miércoles, 24 de septiembre de 2014
jueves, 7 de agosto de 2014
Summary of "Geothermal Energy" (PART 3)
Summary of "Geothermal Energy"
Geothermal Energy: Geothermal energy is defined as one that, by using the heat that can be extracted from the earth's crust, is converted into electrical or heat energy for human use, industry and agriculture.
Thermal manifestations: They have very singular characteristics that differentiate them sensitively to outcrops watering. Their names and characteristics:
- Fumarolas: Generic name given to the emission of gases and vapors at very high temperatures can sometimes reach 500 ° C. They are usually differentiated based on their chemical composition in carbonate, sulfur, clorhídricas, etc.
- Solfataras: Make up a variation of the above that is distinguished by its greater water vapor rich in substantially lower temperature (below 200 ° C) and for ejecting intermittent steam jets, hydrogen sulfide, carbon dioxide and other gases.
- Geysers: real dispensers consist of a mixture of water and steam (at temperatures between 70 and 100 °C) with a large amount of dissolved salts and suspended.
Resource utilization: The oldest use of geothermal resources, more precisely from the hot springs, has to do with their healing properties (Greeks, Romans, Babylonians, etc.)
Are famous thermal baths of Vichy in France, Czechoslovakia Carlsbad, Carcalla in Italy. In our country there are many places with hot springs and some of them are used from the tourist point of view and healing. Copahue are famous in Neuquen, Rio Hondo in Santiago del Estero, Jujuy Reyes, Villavicencio in Mendoza, Rosario de la Frontera in Salta, etc. They are also usable from the standpoint of mining, recovering by various processes containing dissolved salts and in some cases are of high commercial value, such as salts of Boron, Lithium, Cadmium. Although, the most important use of hydrothermal resources is its use for energy purposes
Geothermal Energy: Geothermal energy is defined as one that, by using the heat that can be extracted from the earth's crust, is converted into electrical or heat energy for human use, industry and agriculture.
Thermal manifestations: They have very singular characteristics that differentiate them sensitively to outcrops watering. Their names and characteristics:
- Fumarolas: Generic name given to the emission of gases and vapors at very high temperatures can sometimes reach 500 ° C. They are usually differentiated based on their chemical composition in carbonate, sulfur, clorhídricas, etc.
- Solfataras: Make up a variation of the above that is distinguished by its greater water vapor rich in substantially lower temperature (below 200 ° C) and for ejecting intermittent steam jets, hydrogen sulfide, carbon dioxide and other gases.
- Geysers: real dispensers consist of a mixture of water and steam (at temperatures between 70 and 100 °C) with a large amount of dissolved salts and suspended.
Resource utilization: The oldest use of geothermal resources, more precisely from the hot springs, has to do with their healing properties (Greeks, Romans, Babylonians, etc.)
Are famous thermal baths of Vichy in France, Czechoslovakia Carlsbad, Carcalla in Italy. In our country there are many places with hot springs and some of them are used from the tourist point of view and healing. Copahue are famous in Neuquen, Rio Hondo in Santiago del Estero, Jujuy Reyes, Villavicencio in Mendoza, Rosario de la Frontera in Salta, etc. They are also usable from the standpoint of mining, recovering by various processes containing dissolved salts and in some cases are of high commercial value, such as salts of Boron, Lithium, Cadmium. Although, the most important use of hydrothermal resources is its use for energy purposes
DIRECT USE OF HEAT, applied to heat homes or other buildings; industrial processes that use heat such as pulp mills, paper, canned fish meal; for drying fruits and vegetables in general; heating of greenhouses, stables and farms for fish farming, soil for crop heating in cold areas, to melt the snow off the roads. Is required for each of these applications the temperature of the water is suitable.
FLUID ELECTRIC USE. It consists in the generation of electricity by facilities similar to conventional power plants. The difference is the origin of the steam that drives turbines supplying the electrical generator.
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Stages of Geothermal Exploration
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RECOGNITION
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PREFEASIBILITY
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FEASIBILITY
| DEVELOPMENT |
EXPLOITATION
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Sup >10.000 km2
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Sup 550 a 2000
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Sup 10 a 15 km2
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Research and tasks
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geology
Geochemistry
Hydrology
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geology
Geochemistry
hydrogeology
geophysics
shallow wells
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Wells exploratory
Studies reservoirs
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wells exploitation
systems driving
Design plant
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Operation plant
Control field
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Objectives sought
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circumscribe
areas with better
possibilities
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determine geothermal model
preliminary and
select
location of the
wells
exploration
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verify
features
reservoir
and determining the
coexistence
technique and
economical
exploitation
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create
conditions
for
correct
exploitation
the
site
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A technology that, although it has been shown conclusively that operates flawlessly is rarely used, is the so-called "binary cycle". It consists of a plant in which the geothermal fluid produced by the wells vaporizes a 'working fluid "that is responsible for moving the turbine driving the generator. The secondary fluid meets a closed circuit.
Geothermal power in Argentina: While in Argentina there are over three hundred points of geothermal interest, only four of them could generate electricity with this resource: Copahue (Neuquén), Domuyo (Neuquén), Tuzgle (Jujuy) and Valley Cura (San Juan). In Copahue geothermal field, a central pilot generating electricity by using steam extracted from the earth's subsurface. It works by using isopentane binary cycle as intermediate working fluid
Law 26190 establishes "national scheme promoting the use of renewable energy for electricity production." The law declares of national interest the generation of electricity through the use of renewable energy bound for the provision of public service as well as research for technological development and manufacture of equipment for this purpose establishes objective of this scheme achieve the contribution of renewable energy sources up to eight percent (8%) of national electricity consumption within ten (10) years from the enactment of this regime.
miércoles, 6 de agosto de 2014
Renewable Energy Resources that are used in Argentina (part 2)
2) The energy sources listed above, occur at the following locations in Argentina:
- Patagonia: Wind Energy inexhaustible because of the strong winds that generates more energy.
- Argentine Northwest: Solar Energy, as the strong sun and installations the panels and solar cells generate more energy.
- Cordillerana Zone (San Juan, Mendoza, etc.): Geothermal Energy, this energy can be generated due to volcanic activity in the Andes mountains.
Also in this area you can generate biomass-energy.
- Littoral and Pampean Region: in these regions by being more urban, it can facilitate the generation of biomass-energy and Biofuels
- Patagonia: Wind Energy inexhaustible because of the strong winds that generates more energy.
- Argentine Northwest: Solar Energy, as the strong sun and installations the panels and solar cells generate more energy.
- Cordillerana Zone (San Juan, Mendoza, etc.): Geothermal Energy, this energy can be generated due to volcanic activity in the Andes mountains.
Also in this area you can generate biomass-energy.
- Littoral and Pampean Region: in these regions by being more urban, it can facilitate the generation of biomass-energy and Biofuels
Renewable Energy Resources that are used in Argentina (part 1)
1) Renewable Enegy Resources that are used in Argentina are:
| First: - Hydroelectric |
32 hydroelectric power station with a capacity of 428MW
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representing 77% of energies of the sector |
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Second:
- Wind Energy
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18 wind farms installed with a capacity of 65MW.
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representing 12% of energies of the sector |
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Third:
- Biomass
- Solar Energy and Geothermal Energy
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3 Biomass- energy facilities with a capacity of 58MW.
Overall, Solar and Geothermal Energy account for only 2MW
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representing 11% of energies of the sector
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miércoles, 18 de junio de 2014
martes, 17 de junio de 2014
jueves, 12 de junio de 2014
VIDEO 1: What is Energy? (definition of energy and sources of energy mentioned)
What is Energy?
Definition of energy: Energy is the ability to do work, the ability to cause motion and change.
(la energía es la capacidad para hacer el trabajo, la capacidad de hacer que el movimiento y el cambio)
Sources of energy mentioned: what kinds of energy are there? there´s nuclear, mechanical, solar energy, electrical, chemical, radiant, heat, light and magnetic
(¿qué tipo de energía hay? hay energía nuclear, mecánica, solar, eléctrica, química, radiante, el calor, luz y magnética )
VIDEO 2: Sources of energy:
Sources of Energy
a) sources of energy mentioned the book. Their PROS and CONS.
What is Energy?
Definition of energy: Energy is the ability to do work, the ability to cause motion and change.
(la energía es la capacidad para hacer el trabajo, la capacidad de hacer que el movimiento y el cambio)
Sources of energy mentioned: what kinds of energy are there? there´s nuclear, mechanical, solar energy, electrical, chemical, radiant, heat, light and magnetic
(¿qué tipo de energía hay? hay energía nuclear, mecánica, solar, eléctrica, química, radiante, el calor, luz y magnética )
VIDEO 2: Sources of energy:
Sources of Energy
a) sources of energy mentioned the book. Their PROS and CONS.
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(coal,
oil and
natural gas):
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Pro: One of the main advantages of fossil fuels is that they are
abundant. found in many places and in large amounts.
Con: All fossil fuels are essentially non renewable energy sources
because nature cannot create enough to keep up with demand. except the
natural gas, the fossil fuels produce pollutants.
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Hydroelectric power:
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Pro: the dams produce a great deal of needed electricity. there are
more than 2000 hydroelectric dams in the united states. they produce about 10
percent of the nation´s electricity
and produce,too , about 20 percent off the world´s electricity
Con: the flood prevention is good for people, but not so good for the
environment. the flooding produces sediments, which is a mixture of gravel,
sand and topsoil. when a river is dammed, it cannot renew the soil rich in
farmlands located near rivers. the dams also block the route for fish.
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Solar energy:
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Pro: the solar panel and solar cells produce lots of electricity and
heat. since the sun sends abundant free energy streaming toward earth 24
hours a day, people in many parts of the world.
Con: the first problem with solar cells is that they are very
expensive to manufacture.
the second problem is that not all areas of the world get abundant
sunlight.
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Nuclear power:
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Pro: the uranium releases an incredible amount of energy. one
kilogram (2.2 lbs) of uranium can produce more energy than 3 million
kilograms (6.6 lbs) of coal.
Con: many people oppose nuclear power because of its dangers. one
danger is the possibility of an accident, a nuclear power plant can´t explode
like an atomic bomb however it can have a steam explosion in the core (the
area containing the uranium) gets too hot
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b) energy sources that do not mention the book.Their PROS and CONS.
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Biomass:
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Pro: The biomass is a renewable source of energy, can be converted to
the other usable forms of like methane gas, or transportation fuels like ethanol and bio- diesel
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Wind energy:
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Geothermal:
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Ocean energy:
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miércoles, 11 de junio de 2014
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