Author Topic: Anemomether site preliminary inspection (Read 2505 times)

RodN · « **on:** March 15, 2007, 12:25:55 PM »

Here are the photos of this morning preliminary inspection to the soccer and athletic stadium of my small city. Hope images aren't too big.

Here we are:

This is the tower we are going to climb. about 30 meters high, made by 3 section of about ten meters of steel pipe, the diameter is about 55 cms (22-23 inches)flanged at the junctions. I assure you that despite that, at the top of the tower you will feel like you are in a boat. Oscillations are small, only fraction of a centimeter i suppose, but really scaring.

As you can see, towers are higer than any other building in the surrounding area.

The stadium is VERY near to the sea. Only a road betwen the tower we choose and the beach. Thogh this is a touristic city, this part of the beach is not suitable for that due to trees continously bringed in by the near river. Even if they periodically clear the beach surface from them. If we will get good report from anemomether, we plan to place a wind turbine about 20 KW a little (50 metres) right (south) of this photo, in a public field (we already got the permission from municipality) The place is ideal to get maximum effect from the "sea breezes", wind caused by the temp difference between sea and ground. They are here even (and expecially) during the hot summer days, when the azorres or african anticyclon stay over Italy for about 2 months. Not very windy, but anyway 4-6 hours each day.

Another shot from the same point. I was at the lowest platform

This is from the top of the tower. I didn't remember to take some panoramic photos cause I was here to take some close picture of the structure, in order to find the best way to place the anemomether respecting safety issues.

This is the anemomether we are going to install. It comes from APRS world, in USA, via a spanish importer (you can see the sticker). We choosed it due to his low energy consumption (7mA), high memory capacity (6 months with a step of 30 seconds) and flexibility (it works from 7 to 45 volts, letting us choose the batteries we want to).

Also, the memory stick is removable, and that mean we don't have to bring on the tower a laptop, we can just extract it and place another one in its place, without loosing a second of logging. Cards costs about ten dollars.

TomW · « **Reply #1 on:** March 15, 2007, 07:03:44 AM »

RodN;

HaHa, not only are your pictures HUGE but you dumped an entire herd of them in the Diary. Its your Diary and you can dump a few megs of photos in it if you like, I hope someone actually waits to download them.

Too lazy to go thru and fix them up so folks will just get to wait for them.

In case you didn't know, most people just click away rather than wait for big downloads unless they are sure they are interested in the subject.

Good luck in your project.

Cheers.

TomW

A6D9 · « **Reply #2 on:** March 15, 2007, 07:38:11 AM »

Well I'll pipe up then.

Great photo's.

the mill you plan on putting up in that field....is it going to be a home made or a comercial unit.

Looks liek fun way up there...

Bruce S · « **Reply #3 on:** March 15, 2007, 08:52:10 AM »

RodN;

A bit off the subject. I just wanted to say thanks for bringing into todays gloomy, rain, soaked and gray overcast skies some absolutely beautiful!! Pictures!!

I am kinda glad Tom was too busy to clip these out.;-)

Curious, at 20Kw is this a home-brew one?

what are your current plans for the power generated and at what voltage are you working with?

Trees or not I'm ready for those beaches!!

Bruce S

asheets · « **Reply #4 on:** March 15, 2007, 09:09:57 AM »

On the subject of anemometry... you've got some pretty nice equipment there, but I'm afaid you may have obtained incorrect or misleading results.

I don't know the distance between your 2 measuring sites, your proposed mill site, and the coast... I will tell you in mesoscale and microscale meteorology terms that onshore/offshore breeze effect measurements are only valid up to about 1-5 miles inland (depending on terrain) on eastern coasts and 1-20 miles inland on western coasts. Plus, a lot of your shore breezes have vertical components that have to be addressed as well.

Plus, from the pictures, the topography and building structure features are a lot different in each of the pictures shown. Therefore, each location will have differing wind characteristics.

My suggestion to you is to install the anemometer, trivane, and recording gear (along with temperature, rain guage, sunlight and cloud meters, etc) at the chosen location for the generator and at the height that it will be running. Then leave the measuring devices in place for at least 1 year before making any final design decisions.

Titantornado · « **Reply #5 on:** March 15, 2007, 09:51:23 AM »

Dang! Those beach pictures are killing me. Looks nicer than any New Jersey beach. If that is an unacceptable beach, I'd really love to see the good ones!

Anyhow, I've been considering getting one of those brand loggers. I look forward to hearing about your results.

RodN · « **Reply #6 on:** March 15, 2007, 05:01:13 PM »

Asheets, you are absolutely right about micro-orography.

But whan i said i intend to install tower " a little" sout, i intended "very little". No more than 50-70 metres away, and in a perfectly flat terrain i don't think it will make so much difference.

The turbine will be (i hope, that depends on collected data) so near to the sea as the tower is, just beyind the beach.

And i intend to build the tower from 30 to 35 metres high. I think it is the minimum height for a 20 KW - 10 meters diameter rotor.

I place anemomether on the existing tower, to avoid building an expensive one without being sure it worth the money.

RodN · « **Reply #7 on:** March 15, 2007, 05:14:37 PM »

Here is a map of the area.

I drawed the stadium and the 4 towers. The one we intended to use is the south-east one. The red point is where the turbine will be placed.

willib · « **Reply #8 on:** March 16, 2007, 12:08:32 PM »

Hey TT ,i resemble that remark , you must mean the pix i took in the middle of last winter?

i was at the beach recently the wind was howling the ocean was super rough , huge waves , yeah i suppose those beaches DO look nicer, thats if you like warm temps , and beautifull sunny days < wink >

right now its sleeting ,with freezing rain and roads are slick

wpowokal · « **Reply #9 on:** March 17, 2007, 06:16:41 AM »

Loaded real quick for me!

allan

TomW · « **Reply #10 on:** March 17, 2007, 06:36:55 AM »

Alan;

Thats because he apparently uploaded resized pics after I commented. The google earth one was like 700Kbytes and the others were smaller than that but larger than we like.

A trick some don't know is if you delete your original file and upload a new file with same name they replace the originals in the Story.

Its OK lots of folks think I am an idiot, anyway. My comment on file sizes will just reinforce that. If you had not replied to my comment I would of removed mine. Now folks will think nice, compact 88 K photos are "too big". tricky business this making everyone happy.

On with the show....

Cheers.

TomW

wpowokal · « **Reply #11 on:** March 17, 2007, 06:46:18 AM »

Tom that bit of advice about uploading files with the same name is valuable, I would never have guessed it. So at least he took notice of your advice and resized his pics, I would call that a win win.

allan

elvin1949 · « **Reply #12 on:** April 05, 2007, 05:05:33 AM »

TomW

Don't try to make everyone happy.All you will do

is make yourself go crazy.

Do what you think is right and don't worry about

what a few will say.

later

elvin

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