Hotter Than The Sun!

I can't see how regen breaking is going to help that much. Each new train design comes packed with new electronics which which belt out heat. Schemes which allow more trains to run on the system contribute to the problem. Most of us know about the appalling conditions on the central line. The deep level tube is surrounded by clay which acts like a storage radiator. In 20 years time, I reckon the deep level tube will be largely unusable during summer. We need alternatives to the deep level tube. If you think of all the money that's been wasted by successive governments of the last 20 years, we could have had 2 or 3 more crossrails.

Nearly two years ago I (and several others on this forum) rode on a train on the 'Jubilee' and much comment was made about how pleasant the atmosphere was due to the revolutionary idea for cooling the passenger area. It was called opening windows and the train was the 1938 tube set from the LTM! Sometimes progress doesn't actually improve anything as much as it should.

As for alternatives to deep level tubes. Just where are they going to go then? Name me one idea that would move the sheer volume of people that the tube does day in, day out without causing major disruption to the lives of all in the capital!

One thing that has disturbed me is the number of times,in various contexts,I have read that power supplies are having to be upgraded to cope with the demands of new stock...now,call me silly,but surely unless the trains are being made substantially longer,they are doing the same job as the trains they replace,and with the much heralded super-efficient AC motors and lightweiht construction,should actually be using LESS power than the outdated and antiquated trains they replace?
Or have I missed something?
All this extra power will inevitably end up as heat,so it seems madness,given the problems rising temperatures are causing,and will continue to cause,to passengers and electronics,not to mention the environmental (and economic) cost of generation,that there isn't more of a premium placed on making new trains more frugal...

Old stock, with opening quarter-light windows, opening car-end windows and open ventilator grilles at the car ends, certainly ensured air movement. Even when it's hot, air movement gives a feeling of cooling. I think that passengers like this.

I envy you there

While we're on the matter, the video says the old Vic trains will be gone by Thurs (2 days time presumably). Does anyone know if regen braking will be operational on Fri or if there is a date which the upgrade team are working toward?

When I walked between Fin Pk and Euston a few months ago I was dripping with sweat, salt running into my eyes etc, the heat was incredible, despite taking water with me.

Yes Aliturk,that is also true.
And I take Charlie's point of more motors/more acceleration,but given the hole LT has dug itself into regarding overheating,perhaps top performance (in acceleration terms) needn't have been a priority when specifying the trains,with the concomitant benefit of cheaper build cost and lower power bills.
I personally would rather arrive 1.5 seconds later on my Finsbury Park to King's Cross journey,if it meant that it wasn't like an oven...
And,of course I understand this is an historic problem which is not solely due to trains' motoring,but action should be taken in all direction to reduce the problem.with the understanding that the answer may involve using less power across the board....

It's a fair bit more than 1.5s!

The capacity of the line has to be increased. To do this, with only slightly longer trains possible, you need to accelerate faster to clear platforms faster. The new signalling also increases the possible throughput, by several trains per hour.

The top speed has also been ever so slightly increased. Both combined, you can increase the capacity. Higher braking rates also!

The signalling is an important element of the upgrade project as it whilst being fixed-block has some interesting features, which ISTR the capacity is 33tph up from 27tph.

Assuming 661 people on a 67ts train (stock info sheet, max observed), you can shift 17,847 people across a certain point in an hour.

With 09s, the max observed is 734. 24,222 people - a HUGE increase, of 6,375 people! Especially if the 33tph can be achieved. It's not that long a run from Walthamstow to Brixton, so I reckon it could be easily achieved. If the passengers comply, 33tph won't be too bad.

That's the difference between 2m, 13.3s and 1m, 48.6s train frequencies. Higher convenience, and less overcrowding, assuming the same passenger numbers.

You'll need intake fans as well. Not forgetting the only tunnels going to surface are the two depot ones - not good propagation of cool air!

Which brings us back to the problem I was talking about - more trains, more people, more heat. Increasing capacity on these types of lines soon gets eaten up, as seen with the 7th car and 4 extra trains on the jubilee. Any extra capacity gets eaten up as the economy grows. Each person is giving off roughly the same amount of heat as a 100w bulb. There should be a plan for some serious, long term alternatives for getting people off the deep level tube, not getting more people on. These extra trains an hour will only benefit with perfect spacing between trains whatever the frequency, and on a system as complex as the tube, there is always something that upsets the frequency no matter how good computer systems are.

You'd have greenpeace RPGing the place or something. There's no way that could be anywhere near energy efficient. Groundwater cooling I would suggest!

Boris made some fuss about orbital bus routes when he was elected, but nothing has been done in that area. A shame, because I think they'd come in useful for leisure trips in particular, meaning that people in the outer boroughs wouldn't have to come into the centre to go back out again.

Even on cooler days, the Bakerloo is like an oven ....