Question - why is the Central Line so warm?

rick_chasey

OK, now I understand many of you guys are not in London, nor are the ones who do likely to use the tube frequently.

However, enough cumulative brainpower/knowledge could be the solution.

So - why is the Central Line so warm, and why is it usually warmer than other lines?

I understood heat generally was generated underground through a) having a lot of people and b) heat coming from the brakes to stop the trains.

However, if that were the case, it wouldn't explain why the central line is so consistently hot, even when it's not busy, and why it so much wamer than other lines, which have a similar amount of people using it and, ostensibly similar train/braking technology.

Any ideas?

random man

Possibly because it's in the middle of the system and does not get the cool air from overground lines entering it?
I don't know, but I've noticed the same thing when I've used the Underground.

Stewie Griffin

It's so deep underground that you are close to magma.

daviesee

Closer to the centre of Hell?

Harry B

It probably is to do with the depth of it and the fact that it gets little fresh air. It underground all the way from White City to god knows where in east London.

Whatever the reason its uncomfortable enough to get me to use my bike instead

rick_chasey

You say depth - I thought the Northern line was deeper?

markos1963

Correct me if i'm wrong but doesn't temperature go up 1c per 70 feet descended?

rick_chasey

markos1963 wrote:

Correct me if i'm wrong but doesn't temperature go up 1c per 70 feet descended?

I have no idea but I doubt the depths the tube goes make much difference.

Zoomer37

Perhaps they just turn the heating up to make people even more miserable. If thats possible.

One Man And His Bike

Someone snapped the knob off of the radiator so it's stuck on "roast you alive" setting?

Ben6899

Northern line is the deepest I think. The lift at Hampstead is 55.2m!

My guess would be:

1. volume of trains - more trains = more braking = more heat
2. volume of people farting and breathing and talking bollox
3. lack of overground stations

An interesting page:
http://www.tfl.gov.uk/corporate/modesoftransport/londonunderground/1608.aspx

And a piece from the Daily Mail, which backs up Rick's observations
http://www.dailymail.co.uk/news/article-1208723/Cooking-Central-Line--map-shows-hot-spots-London-Underground-unfit-transporting-cattle.html

edhornby

air doesn't circulate because of the depth and the volume of the trains constantly displacing the static air system heats it up

the trains moving through the tunnels act like leaky pistons - when they build up pressure, the energy is dissapated as heat

cornerblock

Is it because it's the red one! :?

-spider-

Is another name for the Central Line not the equator?

pneumatic

Farts

freehub

Global warming.

deptfordmarmoset

I like to sleep in the warm.

Gypsum_Fantastic

pneumatic wrote:

Farts

freehub wrote:

Global warming.

Nope you're both wrong - it's the fault of wiggle

freehub

I'm partly correct then Wiggle has caused global warming.

-spider-

This is just a lot of hot air.