No it isn't!
That's why solar and wind cause problems.
As the energy generated by them goes up and down you have to throttle
some other source of electricity to make sure you don't generate too much.
Variable demand also causes problems but its more predictable than
Actually that is only partially true. Generators can be turning, but
not actually being used to generate much if any power. As such they
will not consume much fuel or energy to keep them turning over. Once
they need to meet a demand, then they have to be fed with more
mechanical energy - just like your car's generator (alternator).
Generators do have to be turned for a while before they can be used to
generate. The turbines have to be spun and brought to temperature. The
turbine, has a solid connection to the generators. So the generators
can and do run, without doing any useful work.
Generation cannot be instantly turned on and off, it takes time to ramp
up and time to ramp down, which is why being able to accurately predict
demand is so important, so as to have generation running ready to meet
Once running, it is cheaper to keep them online, which is why we see
the price breaks of E7 etc..
So Brian was partially correct.
Strictly speaking, if a generator is rotating it must be generating
some power, even if that power is only utilised to power the station
As soon as a generator is running, up to temperature and in sync, it
will be placed on line. At which point adding more input power, it will
Strictly speaking you are wrong. It may be USING power (to overcome
heatlosses and bearing friction and to drive pumps) but it ain't
Which is correct but utterly contradicts your previous statement that it
was generating BEFORE you added mire input power or even got it in sync.
You can spin a dynamo or alternator forever but until you draw current,
it ain't generating anything more trhan whooshy over your head at 30000
"If you don’t read the news paper, you are un-informed. If you read the
news paper, you are mis-informed."
The Natural Philosopher laid this down on his screen :
Of course it is generating, what is driving the feed pumps?
Once in sync it has to either generate some electrical output, or
consume. It might be idling, but even at idle it outputs some power.
The volts are there.
Almost certainly the national grid
BUt lets face it, in order to generate as *you* define it, you just need
a pack of coal and a hearth..
Not feeding the grid but obviously 'generating'.
Which is why no one but you uses such a stupid definition of 'generating'
Oh dear. watts is volts times amps. If amps are zero power is zero.
There are volts in a battery sitting in a shelf,. How much power is it
Refresher course in basic electromagnetism ?
Microsoft : the best reason to go to Linux that ever existed.
On Mon, 20 Feb 2017 22:54:40 +0000, The Natural Philosopher
Yes, but they don't 'Generate' electricity (which I think is the point
Harry is making).
"In electricity generation, a generator is a device that converts
mechanical energy to electrical energy for use in an external
So, a battery would 'transform' chemical, into electrical energy,
which is not a 'mechanical' process.
I disagree with Harry on the idling generator 'generating' energy
though (when 'generating' would be taken as 'energy being released
outside of the / a closed system').
When I was racing EV's I would see my (permanent magnet, DC) motor
consume energy on the uphill bits and generate energy on the downhill
bits. On some of the bits in between it was still spinning in
proportion to the road speed but was only consuming it's background
(no load) current. On the slight downhill bits it consumed no power at
(Which is why it's said you should always let the engine be spun by
the decelerating car rather than coast and force the engine to
maintain idle itself, if you are looking for the best fuel economy).
Cheers, T i m
Hmm. If the engine is spinning at say 3000RPM surely that'll take more
energy than it would if you let it drop back to tickover.
Though I daresay there aren't many occasions when you really want that
maximum roll, and aren't braking down a hill or stopping.
Oh, its also a demonstration of the poor command of English that
remoaner people have.
Other things than those that are called 'generators', 'generate
electricity' As you have just pointed out.
T i m, being funadamentally brain damaged thinks that because all cows
have 4 legs, anything with 4 legs is a cow.
He also has trouble reading slogans on the side of buses.
"I am inclined to tell the truth and dislike people who lie consistently.
This makes me unfit for the company of people of a Left persuasion, and
On Tue, 21 Feb 2017 21:40:39 +0000, Vir Campestris
They are still a 'chemical' rather than 'mechanical' solution though
Yes, but not if your foot is off the throttle? ;-)
I think the idea was that some thought that to save fuel when they
were going to be coming to a halt, they would slip it into neutral
and cruse (on tickover), only stopping on the brakes (pre regen
However, if the engine is having to maintain tickover it's got more
throttle than if there is no demand for power and is being 'driven' by
the inertia of the car as it decelerates.
Not really ever tried to do that myself, just something I heard that I
found interesting. Strangely though, I think it might be better for a
2/ (tank mix especially) to idle than be spun at high revs with a
closed throttle (but for different reasons). ;-)
Cheers, T i m
I said energy, not fuel.
If your foot is off the throttle on any modern car the injectors will
have turned the fuel off.
It's your kinetic (or potential, on a hill) energy that is spinning that
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