Diesels for the chop

[Chris French]

There also the Bristol 'Poo Bus', which runs on Methane from human waste and food waste.

-the-road

[ARW]

How much energy does it take to move around these batteries?

[dennis]

You can get diesels that meet the pollution targets, hell you can even get taxis that do.

[dennis]

It burns cleaner, its been available for at least 10 years but it costs more so nobody does it.

[Dave Plowman (News)]

A nearby council - Merton - have been running LPG vehicles for many years. The dustcarts in particular appear to produce little in the way of noxious fumes. Presumably originally for the safety of those working behind them all day. The engines are also considerably quieter than diesel, so good for residents too. IIRC, an LPG vehicle with catalytic convertor produces near zero pollutants, other than CO2. Other side benefit is the LPG is likely more difficult to steal than either diesel or petrol.

[Dave Plowman (News)]

All they do is meet the standard at that point in time - ie when measured. Collect all the emissions from that vehicle over a period of time and average it out and they would fail big time.

[Tim Streater]

I would imagine that with a lower energy density the range is reduced but that probably doesn't matter for that type of application.

[The Natural Philosopher]

And still generates particulates which are 50% of the problem and NOx which is the other half.

QAnd will still generate nboth pariclautes and NOx.

The problem is to get efficiency you need very high temperature burning. That creates NOxx as a by product.

If you lower the combustion temps you don't get the efficiency and you can also get incomplete combustion which means particulates.

There is nothing special about diesel FUEL, its the compression ignition that is the key to diesel design and its efficiency.

Unfortunately unless you run on pure oxygen, NOx is an inevitable by product of diesel engines or indeed lean burn petrol engines.

[The Natural Philosopher]

Nox is hard.

Particulates just need a filter or cat to burn em up.

[Adrian]

The battery packs in a Tesla are somewhere around 560kg, apparently...

Or compare the weight of a hybrid with a non-hybrid version of the same car. About 400kg difference on a Mitsu Outlander, it seems.

[Dave Plowman (News)]

Which in practice don't work long term.

[Dave Plowman (News)]

And cost about $30,000 to replace, apparently...

[Adrian]

They do - unless the vehicle's used for the "wrong kind of use".

[DJC]

?7.90 here

[Andrew]

The last time London buses were on strike, Jeremy Clarkson obtained an official graph of pollution in central London, and without any buses on thr road, there was a dramatic decrease in pollution.

[Andrew]

The mad dash for 'bio diesel' all around the world is one of the reasons for escalating food prices as farmers were bribed to grow 'bio fuel' and not basic foodstuffs.

Millions who live on a dollar a day were badly affected by this.

[tony sayer]

To true Den, and anyone who drives thru London thru choice needs their head examining;!...

[tony sayer]

Bloody hell thats 4 and a half times my bulk!...

We just need that sealed for life nuclear power units thats suit case sized ... one day;)...

[Fredxxx]

You mean this is a way of reducing world population?

[Simon Brown]

But unless that produced uniquely low levels of pollution, it is much less clear if that was due to the strike or the weather.