The dirty secret of the solar industry

Estimates have been updated (07/01/2023)

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25 Responses
  1. John Arthurs

    Nice work. Can you also look at wind turbines? From my back of envelope of envelope calculations, a 7MW turbine has around 11 000 tons CO2 of materials’ embodied emissions, which gives around 68g CO2/KWH assuming capacity factor of 30% and a 20 year life span. That does not include the actual emissions of transport of minerals & manufacture, transport of complements to the site, assembly on site, earthworks & roads required, ecocide emissions where the turbines are deployed in ecosystems, ecocide emissions from transmission lines, ecocide emissions from mining, loss of carbon uptake from wind farm site, from transmission lines, from mining, SF6 emissions from wind turbine… as far as I can ascertain.

    Also has some direct earth surface warming effect from air mixing.

    Don’t also forget that output decreases by 16% per decade, and output is limited by leeward density of wind turbines, and capacity credits, where useable output declines to about 5% of maximal generation as more turbines are added to the grid.

    Gas generation increases when used to balance the output, causing negligible reduction of overall emissions.

    Another issue is use of mean rather than median for capacity factor. Median is always more accurate for skewed data sets. Mean overestimates useful output.

  2. […] 7月4日に公開されたイタリアの研究者エンリコ・マリウッティによる論文「太陽光発電産業の汚れた秘密(The Dirty Secret of the Solar Industry)」は、太陽光発電のCO2排出量について、ライフサイクルCO2排出量評価(発電設備の建設、運転、廃棄に至るまでの全体におけるCO2排出量の評価)におけるIEA、IPCCなどのて既存の文献は著しい過小評価になっていると主張した内容となっている(The Dirty Secret of the Solar Industry、Substack、アゴラ)。 […]

  3. […] 太陽光発電のCO2排出量は実はかなり多い、という論文が2023年7月4日付で無料公開された。(論文:英語)。イタリアの研究者、エンリコ・マリウッティ(Enrico Mariutti)によるもので、タイトルは「太陽光発電産業の汚れた秘密(The Dirty Secret of the Solar Industry)」。 […]

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