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Cake day: June 11th, 2023

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  • This is sadly par for the course in green tech articles. Journalists who flunked high school sciences should not be reporting on this stuff, or at least consult with someone who has even a passing knowledge of physics.

    Now regarding actual storage amounts, I have noticed utilities seem to target around 4 hours of capacity at full discharge. That seems to be the sweet spot for lithium ion at least. So by that measure, 1 GW would translate to 4 GWh…ish.

    These battery farms are more about dealing with spikes in power demand than bulk energy storage. This is still a valuable role in that they can replace peaker plants which are often low-efficiency diesel monstrosities, but we still need something else for the latter application. Mechanical storage schemes like pumped hydro come up a lot in that discussion, though it’s possible something like flow batteries might be a better fit for this than lithium ion if you want to go the battery route?

    I’m not an expert on any of this though, so feel free to correct me.


  • Later that year Ravil Magonov, the chairman of Lukoil, an oil giant, died after falling out of the window of a Moscow hospital.

    I had to follow up on this part since they didn’t mention what caused his hospitalization in the first place. Did he fall out of his apartment first but it wasn’t high enough, so they sent him to the tallest hospital in Moscow?

    But no. He apparently suffered a heart attack. His window death was then deemed a suicide as it was known he was on antidepressants. Case closed. The suicide prevention unit at that hospital, I gather, is on the top floor with easy-to-open windows?


  • But the mining, milling, and production of nuclear fuel, as well as the construction and decommissioning of nuclear plants, emit greenhouse gases at levels ranging from 10 to 130 grams of carbon dioxide per kilowatt hour of power — lower than fossil fuels but higher than wind and hydroelectricity (and roughly on par with solar).

    That’s interesting. The article they link gives a bit more detail:

    These energy intensities translate into greenhouse gas intensities for LWR and HWR of between 10 and 130 g CO2-e/kWhel, with an average of 65 g CO2-e/kWhel.

    While these greenhouse gases are expectedly lower than those of fossil technologies (typically 600–1200 g CO2-e/kWhel), they are higher than reported figures for wind turbines and hydroelectricity (around 15–25 g CO2-e/kWhel) and in the order of, or slightly lower than, solar photovoltaic or solar thermal power (around 90 g CO2-e/kWhel).

    The wide range for nuclear apparently comes from difficulties in estimating the carbon footprint of mining/processing the uranium, but that nuclear is sort of in the middle of the pack in carbon footprint relative to renewables in spite of the fueling costs is good to know.

    I suppose these sort of numbers may change dramatically in years to come. Take solar. A lot of focus seems to be on the efficiency of panels, which would almost certainly lower the carbon cost per unit of energy as it improves, but a breakthrough in panel longevity would also do that in an amortized emissions sort of way.