Chiltern Railways Seeks Proposals For Low-Emission Multiple-Unit Fleet
The title of this post, is the same as that of this article on Railway Gazette.
These are the first three paragraphs.
Chiltern Railways is seeking proposals for the supply of between 20 and 70 new or converted ‘low-emission’ multiple units.
The operator has called for ‘established’ rolling stock manufacturers, owners and modifiers to propose vehicles which would provide a ’meaningful’ reduction in the emissions and external noise compared to its existing diesel multiple-units, particularly in urban areas.
The envisaged five-year framework agreement has an estimated value of up to £400m, including supply and maintenance of the fleet, refuelling infrastructure and any depot modifications.
I have my thoughts.
Chiltern’s Rolling Stock
Chiltern Railways have two different types of rolling stock; diesel multiple units and rakes of coaches haled by diesel locomotives.
Chiltern’s Diesel Multiple Units
Chiltern has these diesel multiple units.
- Class 165 diesel trains – 28 x two-cars – 56 cars
- Class 165 diesel trains – 11 x three-cars – 33 cars
- Class 168 diesel trains – 9 x two-cars – 18 cars
- Class 168 diesel trains – 9 x three-cars – 27 cars
- Class 168 diesel trains – 10 x four-cars – 40 cars
Note.
- The trains were built between 1990 and 2004.
- The Class 165 trains are 75 mph units, whereas the Class 168 trains are 100 mph units.
- These total to 67 trains and 174 cars.
- This is an average train length of 2.6 cars.
Could a fleet of three-car low-emission 100 mph trains fit Chiltern’s requirements?
- They could work in pairs for six-car units for Birmingham Moor Street and Oxford.
- There may be a need for some four-car units.
But how will they be powered?
- Pure diesel will surely give out too many emissions!
- Would an mtu Hybrid PowerPack lower emissions enough?
- Could hydrogen-power be used, either with fuel-cells or a hydrogen internal combustion engine?
In Alstom And Eversholt Rail Sign An Agreement For The UK’s First Ever Brand-New Hydrogen Train Fleet, I wrote about Alstom’s proposed Hydrogen Aventra.
A version of these trains could be ideal, if Children could source the fuel economically.
Chiltern’s Diesel-Hauled Rakes Of Coaches
Chiltern have four rakes of Mark 3 coaches hauled by Class 68 locomotives.
These could be replaced by pairs of three-car low-emission’ multiple units.
Conclusion
A fleet of seventy three-car ‘low-emission’ multiple units, powered by hydrogen could be an innovative solution to the trains to run Chiltern’s services.
The Anonymous Widower 
The GCR was built to a larger loading gauge than earlier UK railways which ought to make electrification a lot less costly than some older routes. This would allow BEMUs anything else is pointless.
Comment by Nicholas Lewis | August 8, 2023 |
But electrification is always so disruptive. And they always find a silly problem, like an unmarked sewer.
Comment by AnonW | August 9, 2023 |
Having recently been given the impression that hybridisation of Chiltern fleet was dead, in the context of this post I think this Chiltern Railways presentation published by the IMechE is pertinent and really worth watching.
Given the working of the ITT, I’d say conversion of the existing fleet is still on the cards.
Comment by fammorris | August 9, 2023 |