Navitron Renewable Energy and Sustainability Forum

Announcements & News => Astronomy & Science => Topic started by: Nickel2 on March 19, 2015, 11:25:10 PM



Title: Eclipse time!
Post by: Nickel2 on March 19, 2015, 11:25:10 PM
I put new batteries in my auto-dimming weldo-matic visor tonight ready for t'eclisp t'morrow.
Knowing my recent luck, it will be cloudy. The sun will disappear behind the clouds and stay there.


Title: Re: Eclipse time!
Post by: Stochengberge on March 20, 2015, 06:11:13 AM
Awoken this morn to a pretty grim day. Looks the same as yesterday when our PV generated a very round number!
I'm not holding out much hope...

SB.


Title: Re: Eclipse time!
Post by: todthedog on March 20, 2015, 06:54:37 AM
Completely grey here, still it might clear in time.


Title: Re: Eclipse time!
Post by: billi on March 20, 2015, 07:46:11 AM
Nice one MR Moon  to cover the sun ,  then i donot have to dump  excess power  into "Hot Air"

Will see  :laugh:  , still cloudy here , but  could clear up .... :crossed 



Title: Re: Eclipse time!
Post by: camillitech on March 20, 2015, 07:49:36 AM
Don't think we'll see much here but it's uncannily quiet even now. I watched the 1999 one from underwater in a salmon cage on the West Coast of Skye, boodly amazing and it fair spooked the fish too.


Title: Re: Eclipse time!
Post by: bxman on March 20, 2015, 08:03:08 AM
https://vimeo.com/120244769

https://vimeo.com/120244769?from=outro-embed

http://www.greatamericaneclipse.com/

http://www.greatamericaneclipse.com/march-20-2015/

there is a good  illustration of the process if you view the  first video on the title page  http://www.greatamericaneclipse.com/

for aug 2017  

 there are several videos of the great American total eclipse  not sure how you get that particular  one  the page keeps changing but give it a try
 https://vimeo.com/103958350


Title: Re: Eclipse time!
Post by: biff on March 20, 2015, 08:05:18 AM
There was fine rain last night,
                             This morning is clearing up nicely with the sun breaking through and the clouds are very high up and clearing away.
     My transplanted fruit bushes seem to like their new home and that bit of rain was just what they needed.
          
                                                                                                      Biff
          NB, believe it or not, Fog is just rolling in from the sea . I spoke too soon.


Title: Re: Eclipse time!
Post by: clockmanFR on March 20, 2015, 08:11:25 AM
Position N48 52 03
 Okay out of my 7.5kW of pv 5kW on trackers. 150W from trackers, 35W from 2.5kW static array.

Conditions, very dull wet, low cloud no sign of any sun, PV Trackers searching have given up on gone facing East, default position, a little more light and they head for Midday position.

08.12hrs


Title: Re: Eclipse time!
Post by: garethpuk on March 20, 2015, 08:27:20 AM
It was looking promising here (sw scotland) but it's getting cloudier by the minute  :(


Title: Re: Eclipse time!
Post by: clockmanFR on March 20, 2015, 08:32:11 AM
08.32hrs, PV outputs now down to 140w.



Title: Re: Eclipse time!
Post by: billi on March 20, 2015, 08:39:13 AM
 200 W from my 4 kw PV  at 8:39 ...


.... is it moon power  ralph:


Title: Re: Eclipse time!
Post by: clockmanFR on March 20, 2015, 08:41:06 AM
08 41hrs       My 3off 3.7m dia Hugh Piggott design Wind  turbines from nothing 40 minutes ago, now at 780w.

No sign of Sun, not even a glimmer in the sky, just dim dull grey.


Title: Re: Eclipse time!
Post by: biff on March 20, 2015, 08:54:39 AM
The sky is just a dull grey,
                      However the defused light is bright enough to give us 133v x 2amps and that is enough to keep everything ticking over. Our turbine is also hunting for a breeze and will be churning shortly by the looks of things.
                                                                     Biff
                                       


Title: Re: Eclipse time!
Post by: clockmanFR on March 20, 2015, 09:07:48 AM
09 01hrs

Getting dim here, still can not see any sun or where the sun is. Grey

Output of PV at 110W

Turbines still generating at 780w constant breeze.

The static 2.5kW arry is only managing 10w output.

Present position of Trackers all on independent light tarcking circuits.


Title: Re: Eclipse time!
Post by: biff on March 20, 2015, 09:25:58 AM
Quite dark here at the moment,
                                 Just like the start of a heavy thunder storm. Our solar is reading zero amps and voltage is 131v,
                                                                       Biff


Title: Re: Eclipse time!
Post by: clockmanFR on March 20, 2015, 09:29:05 AM
09 25hrs.

Output from my 7.5kW PV is at this moment 48W.

No 3 Tracker, in photo facing west, Midnite controller of 2kW of PV Yingli Panda 250W panels has shut down.

No 1 & 2 Tracker still outputting at 40W. PV Panels are Sharpe 190W.

2.5kW 250W PV panels with mixed manufacturers, output from Sunny Island GTI to my mini grid is 8W at 230vac.  


Title: Re: Eclipse time!
Post by: Brian H on March 20, 2015, 09:38:29 AM
Also getting dark here. Can't tell where the sun should be through the cloud and misty drizzle.


Title: Re: Eclipse time!
Post by: garethpuk on March 20, 2015, 09:40:19 AM
I put new batteries in my auto-dimming weldo-matic visor tonight ready for t'eclisp t'morrow.
Knowing my recent luck, it will be cloudy. The sun will disappear behind the clouds and stay there.


Be very careful about using an auto dim mask, some only darken where arc is struck and there is a flash of light, a constant bright light ie looking at the sun won't make them go dark

We've got patchy cloud now and its great as you can see it perfectly through the not so thick patches, just need to keep an eye on the edge of the cloud and look away before it's too bright


Title: Re: Eclipse time!
Post by: clockmanFR on March 20, 2015, 09:49:42 AM
09 44hrs.

Outputs now climbing, now at 105W.


Midnite controller just woke up.

But climbing fast on the voltages.

I will do another readings in 1 hour, then I can see what the percentage was.

Interesting that the Sharpe panels on the No 1 & 2 tracker with a Tristar MPPT controller, were still producing no matter what.

Nickle2, Might actually do a Full moon reading sometime and see what voltage I am getting.

No windy gusts, breeze back to an average breeze of about 400W for the Turbines.


Title: Re: Eclipse time!
Post by: billi on March 20, 2015, 09:50:26 AM
....... I wish , i knew more about taking pictures of the sun ,....    nice event here ,  its feels like sunset , the  sun is here but its dimmed ,  i think i go for a pint and  buy a steak  at the local butcher store .... and fire up the BQ  ok not a good idea... at half past 9 .... , but

Anyway i tried a few methods to photograph it ....   bottle of Olive Oil as a filter ....



(http://s23.postimg.org/v246qplo7/eclipse.jpg) (http://postimg.org/image/v246qplo7/)

(http://s8.postimg.org/ff8xneutt/eclipse2.jpg) (http://postimg.org/image/ff8xneutt/)


Title: Re: Eclipse time!
Post by: biff on March 20, 2015, 09:53:33 AM
Our voltage now 129 even if it is not as dark as before, (9.46am)
                                          It is getting lighter. Our turbine is still stationary, still too much resistance in the bank for the light breeze
  We are back in business,  129v x 1amp (9.53am)
                                     Biff


Title: Re: Eclipse time!
Post by: skyewright on March 20, 2015, 09:53:48 AM
Significant & noticeable dimming (not quite twilight, but heading there). but almost total cloud, so nothing spectacular. There were some breaks in the cloud, but well round to the North - maybe even over Raasay?

The birds didn't stop singing.


Title: Re: Eclipse time!
Post by: dan_b on March 20, 2015, 09:59:27 AM
Totally clouded over here too in London, but it did get pretty gloomy and my solar panel output fell completely to zero!


Title: Re: Eclipse time!
Post by: Nickel2 on March 20, 2015, 10:15:43 AM
Well, the reports were more interesting than the event. All cloudy in NE Hants, the sun came up and the sky was grey. It's still grey, but slightly less now. Welding visor put away until next use. In a word, *dull*. I want a refund!
 Garethpuk, thanks for your warning, I set the visor (speedglas 9100) to max sensitivity and darkness, so it goes black as soon as it is taken outdoors, so no probs there.
The bird song reduced by 50%, but the bluetits are still fluttering about, song-thrush feeding on next-door's lawn. Last eeklipse in 1999 everything went back to sleep as it was during the day, the re-awoke. This time they just had a lie-in and were late getting up.
It has stayed at the overnight low of 4c and has not started warming up yet.
How was it in the more northern areas?


Title: Re: Eclipse time!
Post by: Bodidly on March 20, 2015, 10:16:40 AM
For those that had cloud you didn't miss much. It was crystal clear here and I was hoping it would be impressive but sadly 85% eclipse don't make a lot of difference. It got a bit chilly and dimmed a bit and it was over. Never mind there is always the next full eclipse in .....Ooh well I will be dead then  :)


Title: Re: Eclipse time!
Post by: Nickel2 on March 20, 2015, 10:21:04 AM
Bodidly - That's as maybe, but you'll be sitting on top of any cloud, so should get a better view!


Title: Re: Eclipse time!
Post by: Fintray on March 20, 2015, 10:23:08 AM
Best I could get in Aberdeen



Title: Re: Eclipse time!
Post by: heatherhopper on March 20, 2015, 10:24:20 AM
Clearish skies here.
Like Billi not much cop with photography - just point and click as a rule - but dug out a filter from a former life used for studying burner flame profiles, bunged it over the lens and got this -
(http://s13.postimg.org/ok4sn6roz/Eclipse.jpg) (http://postimg.org/image/ok4sn6roz/)
Absolutely no idea what it represents other than the sun with the moon in front of it but it was around about maximum coverage time. This is how the scene was when it started to get noticeably brighter -
(http://s21.postimg.org/45eneaxxf/Eclipse2.jpg) (http://postimg.org/image/45eneaxxf/)
PV bottomed at around 120w, wind did not change at all and there was only a very brief period of feeling cooler, not enough to affect the temperature recorder. Curiously the birds etc did not go quiet as I have observed with eclipses before.


Title: Re: Eclipse time!
Post by: langstroth3 on March 20, 2015, 10:40:54 AM
Thick uniform cloud cover. Noticeable impact on solar panel output though:



Title: Re: Eclipse time!
Post by: clockmanFR on March 20, 2015, 10:49:22 AM
Still a dim grey day, no sign of the Sun.

PV now at 550w.

So averaging out my PV output before and after the event......367W

My lowest PV Output was 48W

So roughly.... during the Eclipse itself at peak............ I lost about 86% of my normal PV Output.

Even though it was already grey and dim and no sign of a Sun or where it was in the sky, just dim grey, grey & more grey.


Title: Re: Eclipse time!
Post by: mespilus on March 20, 2015, 10:57:23 AM
A noticeable, well-timed, Gridwatch spike on Pumped hydro,
and,
a bulge on Hydro.

Well done the National Grid,
engineering & experience topping ignorance & the senseless spread of despair.


Title: Re: Eclipse time!
Post by: billi on March 20, 2015, 10:59:01 AM
come back  MOON !!! ,   Sun  now feeding the batt  at 11:00 with 2000 watt , what a nightmare  :hysteria


Anyone has a DC Aircondition handy , as a Dump ?


Title: Re: Eclipse time!
Post by: camillitech on March 20, 2015, 11:30:50 AM
Come back sun!!!! pishing with rain here now  :'(

We did get a glimpse or two in the end through gaps in the cloud.

(http://i224.photobucket.com/albums/dd170/camillitech/200315%20006_zpsalhwith3.jpg)

Even the 'post lady' was impressed  8)

(http://i224.photobucket.com/albums/dd170/camillitech/200315%20007_zps5o4imst9.jpg)

looked a lot better though the welding mask than the camera right enough but there was a steady breeze throughout. Dunno why that surprised me, I guess it was because the last one I saw was total and it went deathly quiet.


Title: Re: Eclipse time!
Post by: clockmanFR on March 20, 2015, 11:38:11 AM
Hay up, ...that post lady has my blasted Am.azon packet that has gone missing here.

Please do send her this way please Paul........ ;D


Title: Re: Eclipse time!
Post by: clockmanFR on March 20, 2015, 11:47:12 AM
Guess what just arrived...?

That Post lady/person must have super human powers, one minute I ask, the next its here.  exhappy:


 :genuflect


Title: Re: Eclipse time!
Post by: mespilus on March 20, 2015, 11:53:12 AM
^
Sunny Island instruction manual.
(Except the German call centre mis-understood,
and,
it is in all the EU languages, except English & French!).


Title: Re: Eclipse time!
Post by: billi on March 20, 2015, 11:57:38 AM
 ;D 

i will not translate   :hysteria


Title: Re: Eclipse time!
Post by: dhaslam on March 20, 2015, 12:05:49 PM
Very cloudy here  but  the sun started to become visible near the end of the eclipse.

(http://www.pbase.com/dhaslam/image/159487768/original.jpg)




Title: Re: Eclipse time!
Post by: camillitech on March 20, 2015, 12:40:21 PM
Lovely picture DH  :genuflect


Title: Re: Eclipse time!
Post by: biff on March 20, 2015, 01:06:12 PM
Our PV  stopped for about 10 mins,
                         And then slowly crept back up into the dump load and our turbine is doing the business once again.
  I watched the Norwegian version live and that was very dramatic. The Norwegian eclipse was a total blackout for a good 60 seconds.
  We hardly had anything that was different from a bad thunderstorm.
                                                              Biff


Title: Re: Eclipse time!
Post by: Iain on March 20, 2015, 07:36:21 PM
Eclipse in Plymouth!


Title: Re: Eclipse time!
Post by: desperate on March 20, 2015, 08:24:19 PM
Murphy's law in action, sun perfectly eclipsed for four days now by grey cloud, then an hour after the real eclipse.....................the effing clouds part and we get a beautiful afternoon :fume :fume

Dagnabbit!!

Desp


Title: Re: Eclipse time!
Post by: marcus on March 21, 2015, 12:04:36 AM
I must have good eclipse-weather-luck, 'cos not only was it crystal clear here for the duration (a rarity in these parts) - even the con-trails of the passing airliners dissipated in seconds, but it was clear where I was working during the last partial eclipse (1999?)


Mind you, I don't have the same luck with mountains; I've been to Darjeeling 3 times and still haven't seen the Kanchenjunga Mtns, and went to a place (forget the name) near the foot of Mt Kilamanjaro and didn't see it at all  >:( ; and by all accounts, it's pretty hard to miss.


Title: Re: Eclipse time!
Post by: camillitech on March 21, 2015, 06:28:44 AM
Funny how much difference a few miles makes, darling wife, her of the welding mask and postie jacket headed off to work at 9:30ish. She arrived home at 5:30 raving about the stunning beauty of it all and how spectacular it was as she drove the ten miles into work  banghead:


Title: Re: Eclipse time!
Post by: desperate on April 20, 2015, 08:55:44 PM
Murphy's law in action, sun perfectly eclipsed for four days now by grey cloud, then an hour after the real eclipse.....................the effing clouds part and we get a beautiful afternoon :fume :fume

Dagnabbit!!

Desp


Murphy's done well this time :fume  this last new moon on saturday the sky was widely as clear as a bell  :fume

Kinell