jueves, 27 de noviembre 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

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.

Stages of Geothermal Exploration
RECOGNITION
PREFEASIBILITY
FEASIBILITY
DEVELOPMENT
EXPLOITATION
Sup >10.000 km2
Sup 550 a 2000
Sup 10 a 15 km2


Research and tasks
geology 
Geochemistry 
Hydrology
geology 
Geochemistry 
hydrogeology 
geophysics 
shallow wells
Wells exploratory 

Studies reservoirs
wells exploitation 

systems driving 

Design plant
Operation plant 

Control field
Objectives sought
circumscribe 
areas with better 
possibilities
determine geothermal model 
preliminary and 
select 
location of the 
wells 
exploration
verify 
features 
reservoir 
and determining the 
coexistence 
technique and 
economical 
exploitation
create 
conditions 
for 
correct 
exploitation 
the 
site


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

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
representing 77% of energies of the sector
Second:
- Wind Energy

18 wind farms installed with a capacity of 65MW.
representing 12% of energies of the sector
Third:
- Biomass

- Solar Energy and Geothermal Energy
3 Biomass- energy facilities with a capacity of 58MW.

Overall, Solar and Geothermal Energy account for only 2MW
representing 11% of energies of the sector


Vocaroo Voice Message

Vocaroo Voice Message

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.

Fossil fuels
(coal,
oil and
natural gas):

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.
Hydroelectric power:


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.
Solar energy:


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.
Nuclear power:


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

b) energy sources that do not mention the book.Their PROS and CONS.

Biomass:

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
Wind energy: 



Geothermal:

Pro: energy obtained by tapping underground reservoirs of heat.
Ocean energy:
 Capture the energy contained in moving of water.