T
Trevor Wilson
Guest
On 2/04/2017 4:51 AM, Benderthe.evilrobot wrote:
**Duh. No one ever claimed that an electric car was completely benign.
It is, however, significantly cleaner than an equivalent petrol or
Diesel car, even when powered by coal-fired power. That said, Tesla have
promised to obtain all their electricity from renewable sources for
their free charging stations. And, as I stated, for many city dwellers,
any electric vehicle will emit significantly less CO2 (via a coal-fired
power station) under day to day use. For long distance driving, the
benefits will be less obvious.
**Cites please.
--
Trevor Wilson
www.rageaudio.com.au
"Trevor Wilson" <trevor@SPAMBLOCKrageaudio.com.au> wrote in message
news:ek881dFj6o5U1@mid.individual.net...
On 1/04/2017 5:25 AM, Benderthe.evilrobot wrote:
"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ek5n0uF3vscU2@mid.individual.net...
On 31/03/2017 11:31 AM, Trevor Wilson wrote:
On 31/03/2017 11:10 AM, Sylvia Else wrote:
On 31/03/2017 9:22 AM, Trevor Wilson wrote:
On 31/03/2017 9:17 AM, Sylvia Else wrote:
On 31/03/2017 7:21 AM, Benderthe.evilrobot wrote:
"Sylvia Else" <sylvia@not.at.this.address> wrote in message
news:ejp7o7Fj307U1@mid.individual.net...
I wish they'd advertise it better, so that I can ignore it
deliberately.
Is that an Australian thing? - Never heard of it here in the UK.
It was started here, to our shame, but it got picked up in a
number of
other countries.
Showing support by turning off efficient lighting, and burning
inefficient CO2 emitting candles instead, is a common theme.
Earth hour is, above all, a demonstration of ignorance.
**Well, not really. It was designed to make people aware of the
problems
this planet faces and that we ALL need to work together to make a
difference. Certainly, turning off pool pumps (or filling in a pool,
like I did), or air conditioners will make several orders of
magnitude
more impact on the environment than turning off some LED
lighting, but
lighting is easy to see.
Whatever the intent behind it, all it's managed to demonstrate is
that
people have little understanding of the issues.
**How do you know?
Because if they did, they're realise that burning candles is not the
way to show support.
Most people don't even think about all electric cars mostly still
require burning fossil fuel to generate the electricity in the first
place - countries with coal fired power stations didn't win much at all.
**Probably more than you think. Electric cars have some major
advantages over IC cars. Including:
* Maximum toque at zero RPM.
* Around 90%+ efficiency at ALL RPM figures. My last couple of cars
were fitted with fuel consumption computers. When cold, the car
consumed around 20L/100km on flat ground, with moderate throttle
opening. When warm, that figure fell to around 6L/100km. An electric
vehicle consumes the same amount, regardless of temperature (within
obvious limits). No warm-up is required. Since many city vehicles are
operated over short trips, fuel efficiency can be spectacularly bad.
Long trips suit IC engines quite well.
* Regenerative braking. This is the big one and particularly for city
drivers. As much as 60% of the energy which would be otherwise wasted
as heat, can be used to recharge the batteries.
All of which demonstrates the the average fuel economy of an electric
vehicle can be quite low, in terms of CO2 production/km. That said,
for me, if I had an electric vehicle, I could easily meet my transport
needs by using an array of PV cells on the roof of my garage. Thus the
total nett CO2 contribution would be zero. YMMV.
I know all those advantages exist - but it still burns *SOME* fossil
fuel unless its nuclear or renewable.
**Duh. No one ever claimed that an electric car was completely benign.
It is, however, significantly cleaner than an equivalent petrol or
Diesel car, even when powered by coal-fired power. That said, Tesla have
promised to obtain all their electricity from renewable sources for
their free charging stations. And, as I stated, for many city dwellers,
any electric vehicle will emit significantly less CO2 (via a coal-fired
power station) under day to day use. For long distance driving, the
benefits will be less obvious.
The UK government has cancelled all subsidies for renewables - we're
going to buy French generators and pay the Chinese to build the power
station and handle our sensitive strategic materials.
**Cites please.
--
Trevor Wilson
www.rageaudio.com.au