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Transcript of Geothermal Energy!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!
Is completely renewable
a significantlly less percentage of harmful emissions is let off opposed to coal.
lasts twice as long as conventional methods
free, renewable, and readily available
doesn't manufacture extra heat Con not easy to use
not always economical
only small amount of total heat is obtainable
makes up only 4% of the worlds energy intake
not easy to capture
cannot be accessed in National Parks How is the power produced? Flashed steam plants dry steam plants binary power plants
hybrid power plants most common type of geothermal plant
hot water boils into steam
the force of the steam moves a turbine, which powers a generator
the water is forced back into the ground to produce more steam very little water is used
steam is forced directly through the turbine generator
was the first kind of turbine The first kind used Tuscany, Italy 1904 hybrid power plants are a combination of flashed and binary systems.
provide 25% of Hawaii's energy pro's and con's It produces electricity used to
-heat homes and buildings
-provide hot water
-generate electricity Geothermal Energy
comes from..... Geothermal Energy binary power plants generate electricity at a lower temperature
lowest amount of heat loss (which makes the plant more efficient)
virtually NO water loss
least amount of emissions
works by transfering the steam into a fluid that boils at a lower temp.
most efficient out of the four types of Geothermal Power Plants. Geothermal Energy is USED for.....
Ancient uses modern day uses heating
drying fruits and vegtables
drying timber Naturally warm water can actually speed the growth of fish and food. early romans used geothermal water to treat eye and skin diseases.
They believed the naturally heated water had healing powers. Hot Srpings were used for....
heating Engineers drill an exploratory well if there is large amount of heat and water
the mechanics of it Blades of a Geothermal Turbine
$0.05/hr Geothermal Energy geothermal energy is created by converting steam (hot water) from deep beneath the earth's surface into electricity. they put pipes leading from the heat source and the water to a power plant Inside the power plant they force the steam into a turbine which turns and creates mechanical energy. This energy is then transferred into a generator.
This allows the energy to be converted into a usable form. (Electricity) Why is this better? Most alt. energy sources are used to create heat, used to boil water, which then runs a turbine. Geothermal energy is natural heat that comes straight from the earth! Earth's geothermal energy originates from
-the original formation of the planet
-solar energy absorbed at the surface. geothermal gradient - the difference in temperature between the core of the planet and its surface
drives a continuous conduction of thermal energy in the form of heat from the core to the surface. This heat is excessable at tectonic plate boundaries and where volcanic activity is high. Examples... This electricity then goes directly into homes. The electricity generated can also help run electric cars. Digging to the heat sites can destroy land and cause runoff. If done incorrectly, returned water could be contaminated. Where is it available? Hydrothermal resources - reservoirs of steam or hot water - are available primarily in the western states, Alaska, and Hawaii. $1.20/day $500/year Efficiency A functioning plant will create energy 90% of the time.