21 May 2009

Compressed-air-accumulating power plant

The invention:

Plants that can be used to store energy in the form
of compressed air when electric power demand is low and use it
to produce energy when power demand is high.

The organization behind the invention:

Nordwestdeutsche Kraftwerke, a Germany company

Power, Energy Storage, and Compressed Air

Energy, which can be defined as the capacity to do work, is essential
to all aspects of modern life. One familiar kind of energy, which
is produced in huge amounts by power companies, is electrical energy,
or electricity. Most electricity is produced in a process that consists
of two steps. First, a fossil fuel such as coal is burned and the resulting
heat is used to make steam. Then, the steam is used to
operate a turbine system that produces electricity. Electricity has
myriad applications, including the operation of heaters, home appliances
of many kinds, industrial machinery, computers, and artificial
illumination systems.
An essential feature of electricity manufacture is the production
of the particular amount of electricity that is needed at a given time.
If moment-to-moment energy requirements are not met, the city or
locality involved will experience a “blackout,” the most obvious
feature of which is the loss of electrical lighting. To prevent blackouts,
it is essential to store extra electricity at times when power production
exceeds power demands. Then, when power demands exceed
the capacity to make energy by normal means, stored energy
can be used to make up the difference.
One successful modern procedure for such storage is the compressed-
air-accumulation process, pioneered by the Nordwestdeutsche
Kraftwerke company’s compressed-air-accumulating power
plant, which opened in December, 1978. The plant, which is
located in Huntorf, Germany (at the time, West Germany), makes
compressed air during periods of low electricity demand, stores the
air in an underground cavern, and uses it to produce extra electricity
during periods of high demand.

Plant Operation and Components

The German 300-megawatt compressed-air-accumulating power
plant in Huntorf produces extra electricity from stored compressed
air that will provide up to four hours per day of local peak electricity
needs. The energy-storage process, which is vital to meeting very
high peak electric power demands, is viable for electric power
plants whose total usual electric outputs range from 25 megawatts
to the 300 megawatts produced at Huntorf. It has been suggested,
however, that the process is most suitable for 25- to 50-megawatt
The energy-storage procedure used at Huntorf is quite simple.
All the surplus electricity that is made in nonpeak-demand periods
is utilized to drive an air compressor. The compressor pumps air
from the surrounding atmosphere into an airtight underground
storage cavern. When extra electricity is required, the stored compressed
air is released and passed through a heating unit to be
warmed, after which it is used to run gas-turbine systems that produce
electricity. This sequence of events is the same as that used in
any gas-turbine generating system; the only difference is that the
compressed air can be stored for any desired period of time rather
than having to be used immediately.
One requirement of any compressed-air-accumulating power
plant is an underground storage chamber. The Huntorf plant utilizes
a cavern that was hollowed out some 450 meters below the surface
of the earth. The cavern was created by drilling a hole into an
underground salt deposit and pumping in water. The water dissolved
the salt, and the resultant saltwater solution (brine) was
pumped out of the deposit. The process of pumping in water and removing
brine was continued until the cavern reached the desired
size. This type of storage cavern is virtually leak-free. The preparation
of such underwater salt-dome caverns has been performed
roughly since the middle of the twentieth century. Until the Huntorf
endeavor, such caves were used to stockpile petroleum and natural
gas for later use. It is also possible to use mined, hard-rock caverns
for compressed-air accumulation when it is necessary to compress
air to pressures higher than those that can be maintained effectively
in a salt-dome cavern.
The essential machinery that must be added to conventional
power plants to turn them into compressed-air-accumulating power
plants are motor-driven air compressors and gas turbine generating
systems. This equipment must be connected appropriately so that
in the storage mode, the overall system will compress air for storage
in the underground cavern, and in the power-production mode, the
system will produce electricity from the stored compressed air.
Large compressed-air-accumulating power plants require specially
constructed machinery. For example, the compressors that
are used at Huntorf were developed specifically for that plant by
Sulzer, a Swiss company. When the capacity of such plants is no
higher than 50 megawatts, however, standard, readily available
components can be used. This means that relatively small compressed-
air-accumulating power plants can be constructed for a reasonable


The development of compressed-air-accumulating power plants
has had a significant impact on the electric power industry, adding to
its capacity to store energy. The main storage methods available prior
to the development of compressed-air-accumulation methodology
were batteries and water that was pumped uphill (hydro-storage). Battery
technology is expensive, and its capacity is insufficient for major,
long-term power storage. Hydro-storage is a more viable technology.
Compressed-air energy-storage systems have several advantages
over hydro-storage. First, they can be used in areas where flat terrain
makes it impossible to use hydro-storage. Second, compressedair
storage is more efficient than hydro-storage. Finally, the fact that
standard plant components can be used, along with several other
factors, means that 25- to 50-megawatt compressed-air storage plants
can be constructed much more quickly and cheaply than comparable
hydro-storage plants.
The attractiveness of compressed-air-accumulating power plants
has motivated efforts to develop hard-rock cavern construction
techniques that cut costs and make it possible to use high-pressure
air storage. In addition, aquifers (underground strata of porous rock
that normally hold groundwater) have been used successfully for
compressed-air storage. It is expected that compressed-air-accumulating
power plants will be widely used in the future, which will
help to decrease pollution and cut the use of fossil fuels.

See also : Alkaline storage battery; Breeder reactor; Fuel cell; Geothermal
power; Heat pump; Nuclear power plant; Tidal power plant.


Anonymous said...

Hi tҺere, I enjoy reading tҺrough youг post.
I lіke tߋ write a little сomment tօ support you.

Μy website: 3ds emulator download

Anonymous said...

Аppreciate tɦis post. Let mе tгy it out.

Visit mу web site; sportsbet

Anonymous said...

This info is worth everyone's attention. How can I find out more?

Feel free to visit my web page - candy crush saga level 70 cheat walkthrough

Anonymous said...

I love your blog.. very nice colors & theme. Did you create this website yourself or did you hire someone to do it for you?

Plz answer back as I'm looking to design my own blog and would like to know where u got
this from. kudos

Feel free to surf to my homepage; best supplement to burn fat and build muscle

Anonymous said...

It's awesome to go to see this website and reading the views of all mates concerning this post, while I am also keen of getting familiarity.

my weblog :: Www.Reliablesnowplowing.com

Anonymous said...

Heplo my friend! I want to say that this article is amazing, nice written andd come
with almost all impoortant infos. I'd like to peer extraa postts like this .

my blog followers on instagram for free

Anonymous said...

The healthy condition of the hair depends, to a very large extent, on the
intake of sufficient amounts of essential nutrients in the daily
diet. Our sweat (containing uric and lactic acids) and body oils promote this acidic environment.
If you don't know, a pre-poo is a treatment you put on your hair before you shampoo it.

Here is my web-site - Darian Braun

Air Tool Guy said...

Thanks for sharing this compressed air accumulating power plant and Plant Operation and Components. I loved to read this review very much.

Shannon C. Ranson said...

With so many different air compressors available to choose from, finding the best one for your money can be difficult. To help you narrow down your choices, we have included brief reviews of some of the top air compressors available for your money. When anyone wants to buy a compressor should follow the best air compressor review.

Vigrx Plus said...


Jasmin said...
This comment has been removed by the author.
aircompressormartguru.com said...

air you looking for best air compressor . please visit my site

Jasmin said...

I liked your blog really. Especially, your post is wonderful. It seems to me that this blog is fulfill by many important information about "Compressed-air-accumulating power plant". Yet,you will get also information in the website- http://www.aircompressorreviews68.com/

Air compressor Hub said...

Well, compressed air is one of the best inventions.I love to discuss more and more about compressed air and air compressors. Ping me anytime for this topic and I am always ready. Thanks a bunch for sharing this great piece of information.

aircompressormartguru.com said...

DEWALT D55146 is a highly strong and robust device which is capable of airing a wide of products thus making work a breeze to finish off. The build quality and assembling of the air compressor is top notch which ensure that it can easily withstand the tear and wear of the working sites

Zenti@ sewing machine said...

I read that Post and got it fine and informative.

how to load a singer sewing machine said...

The budget laptops are for sale for their occasional or business venture fans. Rest room while using the light-users the organization operatives may also get the nice thing about choosing these sort of portable computers. Realistically, in development of these kinds of bargain-priced accessories a totally new depth has got combined with the business enterprise. You'll find large amount of value added firm focused characteristics have already been integrated the modern internet connected computers.

Air Compressor Price said...

Very interesting design! I have been passing by Huntorf many times and did not know about it.
What do they use a storage?

kevin kegan said...

Hey, at least you're honest about it. Still, adding the little saw holder and trays was a stroke of genius. Sometimes you just have to do what you can.

12 Zhengjx said...

converse sale
longchamp uk
sac longchamp
coach purses on sale
ray ban sunglasses
adidas superstars
white converse
hollister uk
timberland uk
coach factory outlet
chaussure louboutin
white converse
jimmy choo outlet store
michael kors bags
coach outlet online
kate spade new york
michael kors outlet
louboutin outlet
nike cortez shoes
asics running shoes
louboutin pas cher
coach outlet
nike air max 95
abercrombie & fitch
coach outlet store
michael kors outlet
polo ralph lauren outlet
cheap ray ban sunglasses
michael kors outlet online
oakley sunglasses wholesale
chi flat iron
kate spade outlet
ralph lauren
hermes belt
fitflops outlet
fitflops shoes
micahel kors
ray ban outlet
ralph lauren pas cher
bottega veneta shoes

林磊 said...

2016-5-12 leilei
coach outlet online
michael kors outlet
chaussure louboutin
lululemon outlet
toms outlet
coach outlet
cheap nike shoes
louboutin outlet
yeezy boost 350 black
versace sunglasses
sac longchamp pliage
cheap air max
micahel kors
michael kors bags
fitflops outlet
lacoste polo shirts
puma shoes
cheap jordans
fitflops sale
michael kors outlet clearance
adidas supercolor
adidas nmd
polo ralph lauren outlet
cheap ray-ban sunglasses
ray ban outlet
longchamp outlet
coach purses on sale
jordan shoes
cheap oakley sunglasses
nike tn pas cher
burberry handbags
louboutin pas cher
coach outlet
michael kors bags
nike cortez red
cheap oakley sunglasses
polo ralph lauren
ralph lauren outlet
air max

Abel Ahar said...

Here we present to introduce to all visitors in this great blog. and thank you for allowing me .

cara menggugurkan kandungan
obat aborsi
tanda tanda kehamilan

what is the best 18650 rechargeable battery for flashlight said...

The compressor's directions say that it should be plugged into a 15-amp circuit but don't list the actual amperage draw of the unit. Even if it drew the full 15 amps, which I'm sure it doesn't, that would be only 1800 watts (15 amps x 120 volts), within the capacity of your generator. Should work fine. What is the best espresso machine for lattes

Hames said...

Great article.

best cookware for ceramic glass cooktop said...

air you looking for best air compressor . please visit stainless steel cookware sets reviews.