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Post by jkwok678 on Jul 11, 2022 16:31:42 GMT
Quite a few years ago, they installed a water cooled fan on the ceiling towards the end of the platform at oxford circus on the central line.
What's happened to it? It doesn't seem to blow much cooler air anymore.
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Post by Chris L on Jul 11, 2022 17:39:00 GMT
Quite a few years ago, they installed a water cooled fan on the ceiling towards the end of the platform at oxford circus on the central line. What's happened to it? It doesn't seem to blow much cooler air anymore. It was installed as a trial. It proved difficult to maintain and prone to getting clogged by Underground grime. |
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Post by jkwok678 on Jul 12, 2022 17:03:50 GMT
I assume most of the grime came from the running tunnels and trains right?
I imagine full height platform screen doors could have made it easier to maintain.
What other stations/ platforms were also part of the trial?
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Post by stapler on Jul 12, 2022 17:35:20 GMT
Fluff, hair, brake dust, skin particles, fibres?
I was reminded of how originally the CLR trains were supposed to clear the air by piston effect in a snug-fit tunnel, let alone fans. A WB train ex-Loughton was tipped out at Leytonstone following some defect, and we all crowded onto already full T56, presumably ex-Hainault. I leant out of the car end window; it being 85F - and on entering the tunnel mouth west of Leyton, got a mouthful of the 2-ft long hair of the girl who was doing the same in the car in front.
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Post by Chris L on Jul 12, 2022 19:23:30 GMT
I assume most of the grime came from the running tunnels and trains right? I imagine full height platform screen doors could have made it easier to maintain. What other stations/ platforms were also part of the trial? Another part of the trial was using ground water to chill parts of a station. |
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Post by Chris L on Jul 12, 2022 19:25:01 GMT
Fluff, hair, brake dust, skin particles, fibres? I was reminded of how originally the CLR trains were supposed to clear the air by piston effect in a snug-fit tunnel, let alone fans. A WB train ex-Loughton was tipped out at Leytonstone following some defect, and we all crowded onto already full T56, presumably ex-Hainault. I leant out of the car end window; it being 85F - and on entering the tunnel mouth west of Leyton, got a mouthful of the 2-ft long hair of the girl who was doing the same in the car in front. The piston effect also means that any chilled air was pushed into the tunnel. |
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Post by Dstock7080 on Jul 12, 2022 21:20:41 GMT
They are trying again with air-cooling as part of the PLU Piccadilly Line Upgrade, a trial unit of a new design has recently been fitted at Holborn (disused).
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Post by jimbo on Jul 12, 2022 23:00:04 GMT
This is a serious problem not easily solved! With hotter summers, growing demand, new air con. trains dumping their heat in the tunnels, faster trains, hopes of 36tph, etc. It will only get worse!
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Post by brigham on Jul 13, 2022 6:50:39 GMT
Another part of the trial was using ground water to chill parts of a station. This was before it was understood that ground water was hot enough to eliminate the need for gas central heating... |
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Post by stapler on Jul 14, 2022 19:27:40 GMT
I don't think it's the ground **water** that's hot - as that can be a thousand feet below London. But it's certain the ground does not offer a cooling solution.
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zbang
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Post by zbang on Jul 15, 2022 17:22:19 GMT
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Post by jamesb on Jul 16, 2022 23:02:21 GMT
At Tottenham Court Road earlier, I was struck by the cool air as I exited the Northern line platform heading towards the Elizabeth Line. The Northern line platform was hot and stuffy, yet as I passed from the platform into the passageway it felt like somebody had opened the door of a fridge. Never mind the signs - I think I would be able to find my way to the Elizabeth Line platforms just by following the cool air!
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Post by Chris L on Jul 17, 2022 5:30:33 GMT
At Tottenham Court Road earlier, I was struck by the cool air as I exited the Northern line platform heading towards the Elizabeth Line. The Northern line platform was hot and stuffy, yet as I passed from the platform into the passageway it felt like somebody had opened the door of a fridge. Never mind the signs - I think I would be able to find my way to the Elizabeth Line platforms just by following the cool air! The fans on the Elizabeth line are much bigger than elsewhere. The shafts are purpose built unlike many on the Underground where lift and construction shafts were repurposed. Even the Victoria line was built with relatively small fans and shafts. |
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Post by trt on Jul 18, 2022 9:34:10 GMT
At Tottenham Court Road earlier, I was struck by the cool air as I exited the Northern line platform heading towards the Elizabeth Line. The Northern line platform was hot and stuffy, yet as I passed from the platform into the passageway it felt like somebody had opened the door of a fridge. Never mind the signs - I think I would be able to find my way to the Elizabeth Line platforms just by following the cool air! The fans on the Elizabeth line are much bigger than elsewhere. The shafts are purpose built unlike many on the Underground where lift and construction shafts were repurposed. Even the Victoria line was built with relatively small fans and shafts. But Elizabethan fans look to be much smaller than Victorian ones!    |
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Post by jimbo on Jul 22, 2022 9:38:55 GMT
TfL to introduce cooling systems for Tube lines link Current cooling thinking to support the new Picc trains. More pictures here link More tech. details here link Earl's Court seems to have been dropped from the list of stations needing cooling! |
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Post by xtmw on Jul 24, 2022 9:31:32 GMT
Apparently TfL are testing new ways of cooling down platforms at Aldwych/Holborn (old) platforms
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Post by Chris L on Jul 24, 2022 12:12:21 GMT
Apparently TfL are testing new ways of cooling down platforms at Aldwych/Holborn (old) platforms See the link in the previous post. Aldwych is not involved. |
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Post by jimbo on Jul 25, 2022 4:22:30 GMT
Are Knightsbridge, Holborn, Green Park, Leicester Square and Piccadilly Circus noticeably hotter than other Picc stations? Presume this is to be paid through the Picc Upgrade project, and justified by a promised 60% service uplift if new signalling is ever undertaken! The Bakerloo upgrade promised only a 37% uplift to 27tph. The Central Line upgrade will only achieve a 25% uplift, building on the current intense service, whilst the Waterloo & City Line upgrade expects a 40% uplift. All lower than the Picc growth, so maybe less cooling required on those other lines when new trains eventually arrive.
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