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stmbtwle

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Reply with quote  #1 
Hmmm... http://e360.yale.edu/feature/floating_solar_a_win-win_for_drought-stricken_lakes_in_us/3011/

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Bert

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Reply with quote  #2 
I would be concerned about polluting the water. Besides that, it would may keep the water from evaporating. Maybe not as much as they think.



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stmbtwle

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How would it pollute the water? And it's SUPPOSED to prevent evaporation.
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SolarInterested

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Reply with quote  #4 
I've read about these before but this is one aspect I hadn't considered:

"A key selling point of floatovoltaics is the extra energy punch they deliver when compared to terrestrial photovoltaics in a similar climate. Hovering just above sun-shaded lake water, the floating photovoltaic panels would operate at cooler temperatures than solar arrays on desert land – a key factor in improving the productivity of semiconductors, including PV cells. One project proponent expects a 50 percent boost in electricity per watt of installed power from her company’s planned solar arrays at a sun-saturated sewage treatment pond in Jamestown, South Australia."

Temperature effects previously discussed in this topic:
PV Panels - Temperature Effects on Performance

http://simplysolar.supporttopics.com/post?id=7526220

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Bert

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Quote:
Originally Posted by stmbtwle
How would it pollute the water? And it's SUPPOSED to prevent evaporation.


I don't know if it would. Just wondered if...

They have to have some way to support the panels. Something must enter the water to hold them up.

It just seems like it goes against nature too much.

The panels would shade the water but would also hold heat in. Just not sure if it would stop the evaporating that much to be worth it.

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stmbtwle

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Reply with quote  #6 
It looks like the panels are on floats... And according to the article several systems are already in service, so I guess it works.  



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colinmcc

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Reply with quote  #7 
The floats are HDPE, which is used extensively for drinking water pipes, so I doubt there is any danger of pollution.

I'd be more concerned about the water and voltages involved, Most large scale PV installs are now running up to 1000V DC strings, and there is a push towards 1500V strings!

Hydrelio©_Floating_Solar_System_Ciel_&_terre_-_2016-08-13_06.57.53.png 

More on the floats can be found at the manufacturer's site,

SolarInterested

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Quote:
Originally Posted by colinmcc
...More on the floats can be found at the manufacturer's site,

Thanks for the link. They also show an option " to manage and rehabilitate polluted water" including aerating the water under the floats.

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colinmcc

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On the same day that President Donald Trump announced that the United States will be exiting the Paris Climate Accord, there is at least one ray of environmental sunshine. The world’s largest floating solar energy farm (for now) has officially been fired up in China.

Located in Huainan, China, the massive new array of solar panels floats over what was once mining land. In the past this region was powered by coal mined in the area, but those mines eventually collapsed and over time, filled with rainwater. The resulting lake was left largely unused, until now.

More on this can be found at:https://futurism.com/the-worlds-largest-floating-solar-plant-is-finally-online/

sungrow-power-floating-solar-plant-huainan-china-designboom-05-25-2017-fullheader-1400x600.jpg 

stmbtwle

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Reply with quote  #10 
WOW great setup...  Why can't WE do that? 


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