Solar Panel Puzzle

Discussion in 'Off-Topic' started by thingmaker3, Mar 27, 2009.

  1. thingmaker3

    Thread Starter Retired Moderator

    May 16, 2005
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    The NECA-IBEW Electrical Training Center, maintained by IBEW Local 48 and the Oregon-Columbia NECA Chapter, is located on Airport Way in Portland Oregon, just a short distance south of the Columbia River.

    On the south and west sides of the building are photovoltaic arrays. The arrays have the same number and type of modules. The arrays were installed at the same time, wired by the same people with the same methods, and tests indicate they have the same efficiency. Both are in good working order.

    As expected, the west array generates about 90% of the south array's output on a sunny summer early afternoon.

    Here's the puzzle: Annual average output of the west array significantly exceeds that of the south array. I know why. Do you?;)
     
    Last edited: Mar 27, 2009
  2. HarveyH42

    Active Member

    Jul 22, 2007
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    Got me, I grew up in Sandy (western side of Mt. Hood), seemed to be raining or snowing most of the year. Just a few months of daily sun during the summer. Would think solar a good investment. Portland was only 30 or so miles away...
     
  3. thingmaker3

    Thread Starter Retired Moderator

    May 16, 2005
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    Hint: has to do with location.;)
     
  4. Wendy

    Moderator

    Mar 24, 2008
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    Plane of the elliptic, how the sun swings across the sky?
     
  5. HarveyH42

    Active Member

    Jul 22, 2007
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    Don't tell me its down in the Columbia River Gorge.
     
  6. Mark44

    Well-Known Member

    Nov 26, 2007
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    Also, there is the odd tree or two in Oregon.
     
  7. Wendy

    Moderator

    Mar 24, 2008
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    Or Mountains.
     
  8. Ron H

    AAC Fanatic!

    Apr 14, 2005
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    I'm guessing it has to do with fog and overcast which I believe is very common in the Portland area, especially near the river, and typically burns off in the afternoon.
     
    Last edited: Mar 29, 2009
  9. thingmaker3

    Thread Starter Retired Moderator

    May 16, 2005
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    Ron knows his meteorology!!:D The morning fog along the river is indeed the culprit.
     
  10. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    They need to build a huge dehumidifier so their solar panels work!
     
  11. thingmaker3

    Thread Starter Retired Moderator

    May 16, 2005
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    I wonder if we could build a solar-powered dehumidifier...:D
     
  12. thatoneguy

    AAC Fanatic!

    Feb 19, 2009
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    You'd have to, otherwise it wouldn't be a "Green Project".
     
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