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London Transport (uk.transport.london) Discussion of all forms of transport in London. |
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#51
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I (Mark Brader) wrote:
Incidentally, a new air-conditioning system http://www.enwave.com is now coming into use for major downtown buildings here in Toronto, taking advantage of our location on Lake Ontario. Heat from these buildings is transferred into water being drawn from the lake ... Keith Chesworth: The Liverpool Post & Echo Building used/uses water pumped from the Mersey Tunnel ... The difference is, water from the bottom of a deep lake is always at 4 degrees Celsius (the temperature where water is densest). Water pumped out of a tunnel is going to be warmer than that. -- Mark Brader, Toronto | "One thing that surprises you about this business | is the surprises." -- Tim Baker My text in this article is in the public domain. |
#52
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![]() "Mark Brader" wrote in message ... John Alexander: I agree, the idea of cooling the trains on the tube lines is ridiculous until you extract heat from the stations and tunnel system first... Any sort of air-conditioning, to provide effective relief, would have to work no matter whether the train was on a surface, subsurface, or deep tube section. Therefore it would be necessary to air-condition the trains *as well* as applying measures to extract heat from the tunnels and stations. What is the problem with having a heat pump to suck heat out of a deep tube platform to a liquid (water?) and then to pump the liquid to the surface and chill the liquid there for return to the platform? As someone else said, it's just a matter of money. You either need to do something like that, or you need to move enough additional air through the tunnels and stations to ameliorate the heat buildup. The Channel Tunnel has a cold-water pipe running through each bore to absorb heat from the trains; the subway systems in New York and Toronto, on the other hand, without the deep and narrow tunnels that London has, run air-conditioned trains and let normal air circulation deal with the heat. Incidentally, a new air-conditioning system http://www.enwave.com is now coming into use for major downtown buildings here in Toronto, taking advantage of our location on Lake Ontario. Heat from these buildings is transferred into water being drawn from the lake for the city's drinking water system; the drinking water won't get significantly warmer than it now does in summer, because the water used for this purpose is coming from a new feed deeper in the lake where the temp- erature is always 4 Celsius (at which water is densest). Unfortunately, London doesn't have a Great Lake next to it... -- Mark Brader I believe there is a solution, its a bit Heath-Robinson but consists of a large tanker wagon, filled with water, pulled behind each train. As the train goes through the tunnel a very fine but copious spray of water is pumped out behind the train. This will absorb heat from the air and reduce the temperature. I claim the prize !!! Cheerz, ( © ) Baz |
#53
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snip
I believe there is a solution, its a bit Heath-Robinson but consists of a large tanker wagon, filled with water, pulled behind each train. As the train goes through the tunnel a very fine but copious spray of water is pumped out behind the train. This will absorb heat from the air and reduce the temperature. I claim the prize !!! Cheerz, ( © ) Baz But GHY with the humidity levels caused Keith J Chesworth www.unseenlondon.co.uk www.blackpooltram.co.uk www.happysnapper.com www.boilerbill.com - main site www.amerseyferry.co.uk |
#54
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![]() "Marratxi" I believe there is a solution, its a bit Heath-Robinson but consists of a large tanker wagon, filled with water, pulled behind each train. As the train goes through the tunnel a very fine but copious spray of water is pumped out behind the train. This will absorb heat from the air and reduce the temperature. I claim the prize !!! Cheerz, ( © ) Baz Hmmm, yes. But just a couple of points to dampen your euphoria (without wishing to be a complete wet sponge). What happens to all the water so sprayed? Having pulled this tanker to the end of the line how does it get transferred to the rear of the train and refilled in time for the return journey? |
#55
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#56
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![]() wrote in message ... Heavy snippage !! but the heat would still remain somewhere, even if absorbed into the water droplets. It's just like the cooling effect of a fan, it doesn't actually cool a room in a real sense, unless it expels the hot air outside the room. Perhaps there could be another wagon following that to collect the warm water for disposal at the end of the tunnel :-) Roger Tfl already claim (as mentioned earlier in this thread) to pump millions of litres of water a day out of the system, this would be just a little more !! Cheerz, Baz |
#57
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![]() "Piccadilly Pilot" wrote in message ... "Marratxi" I believe there is a solution, its a bit Heath-Robinson but consists of a large tanker wagon, filled with water, pulled behind each train. As the train goes through the tunnel a very fine but copious spray of water is pumped out behind the train. This will absorb heat from the air and reduce the temperature. I claim the prize !!! Cheerz, ( © ) Baz Hmmm, yes. But just a couple of points to dampen your euphoria (without wishing to be a complete wet sponge). What happens to all the water so sprayed? Having pulled this tanker to the end of the line how does it get transferred to the rear of the train and refilled in time for the return journey? 1. The water gets pumped out along with all the other water which accumulates in the tunnels. 2. The tanker is long and low so the driver can see over the top of it when returning - there could be a tanker at each end of the train and a large water-delivery pipe at each end of the journey, rather like some water-powered funiculars are re-charged. I didn't say it was elegant but I believe its simple, cheap and it would work - spray yourself with a mister and see how well it cools you. Cheerz, Baz |
#58
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"Andrew P Smith" wrote in message
... In article , Stuart writes Eh? how can water have a sell-by date. It's water, it doesn't go off. Wrong - it's bottled mineral water - they all have a sell/use by date. The sell-by date is determined by the contamination of the water by the plastic container. -- Terry Harper, Web Co-ordinator, The Omnibus Society 75th Anniversary 2004, see http://www.omnibussoc.org/75th.htm E-mail: URL: http://www.terry.harper.btinternet.co.uk/ |
#59
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![]() Last summer we had crates of bottled water on the station for emergency use. Unfortunately when we thought we might need it a week or so ago, it was all past its Sell-By date. You could have just done a "Coca-Cola" emptied all the bottles and filled them with tap water from Kent. |
#60
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David Walters wrote in message . ..
Might be an even better idea if they had some free water fountains on each platform. It wouldn't be allowed by H&S. Why not? One of the things I like about The US is in most public places their will be a water fountain. If they can handle it why can't we? Don't you remember that Quincy episode where someone dumped some bad food into a sink and it got siphoned unnoticed into the water fountains, causing botulism ? Having seen the inside of some LUL washrooms, I wouldn't like to drink from a tap served by the same supply. Also, a drinking fountain would inevitably get gobbed in, ****ed in, or be treated as an ashtray or garbage receptacle. Presumably the Americans don't suffer from this sort of thing. Water would have to be in sealed containers. Why is it different from the tap in the corner of my office? Your office is in a controled environment, and doesn't have unknown unwashed people visiting it for 21h a day. Richard [in PO7] |
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