User Bulletin Board
Pipe in Daylight.
Clearly the approach needs to be multi-factorial and one source of heat generation has to be lighting. Could not a system of light distribution from the surface using fibre-optic cables be used to replace all the fluorescent tubes? Also the installation of video-board advertising in stations seems insane. These panels must generate hugh amounts of heat and are totally superfluous. ~ Arthur Duce 18 Jun 2008
Make the Trains 'slippy'
Avoid some of the heat by making the trains more streamlined. Roger Groombridge 27th January 2008
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Underground coal mines cooling system
Hi,
This is Jim Yu from Chicago, IL USA. We
are looking for good cooling system for underground coal mines (more
than 1000 meters below surface). Could you please let me know which
company can offer cooling system for underground coal mines (under
1000 meters) ? Do you know which company have those kind of product
and services to resolve this issue ?
Thank you,
Jim Yu 16/08/2005
(Ref:001)
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Date: Wed, 14 Mar 2007 8.18AM
From: Brian Lee
Subject: Solutions to cooling the London Underground
In order to effectively cool the entire London Underground system, we have to focus on three areas. These are the running tunnels, the stations and the trains.
To cool the running tunnels
Install pipes carrying chilled water/coolant between the rails or along the tunnel walls (like the Channel Tunnel). The coolant can be the Thames River water. Cooling stations can be located at regular intervals along the line to suck up the coolant and re-chill it.
To cool the stations
Since it is easier to cool the ticket halls, why not install air-conditioners in the ticket halls and direct the cooled air into the platforms by the means of air ducts or the escalator shafts?
Cool air can be blasted through openings in the platform floor itself or along the track. Exhaust air on the other hand is sucked out of the station through openings in the ceiling.
Chilled water can be piped along the platform and escalator tunnel walls.
Also, since plants (as in trees and flowers) are able to absorb heat for transpiration, major planting can be carried out along platform walls or in ticket halls. However, water vapour from the plants must be released into the atmosphere. This can be done using small ventilation gaps along the platform ceiling.
To cool the trains
New tube stock should be fitted with regenerative breaks. Water can be sprayed onto the rails or wheels of the trains either as they enter the station or after they have stopped. This is to absorb the heat produced by friction breaking. However, there may be drastic differences in the braking quality of the train if the water is sprayed onto the wheels as the train is braking.
Referring to a suggestion on spraying the trains with water before they enter the tunnel, why not spray them when they are in the station. The sprays can be located on the opposite side of the platform (tunnel wall) and will only be activated when the train has come to a complete stop. This will prevent passengers from getting wet
Referring to a suggestion on spraying the trains with water before they enter the tunnel, why not spray them when they are in the station. The sprays can be located on the opposite side of the platform (tunnel wall) and will only be activated when the train has come to a complete stop. This will prevent passengers from getting wet. -- Brian Lee
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Another contributor's idea.
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Subject: FW: I'm no engineer...
... but I am a regular commuter on the stiflingly hot London Underground.
I was thinking about the hot topic today on the way to work - well dreaming of cooler days in fact - and I remembered how they were able to clean up the river Thames. They use a boat called The Bubbler which pumped oxygen into the water - hence helping life thrive again
That led me to thinking about adding an extra carriage to the back of all tube trains (or just a few) or have a dedicated train that could ride through the tunnels churning out refrigerated air. As I understand it, the trains then push this air around the entire tube system and could, in theory?, help cool things down.
Is this a ridiculous and naive idea? Feel free to shoot it down if you like. I'd just like to know how plausible or implausible it is.
Thanks - Josh Haines josh.haines(at)talk21.com - 23/05/2007
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