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    Choose an interactive tour:

     Click
          here to tour a
     geothermal power plant




     Click
         here to take the
     Geothermal Energy Quiz!
Click on any element of the diagram for a further explanation
+




          Production
             Well
+
    The Production Well

   The production well is a well that taps into
    an underground reservoir of heated water
    that was heated by geothermal sources

   The hot water or steam is pumped to the
    surface through this well to be used in the
    later processes

   Drilling the production well is the most
    expensive part of building and running a
    geothermal plant

GO BACK:
+
    Separator

       The separator allows the hot water from the production well to
        separate into steam or water.

       The steam rises into the next chamber where the turbine is,
        and the water is either injected back into the ground or pumped
        somewhere for direct heating uses, depending on the type of
        power plant.

       The type of separator also depends on the heat of the water
        being pumped. If the water is pressured and superheated, then
        the separator is the flash chamber. However, if the water has
        relatively little heat and is use in a binary power plant, there is
        not separator at all
+
    Turbine and Generator

       This is how the process generates electricity. The rising steam
        spins a turbine, which is hooked up to a generator. The
        mechanical energy that is produced by the turbine then runs
        the generator, which produced electricity

       Usually, multiple turbines can be used, increasing the quantity
        of power generated

       This part of the process is very similar to other electrical
        generation systems, like coal power plants, nuclear power
        plants, and natural gas power plants. However, geothermal
        energy does not have most of the cons like the other systems
        do.
+
    Condenser

       Here, the steam that passed through the turbine is not
        condensed back into water so that it can be pumped around

       This requires a large amount of cooling water, so geothermal
        energy usually has to be near a river

       This part of the cycle also is where any leftover steam is
        released. This is the only thing emitted from geothermal power
        plants: steam. Otherwise, geothermal produces no harmful
        pollutants or greenhouse gases.
+
    Injection Well

       From here, the water is injected back into the well to be
        reheated by the hot rocks below the surface

       Sometimes, only water that was previously pumped from the
        same aquifer can be pumped back in. However, foreign
        sources of water can now be used in a process called hydro
        fracturing. For more information on hydro fracturing, see our
        science page on this website

       The drilling of wells, again, is the most expensive part of
        geothermal energy
+
    Geothermal Reservoir

       A geothermal reservoir is an aquifer of water that is heated by
        surrounding hot rocks

       It is the heated water that is used for electrical generation, not
        the actual geothermal heat itself

       Most geothermal reservoirs are a few miles below the earth’s
        surface, but most are also not very hot. An area with intense
        geothermal heat is ideal, because more power can be
        harnessed
+
    Geothermal Energy: Quiz

       Test how much you know about geothermal energy! Click here
        to start the quiz:
+
    Question 1

        In what ways can geothermal energy be used?

    1.     Electrical Generation

    2.     Heating Applications

    3.     Agricultural Applications

    4.     All of the above

    5.     Just answers 1 and 2
+
    Wrong!

       The correct answer was 4. All of the Above

       Click here to continue on to the next question:
+
    Correct!

       Geothermal energy can be used for electrical generation,
        heating, and agricultural applications

       Click to continue on to the next question:
+
    Question 2

    Which type of geothermal field is the most common?

    1.   Dry Steam Fields

    2.   Wheat Fields

    3.   Hot Water Fields

    4.   Wet Steam Fields
+
    Wrong!

       The correct answer was 3. Hot Water Fields

       Click here to continue to the next question:
+
    Correct!

       Hot water fields are the most common type of geothermal field.

       Click here to continue to the next question:
+
    Question 3

        How do geothermal energy power plants produce electricity?

    1.    By harnessing natural electric currents under the earths’
          surface

    2.    By harnessing geothermal heat in the form of steam that then
          spins a turbine

    3.    By harnessing geothermal heat in the form of steam that
          then passes directly through a generator
+
    Wrong!

       The correct answer was 2. By harnessing geothermal heat in
        the form of steam that then spins a turbine

       To continue on to the next question, click here:
+
    Correct!

       Geothermal power plants produce electricity by harnessing
        geothermal heat in the form of steam that then spins a turbine

       To continue on to the next question, click here:
+
    Question 4

        The household heating and cooling system that uses
         temperatures a few yards below the surface to control
         temperatures is…

    1.     One common form of geothermal energy

    2.     An indirect form nuclear energy

    3.     An old, outdated form of geothermal energy

    4.     Not really geothermal at all
+
    Wrong!

       The correct answer was 4. Not really geothermal at all

       To continue on to the next question, click here:
+
    Correct!

       That type of heating and cooling system, called geoexchange is
        not a real form of geothermal energy, contrary to common belief

       To continue on to the next question, click here:
+
    Question 5

        What is a binary power plant?

    1.    A power plant that uses conduction and a working fluid to
          spin the turbine

    2.    A power plant that uses steam to spin the turbine

    3.    A power plant that exclusively specializes in binocular
          production

    4.    A power plant that flashes steam which then spins the turbine
+
    Wrong!

       The correct answer was 1. A power plant that uses conduction
        and a working fluid to spin the turbine

       To continue on to the next question, click here:
+
    Correct!

       A binary power plant uses conduction from the hot
        hydrothermal sources to heat a secondary, working fluid, which
        vaporizes and spins a turbine

       To continue on to the next question, click here:
+
    Question 6

        Pumping down pressurized water to crack a rock, then filling
         the crack with small beads is a process called:

    1.     Fuel Fabrication

    2.     Hydrothermal locating

    3.     Water Injection

    4.     Hydro Fracturing
+
    Wrong!

       The correct answer was 4. Hydro Fracturing

       To continue on to the next question, click here:
+
    Correct!

       Hydro fracturing is the process of pumping down pressurized
        water to crack a rock, then filling the crack with small beads

       To continue on to the next question, click here:
+
    Question 7

        Why is geothermal technology considered to be advanced?

    1.    Geothermal technology has gone through significant testing
          and advances

    2.    Aliens gave us their geothermal technologies

    3.    Similar technologies from the petroleum industry have been
          highly developed and then converted to geothermal uses

    4.    A great deal of people are interested in geothermal energy,
          so they all try to improve its technologies
+
    Wrong!

       The correct answer was 3. Similar technologies from the
        petroleum industry have been highly developed and then
        converted to geothermal uses

       To continue on to the next question, click here:
+
    Correct!

       Advances in petroleum drilling technologies have influenced
        very similar geothermal drilling technologies

       To continue on to the next question, click here:
+
    Question 8

        Which of the following is NOT a con to geothermal energy?

    1.    Drilling wells can be very expensive

    2.    Geothermal power emits harmful gases into the air

    3.    A large amount of cooling water is needed

    4.    Geothermal power plants can be an eyesore
+
    Wrong!

       The correct answer was 2. Geothermal power emits harmful
        gases into the air

       This statement is not a con, because geothermal only releases
        mildly irritating gases if any, not harmful gases

       To continue on to the next question, click here:
+
    Correct!

       That statement is not a con, because geothermal only releases
        mildly irritating gases, if any, not harmful gases

       To continue on to the next question, click here:
+
    Question 9

        Where can harnessable geothermal heat be found?

    1.    In places with significant geothermal activity only a few miles
          below the surface

    2.    Only in places with a cold climate

    3.    In your own backyard!

    4.    The locations are random
+
    Wrong!

       The correct answer was 1. In places with significant geothermal
        activity only a few miles below the surface

       To continue on to the next question, click here:
+
    Correct!

       Geothermal heat is only found in places with geothermal
        activity only a few miles below the surface

       To continue on to the next question, click here:
+
    Question 10

        What was the first use of geothermal energy by people?

    1.    Electrical generation

    2.    Bathing and cooking in hot springs and geysers

    3.    Pumped heating systems

    4.    No one really knows
+
    Wrong!

       The correct answer was 2. Bathing and cooking in hot springs
        and geysers

       To finish the quiz, click here:
+
    Correct!

       The first use of geothermal energy by humans was bathing in
        hot springs and cooking with geysers

       To finish the quiz, click here:
+
    That’s the end of the quiz

       Feel free to retry it by clicking this button:



       Or, go back to the homepage here:

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Interactive Presentation

  • 1. + Choose an interactive tour:  Click here to tour a geothermal power plant  Click here to take the Geothermal Energy Quiz!
  • 2. Click on any element of the diagram for a further explanation + Production Well
  • 3. + The Production Well  The production well is a well that taps into an underground reservoir of heated water that was heated by geothermal sources  The hot water or steam is pumped to the surface through this well to be used in the later processes  Drilling the production well is the most expensive part of building and running a geothermal plant GO BACK:
  • 4. + Separator  The separator allows the hot water from the production well to separate into steam or water.  The steam rises into the next chamber where the turbine is, and the water is either injected back into the ground or pumped somewhere for direct heating uses, depending on the type of power plant.  The type of separator also depends on the heat of the water being pumped. If the water is pressured and superheated, then the separator is the flash chamber. However, if the water has relatively little heat and is use in a binary power plant, there is not separator at all
  • 5. + Turbine and Generator  This is how the process generates electricity. The rising steam spins a turbine, which is hooked up to a generator. The mechanical energy that is produced by the turbine then runs the generator, which produced electricity  Usually, multiple turbines can be used, increasing the quantity of power generated  This part of the process is very similar to other electrical generation systems, like coal power plants, nuclear power plants, and natural gas power plants. However, geothermal energy does not have most of the cons like the other systems do.
  • 6. + Condenser  Here, the steam that passed through the turbine is not condensed back into water so that it can be pumped around  This requires a large amount of cooling water, so geothermal energy usually has to be near a river  This part of the cycle also is where any leftover steam is released. This is the only thing emitted from geothermal power plants: steam. Otherwise, geothermal produces no harmful pollutants or greenhouse gases.
  • 7. + Injection Well  From here, the water is injected back into the well to be reheated by the hot rocks below the surface  Sometimes, only water that was previously pumped from the same aquifer can be pumped back in. However, foreign sources of water can now be used in a process called hydro fracturing. For more information on hydro fracturing, see our science page on this website  The drilling of wells, again, is the most expensive part of geothermal energy
  • 8. + Geothermal Reservoir  A geothermal reservoir is an aquifer of water that is heated by surrounding hot rocks  It is the heated water that is used for electrical generation, not the actual geothermal heat itself  Most geothermal reservoirs are a few miles below the earth’s surface, but most are also not very hot. An area with intense geothermal heat is ideal, because more power can be harnessed
  • 9. + Geothermal Energy: Quiz  Test how much you know about geothermal energy! Click here to start the quiz:
  • 10. + Question 1  In what ways can geothermal energy be used? 1. Electrical Generation 2. Heating Applications 3. Agricultural Applications 4. All of the above 5. Just answers 1 and 2
  • 11. + Wrong!  The correct answer was 4. All of the Above  Click here to continue on to the next question:
  • 12. + Correct!  Geothermal energy can be used for electrical generation, heating, and agricultural applications  Click to continue on to the next question:
  • 13. + Question 2 Which type of geothermal field is the most common? 1. Dry Steam Fields 2. Wheat Fields 3. Hot Water Fields 4. Wet Steam Fields
  • 14. + Wrong!  The correct answer was 3. Hot Water Fields  Click here to continue to the next question:
  • 15. + Correct!  Hot water fields are the most common type of geothermal field.  Click here to continue to the next question:
  • 16. + Question 3  How do geothermal energy power plants produce electricity? 1. By harnessing natural electric currents under the earths’ surface 2. By harnessing geothermal heat in the form of steam that then spins a turbine 3. By harnessing geothermal heat in the form of steam that then passes directly through a generator
  • 17. + Wrong!  The correct answer was 2. By harnessing geothermal heat in the form of steam that then spins a turbine  To continue on to the next question, click here:
  • 18. + Correct!  Geothermal power plants produce electricity by harnessing geothermal heat in the form of steam that then spins a turbine  To continue on to the next question, click here:
  • 19. + Question 4  The household heating and cooling system that uses temperatures a few yards below the surface to control temperatures is… 1. One common form of geothermal energy 2. An indirect form nuclear energy 3. An old, outdated form of geothermal energy 4. Not really geothermal at all
  • 20. + Wrong!  The correct answer was 4. Not really geothermal at all  To continue on to the next question, click here:
  • 21. + Correct!  That type of heating and cooling system, called geoexchange is not a real form of geothermal energy, contrary to common belief  To continue on to the next question, click here:
  • 22. + Question 5  What is a binary power plant? 1. A power plant that uses conduction and a working fluid to spin the turbine 2. A power plant that uses steam to spin the turbine 3. A power plant that exclusively specializes in binocular production 4. A power plant that flashes steam which then spins the turbine
  • 23. + Wrong!  The correct answer was 1. A power plant that uses conduction and a working fluid to spin the turbine  To continue on to the next question, click here:
  • 24. + Correct!  A binary power plant uses conduction from the hot hydrothermal sources to heat a secondary, working fluid, which vaporizes and spins a turbine  To continue on to the next question, click here:
  • 25. + Question 6  Pumping down pressurized water to crack a rock, then filling the crack with small beads is a process called: 1. Fuel Fabrication 2. Hydrothermal locating 3. Water Injection 4. Hydro Fracturing
  • 26. + Wrong!  The correct answer was 4. Hydro Fracturing  To continue on to the next question, click here:
  • 27. + Correct!  Hydro fracturing is the process of pumping down pressurized water to crack a rock, then filling the crack with small beads  To continue on to the next question, click here:
  • 28. + Question 7  Why is geothermal technology considered to be advanced? 1. Geothermal technology has gone through significant testing and advances 2. Aliens gave us their geothermal technologies 3. Similar technologies from the petroleum industry have been highly developed and then converted to geothermal uses 4. A great deal of people are interested in geothermal energy, so they all try to improve its technologies
  • 29. + Wrong!  The correct answer was 3. Similar technologies from the petroleum industry have been highly developed and then converted to geothermal uses  To continue on to the next question, click here:
  • 30. + Correct!  Advances in petroleum drilling technologies have influenced very similar geothermal drilling technologies  To continue on to the next question, click here:
  • 31. + Question 8  Which of the following is NOT a con to geothermal energy? 1. Drilling wells can be very expensive 2. Geothermal power emits harmful gases into the air 3. A large amount of cooling water is needed 4. Geothermal power plants can be an eyesore
  • 32. + Wrong!  The correct answer was 2. Geothermal power emits harmful gases into the air  This statement is not a con, because geothermal only releases mildly irritating gases if any, not harmful gases  To continue on to the next question, click here:
  • 33. + Correct!  That statement is not a con, because geothermal only releases mildly irritating gases, if any, not harmful gases  To continue on to the next question, click here:
  • 34. + Question 9  Where can harnessable geothermal heat be found? 1. In places with significant geothermal activity only a few miles below the surface 2. Only in places with a cold climate 3. In your own backyard! 4. The locations are random
  • 35. + Wrong!  The correct answer was 1. In places with significant geothermal activity only a few miles below the surface  To continue on to the next question, click here:
  • 36. + Correct!  Geothermal heat is only found in places with geothermal activity only a few miles below the surface  To continue on to the next question, click here:
  • 37. + Question 10  What was the first use of geothermal energy by people? 1. Electrical generation 2. Bathing and cooking in hot springs and geysers 3. Pumped heating systems 4. No one really knows
  • 38. + Wrong!  The correct answer was 2. Bathing and cooking in hot springs and geysers  To finish the quiz, click here:
  • 39. + Correct!  The first use of geothermal energy by humans was bathing in hot springs and cooking with geysers  To finish the quiz, click here:
  • 40. + That’s the end of the quiz  Feel free to retry it by clicking this button:  Or, go back to the homepage here: