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originally posted by: rkingpin
Every car on the planet has the potential to contribute to the national grid or just power their own devices? If a generator (with rechargable) battery is fitted into a car, the spin on the wheels (all four) could be used to generate electricty (converted from kinetic energy powered by petrol/diesel). Then when you got back home hook up the generator to your house to transer the power you generated to your houses, battery or the grid.
Because:
originally posted by: Cuervo
Why don't we pack our cars full of lightweight batteries to store surplus energy to then off-load onto our home grids?
originally posted by: greencmp
a reply to: rkingpin
Conservation of energy.
originally posted by: Arbitrageur
Because:
originally posted by: Cuervo
Why don't we pack our cars full of lightweight batteries to store surplus energy to then off-load onto our home grids?
1. There are no such batteries even if there was a surplus, and
2. There isn't a surplus
Gasoline operated cars do use perhaps 4 times the energy needed to propel them, but that's not a surplus. The other 75% are in losses, mostly in the form of excess heat, and a little bit in the form of sound (road noise from the tires). Electric motors seem more efficient but they probably aren't if you look at the overall cycle of how the electricity is generated, which in the US a large amount is from coal and that process of generating electricity has a lot of losses.
There are cars that recover energy from braking already as rickymouse said. That's about the best we can do directly related to the OP idea. For many of us who don't check our tire pressure often, merely checking and adjusting the tire pressure to the recommended amount can help fuel efficiency.
originally posted by: theantediluvian
The upshot is to generate more electrical energy to charge more batteries the engine would need to burn more gasoline. It would be more efficient to just burn the gasoline in an electrical generator designed to do this task as efficiently as possible.
Conservation of energy.
originally posted by: artistpoet
a
That law has been broken in experiments ...
originally posted by: artistpoet
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originally posted by: artistpoet
Yes of course as is the Earth ... maybe my lack of knowledge is a stumbling block ... But if it says that energy is always what it is ... then the Universe has worked out a pretty good way to expand that energy ... not being awkward ... just curious ...