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Old 03-30-2013, 10:56 AM
 
Location: North Idaho
22,531 posts, read 28,441,660 times
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Quote:
Originally Posted by DCforever View Post
On the roofs of buildings, not much.

I don't think you can get enough solar panels on the roof of one of those high rise apartment buildings in New York City to provide even a sliver of power to all the residents. That's not going to happen until there are some serious technological breakthroughs.
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Old 03-30-2013, 11:48 AM
 
Location: DC
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Quote:
Originally Posted by oregonwoodsmoke View Post
I don't think you can get enough solar panels on the roof of one of those high rise apartment buildings in New York City to provide even a sliver of power to all the residents. That's not going to happen until there are some serious technological breakthroughs.
The question was about a town of 50k not NYC.
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Old 04-02-2013, 11:44 AM
 
1,278 posts, read 1,058,593 times
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Quote:
Originally Posted by oregonwoodsmoke View Post
There is going to be limited solar until such time as the battery issue is solved. so, not an issue until then.

As for power plants, they will take plants off-line. Coal fired or diesel plants produce electricity on demand and electricity can travel for hundreds of miles before it is used. So a few smaller generating plants will still be left functioning.

The wind generation has issues, and is causing a problem already because it is not demand generated and electricity must be used as it is produced. There is no way to store large amounts of electricity.

The wind generators in Oregon are killing fish. Yes, that's right. They kill fish.

The amount of electricity they produced can't be controlled and the electricity must be used as it is produced. That means when the windmills produce too much, the hydro turbines must shut down. When the turbines are closed the diverted water stirs up silt and it kills the fish.

Too much of this alternate power stuff is just not well thought out, at all.
Thats strange, in every wind turbine farm I know the wind turbines are controlled and if they are producing too much they go into "Stall" and shutdown. When turbines are producing they are variable.

Every wind turbine I know can change the pitch or angle of attack on the blades.
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Old 04-02-2013, 12:29 PM
 
Location: Minnysoda
8,581 posts, read 8,499,106 times
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never work.....
the power density PV solar 36hp/acre (6.7 W/square meter) Find some town to cover itself with solar and cut the interconnect tie down then come brag about how good that crap is.....
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Old 04-02-2013, 12:31 PM
 
Location: Minnysoda
8,581 posts, read 8,499,106 times
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Quote:
Originally Posted by Werone View Post
Thats strange, in every wind turbine farm I know the wind turbines are controlled and if they are producing too much they go into "Stall" and shutdown. When turbines are producing they are variable.

Every wind turbine I know can change the pitch or angle of attack on the blades.
Only as a means of shutdown not as a means of speed control.
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Old 04-02-2013, 01:31 PM
 
Location: DC
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Quote:
Originally Posted by my54ford View Post
never work.....
the power density PV solar 36hp/acre (6.7 W/square meter) Find some town to cover itself with solar and cut the interconnect tie down then come brag about how good that crap is.....
Why would anyone do that? PV in a grid connected mode is a peaking technology.
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Old 04-02-2013, 01:34 PM
 
Location: DC
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Water turbines kill more fish than the bypass flumes.
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Old 04-02-2013, 02:47 PM
 
Location: Minnysoda
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SO lets do a little math...
If PV solar gives us approx.
36 hp per acre
36 hp = @26.85 kw
1000 kw or 1340hp= 1 megawatt
then 1 acre = @ 26.5 KW
10 acres = 265kw
30.77 acres = 1mw of electricity

The last I checked land in the upper midwest was pushin 10k per acre, finish the cost analysis yourselves....
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Old 04-02-2013, 04:19 PM
 
Location: DC
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The key to economic solar is to recognize that roof and shed tops are under utilized. A typical house with a south facing roof panel can support 4-5 kW of PV producing 7-8 MWh per year on peak. That's a significant portion of the home's electrical consumption for the year. Couple that with wind for night time generation and you have a renewable solution with very little land cost, assuming wind uses about 1 acre per turbine.
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Old 04-02-2013, 04:39 PM
 
1,278 posts, read 1,058,593 times
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Quote:
Originally Posted by my54ford View Post
SO lets do a little math...
If PV solar gives us approx.
36 hp per acre
36 hp = @26.85 kw
1000 kw or 1340hp= 1 megawatt
then 1 acre = @ 26.5 KW
10 acres = 265kw
30.77 acres = 1mw of electricity

The last I checked land in the upper midwest was pushin 10k per acre, finish the cost analysis yourselves....

Where are you getting your numbers? Last time I checked a mediocre panel was delivering 250 watts @ STC in a 60 cell polycrystalline panel that is approximately 17 Sq. Ft..

745 watts per H.P. thats only Three panels. THREE panels per horsepower, THREE TIMES SEVENTEEN is 51 SQ. FT. DC per HP.

36 HP per ACRE? An acre is 43,560 Square feet. Where do you get your data?

YOU DO THE MATH. 854 HP per ACRE.

Granted that is laying all the solar panels edge to edge.

Real word example:

http://ewh.ieee.org/cmte/substations...Fact_Sheet.pdf

THat is 1 MW or 1342 HP on 4.8 ACRES, or 279 HP per Acre. A long way from your 36 HP per Acre...

THat is for Solar Farm #1......................... in 2008!

Panels have much higher efficiencies nowadays.

Only a fool never changes his mind.
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