Home |
Search |
Today's Posts |
![]() |
|
London Transport (uk.transport.london) Discussion of all forms of transport in London. |
Reply |
|
|
LinkBack | Thread Tools | Display Modes |
#1
![]() |
|||
|
|||
![]()
Hi all,
Drains in varous London roads were emitting clouds of steam tonight. Why tonight, when they don't normally do this? -- John Rowland - Spamtrapped Transport Plans for the London Area, updated 2001 http://www.geocities.com/Athens/Acro...69/tpftla.html A man's vehicle is a symbol of his manhood. That's why my vehicle's the Piccadilly Line - It's the size of a county and it comes every two and a half minutes |
#2
![]() |
|||
|
|||
![]()
John Rowland:
Drains in varous London roads were emitting clouds of steam tonight. Why tonight, when they don't normally do this? Cleaning time? http://www.snopes.com/humor/iftrue/cleaning.htm Does London have a system of steam mains that provide winter heating to various buildings, as some cities do? -- Mark Brader | "...most people who borrow over $1,000,000 from a bank Toronto | would at least remember the name of the bank." | -- Judge Donald Bowman, Tax Court of Canada |
#3
![]() |
|||
|
|||
![]()
On Fri, 18 Nov 2005 03:04:19 -0000,
John Rowland wrote in : Drains in varous London roads were emitting clouds of steam tonight. Why tonight, when they don't normally do this? The weather. I imagine the air would have been close to 100% relative humidity -- the cooler the air the less water vapour it can carry, so cooled air tends towards its saturation point. However, the air immediately above a quantity of water is essentially saturated (100% r.h.) at the temperature of the water. Say the water in the drains was still at 15 C while the air was 0 C[1]; the partial pressure of water vapour in the outside air would be 4.6 mmHg, that in the drain 12.8 mmHg. Any movement of the air from the drain to the outside would cool the air to super- saturation, and the excess water would form droplets, visible as steam. http://hyperphysics.phy-astr.gsu.edu...watvap.html#c1 [1] It's -3 C here at the moment; got to 0 C around 10 or 11 last night. -- Ivan Reid, Electronic & Computer Engineering, ___ CMS Collaboration, Brunel University. ] Room 40-1-B12, CERN KotPT -- "for stupidity above and beyond the call of duty". |
#4
![]() |
|||
|
|||
![]()
On Fri, 18 Nov 2005 05:16:23 -0000, (Mark Brader) wrote:
Does London have a system of steam mains that provide winter heating to various buildings, as some cities do? There was hydraulic power until quite recently. http://www.subbrit.org.uk/sb-sites/s...on/index.shtml Battersea Power Station used to pipe hot water under the Thames to provide heating to Dolphin Square and Pimlico. But I don't know of any large-scale steam system. New York has one. |
#5
![]() |
|||
|
|||
![]()
John Rowland wrote:
Drains in varous London roads were emitting clouds of steam tonight. Why tonight, when they don't normally do this? Presumably because it was cold, and the contents of the drains were warmer. It was *condensing water vapour* rather than steam, and doesn't need to be nearly so hot. Steam, FWIW, is as invisible as the rest of the air. -- http://gallery120232.fotopic.net/p11654414.html (Over-powered? 143 566 on push-pull duty at Birkenwirder, Berlin, 1999) |
#6
![]() |
|||
|
|||
![]()
Laurence Payne writes:
There was hydraulic power until quite recently. We know that! Battersea Power Station used to pipe hot water under the Thames to provide heating to Dolphin Square and Pimlico. But I don't know of any large-scale steam system. I see. -- Mark Brader, Toronto "Let us knot coin gnu werds huitch are spelld rong." -- Rik Fischer Smoody |
#7
![]() |
|||
|
|||
![]()
In message , John Rowland
writes Drains in varous London roads were emitting clouds of steam tonight. Why tonight, when they don't normally do this? Around 10 this morning I noticed a steaming drain in the middle of the King's Road near the M&S, and shortly afterward clouds of vapour rising off the Thames near Chelsea Harbour. -- congokid Good restaurants in London? Read my tips... http://congokid.com |
#8
![]() |
|||
|
|||
![]()
On Sun, 20 Nov 2005, congokid wrote:
In message , John Rowland writes Drains in varous London roads were emitting clouds of steam tonight. Why tonight, when they don't normally do this? Around 10 this morning I noticed a steaming drain in the middle of the King's Road near the M&S, and shortly afterward clouds of vapour rising off the Thames near Chelsea Harbour. Is this anything to do with the new series of Doctor Who? tom -- BUTTS LOL |
#9
![]() |
|||
|
|||
![]() Laurence Payne wrote: Battersea Power Station used to pipe hot water under the Thames to provide heating to Dolphin Square and Pimlico. When the station closed thiis was replaced by a coal-fired boiler house between the power station and the railway. This was later converted to 'dual', I assume gas and oil, firing according to its sign. Quite recently this was demolished, does anyone know what has now replaced it? But I don't know of any large-scale steam system. New York has one. Many New York drains seem to be steaming, whatever the weather. They also have strange orange and white 'barber's pole' striped chimneys, for want of a better word, maybe two metres high, which can be seen sticking up in the middle of the road. They look quite temporary. I've also seen large, cylinders of liqiid gas, Nitrogen I think, on street corners, chained to a pole of some sort, with the gas being piped underground. I think this was being done by Verizon (telephones), so pipe freezing doesn't seem likely. Any ideas? |
Reply |
|
Thread Tools | Search this Thread |
Display Modes | |
|
|
![]() |
||||
Thread | Forum | |||
Steaming from Olympia to Moorgate | London Transport | |||
Feral Gang Steaming Heathrow Connect | London Transport | |||
Drains on Red Routes | London Transport |