Comments for earth4energy ebook

Comment on How to Generate Electricity From Wind? by Amgad A

Amgad A — Sat, 06 Mar 2010 06:27:59 +0000

its an easy way for electricity generation
i’ll tell u thing u can do it home
get a small motor from any ship toy and connect a led to it then rotate the motor using ur hand and look to the led ( it’s turn on ) .
its the same as the wind turbine but using the wind to rotate a big fan that connected to a generator that generate the electricity and there is more tools that enhance the output of the generator e.g a frequency stabiliser the adjust the frequency of the output coz the wind isn’t constant all day and night and that coz vibrations in the frequency ( unwanted thing in the output ) and so on.
and we didn’t work with one turbine but with field of them in a wide place ( desert ) to get more power.
References :
from reading .
little work in such project.
and working with a friend in his thesis.

Comment on How to Generate Electricity From Wind? by woppers83

woppers83 — Sat, 06 Mar 2010 06:25:59 +0000

Agreed, some well sited commercial wind farms operate at over 40% capacity.

Most commercial megawatt class turbines produce AC electricity, not DC. This does make storage nearly impossible for wind power to remain competitive. Some companies are working on storing excess power, or power generated at off-peak times, as compressed air stored in large natural reservoirs or abandoned gas wells.

Conventional plants are required because the wind doesn’t always blow. However, when power output from wind resources is high these plants operate in standby, and some (like natural gas fired plants, which can be quickly restarted) or other peak-load supplying stations completely shut down. There always needs to be a base load supplied by a conventional source. Obviously when running in standby they emit substantially less pollutants than when operating at full or even partial load, so wind turbines certainly are good for the environment.
References :
Me

Comment on How to Generate Electricity From Wind? by shannon t

shannon t — Sat, 06 Mar 2010 06:23:59 +0000

The turbine is connected to a generator, which produces electricity. More specifically, a generator creates DC (Direct Current). This can be used to charge a battery, supply DC devices, or run through a circuit called an "inverter" to convert it to AC (Alternating Current) and used to supply typical household appliances.

In many localities, a home wind turbine owner can connect the turbine to their house mains in such a way that when the turbine is generating more power than is currently being used, it feeds out through the electric meter (in effect crediting the owner for the power they’re generating) and into the grid.

p.s. ignore most of what Thorpe has to say – batteries are a perfectly functional means of storing power from a turbine (common setup for people living off the grid); a well located turbine can produce much more than "20% rated capacity"; there are many non-CO2-generating sources of electricity; by it’s nature, the demand and supply of the "grid" is constantly dynamic, and while current technology wouldn’t allow wind-generation to replace all other power sources, it can most certainly be used as a supplemental source (and is – in the U.S. and all over the world)
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Comment on Is Earth4energy a Scam? – Earth4energy Review by Long Dong

Long Dong — Sat, 06 Mar 2010 06:23:59 +0000

There's an easy way to tell if a site is not reliable: If they have a link on their page which goes directly to the sales page for the product, but is disguised in some way, they are making money as affiliates for that product and should not be trusted.
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Comment on How to Generate Electricity From Wind? by Thorpe-le-Soken

Thorpe-le-Soken — Sat, 06 Mar 2010 06:21:59 +0000

The wind turns the blades which turn a shaft that is connected via a gearbox to an alternator. The alternator is powered up (they use a little bit of electricity) and the rotation transferred from the blades of the turbine turns the alternator which generates electricity using electromagnets and coils inside it.

The wind is not constant so a wind turbine only produces, on average, about 20% of its rated output. So, when they say on the news that a wind farm will power 100 houses, they are talking about its rated output. What is will really power is 20 houses.

Unfortunately, there is no mass storage for electricity so it has to be used or dumped. Use means connecting it to the national grid. The trouble is that the national grid needs to stay roughly constant – you don’t want your lights going bright and dim or your TV going off and on – but wind power fluctuates wildly. The solution is to have conventional CO2 emitting power station running to create spare capacity to level out the uneven supply from wind power. When the standby power is not needed, the power station is wasting energy and producing pollution. So, wind power turns out to be much less environmentally friendly than it seems.
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Comment on How Electricity is Produced by Chris tf

Chris tf — Sat, 06 Mar 2010 06:21:59 +0000

If you move magnets it makes electricity.
References :

Comment on Is Earth4energy a Scam? – Earth4energy Review by Tom A

Tom A — Sat, 06 Mar 2010 06:21:59 +0000

What about DIY Green Energy?

I found a review here http://restivus.com/homemadenergy/diy-green-energy-review/ rating it higher than Earth4Energy.

Anyone have experience returning these products if they’re not what you expected?
References :
http://restivus.com/homemadenergy/diy-green-energy-review/

Comment on How to Generate Electricity From Wind? by novaboi24

novaboi24 — Sat, 06 Mar 2010 06:19:59 +0000

The wind turns the turbine. When the turbine turns it was connected to a magnet. The magnet is surrounded but a metal that when the magnet moves produces electricity. The electricty is travelled to grids then into your house to power lights ect. Hope this helps
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Comment on How Electricity is Produced by Answers R Us

Answers R Us — Sat, 06 Mar 2010 06:19:59 +0000

Its down to the fact that if you move a conductor in a magnetic field you induce a flow of electrons.
If you take the turbine shaft and put a series of magnets on it, you can then put this shaft inside a series of copper coils, as you turn the shaft the coils will produce a voltage.
As the magnets turn though you get voltage one way then the other (AC – Alternating Current) – this is fine for mains power though.
The number of coils, the spacing and the size of the magnets all affect the overall voltage and also the speed of the turbine.
You can demonstrate the effect if you have a galvanometer (a very sensitive volt meter) – connect it to each end of a copper wire about 6 or 9 inches long, pass the wire between the North and South poles of a magnet and watch the meter show a response.
References :

Comment on Is Earth4energy a Scam? – Earth4energy Review by William B

William B — Sat, 06 Mar 2010 06:19:59 +0000

yep most are,
what they don,t tell you is it requires a lot of batteries, a transfer switch and a large inverter, and a heavy wire to carry the DC currant $ $$$$$$$$
References :
maint man/old timer