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bobwyman's profile
Bob Wyman for Congress (NY CD-10)
Bob Wyman for Congress (NY CD-10)
Bob Wyman for Congress (NY CD-10)
@bobwyman

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Bob Wyman for Congress (NY CD-10)

@bobwyman

See: http://linkedin.com/in/bobwyman/  Note: Following me does NOT constitute an endorsement of my candidacy.

NYC
Joined March 2008

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    1. Richard Meyer‏ @RichardMeyerDC 20 Jan 2019

      Richard Meyer Retweeted Gregor Macdonald

      Gregor's ongoing thread is worth a read. But I need to harp on point in this tweet. The logic -- that as we add EVs we can add solar & wind and therefore that demand is coming from clean power -- seems reasonable. Except its wrong. Or at least incomplete. 1/https://twitter.com/GregorMacdonald/status/1087051479213473792 …

      Richard Meyer added,

      Gregor Macdonald @GregorMacdonald
      16/ China is now trying to run the same formula as California: guiding the system so the next unit of electricity demand comes from cleaner sources, and the next car to hit the road is an EV. Given China's scale, amazing how fast it's happening. http://gum.co/OilFall 
      Show this thread
      1 reply 1 retweet 4 likes
      Show this thread
    2. Richard Meyer‏ @RichardMeyerDC 20 Jan 2019

      At first blush it seems correct. If we add electric vehicles to the grid and we *also* add enough zero-carbon generation to exactly match the new demand, then that new demand is being met by zero-carbon energy. Right? 2/

      1 reply 0 retweets 0 likes
      Show this thread
    3. Richard Meyer‏ @RichardMeyerDC 20 Jan 2019

      To illustrate why the logic is wrong, look at the scenario where zero-carbon generation grows, but demand does not increase. What changes? 3/

      1 reply 0 retweets 0 likes
      Show this thread
    4. Richard Meyer‏ @RichardMeyerDC 20 Jan 2019

      We get *less* fossil generation; it ramps down to balance demand. In other words, the new wind & solar displaces fossil resources. 4/

      1 reply 0 retweets 0 likes
      Show this thread
    5. Richard Meyer‏ @RichardMeyerDC 20 Jan 2019

      Sidebar: I am assuming, rightly, that the zero-carbon is dispatched first and regardless of demand. 5/

      1 reply 0 retweets 0 likes
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    6. Richard Meyer‏ @RichardMeyerDC 20 Jan 2019

      Now let's add that new demand, say from the EV you bought and charge every day, back into the mix. What changes? 6/

      1 reply 0 retweets 0 likes
      Show this thread
    7. Richard Meyer‏ @RichardMeyerDC 20 Jan 2019

      The amount of electricity generated by fossil fuels goes up; not the amount of renewable power. 7/

      1 reply 0 retweets 0 likes
      Show this thread
    8. Richard Meyer‏ @RichardMeyerDC 20 Jan 2019

      We are, appropriately, doing a "marginal" analysis. Meaning, we look at how your specific energy choices affect the grid. How does generation *actually* change when you plug your EV in. 8/

      1 reply 0 retweets 0 likes
      Show this thread
    9. Richard Meyer‏ @RichardMeyerDC 20 Jan 2019

      And yes, before you @ me saying that we need to do this analysis on a sub-hourly basis by region and fossil generation isn't *always* the marginal resource -- yes, I know! But most of the time, in most areas, it *is.* 9/

      3 replies 0 retweets 0 likes
      Show this thread
    10. Richard Meyer‏ @RichardMeyerDC 20 Jan 2019

      Bottom line: just because we added an equal amount of wind and solar generation to meet new electric vehicle demand doesn't mean that those EVs are necessarily zero-carbon. 10/10

      5 replies 0 retweets 2 likes
      Show this thread
      Bob Wyman for Congress (NY CD-10)‏ @bobwyman 24 Jan 2019
      Replying to @RichardMeyerDC

      Annual grid emissions depend on total, not marginal consumption. As the generation mix tends toward clean resources, average emissions are reduced since some EV's get non-marginal power. Marginal analysis is only relevant when assuming steady-state conditions. Not reality.

      9:59 AM - 24 Jan 2019
      0 replies 0 retweets 0 likes

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