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Electric vehicles/Fossil fuel powered: Difference between revisions
Electric vehicles/Fossil fuel powered (view source)
Revision as of 01:11, 22 January 2023
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''For natural gas power plants'': | ''For natural gas power plants'': | ||
Some have the same efficiency as coal power plants (33%). | Some have the same efficiency as coal power plants (33%). Results would be about the same as above. | ||
''Other'' natural gas power plants (the more advanced "combined-cycle" type) are more efficient: up to 60%: | |||
{{dp | {{dp | ||
|<nowiki>natural_gas_combined_cycle_power_plant.efficiency</nowiki> | |<nowiki>natural_gas_combined_cycle_power_plant.efficiency</nowiki> | ||
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In this case (electric car + advanced natural gas power), we do in fact cut our emissions in half. | In this case (electric car + advanced natural gas power), we do in fact cut our emissions in half. But this doesn't apply to older, simpler natural gas power plants. | ||
<small>A note on precision: {{x|In theory, coal and natural gas have different GHG emissions per unit energy (which we didn't factor in, and maybe we should for best precision). But in practice, they're about the same, due to [[natural gas#fugitive emissions]]. Both are close enough to gasoline, for the purpose of the calculations above.}}</small> | <small>A note on precision: {{x|In theory, coal and natural gas have different GHG emissions per unit energy (which we didn't factor in, and maybe we should for best precision). But in practice, they're about the same, due to [[natural gas#fugitive emissions]]. Both are close enough to gasoline, for the purpose of the calculations above.}}</small> | ||
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But so far, we still haven't counted the environmental impact of ''making'' an electric car, which is significantly more than for a gasoline-powered car.{{qn}} | But so far, we still haven't counted the environmental impact of ''making'' an electric car, which is significantly more than for a gasoline-powered car.{{qn}} | ||
* Note: This varies by the ''type'' of batteries used.<!-- TODO: bring in data from other pages?: energy to manufacture batteries; minerals involved --> | |||
When that's factored in, there's probably no benefit to having an electric car in the coal-power scenario, and only ''moderate'' benefit in the advanced-natural-gas-power scenario. | When that's factored in, there's probably no benefit to having an electric car in the coal-power scenario, and only ''moderate'' benefit in the advanced-natural-gas-power scenario. | ||
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TALK: add scenario where vehicles are powered by hydrogen gas made from fossil fuels? | |||
or should that go elsewhere? | |||
--> | |||
==See also== | ==See also== | ||
* [[Calc:If all vehicles were electric]] | |||
* [[Public transit]] | * [[Public transit]] | ||
* [[Walkability]] | * [[Walkability]] | ||