Hi.
I read in a NATURE article about the "heat island" effect of solar arrays, where they run quite a lot hotter than the surrounding land, and I was interested to know if anybody was using these things as a reliable source of lift?
Related to this, they are building a gigantic solar array at the end of the runway at Christchurch Airport, and I wonder if the resulting thermals would result in a bumpy - or even unsafe - take off or landing.
Thanks
Simon.
I haven't noticed any extra bumps while flying over the solar panels at
very low altitudes in my gyro.
Dan 5J
On 9/14/22 07:22, Mark Mocho wrote:
There is a large multi-acre solar field a couple of miles west of the
Moriarty Airport. I have been cruising over it on informal "tests" to
see whether there is any appreciable change in lift (or sink). I
haven't noticed anything different from surrounding terrain, but the
reflection of the sun can be more than just distracting. "Blinding" is
a better description when the sun's angle matches the panel array and I
am in the wrong place. One reason I suspect that the dark solar panels
don't generate much of a thermal is that they are raised above the
ground surface, leaving the soil in shadow and allowing air to freely
flow around the panels without heating up very much. And since the
panels do not have much mass compared to the unshaded ground, little
energy is transferred to the airmass by convection. The sun heats the
ground, the ground heats the air and when enough heat is absorbed, the
air expands and rises. The solar array does not appear to transfer
sufficient heat for thermal generation. More research is needed. I am
going to propose that some of our local pilots make a point to cruise
over the array and maybe we can make some valid conclusions about
lift/sink presence from their flight traces.
Hi.Simon, great topic! I fly in an area that is projected to be the largest solar array in the USA within a short period of time. As I flew today I noticed a couple thousand more acres being prepared for solar panels. At this time we are within a very short
I read in a NATURE article about the "heat island" effect of solar arrays, where they run quite a lot hotter than the surrounding land, and I was interested to know if anybody was using these things as a reliable source of lift?
Related to this, they are building a gigantic solar array at the end of the runway at Christchurch Airport, and I wonder if the resulting thermals would result in a bumpy - or even unsafe - take off or landing.
Thanks
Simon.
Hi.
I read in a NATURE article about the "heat island" effect of solar arrays, where they run quite a lot hotter than the surrounding land, and I was interested to know if anybody was using these things as a reliable source of lift?
Related to this, they are building a gigantic solar array at the end of the runway at Christchurch Airport, and I wonder if the resulting thermals would result in a bumpy - or even unsafe - take off or landing.
Thanks
Simon.
radioactive heat produced from the panels. Old Bob, The Purist
On Wed, 14 Sep 2022 15:56:20 -0700 (PDT), youngbl...@gmail.com wrote:
radioactive heat produced from the panels. Old Bob, The PuristReally? Are these solar panels mounted on a nuclear power plant or a spent uranium waste dump?
On 9/15/2022 5:48 AM, Martin Gregorie wrote:
On Wed, 14 Sep 2022 15:56:20 -0700 (PDT), youngbl...@gmail.com wrote:
I think Towed Bob was a victim of auto-correct (radiation changed to radioactive) andradioactive heat produced from the panels. Old Bob, The PuristReally? Are these solar panels mounted on a nuclear power plant or a spent uranium waste dump?
insufficient review of his writing; regardless, the paper gave no hint of solar panel heat
on thermal production that I could find.
--Thanks for the correction Eric, I should have stated hear radiation created by the panels. Old Bob, The Purist
Eric Greenwell - USA
- "A Guide to Self-launching Sailplane Operation" https://sites.google.com/site/motorgliders/publications
On Thursday, September 15, 2022 at 9:38:01 AM UTC-4, Eric Greenwell wrote:
On 9/15/2022 5:48 AM, Martin Gregorie wrote:
On Wed, 14 Sep 2022 15:56:20 -0700 (PDT), youngbl...@gmail.com wrote:
I think Towed Bob was a victim of auto-correct (radiation changed to radioactive) andradioactive heat produced from the panels. Old Bob, The PuristReally? Are these solar panels mounted on a nuclear power plant or a spent
uranium waste dump?
insufficient review of his writing; regardless, the paper gave no hint of solar panel heat
on thermal production that I could find.
Heat radiation, only the second mistake that I have ever made, better record than the late Rush Limbaugh. OBTP--Thanks for the correction Eric, I should have stated hear radiation created by the panels. Old Bob, The Purist
Eric Greenwell - USA
- "A Guide to Self-launching Sailplane Operation" https://sites.google.com/site/motorgliders/publications
On Thursday, September 15, 2022 at 11:17:45 AM UTC-4, youngbl...@gmail.com wrote:
On Thursday, September 15, 2022 at 9:38:01 AM UTC-4, Eric Greenwell wrote:
On 9/15/2022 5:48 AM, Martin Gregorie wrote:
On Wed, 14 Sep 2022 15:56:20 -0700 (PDT), youngbl...@gmail.com wrote:
I think Towed Bob was a victim of auto-correct (radiation changed to radioactive) andradioactive heat produced from the panels. Old Bob, The PuristReally? Are these solar panels mounted on a nuclear power plant or a spent
uranium waste dump?
insufficient review of his writing; regardless, the paper gave no hint of solar panel heat
on thermal production that I could find.
Switching from hip waders to chest waders!! :-)Heat radiation, only the second mistake that I have ever made, better record than the late Rush Limbaugh. OBTP--Thanks for the correction Eric, I should have stated hear radiation created by the panels. Old Bob, The Purist
Eric Greenwell - USA
- "A Guide to Self-launching Sailplane Operation" https://sites.google.com/site/motorgliders/publications
On Thursday, September 15, 2022 at 11:07:35 AM UTC-7, youngbl...@gmail.com wrote:
On Thursday, September 15, 2022 at 11:17:45 AM UTC-4, youngbl...@gmail.com wrote:
On Thursday, September 15, 2022 at 9:38:01 AM UTC-4, Eric Greenwell wrote:
On 9/15/2022 5:48 AM, Martin Gregorie wrote:
On Wed, 14 Sep 2022 15:56:20 -0700 (PDT), youngbl...@gmail.com wrote:
I think Towed Bob was a victim of auto-correct (radiation changed to radioactive) andradioactive heat produced from the panels. Old Bob, The PuristReally? Are these solar panels mounted on a nuclear power plant or a spent
uranium waste dump?
insufficient review of his writing; regardless, the paper gave no hint of solar panel heat
on thermal production that I could find.
You also misspelled "voltaic":Heat radiation, only the second mistake that I have ever made, better record than the late Rush Limbaugh. OBTP--Thanks for the correction Eric, I should have stated hear radiation created by the panels. Old Bob, The Purist
Eric Greenwell - USA
- "A Guide to Self-launching Sailplane Operation" https://sites.google.com/site/motorgliders/publications
Heat Transfer In Photovoltic Panels", written by Gomez https://www.lth.se/fileadmin/ht/Kurser/MVK160/2009_reports/Gonzalo_calero.pdf.pdf
Tom
On Thursday, September 15, 2022 at 11:17:45 AM UTC-4, youngbl...@gmail.com wrote:
On Thursday, September 15, 2022 at 9:38:01 AM UTC-4, Eric Greenwell wrote:
On 9/15/2022 5:48 AM, Martin Gregorie wrote:
On Wed, 14 Sep 2022 15:56:20 -0700 (PDT), youngbl...@gmail.com wrote:
I think Towed Bob was a victim of auto-correct (radiation changed to radioactive) andradioactive heat produced from the panels. Old Bob, The PuristReally? Are these solar panels mounted on a nuclear power plant or a spent
uranium waste dump?
insufficient review of his writing; regardless, the paper gave no hint of solar panel heat
on thermal production that I could find.
Heat radiation, only the second mistake that I have ever made, better record than the late Rush Limbaugh. OBTP--Thanks for the correction Eric, I should have stated hear radiation created by the panels. Old Bob, The Purist
Eric Greenwell - USA
- "A Guide to Self-launching Sailplane Operation" https://sites.google.com/site/motorgliders/publications
On Sunday, September 18, 2022 at 9:42:40 AM UTC-7, 2G wrote:
On Thursday, September 15, 2022 at 11:07:35 AM UTC-7, youngbl...@gmail.com wrote:
On Thursday, September 15, 2022 at 11:17:45 AM UTC-4, youngbl...@gmail.com wrote:
On Thursday, September 15, 2022 at 9:38:01 AM UTC-4, Eric Greenwell wrote:
On 9/15/2022 5:48 AM, Martin Gregorie wrote:
On Wed, 14 Sep 2022 15:56:20 -0700 (PDT), youngbl...@gmail.com wrote:
I think Towed Bob was a victim of auto-correct (radiation changed to radioactive) andradioactive heat produced from the panels. Old Bob, The PuristReally? Are these solar panels mounted on a nuclear power plant or a spent
uranium waste dump?
insufficient review of his writing; regardless, the paper gave no hint of solar panel heat
on thermal production that I could find.
Dickhead, the article and equations seem much more relevant than you, if you could offer any better theory please post it. Old Bob, The PuristYou also misspelled "voltaic":Heat radiation, only the second mistake that I have ever made, better record than the late Rush Limbaugh. OBTP--Thanks for the correction Eric, I should have stated hear radiation created by the panels. Old Bob, The Purist
Eric Greenwell - USA
- "A Guide to Self-launching Sailplane Operation" https://sites.google.com/site/motorgliders/publications
Heat Transfer In Photovoltic Panels", written by Gomez https://www.lth.se/fileadmin/ht/Kurser/MVK160/2009_reports/Gonzalo_calero.pdf.pdf
TomUnfortunately that article is purely theoretical and gives no guidance whatsoever to what the real-world coefficients are (PottyMouth Bobbie probably doesn't care). Here is an article that is far more practical (and the equations are readable!):
"Roof-mounted photovoltaic generator temperature modeling based on common brazil materials"
https://www.researchgate.net/publication/357627841_Roof-mounted_photovoltaic_generator_temperatue_modeling_based_on_common_brazil_roofing_materials/link/631211865eed5e4bd13e28b0/download
Tom
On Sunday, September 18, 2022 at 1:01:31 PM UTC-4, 2G wrote:
On Sunday, September 18, 2022 at 9:42:40 AM UTC-7, 2G wrote:
On Thursday, September 15, 2022 at 11:07:35 AM UTC-7, youngbl...@gmail.com wrote:
On Thursday, September 15, 2022 at 11:17:45 AM UTC-4, youngbl...@gmail.com wrote:
On Thursday, September 15, 2022 at 9:38:01 AM UTC-4, Eric Greenwell wrote:
On 9/15/2022 5:48 AM, Martin Gregorie wrote:
On Wed, 14 Sep 2022 15:56:20 -0700 (PDT), youngbl...@gmail.com wrote:
I think Towed Bob was a victim of auto-correct (radiation changed to radioactive) andradioactive heat produced from the panels. Old Bob, The Purist >>Really? Are these solar panels mounted on a nuclear power plant or a spent
uranium waste dump?
insufficient review of his writing; regardless, the paper gave no hint of solar panel heat
on thermal production that I could find.
You also misspelled "voltaic":Heat radiation, only the second mistake that I have ever made, better record than the late Rush Limbaugh. OBTP--Thanks for the correction Eric, I should have stated hear radiation created by the panels. Old Bob, The Purist
Eric Greenwell - USA
- "A Guide to Self-launching Sailplane Operation" https://sites.google.com/site/motorgliders/publications
Heat Transfer In Photovoltic Panels", written by Gomez https://www.lth.se/fileadmin/ht/Kurser/MVK160/2009_reports/Gonzalo_calero.pdf.pdf
TomUnfortunately that article is purely theoretical and gives no guidance whatsoever to what the real-world coefficients are (PottyMouth Bobbie probably doesn't care). Here is an article that is far more practical (and the equations are readable!):
"Roof-mounted photovoltaic generator temperature modeling based on common brazil materials"
https://www.researchgate.net/publication/357627841_Roof-mounted_photovoltaic_generator_temperatue_modeling_based_on_common_brazil_roofing_materials/link/631211865eed5e4bd13e28b0/download
TomDickhead, the article and equations seem much more relevant than you, if you could offer any better theory please post it. Old Bob, The Purist
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