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emahlee's profile
Emily Cunningham
Emily Cunningham
Emily Cunningham
@emahlee

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Emily Cunningham

@emahlee

Founding member of @AMZNforclimate. UX designer calling for climate leadership from Amazon. Fired for raising the alarm about climate and covid-19. She/her.

dxʷdəwʔabš land
seattletimes.com/business/amazo…
Joined December 2008

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    1. harry benham‏ @harrybenham_1 17 Aug 2019
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      harry benham Retweeted Emily Cunningham

      This article on EROI however makes the cardinal error of using 5-6 year old data on PV/wind costs in its analysis. That is equivalent to using 50 year old data for coal/gas plant efficiency. EROI of PV solar and wind is more like 20+ using latest LCOE (eg Lazard 12.0).https://twitter.com/emahlee/status/1162180547369562112 …

      harry benham added,

      Emily Cunningham @emahlee
      That's not all. While @harrybenham_1 describes fossil fuel inefficiencies when we use them, this new study shows how inefficient they are when focused on Energy Return On Energy Invested (EROI), a metric of how much energy it takes to provide energy. 10/ https://www.bloomberg.com/news/articles/2019-07-16/fossil-fuels-are-far-less-efficient-than-previously-thought …
      Show this thread
      1 reply 1 retweet 3 likes
    2. Emily Cunningham‏ @emahlee 17 Aug 2019
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      Replying to @harrybenham_1

      Could you spell this out for me Harry? I'm not following. that EROI for solar and wind is 20:1 (or higher) is a good thing, yes? Do I understand that correctly?

      1 reply 0 retweets 0 likes
    3. harry benham‏ @harrybenham_1 17 Aug 2019
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      Replying to @emahlee

      The bigger number the better - it’s the value of energy created divided by energy needed to create it -it’s notoriously been misused as oil and gas EROI often ignores costs of extraction, refining etc. In this case they include that - but then use antiquated solar costs 😱

      1 reply 0 retweets 1 like
    4. Emily Cunningham‏ @emahlee 17 Aug 2019
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      Replying to @harrybenham_1

      Oh, so fossil fuel EROI is much worse than previously thought (as the study shows), and (as you've pointed out), with more recent data, solar and wind EROI is much better. Though the study shows 6:1 it's actually 20:1 or higher!

      1 reply 0 retweets 0 likes
    5. harry benham‏ @harrybenham_1 17 Aug 2019
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      Replying to @emahlee

      That is my position on it - best analysis is by Kingsmill Bond of Carbontracker - note I work with him but nevertheless his analysis is the best there is in EROI I think

      1 reply 0 retweets 0 likes
      Emily Cunningham‏ @emahlee 17 Aug 2019
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      Replying to @harrybenham_1

      @exergy_paul, @dr_anneowen, @librand3, @lukas_hardt. With more current data, it appears that the EROI of solar and wind is even better than your study concluded (please scroll up), which is great news. cc @JKSteinberger

      8:13 AM - 17 Aug 2019
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