Energy from Volcanoes

Energy from Volcanoes ppt. is the next topic/ lesson from grade 9 LM Module 1 Quarter 3. The presentation is a discussion guide for teachers about geothermal energy and gives video suggestions in order for the students to understand the lesson well especially in showing how geothermal energy is harnessed. Feedbacks, reactions and suggestions are very much welcomed. Thanks!

1. ENERGY FROM VOLCANOES Grade 9, Module 3 Lesson 1.2 (Teachers’ Guide for Discussion) MA . RACHEL B. ESPINO Teacher I, Science Buhatan NHS, Sorsogon City

2. Since our country is a home to more than a hundred of volcanoes, energy has been tapped from the. Actually, the Philippines ranked second in the world’s production of geothermal energy. Of the country’s total electricity production, 27% is generated in the power plants. The production of electricity from geothermal energy is cheaper than the electricity production using natural gas, coal and hydropower.

3. What is geothermal energy? The Earth is believed to be extremely hot from within. This heat from the Earth’s interior is a source of energy called geothermal energy. The heat of the Earth warms up water which is trapped in rock formations beneath its surface.

4. How is geothermal energy generated? Geothermal energy is generated in two ways: geothermal plants and geothermal heat pumps. They differ on the depth of heat source to produce energy.

5. GEOTHERMAL POWER PLANTS In geothermal power plants, the heat from deep inside the Earth is used to produce steam to generate electricity. This type of natural energy production is environmentally friendly and used in many geothermal hot spots around the world.

6. To harness the energy, deep holes are drilled into the earth (much like when drilling for oil) until a significant geothermal hot spot is found. When the heat source has been discovered, a pipe is attached deep down inside the hole which allows hot steam from deep within the earth’s crust to rise up to the surface.

7. The pressurized steam is then channelled into a turbine which begins to turn under the large force of the steam. This turbine is linked to the generator and so the generator also begins to turn, generating electricity. We then pump cold water down a new pipe which is heated by the earth and then sent back up the first pipe to repeat the process.

8. In the Philippines, geothermal power plants are used to generate electricity in Tiwi , Albay ; Kidapawan , North Cotabato ; Calacan , Laguna; Tongonan , Leyte and Bacon Sorsogon. The picture on the right shows BACMAN Geothermal Power Plant in the Bicol Region.

9. Video on how geothermal energy works http://youtu.be/Bl-oxDZDfqI

10. GEOTHERMAL HEAT PUMPS In geothermal heat pump, the pump is installed on a concrete pad above ground, close to the home. Holes are drilled through the earth for dozens or hundreds of feet. The depth depends on the location of geothermal energy pockets in your region. Two sets of piping are connected to the pump and fed underground. The pump pushes cool surface water down through the pipes. As it passes through the energy pockets, it is heated and returned to the surface. The heat pump uses an electric heat exchange unit to transform the hot water into hot air, which is used to heat the home.

11. Video on how geothermal heat pump works http://youtu.be/KE3SvNRmwcQ

12. Suggested Videos Mexus Education Pvt. Ltd .,: Geothermal Energy (it shows the production of geothermal energy through the presentation of the parts of the Earth. It also shows the origin and the uses of geothermal energy) http :// youtu.be/yrYEgJhLVNQ EDC’s Geothermal Power Plant (It presents the world’s largest geothermal power plant found in the Philippines. Most effective for Filipino students to develop nationalism and pride to our country as well as showing how a power plant works) http :// youtu.be/yrYEgJhLVNQ

13. Additional References/ Articles: http://www.clean-energy-ideas.com/geothermal/geothermal-power/geothermal-power-plant http:// www.ehow.com/how-does_4966724_geothermal-heat-pumps-work.html