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David Abbott's avatar

One thing the article left out: not much power is lost in transmission when high voltage lines are used, less than 10%. I was concerned about how much power would be lost in transmission had to google to find that.

I recall being taught in 8th grade science that 20% of power is lost in transmission, which made me think that transmitting from the windy plains to the lower Midwest or Northeast would be monstrously inefficient. The current figure is about half of that. Furthermore, loss is proportional to the inverse square of voltage times distance, so you can lose more power on a dozen miles of low voltage line than 200 miles of high voltage line.

This is a basic fact which practical people should know, akin to how many miles a ton of rail freight can travel using a gallon of fuel.

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Michael S's avatar

Geothermal is also a great untapped source of lithium; major expansion of geothermal drilling could be a huge benefit to the domestic lithium production for batteries.

For context, NREL says that at the Salton Sea geothermal plants in CA, 24k metric tons of lithium pass through annually in the hot geothermal brines. That’s about 30% of global lithium production. Extracting it is profitable at LCE prices of $11/kg compared to the average 2019 price $12.70. It’s very sustainable because heat and energy to purify the lithium are available from the geothermal plant. What’s more this is a fairly under-researched field so efficiency can go up a lot. GM is excited about this and recently announced a deal to source a lot of their lithium for automotive batteries from CA geothermal projects.

NREL report https://www.nrel.gov/docs/fy21osti/79178.pdf

GE announcement https://www.reuters.com/business/autos-transportation/gm-shakes-up-lithium-industry-with-california-geothermal-project-2021-07-02/

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