Virtual Tracker panel arrangement

Getting into the nuts and bolts of wind and solar power components, installation and performance issues, ask technical questions, answers and tips

Re: Virtual Tracker panel arrangement

Postby davidg » Fri Jul 07, 2017 6:17 pm

Warpspeed wrote:My guess is the bought and paid for whore politicians will just introduce some new laws, such as forcing people to have electricity connected where it is available, just as you are forced to have water and sewer connections if they are available.


This is actually incorrect in Victoria, you do not have to have or pay for water or sewerage service, provided it is not physically connected and piped onto the property, I have had this confirmed by the water authority in our area. You will not find any information about this online anywhere because they really don't want to tell you or anyone that you can indeed not connect or you can disconnect. It does not stop the requirement to pay the "parks and gardens" charge if within the "ring" around greater Melbourne though.
SPS Standalone Power System/Hybrid specialist - Store the Sun!
SELECTRONIC SPMC482-AU, 8.2kW's of Arrays
Selectronic Certified AC-Coupled Fronius 8.2kW Inverter
1900Ah 48V Bank

An OTT Genset for a house.
PVOutput Stats

Sparkys light up your life :)
User avatar
davidg
Solar Crusader
Solar Crusader
 
Posts: 2091
Joined: Sat May 05, 2012 7:38 pm
Location: Dandenong VIC- *Really don't like Power Retailers at all.

Re: Virtual Tracker panel arrangement

Postby Warpspeed » Fri Jul 07, 2017 6:31 pm

I understood you simply cannot get new building plans approved for a septic system where there is a sewer line readily available.

You could be right, although I would be very surprised.
Warpspeed
Solar Crusader
Solar Crusader
 
Posts: 432
Joined: Fri Jan 03, 2014 3:18 pm

Re: Virtual Tracker panel arrangement

Postby davidg » Fri Jul 07, 2017 7:05 pm

Warpspeed wrote:I understood you simply cannot get new building plans approved for a septic system where there is a sewer line readily available.

You could be right, although I would be very surprised.


I suspect it will depend on the space you have available. Blocks are getting so small that it may well be very very difficult to get approval for an on property septic style system.
SPS Standalone Power System/Hybrid specialist - Store the Sun!
SELECTRONIC SPMC482-AU, 8.2kW's of Arrays
Selectronic Certified AC-Coupled Fronius 8.2kW Inverter
1900Ah 48V Bank

An OTT Genset for a house.
PVOutput Stats

Sparkys light up your life :)
User avatar
davidg
Solar Crusader
Solar Crusader
 
Posts: 2091
Joined: Sat May 05, 2012 7:38 pm
Location: Dandenong VIC- *Really don't like Power Retailers at all.

Re: Virtual Tracker panel arrangement

Postby Monkeytom » Sat Jul 08, 2017 8:29 pm

davidg wrote:
I suspect it will depend on the space you have available. Blocks are getting so small that it may well be very very difficult to get approval for an on property septic style system.


My friend on acreage here on Gold Coast recently applied for a septic was told No he had to instal a bio cycle,
His wife checked the regs and after waving them in their face surprise surprise was told they could have a septic but needed soil tests, they now have a septic tank with no ongoing service fees like the other one.
Monkeytom
Solar Evangelist
Solar Evangelist
 
Posts: 69
Joined: Sun Nov 29, 2015 8:34 pm

Re: Virtual Tracker panel arrangement

Postby Chriswlan » Wed Jul 26, 2017 1:38 pm

Here is my take on the VT and my "VT-60" and "YearRoundVT-60" - with the goal of LONGEST CONSTANT POWER....

At the Equator, we'll all want 2 (pairs) sub-arrays kinda hinged book-like at the binding, upside down. With a 60 degree included angle. Which means the outside "aiming angle" difference is 120. 120 being one third of the earth daily revolution, we, at the Equinox, want each module to be perfectly square to the sun at EXACTLY 8 hours apart. Could use a square and its shadow on the panels for example; does NOT matter (much) if we get the first array square at 7am or 8am... The other one must be done 8:00 hours later to get the included 60 deg. We'll get the magic 60. If book is a little leaning off to one side we can easily adjust for balance.

If we are rather close to the Equator, we are done -at least for the Equinox, and as well best fit for the yearly seasons overall.

Now imagine a schoolroom earth globe, on its side, axis parallel to a desk. Have a mini book, folded cardboard, open at a fixed 60 deg, straddling the equator, and let's say you want to slide it slowly down the side of the globe, to a bit higher latitude -and keeping its binding parallel to the earth axis. Then as you move away from the Equator, the "binding" will assume a slope-to-grouind equal to the latitude. As far as the equinox is concerned we are done. The binding "spine" MUST remain parallel to the globe axis as the whole idea is to compensate for the globe rotation.

Lets now move all the way to the pole: we now have the "book" sitting upright on end (on the ice...). Still being the equinox as we have 24 hrs sun, might as well add a third array, and we end up with a 3-sided prism, equilateral, "bolted" around to the globe/earth shaft. 24 hrs of steady power, and simple school cosine will show that power is constant +- 7.2%.

Now bring that prism slowly down latitude again, carefully keeping its axis parallel to the earth's, and the side facing the ground becomes useless, and we again end up with the "inverted open book". But still with its spine elevated according to the latitude. Remember all the above is true at the equinox.


NOW, in my case of interest (2 deg latitude), I may want to get fancy and, AFTER trading some midday energy off for more at the 2 ends of the day, in the name of near constant day-long power with a "VT-60", I may now ALSO wish to trade a bit of equinox power to increase the solstices that are lagging. Again it is easy, with a very few percent more PV area, in the name of constant power. Near the equator, split your 2 main arrays in halves, (ie FOUR subs) and have their facing azimuths skewed a bit away from aiming down the equator... (ie put a kink mid-length) I'm guessing one set about 10-12 degrees one way and the other set the same the other way. That gives us only a very slight seasonal variation in addition to the 7.2 % theorical within ea day. This I call my "YearRound VT-60"...


Of course for the poor souls stranded on more meaningful latitudes with increasingly gross/yukky season extremes, I'd think the extremes get harder to compensate for (think about the impossibility at the pole during the winter...) with an end result of renouncing more and more energy in the pursuit of "seasonal power consistency". I'll let ya'll take my YearRound VT-60, slide it parallel to the earth axis, to your latitude, and figure out how to contort it all to compensate for even more difficult conditions. Given it is impossible at the pole, I'd think part way up real seasonal symetry is already impossible. Perhaps start with much increasing the *area* of the 2 sub arrays that favor the equator (for winter solstice), while keeping the exact same "YR VT-60" geometries? Ultimately at higher lats one ends up paying for several hundred percent oversize PV area, to get meaningful winter power; at 50 deg North, I even see a few modules in the country side that are slightly looking into the ground to shed snow ASAP, to catch a wee bit of winter sun.

My 3 cents

Christian

NB: Many thanks to Gordon who introduced me to the VT concept of trading off a wee bit of PV area for constant power. Perfect for water pumping etc at low lat's.
Chriswlan
Solar Supporter
Solar Supporter
 
Posts: 1
Joined: Wed Jul 26, 2017 11:17 am

Previous

Return to Components, Installation And Performance

Who is online

Users browsing this forum: No registered users and 3 guests

new solar power specials