Kw-logo-holiday

Geothermal Energy

The Earth is like an egg.
Geothermal Energy
A dry steam power plant in California.
Geothermal Energy

If you kept digging, what would you find? You'd probably find lots of worms, roots, and a few dog bones. But if you went really far down, you'd get geothermal energy.


Geothermal Energy - What Is Geothermal Energy?

If you take the word geothermal apart, you get "geo" which means earth and "thermal" which means heat, so geothermal means heat from the Earth. Geothermal energy taps into the Earth's internal heat to create electricity and to heat and cool buildings.


Geothermal Energy - A Look into the Earth

To get an idea of what Earth looks like, boil an egg and then cut it in half without peeling the shell. The yellow yoke is like the core of the Earth, the white part is the mantle of the Earth and the thin shell around the egg is the Earth's crust. The Earth's mantle consists of hot, liquid rock called magma (that's the stuff that shoots out of an erupting volcano) and the crust floats on this liquid.


If you're wondering what that has to do with geothermal energy, check this out: when water makes its way down close to the hot rock hundreds of feet below the surface, it turns to hot water or steam. The hot water can reach over 300 degrees Fahrenheit or 148 degrees Celsius - that's hotter than boiling water! This hot water from deep in the ground can be used to warm buildings, swimming pools and make electricity.


Geothermal Energy - Getting Steamy

Geothermal power plants use the steam from hot water to produce electricity. The steam rotates a turbine that activates a generator, which produces electricity. There are three types of geothermal power plants:

  • Dry Steam - The steam goes directly from underground wells to a power plant. The largest dry steam resource in the world is The Geysers, which is in California.
  • Flash Steam - These are the most common. They use reservoirs of water that are hotter than 360 degrees Fahrenheit (182 degrees Celsius). The hot water flows up wells in the ground under its own pressure and some of it turns to steam. This steam is separated from the water and used to turn a turbine.
  • Binary Cycle - These plants use water that is about 225 to 360 degrees Fahrenheit (107 to 182 degrees Celsius). The heat from the hot water is used to boil a working fluid (usually an organic compound that boils easily), which vaporizes in a heat exchanger (a device for transferring thermal energy from one fluid to another) and is then used to turn a turbine.

Geothermal Energy - Did U Know?

  • The US produces the most geothermal energy in the world.
  • In the US, geothermal electricity is generated in California, Nevada, Utah, Alaska and Hawaii.
  • Unlike wind and solar energy, geothermal resources are available 24/7.
Related Stories
>

readers voted!

Comments

colleenaw

colleenaw wrote:

Cool
commented: Wed Aug 28, 2013

Hannah The Awesome
I've read about this.
commented: Thu Mar 22, 2012

there are 2 more comments

Please login or register to add comments


like this article?
Sign up now to get more just like it!

latest videos

F1004141320046

What Gives You a Boost of Energy?

  • Caffeine does the trick for me.
  • 23 sugar cubes is usually enough.
  • A chocolate bar.
  • A raw egg and milk shake.

related stories

Micro_hydroelectricity-micro
It's hard to imagine that water can be used to create electricity. The two are a dangerous combin...
When someone passes wind it can be stinky and loud. Wind that has been put to work at wind farms ...
Micro_solar-power-micro
Will we be forced to start writing with a pen and paper when the world's fossil fuel deposits ru...

Random in the forums

shadowcyn
shadowcyn posted in Say Anything:
i hope most of my friends dont see this, but i doo!!
reply less than a minute
Scourgeheart
Ok, this is actually very accurate. Though, I will point out that I have been on here for almost 4 years, and I feel like the level between boys and girls is fairly equal. I will say, that recently, I believe there have been more girl newbies, but the matter of who you see around most, it cuts pretty close to a tie
reply 40 minutes
turtleygleeky02
So, this may be akward... but does anyone else physicly pleasure themselves?? Please reply.
reply 43 minutes
Boysrock50
"Demix" wrote: 6. The GuyLet's face it, a vast majority of KW consists of girls. Don't ask why, but it does, You are probably a girl reading this right now, and at some point we all meet a lesser spotted guy in the forums. You don't really know they're a guy unless they have a lamborghini for their profile picture. Then you get one in your roleplay, and since you're a little embarrassed to have smooching and girly talks with a REAL LIFE guy in the room, everyone rushes to make their character a tomboy. But soon you will realise that this guy is cool, and he may even become your best friend and you'll be on all the same RPs. Then it's a race to get your character to have a love story with his character. If you meet a guy before you get into RP, sometimes you'll become the dynamic duo that goes around flipping everyone off in the comment section like "WE DON'T GIVE A HOOT!". Basically, this guy is the firetrucking best. Guess who has always had a Lamborghini as a pic :D
reply about 1 hour
Luna2
Luna2 posted in General:
So school for 2014 has ended and a lot of you have probably had your graduation. I had mine and hugged all my friends at the end and cried afterwards. I was wondering, who else has cried at or after their graduation? It's actually sad because you realise you're probably never going back there again and if you were in Primary School and most of or even all of your friends are going to different high schools, you're probably never going to see them at school again.
reply about 1 hour

play online games

Hour-of-code-tumb

Codey the troll is lost! Help him avoid obstacles and get back into the computer...

Candy-quest-feature

Your troll is lost! Help it avoid obstacles and get back into the computer.

Fo...

Dragon-dash

Your dragon must return to guard the treasure! Help it gather lost coins and avo...

_thumb_100x100

Shoot blobs with different properties to merge yellow blobs. Your blobs can be r...

1005_cc_kidz_100x100_vlh

Candy's got her candies into a terrible mess, can you help her to sort them out?

Candy-100

A great online version of the famous Candy Crush. This is the best game launched...

_thumb_100x100

Bloons 2 is here! A worthy and awesome sequel at last to our original Bloons gam...

Frostbox_100x100

Explore the world or hang out with friends in your own condo. Get a unique look,...