Do Londoners dream of electric buses? • Hacker News Board

Re: Do Londoners dream of electric buses?

#31

Post by SaltyBackendGuy » Tue, Jun 26, 2018, 2:46 PM UTC

jeffwass wrote: post #14

nothrabannosir wrote: post #8

> Londoners might not dream of electric buses, … Every single cyclist dreams of electric busses, believe you me. Huffing nitrogen stationary-bus-fart oxides turns any public road here straight into an express lane to lung cancer, without even the courtesy of a nicotine rush. I laugh when people say cycling is healthy. Not in London. Nooo sir. Between the long term certainty of whatever smokers like to aim for, and th…

As a London pedestrian I am fully in favour of electric buses. The NoX fumes are horrible for pedestrians too. Especially when the buses are stacked one after another, idling. I seriously can’t believe the government refuses to act on the diesel disaster. Tens of thousands of people die from diesel exhaust complications per year, but they don’t care.

This reminds me of 'dieselgate'[0], it's not just buses. One does wonder why the government hasen't acted on a diesel ban (or some action) when it's clearly a risk to the public.

[0]https://en.wikipedia.org/wiki/Volkswagen_emissions_scandal

Re: Do Londoners dream of electric buses?

#32

Post by superqwert » Tue, Jun 26, 2018, 2:46 PM UTC

_ea1k wrote: post #27

superqwert wrote: post #26

Earlier quoted context omitted.

About half of pollutants come from brakes and tyres - http://publications.jrc.ec.europa.eu/repository/bitstream/JR... Bringing in electric buses will not decrease these pollutants. They will also not remove enough of the other half of the pollutants. The change needs to be far wider and harsher.

well, the regenerative braking will reduce brake dust a bit. Certainly not completely, but its a start.

how will they reduce braking dust? I thought they were primarily only going to use the brake power for energy.

Re: Do Londoners dream of electric buses?

#33

Post by bloak » Tue, Jun 26, 2018, 2:55 PM UTC

superqwert wrote: post #26

nothrabannosir wrote: post #8

> Londoners might not dream of electric buses, … Every single cyclist dreams of electric busses, believe you me. Huffing nitrogen stationary-bus-fart oxides turns any public road here straight into an express lane to lung cancer, without even the courtesy of a nicotine rush. I laugh when people say cycling is healthy. Not in London. Nooo sir. Between the long term certainty of whatever smokers like to aim for, and th…

About half of pollutants come from brakes and tyres - http://publications.jrc.ec.europa.eu/repository/bitstream/JR... Bringing in electric buses will not decrease these pollutants. They will also not remove enough of the other half of the pollutants. The change needs to be far wider and harsher.

s/About half of pollutants/About half of PM10/

Re: Do Londoners dream of electric buses?

#34

Post by Tepix » Tue, Jun 26, 2018, 2:55 PM UTC

superqwert wrote: post #32

_ea1k wrote: post #27

Earlier quoted context omitted.

well, the regenerative braking will reduce brake dust a bit. Certainly not completely, but its a start.

how will they reduce braking dust? I thought they were primarily only going to use the brake power for energy.

Using the engine for braking means the physical brake will not be used, so there will be no dust in that case.

Re: Do Londoners dream of electric buses?

#35

Post by adrianN » Tue, Jun 26, 2018, 2:55 PM UTC

superqwert wrote: post #32

_ea1k wrote: post #27

Earlier quoted context omitted.

well, the regenerative braking will reduce brake dust a bit. Certainly not completely, but its a start.

how will they reduce braking dust? I thought they were primarily only going to use the brake power for energy.

You need your braking pads less when you convert the kinetic energy in electricity.

Re: Do Londoners dream of electric buses?

#36

Post by rjmunro » Tue, Jun 26, 2018, 2:57 PM UTC

superqwert wrote: post #32

_ea1k wrote: post #27

Earlier quoted context omitted.

well, the regenerative braking will reduce brake dust a bit. Certainly not completely, but its a start.

how will they reduce braking dust? I thought they were primarily only going to use the brake power for energy.

Braking dust comes from brake pads rubbing against brake disks. Electric vehicles slow down by running the motor in reverse and recharging the battery, therefore don't use the brake pads and brake disks as much, especially at higher speeds where the brake dust problem is the worst.

Re: Do Londoners dream of electric buses?

#37

Post by Tepix » Tue, Jun 26, 2018, 2:57 PM UTC

DanBC wrote: post #20

tom_ wrote: post #3

Most interesting part of the article for me: > and being of considerable utility, they are remarkably undamaged. It seems that sticking chewing gum in things only applies when the vandal feels they wont personally lose out (assuming this is actually true, and not another in a long local tradition of overly rose-tinted journalistic views of our grim North Sea shithole)

I was surprised that they felt USB charging is a feature. We've had that, and WIFI, on some diesel buses in Gloucestershire for a while. USB charge points under the seats tend to be more broken - accidentally kicked.

Wireless chargers would be a nice vandalism-proof option. But slower of course.

Re: Do Londoners dream of electric buses?

#38

Post by JumpCrisscross » Tue, Jun 26, 2018, 2:57 PM UTC

superqwert wrote: post #32

_ea1k wrote: post #27

Earlier quoted context omitted.

well, the regenerative braking will reduce brake dust a bit. Certainly not completely, but its a start.

how will they reduce braking dust? I thought they were primarily only going to use the brake power for energy.

> how will they reduce braking dust?

"In urban environments, brake wear can contribute up to 55 % by mass to total non-exhaust traffic-related PM10 emissions" [1]. (The "abrasion processes which result in direct particulate matter (PM) emission are tyre, brake, clutch and road surface wear, with other potential sources being engine wear, abrasion of wheel bearings and corrosion of other vehicle components, street furniture and crash barriers.")

When a vehicle regeneratively brakes, the brakes aren't engaged. Instead, the transmission connects to a generator, which resists the vehicle's motion as it converts kinetic energy into electricity.

[1] https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4315878/

Re: Do Londoners dream of electric buses?

#39

Post by mcjiggerlog » Tue, Jun 26, 2018, 2:57 PM UTC

1ba9115454 wrote: post #4

tom_ wrote: post #3

Most interesting part of the article for me: > and being of considerable utility, they are remarkably undamaged. It seems that sticking chewing gum in things only applies when the vandal feels they wont personally lose out (assuming this is actually true, and not another in a long local tradition of overly rose-tinted journalistic views of our grim North Sea shithole)

- grim North Sea shithole Spend some time in other coutries and you'll yearn to return. Trust me.

Over 3 years in Spain and no plans to return to Brexitlandia.

The UK has it's good points, but better quality of life can be found elsewhere.

Re: Do Londoners dream of electric buses?

#40

Post by ivl » Tue, Jun 26, 2018, 2:57 PM UTC

superqwert wrote: post #32

_ea1k wrote: post #27

Earlier quoted context omitted.

well, the regenerative braking will reduce brake dust a bit. Certainly not completely, but its a start.

how will they reduce braking dust? I thought they were primarily only going to use the brake power for energy.

Regenerative braking is using the electric motor as a generator for a time during braking. So you're not dealing with pads and rotors wearing down, at least not as much.