First In-flight 100% Sustainable-Fuels Emissions Study Of Passenger Jet Shows Early Promise
The title of this post, is the same as that of this press release from Rolls-Royce.
This is the introductory paragraph.
Initial findings from a world-first study of the impact of 100% sustainable aviation fuel (SAF) on both engines of a commercial jet have provided promising early results.
The study was performed using an Airbus A350, which is powered by Rolls-Royce Trent XWB engines.
This paragraph describes the tests.
In April, the A350 flew three flights over the Mediterranean Sea pursued by a DLR Falcon chaser plane to compare in-flight emissions of both kerosene and Neste’s hydro-processed esters and fatty acids (HEFA) sustainable fuel. The team also carried out compliance tests using 100% SAF and no operational issues were experienced.
I was surprised, when I first read this, that they used a chase plane to measure emissions, as I thought they’d simulate that in a test cell on the ground.
But this is probably, the best way to test the engines, whilst running on sustainable aviation fuel, in real-world conditions.
Conclusion
I believe that sustainable aviation fuel (SAF) will be the interim solution to flying until hydrogen-powered aircraft are developed.
Alstom And Liebherr Sign A Collaboration Agreement, In Order To Optimise Hydrogen Fuel Cells
The title of this post, is the same as that of this press release from Alstom.
The press release starts with these points.
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Liebherr is developing air management technology that is particularly well suited to hydrogen fuel cells.
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Alstom’s hydrogen strategy is part of its ambition to innovate by pioneering smarter and greener mobility solutions for all.
This paragraph then gives the basic outline of the agreement.
Alstom has signed a collaboration agreement with Liebherr – Aerospace & Transportation SAS, a France-based company specialising in the manufacture of compressors for fuel cells. This agreement is aimed at optimising hydrogen systems, including improving the reliability and durability of fuel cells, increasing their power density and reducing the cost of such solutions.
The press release gives a lot more details about Alstom’s hydrogen collaborations with other companies
Alstom seem very serious about hydrogen-powered trains.
Nuggets From The Union Connectivity Review
The Union Connectivity Review has now been published and it can be read online.
This paragraph outlines the objective of the Review.
The UK Government asked Sir Peter Hendy CBE to undertake a detailed review into how transport connectivity across the UK can support economic growth and quality of life in England, Scotland, Wales and Northern Ireland.
Sir Peter was also asked to make recommendations as to whether and how best to improve transport connectivity between the nations of the UK.
Sir Peter Hendy is the Chairman of Network Rail.
In no particular order, these are some nuggets from the review.
The Case For UKNET – A Strategic Transport Network For The Whole United Kingdom
This paragraph introduces the case for UKNET.
Having identified the importance of good connections across internal borders and the challenges that currently prevent a pan-UK strategic vision or investment strategy, the Review recommends that the UK Government develop UKNET – a strategic transport network for the whole United Kingdom which would connect all the nations of the
UK, with appropriate funding and coordination with the devolved administrations to deliver it.
The creation only follows best practice from the European Union and large countries like the United States.
These three paragraphs sum up how UKNET would work and how it would bring benefits to the whole of the UK.
UKNET would provide a network into which transport investment would be made on a pan-UK basis to support economic growth, jobs, housing and social cohesion, across the nations of the UK, for the benefit of the whole country.
It would allow transport appraisals for schemes on the network to be undertaken on a UK-wide basis with all costs and benefits being fully accounted for. This would limit the risk of cross-border schemes being deprioritised.
The development of such a network would provide additional certainty for businesses and the private sector, allowing them to plan complementary investments in specific regions and to invest in the supply chain across the country.
I think overall that UKNET is sound thinking, but my only feeling is that it should also look at transport links to and from the whole island of Ireland.
The Case for Faster Rail Journey Times Between England And Scotland
These three paragraphs probably apply to most rail journeys in the world, that compete against air and road travel.
Both the UK and Scottish Governments have previously agreed to develop options which could support a rail journey time between London and Scotland of three hours. A journey time improvement of this size, even when compared to expected journey times once HS2 opens, would dramatically increase the number of people travelling by rail.
There is a correlation between journey times and how many people choose to travel by rail over air. If it takes the same amount of time to travel by rail or by air, the evidence shows that people choose to travel by rail. Rail is typically favoured when the journey time is around three hours between city centres.
Work undertaken by Network Rail and HS2 Ltd on behalf of the Review has demonstrated the potential for increased trips by rail if journey times are reduced. For assurance purposes, two forecasting models were used to assess savings of 20, 35 and 50 mins on the journey times forecast for HS2 Phase 2b. The outcomes for both models were broadly similar and the approach built upon the changes in mode share observed between rail and aviation following previous UK and European rail investments.
Three hours between London and Scotland could be a tough ask.
Note these points about the East Coast Main Line.
- An InterCity 225 ran between London and Edinburgh on the 26th September 1191 in three hours and 29 minutes.
- Full digital in-cab signalling will allow running at 140 mph.
- There are improvements to come on the East Coast Main Line.
- As now, the review says two tph will run between London and Edinburgh.
- London Kings Cross and Edinburgh is 393 miles
- On the East Coast Main Line a non-stop train between would need to average 131 mph.
Three hours is tough but not impossible.
And these points about the West Coast Main Line.
- Trains will run on High Speed Two between London Euston and Crewe.
- High Speed Two are claiming fifty-six minutes between London Euston and Crewe.
- Full digital in-cab signalling will allow running at 140 mph.
- Crewe and Glasgow Central is 243.4 miles.
- Current fastest time between Crewe and Glasgow Central is three hours and five minutes.
- Between Crewe and Glasgow Central, a non-stop train would need to average 118 mph.
A well-driven InterCity 125, with a clear track, could average that speed between Crewe and Glasgow Central.
Three hours is tough but very possible.
This paragraph sums up the mode shift expected between air and road to rail.
These initial estimates indicated that a three-hour journey time was forecast to increase the number of passengers by around four million a year and increase rail mode share from the 2019 level of 29% to around 75%. It was also forecasted that journey times in the region of three hours would generate considerable transport user benefits and revenues over the lifetime of the scheme.
People travelling from the Midlands and North West England to and from Scotland would also get substantial reductions in journey times.
Linking High Speed Two With The WCML
The review says this about linking High Speed Two with the West Coast Main Line.
The UK Government has already acknowledged some of the issues identified by the Review. The ‘Golborne Link’—the current proposed connection between HS2 and the WCML—is expected to deliver quicker journey times and more capacity between England and Scotland and resolve some of the constraints between Crewe and Preston.
However, the ‘Golborne Link’ does not resolve all of the identified issues. The suitability of alternative connections between HS2 and the WCML have been considered by the Review. The emerging evidence suggests that an alternative connection to the WCML, for example at some point south of Preston, could offer more benefits and an opportunity to reduce journey times by two to three minutes more than the ‘Golborne Link’. However, more work is required to better understand the case for and against such options.
These benefits could also include additional operational flexibility when timing freight services and less disruption to the WCML than major upgrades as most construction could take place away from the railway.
An infrastructure philosophy is also detailed.
- Replacing and enhancing track, signalling and power supply.
- Possible new sections of line north of Preston.
- Maximising of line speed.
My feeling is that for good project management reasons and to give faster journey times with the existing trains, that a lot of these improvements should be started as soon as possible.
Borders Railway
The Review says this about the Borders Railway.
Communities in the Scottish Borders region are enthusiastic about the economic and social benefits they see resulting from an extension of the Borders Railway south, across the border, to Carlisle.
The Review also welcomes the £5 million in funding that the UK Government has made available for the development of a possible extension to the Borders Railway which would support improved connections to and from Scotland and with the WCML at Carlisle.
I would build this early, as when the West Coast Main Line is being upgraded between Carlisle and Glasgow, this would be available as a diversion route.
Perhaps too, the Glasgow South Western Line should be improved and electrified as well.
Air Passenger Duty
The Review has a sizeable session on Air Passenger Duty, where it concentrates on the problems of its application to domestic flights.
The Review makes this recommendation.
Where journeys are too long to be reasonably taken by road or rail, the UK Government should reduce the rate of domestic aviation tax.
I believe that before the end of this decade, there will be smaller zero-carbon airliners, that will be ideal for domestic routes, which could totally change the regime of domestic Air Passenger Duty.
Decarbonisation And The Future Of Flight
This is a section in the Review, where this is the first paragraph.
In July 2021, the Department for Transport published the Jet Zero Consultation: a consultation on our strategy for net zero aviation127, alongside the Transport Decarbonisation Plan. This includes the ambition to have zero-emission routes connecting different parts of the UK by 2030 and a commitment to assess the feasibility of serving PSO routes with low carbon aviation. The Review welcomes the commitments made in both publications to accelerate the uptake of sustainable aviation fuels (SAFs) and develop low and zero-emission aircraft.
The Review goes on to make two recommendations.
- Drive the uptake of sustainable fuels and zero emission technologies on domestic aviation through a combination of incentives, tax benefits and subsidies to make the UK a world leader in developing these fuels and technologies.
- Support the development of sustainable aviation fuel plants in parts of the United Kingdom that are particularly reliant on aviation for domestic connectivity.
Note.
- PSO means Public Service Obligation.
- One of the world leaders in the field of sustainable aviation fuels is Velocys, which is a spin out from Oxford University.
- The Review also suggests building a sustainable aviation fuel plant in Northern Ireland.
The Review gives the impression it is keen on the use of sustainable aviation fuel
Conclusion
There are some good nuggets in the sections I have read in detail.
This post is not finished and there will be additions to the list.