July 6, 2010 By Tskan (0) Comment Categories:
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Renewable Energy

Energy availability of renewable energy sources is higher than conventional energy sources, but its use is rather limited.
The development of technology, increasing social demand for clean energy use, lower costs of installation and quick return, and control can be performed on production facilities utilities are pushing for a greater use of sources of energy from renewable sources in recent years.

Similarly, the question of sustainable development model and its shift towards a model of sustainable development implies a new conception of the production, transport and energy consumption.

In this model of sustainable development, renewable energies are considered inexhaustible energy sources, but they have the clean energy peculiariedad be defined by the following characteristics: their energy use systems are a low or no environmental impact Its use has not added potential risks, indirectly imply an enrichment of natural resources, the proximity of energy production centers to places of consumption may be feasible in many of them, and are an alternative to conventional energy sources, may generate a gradual process of replacing them.

Wind energy

The wind energy potential is estimated at twenty times the hydraulic energy. It is becoming increasingly concrete implementation through the farm-use zone and optimization in the use of new materials in the machines: wind turbines.

From stand-alone applications for water pumping, to the production of multi-MW wind farms. The environmental impact of wind farms is much lower than any conventional power producing plants, and aggression to the environment lies in the incidence of accidents of birds and the impact of large parks, issues can be minimized by properly studying location and distribution system. The location of the installation of wind energy use, wind speed and range constant will determine its productive capacity and autonomy.

The development of technology, increasing social demand for clean energy use, lower costs of installation and quick return, and control can be performed on production facilities utilities are pushing for a greater use of sources of energy from renewable sources in recent years.

Similarly, the question of sustainable development model and its shift towards a model of sustainable development implies a new conception of the production, transport and energy consumption.

In this model of sustainable development, renewable energies are considered inexhaustible energy sources, but they have the clean energy peculiariedad be defined by the following characteristics: their energy use systems are a low or no environmental impact Its use has not added potential risks, indirectly imply an enrichment of natural resources, the proximity of energy production centers to places of consumption may be feasible in many of them, and are an alternative to conventional energy sources, may generate a gradual process of replacing them.

Geothermal energy

The energy from the ground heat flux is likely to be exploited in the form of mechanical and electrical energy. It is an exhaustible energy source, although the volume of storage and extraction capacity can be assessed as renewable. Their environmental impact is reduced, and its applicability is based on the relationship between ease of removal and location.

The Hydro

It is estimated that the potential energy of water of all the earth is equivalent to 500 plants of 1000 MW each. In order to minimize environmental impact and promote the proximity of production sites to consumption, is being enhanced through greater use mini energy riverbeds and a gradual replacement of macrocentrales hydropower and environmental problems arising demographic. With respect to the energy available in the sea, is counting on major new projects for the use of both energy and tidal energy in the waves simultaneously taking advantage of the tides so that water turbine can be operated in the flow of ascension and fall of sea power as heat transfer, which consists in exploiting the temperature difference between surface and deep currents, which can reach up to twenty five degrees Celsius and is usable 24 hours a day.

The biomass energy

Is the energy contained in organic matter and has various forms of exploitation, depending on whether the matter of animal or vegetable. Only vegetable matter, it is estimated that annually produce two hundred million tons. The primary energy use of biomass is wood burning, which generates air pollution and a problem of desertification and erosion indirectly, unless done correctly forest planning. Organic wastes are also used mainly by chemical transformations, the most known applications of anaerobic digesters for organic detritus and the production of biogas from municipal solid waste. However, the increasing technological innovation of materials and equipment is establishing new systems of exploitation of farmers and forest residues, and consolidates a hopeful future in the line of biofuels, so that it can be compatible with sustainable agriculture production design energy that respects the environment.

Solar energy

It is the largest source of energy available. The sun provides a power of 1.34 kW / m² in the upper atmosphere. 25% of this radiation does not go directly to the ground due to the presence of clouds, dust, mist and fumes in the air. However, having appropriate energy sensors and only 4% of the surface of the planet desert capturing that energy could satisfy world energy demand, assuming a yield of those 1%. As comparative data with other major energy source, only three days of sun on earth provide as much energy as it can cause burning of existing forests and fossil fuels caused by plant photosynthesis (coal, peat and oil). The most important problem of solar energy systems is to have efficient utilization (uptake or transformation).

Three are the most developed systems of solar energy use:

1 .- The heating of water utility to provide heat and cooling, using flat plate collectors and evacuated tube mainly.
2 .- The production of electricity, using the photovoltaic effect. Since some materials have the quality of being excited at a photon lighting and create electricity (photovoltaic effect), a way to harness the radiation is to install photovoltaic cells and panels that provide electricity.
3 .- The use of solar energy in the building, also called "bioclimatic building," is to design the building taking advantage of the climatic characteristics of the area where you will locate and use materials that provide maximum performance to the radiation received, with In order to achieve set levels of thermal comfort for habitability.

Now, despite being the energy source more in line with the medium, inexhaustible and sufficient capacity to supply the energy needs of the planet, the solar energy utilization will resolve the conflict arising from the fact that occurs only during a certain time (throughout the day), and therefore the energy storage and the different systems to perform must be simultaneous.
 
Source: Environmental Resource Center Lapurriketa

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