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chiitoday at 11:59 AM2 repliesview on HN

> make synthetic fossil fuels from atmospheric CO2.

that would actually be my preferred solution (if only it was less energy inefficient, sigh).


Replies

elzbardicotoday at 12:44 PM

If the marginal value of electricity is negative, what matters if it is energy inefficient?

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chithanhtoday at 2:35 PM

The problem here is that the production of hydrocarbons, ammonia, etc. from electricity can only make back its high upfront investment when it runs basically 24/7. This is a challenge for renewables.

In China which recently opened a large off-grid green ammonia plant in Chifeng, they use multiple tiers of energy storage to ensure constant electric power availability.