EV are they worth it?

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That's very interesting. I was vaguely aware of the Chinese funding (is it Geely?) - but the links with the XC90 is news to me. Actually, as favour I drove a neighbour's XC90 to some street parking when he was having his drive resurfaced - he was abroad at the time. It may not be reasonable to form any firm opinions on a 5 minute drive from cold but it did seem to be a pretty ratly vehicle - the engine sounded like a cement mixer. It was a 2010 model, so fairly old. So maybe Volvo have upped their game on this model? Anyway, it looks as if they will be one of the first manufacturers to totally ditch ICEs.

Yes, Geely. They also own Lotus.
 
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People think I hate EV, but I don't. I hate bad products and bad merchants. Lithium batteries are bad in every way because they have so many ways to fail and ignite. EV sellers/makers are bad merchants because they are aware of the problem and using it as a ploy to increase business. First, they want to get ICE banned to sell more EV's. Then they will get EV's banned because those are unsafe. After they will force feed people with dynamite based engine tech, etc. The unsafe aspect is what caused them to be gleeful.

If there is viable non-lithium battery technology, I think EV will be OK, but not great because electricity is a less efficient form of energy compared other types such as petrol.

For EV owners, more they see how EV's burn, the better they are prepared to deal with the problem. This is where I come in. Here's one burning out a house. I reckon EV's should have fire-proof fire alarms built in, to alert the surroundings.

 
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Strange coming from a gas man. Electricity is 3x the price of gas for a reason.

There's no getting through to terminally stupid people, so I really don't know why I'm even trying but...

Let's supposing you have several "bags" of "energy". They all contain the same amount of energy. One has petrol in it, another has diesel, another gas, another electricity, another coal...

Do whatever you like with them, but the bag of electricity, put into a battery, will push a car further than any of the others. It will push it about 3x as far as the bag full of diesel. for example. Hell, you can even put the diesel into a generator, use the generator to charge an EV, and it will STILL go further than if you'd just put the diesel in the tank of an equivalent diesel car!
 
Let's supposing you have several "bags" of "energy".
The electricity bag would be the size of an EV battery. The petrol bag would be the size of a petrol tank. The petrol bag would be lighter and have longer range. Also the petrol bag can be topped up in 10 minutes. The electricity bag can't. Lastly, the electricity bag can ignite suddenly with no intervention.
 
The electricity bag would be the size of an EV battery. The petrol bag would be the size of a petrol tank. The petrol bag would be lighter and have longer range. Also the petrol bag can be topped up in 10 minutes. The electricity bag can't. Lastly, the electricity bag can ignite suddenly with no intervention.

Er... no. I knew I was wasting my time...

The bags all contain the same amount of energy. It doesn't matter what size they are, for the purpose of this exercise, as long as they contain the same amount of energy. If you want to make the petrol one the size of a petrol tank, that's fine, but then the electricity one would have enough to fill about half a dozen EV batteries.
 
Er... no. I knew I was wasting my time...

The bags all contain the same amount of energy. It doesn't matter what size they are, for the purpose of this exercise, as long as they contain the same amount of energy. If you want to make the petrol one the size of a petrol tank, that's fine, but then the electricity one would have enough to fill about half a dozen EV batteries.
Yes, you are definitely wasting your time because you don't understand different energy storage types have different energy densities. The reason petrol was chosen was because it had very high energy density per unit of weight and volume. Nothing is better at comparable cost of manufacture. Batteries are poor because they have low energy density. This is why EV's are heavy and have short range. Add to its troubles, battery based energy cannot be replenished quickly. Further trouble with lithium batteries is they catch fire from numerous mundane environmental factors.
 
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Electricity is derived from one of the above energy types. During this conversion, part of the original energy is lost. For example a diesel generator will produce 22.5 MJ of energy (my random estimate) from 1kg of diesel fuel. Where as if the diesel is used directly in an engine, 35-40MJ (my random estimate) of energy is realised from 1 kg of diesel.
 
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Yes, you are definitely wasting your time because you don't understand different energy types have different energy densities.

Er... no. :rolleyes: How does an energy "type" have an energy "density"? Energy is energy, I'm afraid. It's measured in Joules. It doesn't matter what form it takes. You're asking one of those "is a pound of lead heavier than a pound of feathers?" questions.

The reason petrol was chosen was because it had very high energy density per unit of weight.

Energy density "per unit of weight", eh? Go on then, put some units on it...

Nothing is better at comparable cost of manufacture.

Again, put some numbers on it. How much does it cost to produce (say) the amount of petrol that contains 1 MJ of energy and how much does it cost to produce 1 MJ of electricity?

Batteries are poor because they have low energy density.

Er... No. The battery is not the fuel. The battery is the fuel tank. Electricity is the fuel.

This is why EV's are heavy and have short range. Add to its troubles, battery based energy cannot be replenished quickly. Further trouble with lithium batteries is they catch fire from numerous mundane environmental factors.

The first part is true. The second is largely BS, but neither is relevant to your claim about electricity being a less efficient form of energy.
 
That's nice, but it seems to be missing "electricity"...
Electricity can only be derived from the listed energy types. This is why it is missing. During the derivation process, a large proportion of the original energy is lost to waste. Electricity will always be less efficient than the energy it is derived from.
 
Electricity can only be derived from the listed energy types.

Oh... right... So you can't get it from wind, then? or solar? or hydro-electric?

That's good to know... :rolleyes:

This is why it is missing. During the derivation process, a large proportion of the original energy is lost to waste. Electricity will always be less efficient than the energy it is derived from.

Well first of all, if you're getting it from renewables, it doesn't really matter how much is "wasted", does it? Secondly, you re, of course, factoring-in the power (funny enough, often electrical power) that is used to extract, transport, refine, and distribute fossil fuels... aren't you...?;)
 
Oh... right... So you can't get it from wind, then? or solar? or hydro-electric?
No, you can't. There is no hydro power in the UK. Wind generation comes and goes. The generation barely covers the maintenance for the turbines. Solar produces no power at least 50% of the year. Of that 50%, power is generated only during the day some of the time. This is incompatible with the need for power during the night when most of the EV's are charging.

Well first of all, if you're getting it from renewables, it doesn't really matter how much is "wasted", does it?
It does. Sun energy not reaching the ground/bricks and wasted results in greater need for heating for homes and buildings. Waste means higher demand for electricity.

Secondly, you re, of course, factoring-in the power (funny enough, often electrical power) that is used to extract, transport, refine, and distribute fossil fuels... aren't you...?;)
Yes, the market factored these in, resulting in petrol and diesel being the most efficient fuel-based energies for cars. If the diesel is used for generating electricity for EV's, part of the energy in the diesel is lost to waste. There is less waste if the diesel is used for powering cars directly.
 
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