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| the dark side of cobalt |
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| tom66:
--- Quote from: Siwastaja on July 12, 2023, 05:48:51 am --- --- Quote from: vad on July 11, 2023, 07:06:22 pm ---Forget lithium-ion batteries; their energy density is laughable. --- End quote --- I don't know if that was an ironic comment or not, but you realize the the energy density of current li-ion, already exceeding 300Wh/kg at cell level, is just fine for wheel-based mobility? It's not like it's making electric vehicles significantly heavier anymore. Of course new improvements are welcomed, but their importance is dropping. I remember the analytical discussions from 2009 or something when the conclusion was that energy density needs to double and cost needs to halve. From 150Wh/kg to 300Wh/kg, that's what happened except the cost is at one quarter from around $400/kWh to around $100/kWh (even better inflation-adjusted actually). It was a gradual breakthrough with no any single big jump, but small improvements accumulating. --- End quote --- Indeed. You can see this in the cost of electric vehicles too. In 2011, a Nissan Leaf cost £21,500 and came with a 24kWh battery and 80kW motor. In real terms, that's £30,207, but that didn't even include the battery, you had to lease it at up to £150 per month depending on your mileage. Today, you can get for £27,000, so less in inflationary terms, a Peugeot e-208 with a 50kWh battery and 150kW motor. You would own the car outright if you paid that much, there's no battery leasing option. So battery capacity has doubled whilst price has fallen. e-208 weighs 1530kg and Leaf 24kWh weighs 1505kg. Battery capacity double but the vehicles weigh almost the same unladen. |
| PlainName:
--- Quote from: Infraviolet on July 12, 2023, 05:33:40 am ---Nuclear fission power can't be throttled back easily, it runs at close to full power all the time --- End quote --- Are you sure? Perhaps you mean it can't be throttled quickly? edit: A widespread misconception |
| connectTek:
Totally agree. 0.03% is the amount of CO2 in the atmosphere and we contribute 3% of that ,Apparently. A poofteenth of a poofteenth. Global warming is a scam. That's why it's now called "climate change", of which it has been changing since the earth began, 4+ billion years before man was here. |
| connectTek:
And water vapour, ,Clouds, is 1000 time worse than CO2, Let's ban water! |
| Siwastaja:
--- Quote from: PlainName on July 12, 2023, 08:15:53 am --- --- Quote from: Infraviolet on July 12, 2023, 05:33:40 am ---Nuclear fission power can't be throttled back easily, it runs at close to full power all the time --- End quote --- Are you sure? Perhaps you mean it can't be throttled quickly? --- End quote --- Yeah, it can be throttled just fine, always could. Why it usually wasn't is because during the old days of smaller changes in electricity pricing, running at less than full power simply means all the costs that are constant per lifetime or constant per operational hour make each MWh produced more expensive. Only the fuel cost really scales down with power, and fuel cost is insignificant compared to everything else. Nowadays with larger price fluctuations, including negative prices, nuclear is throttled more than ever. It's a financial disaster, but throttling manages the disaster from becoming even bigger. |
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