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Apple Receives Regulatory Approval for 20-Megawatt Solar Farm at North Carolina Data Center

koolmagicguy

koolmagicguy

macrumors 6502
Feb 19, 2012
375
335
New York
JoEw said:
Is 20 mega watts a lot?
Click to expand...

There are 1,000 kW in one MW.

The average American home uses 29 kW per day or 10,600 kW per year. Some use more, some use less.

The plant could power a small city of 5-8 thousand homes every year.

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iMacoo7 said:
Its enough to power to keep things up and running for a good while if need be.
1 Megawatt = 106 watts
Click to expand...

You're off by only a few hundred. 1,000 kW in one MW.
 
Gav2k

Gav2k

macrumors G3
Jul 24, 2009
9,216
1,608
iZac said:
Great news that Apple are paving the way for responsible electrical generation!

Does anyone else find it amusing that a Solar farm is to begin operations on December 21st ... Winter Solstice - the shortest day of the year?
Click to expand...

Best day to launch for several reasons really. Main one would be its the day the would get the lowest output. This allows batteries etc to be brought up to charge in a safer manner.
 
theBB

theBB

macrumors 68020
Jan 3, 2006
2,453
3
bobr1952 said:
So true. I am all for protecting the environment and all that but really--couldn't Greenpeace have find a better target than Apple? I mean regardless of how much energy the data center may use, it still has to be way down on the list of environmental polluters. But it is good to hear they will have a solar farm there to help with the power load. :)
Click to expand...
So sad... When I was growing up, they were protesting factories discharging untreated toxic waste into rivers and nuclear bomb tests that were releasing radioactivity into the atmosphere. Now, they are reduced to sensationalist hit pieces attacking whomever would get them more page views, while there are still tons of factories in the third world spewing real toxic waste into the water and air.
 
velocityg4

velocityg4

macrumors 604
Dec 19, 2004
7,329
4,717
Georgia
BassPlayer said:
Forgive my ignorance, but is 20 megawatts a constant? Is it peak production? Is it over time? And just how much is the data farm expected to require? Will this 20 megawatts completely supply the data farm, essentially becoming self-sufficient, or is it still going to require electricity from "the grid"?

It sounds good, but exactly what are we talking about here?:confused:
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Typically solar wattage is rated at peak sunlight. The average hours can vary greatly by region based on average cloud cover, day length and so forth. From the chart I have seen in NC it is 3 to 3.9 hours. There more usable hours they just are not as efficient.

The rest is all assumption. If their intention is to be 100% green and off the grid. Then this solar farm should be sufficient for electrolysis of water into hydrogen an oxygen. The hydrogen could then be used to fuel the fuel cells. Heck they could get even more return by using the fuel cell exhaust to heat boilers for a steam engine.

5 megawatts could run a lot of computers and hard drives along with an HVAC system and other neeeded systems.
 
J

JAT

macrumors 603
Dec 31, 2001
6,473
124
Mpls, MN
TxLoneRider said:
Oh, and a backup power source. Since their is no way to store that much power.


But correlates very poorly with home charging of electric vehicles, and person energy use.
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This is why nearly all solar installations are attached to the grid. The excess power at noon simply goes into the city's grid and helps out. Your average home with solar sells electric all day and buys it all night. The plan (as in, how many panels to put up) for the individual is to come out even on price so you have no electric bill. Over the year, that is.
 
M

marcusj0015

macrumors 65816
Aug 29, 2011
1,024
1
U.S.A.
JoEw said:
Is 20 mega watts a lot?
Click to expand...

It's able to power ~250,000 servers, you tell me.

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velocityg4 said:
Typically solar wattage is rated at peak sunlight. The average hours can vary greatly by region based on average cloud cover, day length and so forth. From the chart I have seen in NC it is 3 to 3.9 hours. There more usable hours they just are not as efficient.

The rest is all assumption. If their intention is to be 100% green and off the grid. Then this solar farm should be sufficient for electrolysis of water into hydrogen an oxygen. The hydrogen could then be used to fuel the fuel cells. Heck they could get even more return by using the fuel cell exhaust to heat boilers for a steam engine.

5 megawatts could run a lot of computers and hard drives along with an HVAC system and other neeeded systems.
Click to expand...

And they could sell the Oxygen to an Oxygen bottling company.
 
T

TofuDog

macrumors newbie
Oct 18, 2007
2
0
TxLoneRider said:
Really, 20 MegaWatt, is likely peek capacity at time of manufacture.

Solar panels can loose up to 10% of their rated value per year. They also need to be cleaned and will require maintenance.

Baloney.
Every photovoltaic panel sold today is guaranteed to deliver >90% of rated power for 20 or 25 years (depending on manufacturer), and 20 MW is a lot of power, which will only increase for the first 6 mos. of operation (as it's targeted to come online at the winter solstice)
Click to expand...
 
M

manu chao

macrumors 604
Jul 30, 2003
7,219
3,031
koolmagicguy said:
The average American home uses 29 kW per day or 10,600 kW per year. Some use more, some use less.
Click to expand...
You almost certainly meant kWh not kW. A 20 MW photovoltaic power plant might produce at most 200 MWh per day, ie, using your numbers, supply roughly 7000 households with electricity (ignoring the storage issue).
 
-hh

-hh

macrumors 68030
Jul 17, 2001
2,550
336
NJ Highlands, Earth
basesloaded190 said:
And yet, Greenpeace will find something to complain about with this.
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Mostly the lack of being given advance notice from Apple in order for Greenpeace to then try to claim credit for it ...


20MW = 20,000 kW; which if assuming 8 'full' hours of sun per day for production, would be 160,000kW-hrs/day. Compared to a typical home (rounded up to 30kW-hr/day), this would power 5000+ homes (ignores losses from power storage for overnight, etc).


-hh
 
ctdonath

ctdonath

macrumors 68000
Mar 11, 2009
1,592
629
basesloaded190 said:
And yet, Greenpeace will find something to complain about with this.
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Of course. All that solar energy used to enter the environment, providing warmth & light to whatever lived on/in/under those many acres. Now with "solar strip mining" everything there will die from lack of energy, just so you can "Match" your songs among various luxury devices. As green energy sources are being rolled out into major production, we're finding they do have negative effects on the local environment when implemented on any meaningful scale.

Just facts. I don't have a problem with it. Greenpeace will.

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One Bad Duck said:
If its a power plant - lol - why do they have so many lights on - Turn all those little lanterns at the front off and you've already saved a few watts.
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Those lamps consume less than 0.05% of the plant's output. Let 'em indulge in a little luxury (or are you going to give up your iDevices?).

A dark power plant just looks ... wrong.
 
FloatingBones

FloatingBones

macrumors 65816
Jul 19, 2006
1,486
745
TxLoneRider said:
Really, 20 MegaWatt, is likely peek capacity at time of manufacture.
Oh, and a backup power source. Since their is no way to store that much power.
Click to expand...

This article talks about their biofuel (essentially natural gas from animal source) generators. Apparently, the rules say it's OK to burn a fossil fuel -- as long as the fuel isn't coming from fossil sources.

Seriously, solar panel energy capture does correlate well with industrial power peeks somewhat well, and correlates well with air conditioning needs and charging electric cars at work.
Click to expand...

That should be the case here: the biggest loads will be the removal of heat from the plant.

Welcome to the MR forums, TxLoneRider.

--phil
 
A

alephnull12

macrumors regular
Jan 13, 2012
180
0
So much for "insanely great products." What a waste of money. This company has lost its discipline and will surely go down the tubes over the next ten years.
 
Z

ZooCrewMan

macrumors member
Sep 3, 2007
84
0
Northridge, CA
Author, would you kindly stop over-using the words official and officially? They superfluous. Had there been an "unofficial" approval? No. Had there been any "unofficial" applications? No. Try just saying "The application was approved."
The same thing goes for when Apple releases a product. It's not necessary to say "Apple today officially released the iPhone 5." As Apple doesn't unofficially release products or updates, there is no need to say officially. Thanks.
 
I

iAshley

macrumors member
Feb 22, 2011
76
10
JoEw said:
Is 20 mega watts a lot?
Click to expand...

Kilowatt, 1,000 watts
Megawatt, 1,000,000 watts
Enough to power over 16,000 60 watt light bulbs.
20 megawatts could power over 333,000 60 watt light bulbs
Or like the article says over 10,000 homes.
 
T

TMay

macrumors 68000
Dec 24, 2001
1,520
1
Carson City, NV
ctdonath said:
Of course. All that solar energy used to enter the environment, providing warmth & light to whatever lived on/in/under those many acres. Now with "solar strip mining" everything there will die from lack of energy, just so you can "Match" your songs among various luxury devices. As green energy sources are being rolled out into major production, we're finding they do have negative effects on the local environment when implemented on any meaningful scale.
Click to expand...

Uhm, no.

Here's a calculation. (7,926 mi/2)2 x 3.14159 is the area of the disk of incident light on the earth.

Which is about 49 Million square miles. Apple's stated solar installation is on a parcel of 170 acre or about 1/4 square mile. Even then, you would still need to have the surface area perpendicular to the sun of the whole installation of panels to really do an accurate calculation. I assumed that 100 percent of the panels are perpendicular to the sun and that there is 170 acre of coverage just to be conservative on the calculation.

.25 / 49 million which approximates 1 part in 200 million, which is pretty darn insignificant.

And that doesn't take into account inefficiencies of the solar panel.

Next you will want to tell me about how a Hummer is more energy efficient than a Prious, which by the way it isn't.
 
ctdonath

ctdonath

macrumors 68000
Mar 11, 2009
1,592
629
TMay said:
Uhm, no. ... pretty darn insignificant.
Click to expand...

Yeah, it's insignificant on a large scale. Doesn't bother me - but Greenpeace will latch onto it anyway.

My point (well, the point which Greenpeace will make) is that 170 acres will now be covered with opaque panels, which both shades the area (depriving everything thereunder from light), and by converting some percentage to electricity siphons off some energy from any ambient heating effects thus cooling the area further. Yeah, it's not an appreciable fraction of the earth's disc, but whatever lived on that 170 acres will be affected. And this is not taking into account the environmental impact of making a quarter-square-mile of solar panels.

They're making a comparable fuss about wind farms, so expect the same here. Deployed on a meaningful scale on par with national/world electricity consumption, there will be non-trivial negative environmental effects.

I think the consequences are worth it.
I want a Hummer too, and make no bones about it being less energy efficient than a Pious.
 
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