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HS2 railway

CliveS
We would all agree that an express link fro London to Birmingham and Manchester would be of great benefit BUT do we have to electrify the entire length of track or just the parts inside city boundaries. 

We can half the construction/infrastructure cost if we use diesel electric trains cross country and convert to electric only inside the city. 

This is environmentally friendly as power stations are only 60% efficient at best and mostly use gas at normal/peak times anyway; isn't it ??
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    Andy Millar:

    ...to retain my environmental credentials I will admit that we do need to find a low CO2 approach to firing steam engines first …




    Andy,

    How about going for a modern take on the Scotts Still engine, but fuelling it with hydrogen. This was a diesel/steam hybrid having a diesel cylinder as normal but with the diesel exhaust heating steam which was used on the undersides of the pistons making it double acting. With hydrogen fuel you would be condensing water from the exhaust which would make up for lost water in the steam cycle. Of course, you will probably find there was a reason it didn't catch on. (I know of two ships that had this engine installed when built in the late 1920's and when one of them was torpedoed by a U-Boat in 1942 the story is that the engineers in the lifeboats were cheering as the ship sank...…..)

    Alasdair

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  • 0

    Andy Millar:

    ...to retain my environmental credentials I will admit that we do need to find a low CO2 approach to firing steam engines first …




    Andy,

    How about going for a modern take on the Scotts Still engine, but fuelling it with hydrogen. This was a diesel/steam hybrid having a diesel cylinder as normal but with the diesel exhaust heating steam which was used on the undersides of the pistons making it double acting. With hydrogen fuel you would be condensing water from the exhaust which would make up for lost water in the steam cycle. Of course, you will probably find there was a reason it didn't catch on. (I know of two ships that had this engine installed when built in the late 1920's and when one of them was torpedoed by a U-Boat in 1942 the story is that the engineers in the lifeboats were cheering as the ship sank...…..)

    Alasdair

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