 GWh.
Conclusion
If all these schemes are built, Imperial’s targets of an output of 4.5 GW and a storage capacity of 90 GWh will be comfortably exceeded.
The Anonymous Widower 