Floating Solar Not Yet Up to Par To Be Brought Into Offshore Wind Tenders, Says BP’s Benelux Head Of Offshore Wind
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
System integration is what is needed for the next leap in offshore wind, however, not all technologies that can integrate with offshore wind farms have the same starting point. Floating solar still has some way to go in becoming more resilient to harsh offshore conditions. On the other hand, hydrogen is a more ready option with plenty of support from the industry, but it needs to be included and clearly defined in offshore wind tenders.
These two paragraphs describe the views of Frank Oomen, Head of Offshore Wind Benelux at BP.
This is according to Frank Oomen, Head of Offshore Wind Benelux at BP, who discussed financial and qualitative criteria in offshore wind auctions during the Offshore Energy Exhibition & Conference 2023 (OEEC 2023).
Speaking about recently joining BP from the renewables industry, Oomen pointed out that, with offshore wind becoming larger scale, it needs to move in the direction of system integration and become an integrated energy business itself.
I had a lot of my engineering education, in ICI’s world of integrated chemical plants and I believe that Frank Oomen’s views are heading in the right direction.
If we take Frank Oomen’s views to their logical conclusion, we will see the following.
- Clusters of wind farms far from land in productive wind power areas.
- A nearby electrolyser will be producing hydrogen.
- The hydrogen will be taken to the shore by pipeline or tanker.
- BP with their oil and gas heritage, have been doing this for decades.
BP might even have some redundant gas infrastructure they can repurpose.
Guardian To Use Hydrogen In Its Glass Manufacturing
The title of this post, is the same as that of this article on Glass International.
These two paragraphs introduce the application.
Ryze Hydrogen has signed a long-term deal to provide hydrogen to flat glass manufacturer, Guardian Glass
Ryze will supply hydrogen to be used in the manufacture of float glass, which is used in everything from car windscreens and windows in buildings to mirrors and furniture.
This extract from the article explains how the hydrogen is used.
It will be used as a technical gas during the float glass process.
Chris Duguid, Plant Manager from Guardian Glass, said: “We are really pleased to be starting this partnership with Ryze.
“Hydrogen is vital to our float glass production process. Hydrogen is used to create an oxygen-free environment as a blanket to avoid oxidation of the tin onto which we float molten glass.
“As this is needed 24-hours-a-day, seven-days-a-week, 365-days-a-year, it is absolutely critical that we partner with a reliable supplier, which is what we have with Ryze.”
This Wikipedia section, describes the manufacture of float glass.
I’ve never come across a use for hydrogen, where the gas is used for its physical properties and not burned for heat.
How many other applications like this, will the ready availability of hydrogen open up?
I wonder, if the next step will be to use hydrogen to heat the tin and create the actual glass, so that Guardian Glass will be able to make zero-carbon glass.
As the temperatures required are over a 1000 °C, this process could use a lot of hydrogen.
As Guardian Glass are based at Goole, I suspect that they’ll be able to get a hydrogen pipeline from the electrolyser, that SSE are building on Humberside.
SSE Comments On COP28
The title of this post is the same as that of this press release from SSE.
SSE Chief Executive, Alistair Phillips-Davies, said:
“We knew going into COP28 that the world wasn’t moving fast enough to decarbonise. The commitment to triple renewables by 2030 is welcome, as is the inclusion, for the first time, of explicit language on the need to transition away from fossil fuels.
“Codifying and securing international endorsement for ambitions like these is very welcome; however, the challenge now is to deliver the tangible actions needed to make them a reality.
“In the power sector, this means speeding up policy and decision-making so that it is easier to invest and build the infrastructure we need to actually deliver net zero, from offshore wind farms to electricity grids and flexible power plants.
“At COP28 there was no shortage of businesses willing to invest but there was a common frustration at the pace of progress on the ground, and this is something we need to address for all our sakes.”
I would agree with what he said.
- Especially about speeding up policy and decision-making and delivering more electricity grids.
- The last paragraph probably applies to a lot of countries.
Surprisingly, energy storage is not mentioned.
Could that be because SSE are going down the route, where hydrogen is created and that is either used in gas-guzzling industries to reduce their carbon-emissions or stored until needed?
SSE Thermal Acquires 50% Stake In H2NorthEast Hydrogen Project
The title of this post is the same as that of this press release from SSE Thermal.
These are the first three introductory paragraphs.
SSE Thermal has become joint owner of a blue hydrogen project in Teesside which is set to play a major role in supporting a reliable decarbonised power system by 2035 and accelerating industrial decarbonisation.
The partnership with Kellas Midstream will see the companies jointly develop H2NorthEast, a hydrogen production facility with carbon capture and storage that could help to kickstart a hydrogen economy in the Tees Valley. The agreement is for an initial consideration of <£10m to Kellas Midstream with further contingent consideration due should the project reach a financial investment decision.
In its first phase, H2NorthEast could deliver up to 355MW of blue hydrogen production capacity from 2028 with plans to scale up to more than 1GW. Offtakers would include heavy industry and power generation, either through blending into existing assets or in new hydrogen-fired plants.
Note.
- Production of 355 MW of hydrogen could start in 2028.
- Several existing processes have been converted from gas-firing to hydrogen-firing or a blend of natural gas and hydrogen firing. See Lime Kiln Fuelled By Hydrogen Shown To Be Viable.
- Teesside has quite a few industries, like steel and chemicals that theoretically could be converted to hydrogen or a hydrogen blend.
I have some thoughts.
Carbon Capture And Storage
This paragraph in the press release talks about the carbon capture and storage.
With an anticipated minimum carbon capture rate of 97%, H2NorthEast meets both UK and EU low-carbon standards. Specifically, the hydrogen produced via H2NorthEast would be fully compliant with both the UK’s Low Carbon Hydrogen Standard and is expected to be aligned with the EU Taxonomy for sustainable activities.
If the plant can achieve a carbon capture rate of 97 %, that is very good and it appears to meet the required standards.
- I also feel, that if it is of a high purity, then that could be a bonus, as it could be used in food manufacturing and other processes, where high purity is needed.
- I feel SSE should endeavour to use as much of the carbon dioxide, as it can to produce valuable by-products, which could include cement substitutes, building blocks, plasterboard and animal feed.
- Carbon dioxide can also be fed to soft fruit, salad vegetables, tomatoes, flowers and other plants in giant greenhouses or vertical farms.
- Polyester yarn can also be made from carbon dioxide.
It is my belief that this list of products will grow in the next ten years and carbon dioxide of a high purity will become an important chemical feedstock.
Replacement of Blue Hydrogen With Green
If SSE Renewables were to build an electrolyser near to H2NorthEast, they could use that to replace the blue hydrogen.
- From an offtaker’s point of view green and blue hydrogen would be identical.
- It’s just that the green hydrogen doesn’t produce any carbon dioxide.
- I can see the complex being run to produce enough carbon dioxide to supply the users that need it and producing blue and/or green hydrogen accordingly.
Hopefully, the more uses that can be found for the carbon dioxide, the less of it will need to use long-term storage.
Expanding The Plant
As blue and green hydrogen plants create an identical product, the decision of whether to add an extra blue hydrogen or green hydrogen plant can be taken solely on financial grounds.
Conclusion
This looks like it could be a very sensible decision by SSE.
SeAH To Deliver Monopiles For Vattenfall’s 2.8 GW Norfolk Vanguard Offshore Wind Project
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
Vattenfall has signed a contract with SeAH Wind to provide the monopiles for the 2.8 GW Norfolk Vanguard East and Norfolk Vanguard West offshore wind farms in the UK.
These two paragraphs outline the order.
The monopiles for the Norfolk Vanguard offshore wind farms will weigh up to around 2,200 tonnes and have a length of up to 96 metres.
Production is due to start in 2026 at SeAH Wind’s new under-construction facility in Teesside, northeast England.
Note.
- Norfolk Vanguard now appears to be two 1.4 GW wind farms; East and West, which adds up to a 2.8 GW Norfolk Vanguard wind farm.
- There is no mention of the 1.4 GW Norfolk Boreas wind farm in the article, except that it has a Contract for Difference (CfD), whereas I don’t think Norfolk Vanguard has a contract.
- Would anybody buy wind farm foundations without a contract?
It looks like there has been some very tough negotiations between Vattenfall, the Crown Estate and the UK Government.
Is There An Alternative Approach?
Consider.
- If Vattenfall develop all three wind farms; Boreas, Vanguard East and Vanguard West, they will have 4.2 GW of capacity, when the wind co-operates.
- But East Norfolk is not noted for industries that need a large amount of electricity.
- I also feel, that the locals would object to a steelworks or an aluminium smelter, just like they object to electricity cables.
But would they object to a 4 GW offshore electrolyser?
Could this be Vattenfall’s alternative approach?
- A giant electrolyser is built close to the landfall of the cable to the wind farms.
- The hydrogen could be piped to Bacton, where it could be blended with the UK’s natural gas.
- Bacton also has gas interconnectors to Balgzand in the Netherlands and Zeebrugge in Belgium. Could these interconnectors be used to export hydrogen to Europe?
- The hydrogen could be piped to Yarmouth, where it could be exported by tanker to Europe.
There would be only a small amount of onshore development and no overhead transmission lines to connect the wind farms to the National Grid.
There would be even less onshore development, if the electrolyser was offshore.
From their decisions, Vattenfall seem to have a new plan.
Masdar To Invest In Iberdrola’s 1.4 GW East Anglia Offshore Wind Project
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
Iberdrola and Masdar have signed a strategic partnership agreement to evaluate the joint development of offshore wind and green hydrogen projects in Germany, the UK, and the US, which also includes an investment in Iberdrola’s 1.4 GW East Anglia 3 offshore wind project in the UK.
These first two paragraphs outline the del.
After the parties’ successful co-investment in the Baltic Eagle offshore wind farm in Germany, the new milestone of this alliance will be to achieve a further co-investment concerning the 1.4 GW East Anglia 3 offshore wind project in the UK, said the companies.
According to the partners, the deal has been under negotiation for the last few months and could be signed by the end of the first quarter of 2024. Masdar’s stake in the wind farm could be 49 per cent.
This deal appears to be very similar to Masdar’s deal with RWE, that I wrote about in RWE Partners With Masdar For 3 GW Dogger Bank South Offshore Wind Projects.
- The Iberdrola deal involves the 1.4 GW East Anglia 3 wind farm, which has a Contract for Difference at £37.35 £/MWh and is scheduled to be completed by 2026.
- The RWE deal involves the 3 GW Dogger Bank South wind farm, which doesn’t have a Contract for Difference and is scheduled to be completed by 2031.
- Both deals are done with wind farm developers, who have a long track record.
- Both wind farms are the latest to be built in mature clusters of wind farms, so there is a lot of production and maintenance data available.
I suspect, that many capable engineers and accountants can give an accurate prediction of the cash flow from these wind farms.
I will expect that we’ll see more deals like this, where high quality wind farms are sold to foreign energy companies with lots of money.
Just over five years ago, I wrote World’s Largest Wind Farm Attracts Huge Backing From Insurance Giant, which described how and why Aviva were investing in the Hornsea 1 wind farm.
Conclusion
It appears that Masdar are doing the same as Aviva and usind wind farms as a safe investment for lots of money.
Plans for Hydrogen Development At Dogger Bank D Gain Ground
The title of this post, is the same as that of this article on offshoreWIND.biz.
This is the sub-heading.
Dogger Bank D, the potential fourth phase of the world’s largest offshore wind farm under construction, Dogger Bank Wind Farm, has awarded contracts to engineering consultants to support the feasibility and optimization of a large-scale green hydrogen development option on the project
These three paragraphs outline the project.
SSE Renewables and Equinor, the developers of the Dogger Bank wind farm in the UK, awarded contracts for green hydrogen concept and engineering and optimization studies to Genesis, H2GO Power, and Fichtner.
If progressed for delivery, Dogger Bank D would be located in the North Sea around 210 kilometers off the northeast coast of England. Subject to the successful outcome of further technical studies, the project could be capable of generating up to around 2 GW of renewable power.
The 2 GW offshore wind farm is currently planned to comprise 128 wind turbines and up to six offshore platforms.
Note.
According to the article, this would be one of the UK’s largest green hydrogen production facilities.
The partners said, that the project could contribute to the UK Government’s electrolytic hydrogen ambitions for 5 GW by 2030.
This is said about the studies.
Using AI machine learning and robust modeling, these studies will investigate the multitude of interdependent variables required to optimize a potential green hydrogen production facility, such as offshore wind farm sizing, electrolysis capacity, transport and storage capacity, water availability, and offtake optionality.
I was using robust modelling on projects such as these fifty years ago, both with Artemis and bespoke software.
To my mind, SSE Renewables and Equinor are doing the right thing. If anybody has a similar project with lots of variables, I’d love to give my opinion.
I have some thoughts.
How Much Hydrogen Will Be Produced?
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.
This would mean that if the Japanese built one Herne Bay-size electrolyser, then it would produce around three hundred tonnes of hydrogen in an average month.
Consider.
- Dogger Bank D is likely to be a 2 GW wind farm.
- This document on the OFGEM web site, says that the Dogger Bank wind farms will have a capacity factor of 45 %.
- This means that Dogger Bank D wind farm will produce an average of 900 MW over a year.
- This works out at 7,884 GWh of electricity in a year.
As each tonne of hydrogen needs 55.2 MWh to be produced, this means if all the electricity produced by Dogger Bank D, is used to create green hydrogen, then 142,826.1 tonnes will be produced.
How Will The Hydrogen Be Brought Ashore?
142,826.1 tonnes is a lot of green hydrogen and the easiest ways to transfer it to the shore would be by a pipeline or a tanker.
I wouldn’t be surprised to see the use of tankers, as this would give more flexibility and allow the export of hydrogen to countries in need of hydrogen.
Will There Be Hydrogen Storage In The Dogger Bank D Wind Farm?
This would surely be a possibility, but there are security considerations.
Cost would also be a factor!
The Location Of The Dogger Bank D Wind Farm
I clipped this map of Dogger Bank A, B, C and D wind farms from this page of the Dogger Bank D web site.
Note.
- RWE’s Dogger Bank South wind farm is not shown on the map.
- Dogger Bank D wind farm is the most Easterly of the four wind farms being developed by SSE Renewables and Equinor.
- Dogger Bank D wind farm must be the closest of the Dogger Bank wind farms to the Eastern border of the UK’s Exclusive Economic Zone or EEZ.
Dogger Bank D wind farm would appear to be ideally placed to supply hydrogen to a number of places, by either pipeline or tanker.
Could Dogger Bank South Wind Farm Also Produce Hydrogen?
In RWE Partners With Masdar For 3 GW Dogger Bank South Offshore Wind Projects, I talked about the change of ownership of the Dogger Bank South wind farm.
I would assume that the Dogger Bank South wind farm will be located to the South of the Dogger Bank A,B, C and D wind farms.
Whether it will produce hydrogen will be a matter for the owners and market conditions.
I do believe though, that it could share some facilities with the those that might be built for Dogger Bank D wind farm.
Conclusion
After this brief look, Dogger Bank D could be an ideal place to build a large hydrogen production facility.
Centrica’s Rough Storage Facility Pumps Gas Into Grid To Meet Increased Demand
The title of this post, is the same as that of this press release from Centrica.
This is the sub-heading.
The UK’s largest gas storage facility, Rough, has released stored gas into the grid to help the UK both manage higher heating demand during the current cold weather and keep prices down. This is the first time Rough has released gas this winter.
These three paragraphs describe how Centrica are using Rough and how they will use it in the future.
This year, Centrica has filled Rough with the equivalent of 18 LNG tankers. Rough provides enough energy to heat over 3 million homes, every day, all winter, keeping families warm and bills down.
Rough is the UK’s largest gas storage facility. It stopped storing gas in 2017 but was re-opened for gas storage in October 2022, and its capacity was doubled in the summer of 2023. The facility, which is 18 miles off the coast of East Yorkshire, now provides half of the UK’s total gas storage.
Centrica’s long-term ambition is to turn the Rough gas field into the largest long duration low carbon energy storage facility in the world, capable of storing both natural gas and hydrogen.
It does seem that Centrica have handled the Rough facility well.
But I do feel that Centrica are playing a bigger game.
- In Lhyfe And Centrica To Develop Offshore Renewable Green Hydrogen In The UK, I talk about how Centrica will produce hydrogen offshore.
- Would this hydrogen be conveniently produced near to Rough?
- Rough allow Centrica to buy gas at a low price and sell high. Rough could be a neat little profit centre?
- I suspect lessons learned at Rough, could be applied to other gas storage facilities?
- Centrica have taken a substantial stke in HiiROC, who are developing a new way of producing green hydrogen.
- In Centrica Partners With Hull-Based HiiRoc For Hydrogen Fuel Switch Trial At Humber Power Plant, I talk about how Centrica are helping HiiROC with full scale trials.
I certainly like what they’re doing.
Do Rolls-Royce mtu Have A Plan To Decarbonise Their Diesel Engines For Rail Applications?
Data Sheets For Rolls-Royce mtu Diesel Engines For Trains
These are data sheets for various Rolls-Royce mtu diesel engines that can be used in rail applications.
Rolls-Royce Releases mtu Rail Engines For Sustainable Fuels
The title of this section, is the same as that of this press release from Rolls-Royce.
These four bullet points, act as sub-headings.
- mtu Series 1300, 1500 and 1800 engines already released; Series 1600 and 4000 to follow shortly
- Up to 90% CO2 savings by operating existing engines with Hydrotreated Vegetable Oil (HVO/renewable diesel)
- Locally emission-free operation possible in combination with mtu Hybrid PowerPack
- Field tests with DB Cargo and RDC Autozug Sylt
This is the first paragraph.
Rolls-Royce is taking a significant step towards even more climate-friendly rail transport with the release of mtu rail engines for use with sustainable fuels. With synthetic diesel fuels of the EN15940 standard, CO2 emissions can be reduced by up to 100 percent compared to fossil diesel. Hydrotreated Vegetable Oil (HVO or renewable diesel), which is already commercially available today, reduces CO2 emissions by up to 90 percent. If the fuels are produced with the help of renewable energy and green hydrogen – through what is termed a Power-to-X process – existing rail vehicles can be operated in a completely CO2-neutral manner. The mtu Series 1800 engines which are used in mtu PowerPacks, as well as Series 1300 and 1500 for locomotives and multi-purpose vehicles, are already approved for use with synthetic fuels such as HVO. Series 1600 and versions of Series 4000 engines will follow in the near future. The release of engines for climate-friendly fuels requires a series of tests and trials and Rolls-Royce has found strong partners for this activity. DB Cargo and RDC Autozug Sylt have already tested or are currently testing mtu Series 4000 engines with HVO in their locomotives.
How Does That Fit With The UK’s Population Of Rolls-Royce mtu Diesel Engines?
These classes of train have Rolls-Royce mtu engines.
- Class 43 power cars – 6V 4000 R41R
- Class 168 train – 6R 183 TD 13H
- Class 170 train – 6R 183 TD 13H
- Class 172 train – 12V 1800 R83
- Class 195 train – 12V 1800 R85L
- Class 196 train – 12V 1600 R85L
- Class 197 train – 12V 1600 R85L
- Class 800 train – 12V 1600 R80L
- Class 801 train – 12V 1600 R80L
- Class 802 train – 12V 1600 R80L
- Class 805 train – 12V 1600 R80L
- Class 810 train – 12V 1600 R80L
Note.
- Class 168 and 170 trains seem to be powered by older model Rolls Royce mtu engines.
- Class 180, 220,221 and 222 trains are powered by Cummins engines.
- I can’t find what engines power Class 805 and 810 trains, but it is reasonable to assume they have the same engines as the other Hitachi trains.
- As CAF are building LNER’s new tri-mode trains, I suspect these trains will also have Rolls Royce mtu engines.
It would appear that all the Rolls-Royce mtu rolling stock in the UK, with the possible exception of the Class 168 and 170 trains will be able to run on sustainable fuels.
Rolls Royce mtu And Hydrogen
This press release from Rolls-Royce is entitled Rolls-Royce Successfully Tests mtu Engines With Pure Hydrogen.
This is the first paragraph.
Rolls-Royce today announces that it has conducted successful tests of a 12-cylinder gas variant of the mtu Series 4000 L64 engine running on 100% hydrogen fuel. The tests, carried out by the Power Systems business unit, showed very good characteristics in terms of efficiency, performance, emissions and combustion. These tests mark another important step towards the commercial introduction of hydrogen solutions to meet the demand of customers for more sustainable energy.
Engines of mtu’s 4000 family are used in Class 43 power cars, so surely these developments could lead to hydrogen-powered freight locomotives.
The picture shows a Class 43 power car at Glasgow Queen Street station.
Could Rolls-Royce mtu hydrogen power keep these iconic trains running for a few more years?
In ‘Spirit of Innovation’ Stakes Claim To Be The World’s Fastest All-Electric Vehicle, I look at Rolls-Royce’s Spirit of Innovation, which set the record for an electric vehicle at 555.9 km/hour.
As the InterCity125 already holds the record for the fastest diesel train, perhaps Rolls-Royce will attempt to set a record for the fastest hydrogen-powered train?
Decarbarbonising The CAF Class 195, 196 And 197 Trains
If Rolls-Royce mtu develop a hydrogen version of the 1800 diesel engine, then this could be used to fully decarbonise the CAF trains.
The operators may consider it’s not worth it and continue with using sustainable fuels.
But the possibility is surely there.
There must also be the possibility of developing a fuel cell replacement for the 1800 diesel, that can be slotted into the train.
Decarbarbonising The Hitachi Class 80x Trains
Hitachi are developing battery packs and the data sheet can be downloaded from this page on the Hitachi web site.
Decarbarbonising The CAF Tri-Mode Trains
I feel that as CAF usually use Rolls-Royce mtu engines, I suspect these trains will be designed, so they can be converted to hydrogen.
Conclusion
Rolls-Royce mtu appear to be on a path to decarbonise all their diesel engines.
Rolls-Royce Announces Successful Run Of UltraFan Technology Demonstrator To Maximum Power
The title of this post, is the same as that of this press release from Rolls-Royce.
This is the sub-heading.
Rolls-Royce today announces it has successfully run its UltraFan® technology demonstrator to maximum power at its facility in Derby, UK. The initial stage of the test was conducted using 100% Sustainable Aviation Fuel (SAF).
These are the first four paragraphs.
This is an important milestone for the UltraFan demonstrator, which was successfully tested for the first time earlier this year. Since then, the UltraFan team has been gradually increasing the power as part of the rigorous testing regime and the demonstrator has performed in line with our expectations. The results of the test will provide us with valuable learning and data, which our teams will now take away and continue to analyse.
This achievement reinforces our confidence in the suite of technologies that has been developed as part of the UltraFan programme. Confirming this capability is a big step towards improving the efficiency of current and future aero-engines as UltraFan delivers a 10% efficiency improvement over our Trent XWB, which is already the world’s most efficient large aero-engine in service. In total that’s a 25% efficiency gain since the launch of the first Trent engine.
UltraFan’s scalable technology from ~25,000-110,000lb thrust also offers the potential to power the new narrowbody and widebody aircraft anticipated in the 2030s.
As part of the UltraFan development programme we have identified a number of technologies that are potentially transferable to our current Trent engines, which will provide our customers with even greater availability, reliability and efficiency.
These are my thoughts.
What Is UltraFan?
UltraFan has a section in the Wikipedia entry for the Rolls-Royce Trent engine, where these are the two opening paragraphs.
After the Advance comes the UltraFan, initially aimed to be ready for service from 2025. A geared turbofan with a variable pitch fan system that promises at least 25% improvement in fuel burn, the UltraFan aims for a 15:1 bypass ratio and 70:1 overall pressure ratio.
The Ultrafan keeps the Advance core, but also contains a geared turbofan architecture with variable-pitch fan blades. As the fan will vary pitch to be optimised for each flight phase, it won’t need a thrust reverser. Rolls-Royce will use carbon composite fan blades instead of its usual hollow titanium blades, and along with new material adoption will save 340 kg (750 lb) per engine.
This is a bit different from previous engines.
Variable-Pitch Fan Blades
Variable Pitch Fan has its own Wikipedia entry, where these are the two opening paragraphs.
A variable pitch fan is similar in concept to that of a variable-pitch propeller and involves progressively reducing the pitch (or blade angle) of the fan on a turbofan as the engine is throttled. Although variable pitch fans are used in some industrial applications, the focus of this article is on their use in turbofan engines. No production engine uses such a feature; however, it will likely be required on at least some of the next generation of high bypass ratio turbofans.
One of the methods used to reduce Thrust-specific fuel consumption is to improve Propulsive Efficiency. This involves reducing the effective jet velocity of the engine by reducing specific thrust. This, in turn, reduces the optimum fan pressure ratio required and consequently the cold nozzle pressure ratio. At cruise flight speeds the nozzle is choked and the fan working line is fairly steep and linear. However, at low flight speeds the ram pressure rise in the air intake is so low the nozzle is well un-choked. Consequently, the fan working line is highly curved and well to the left of the cruise flight speed working line, potentially reducing the fan surge margin to a dangerous level, particularly at lower throttle settings. Readers unfamiliar with surge lines, working lines, etc. should read the Wikipedia article on Compressor map.
The extract says that no production engine uses this feature. So will UltraFan be the first?
Variable pitch fan blades seem to offer two advantages; better efficiency and lower weight. If the reliability is acceptable, then that must be a winner.
No Thrust Reverser
This sentence is also in the Wikipedia entry for Variable Pitch Fan.
One advantage of the variable fan option is that varying the fan pitch offers the possibility of reversing engine thrust without the need for heavy blocker doors, cascades, etc.
It does look like the UltraFan will be a lighter engine, than its predecessor.
Composite Fan Blades
Composite Fan Blades were tried in the 1960s for the Rolls-Royce RB211 engine.
But they failed and were replaced by titanium blades.
At the time, I was at Liverpool University and John Wilkinson was a fellow student.
John’s father was the manager of a Tesco store in Derby.
That Tesco store had a nice line in selling out-of-date chickens and turkeys to Rolls-Royce to test the engines for bird strikes.
Improving The Engine’s Efficiency
This is the second paragraph of the press release.
This achievement reinforces our confidence in the suite of technologies that has been developed as part of the UltraFan programme. Confirming this capability is a big step towards improving the efficiency of current and future aero-engines as UltraFan delivers a 10% efficiency improvement over our Trent XWB, which is already the world’s most efficient large aero-engine in service. In total that’s a 25% efficiency gain since the launch of the first Trent engine.
Note.
- The Trent engine was first run in 1990 and has improved 25 % since.
- The Trent XWB engine was first run in 2010 and has improved 10 % since.
The increase in efficiency appears to be linear.
A Saleable Design
This is the third paragraph of the press release.
UltraFan’s scalable technology from ~25,000-110,000lb thrust also offers the potential to power the new narrowbody and widebody aircraft anticipated in the 2030s.
If that means that an UltraFan can power an aircraft as small as an A320, then that is sensational, as it will give Rolls-Royce access to the A320/Boeing 737 market, where they have virtually no sales.
UltraFan Is About A Suite Of Technologies
This is from the second paragraph of the extract.
This achievement reinforces our confidence in the suite of technologies that has been developed as part of the UltraFan programme.
And this is the fourth paragraph.
As part of the UltraFan development programme we have identified a number of technologies that are potentially transferable to our current Trent engines, which will provide our customers with even greater availability, reliability and efficiency.
As you learn more about your future project, why not apply that knowledge to current projects.
Running On SAF Is Part Of The Testing
I’m reassured that testing of the technology using Sustainable Aviation Fuel has started early in the program.
This is surely going to be the fuel, that aircraft will use until hydrogen becomes available.
Conclusion
It looks like Rolls-Royce are redefining, what a standard aero engine looks like.
- It will give a 10 % fuel saving over their latest engines launched thirteen years ago.
- The UltraFan engines will save weight and hopefully more fuel.
- It will allow Rolls-Royce to compete in the A320/737 market, where they have no engine at present.
I would watch the share price
The Anonymous Widower 