BY: INÉS HIGUERAS FERNÁNDEZ. ANA RUIZ MONTEJO. MARÍA VÁZQUEZ RODRÍGUEZ.
What is Geothermal energy?• Geothermal energy is thermal energy gerenated and store in the Earth.
Geothermal Energy on nature• We can see some examples of geotermal energy on:• Geysers• Thermal Sources• Volcanoes
Uses of Geothermal energy.• Electricity• Heating water• Agriculture and aquaculture• Extraction of minerals• Spas
Types of Geothermal deposits.• The geothermal deposits can be clasificated depending of their fluid’s temperature: - High temperature deposits: Their fluids temperature is between 150 & 400 ºC. They are used to generate electricity. - Medium temperature deposits: Their fluids temperature is between 70 & 150 ºC. They are used to generate electricity too.
- Low temperature deposits: Their fluidstemperature is between 50 & 70 ºC. They areused only for thermal sources - Very low temperature deposits: Their fluidstemperature is between 20 & 50 ºC. They areused for home heating.
Types of geothermal power plants.• Geothermal power plants can be clasificated depending of how does they take the vapour from the liquid: - Conventional:
Advantages.• It is a source that would avoid dependence on foreign energy.• It is an inexhaustible source of energy.• The wastes it produces are minimal and cause less environmental impact than those originated from oil, coal...• Geothermal resources are greater than the resources of coal, oil…• The emission of CO2, with increased greenhouse effect, is less than that would be issued for the same fuel energy.
Disadvantages.• Emission of hydrogen sulphide that is detected by its rotten egg odor, but in large amounts it doesn’t smelt and is lethal.• It doesn’t produce a lot of energy.• Large initial investiment.• CO2 emission increase greenhouse gases.• Contamination of nearby waters with substances such as arsenic, ammonia, etc.• Thermal pollution.• Deterioration of the landscape.• It cannot be transported.