Today in the Blog of Renewable Energies want to continue talking about the importance of the advantages and disadvantages of renewable energy, which exert influence in our lives and how are necessary for the normal and healthy functioning of the Earth. In this case we talk about solar energy.
INTRODUCTION TO SOLAR ENERGY
When we talk of solar power, we refer to solar thermal and photovoltaic solar energy:
The solar energy is to heat a fluid using the energy of the sun, which would produce steam and then electricity. This is achieved by sensors or solar collectors.
In photovoltaics, sunlight would impact on a photovoltaic cell produces electricity directly.
ADVANTAGES OF SOLAR ENERGY
When we think of solar energy, there are many advantages that come to our head, it seems that this type of energy offers us every day with the sun and, being Spain a place so favored by this star, it becomes a type of energy that could be described as interesting.
The most important advantage of all is that this energy does not pollute.
When you’re talking of solar energy we can say that is an inexhaustible source.
It is a system of utilization of energy suitable for areas where the power line does not reach (rural, mountainous islands), or difficult and costly to transfer.
Solar collection systems that are frequently used are easy to maintain, which facilitates their choice.
You’ll save money as the technology progresses, while the cost of fossil fuels increases over time because more and more scarce.
The only investment is the initial cost of the infrastructure, as it requires no fuel to operate, and puada amortized over 5 years of its implementation.
Photovoltaic solar energy does not require any additional space to occupy, it can be installed on roofs and buildings.
The availability of solar energy reduces dependence on other countries for energy supply of the population.
It is a sector that promotes job creation, necessary for the manufacture of solar cells and panels as for installation and maintenance of the same.
DISADVANTAGES OF SOLAR ENERGY
When we think of the disadvantages of this type of renewable energy, often costing much more to think of anything in particular except that aesthetically, it is not particularly nice when you decide to install in the fields.
In addition, the level of radiation of this energy varies from one area to another, and so does between one season and another, which may not be as attractive to consumers.
When deciding to use solar energy for a large part of the population, it will need large tracts of land, making it difficult for this type of energy is chosen.
In addition, another drawback is that initially requires a strong financial investment to which many consumers are not willing to risk.
Many times it should complement this method of converting energy with others, such as hot water installations and heating, require a pump to circulate the fluid.
Places where there is more radiation, are deserted places and away, (energy not used to develop farming or industry , etc …)
SOLAR POWER TODAY
In some countries, like Germany, solar energy playing a major role; in the late 80s and early 90s it was launched several plans for the construction of solar power plants and solar roofs. In addition, the German government has encouraged the implementation of this type of energy subvencionas and aid.
In Rajasthan (India), they have built solar cookers, with the capacity to feed 1,000 people a day. The world’s largest solar cooker can serve 33,800 meals a day.
Cyprus is the country that more solar energy produced per head, and over 90% of its buildings contain solar thermal collectors.
Greece is able to supply one of every 4 inhabitants by solar power, and solar power plants account for over 20% of all Europeans.
In Israel, a law introduced 20 years ago, it requires that buildings are equipped with solar collectors, which means that 85% of households have solar energy.
China is the country with the largest area of solar collectors installed, in total 40% of all collectors in the world would be in China.
TYPES OF SOLAR ENERGY
There are different types of solar energy depending on the method of collection, processing power is performed and its applications. These are the main types of solar energy that can be distinguished:
Passive solar energy : The set of infrastructures aimed at obtaining energy directly from the sun, unprocessed. Not emit any gases that contribute to global warming and energy can be consumed at or accumulated to take advantage in the future.
Active solar energy : In this case, infrastructure convert solar energy into heat. In this case systems such as fans or pumps to store energy used. This type of solar energy can be used for heating or water heater, for example.
Solar thermal : This is the use of energy from sunlight to produce heat and energy for the small-scale consumer health, for heating or water heating system in homes.
Thermal energy : Solar thermal energy is based on liquid heating by the sun. These liquids are used in a thermodynamic cycle for producing electricity, generally a large scale.
PV : This type of solar energy and renewable energy produces heat through the use of photovoltaic cells. These devices are able to transform photons, that is, the light energy into electricity. They usually have a lifespan close to 25 years.
Wind Solar Energy: This is a kind of black painted fireplace in the air to be heated by the sun’s rays is stored. His big problem is that it is difficult to heat the air enough, so that this system is effective air chimneys should have a high altitude.
Then you leave a video explaining about solar energy to enjoy interactive manner on this type of renewable energy.
MORE POSSIBLE APPLICATIONS OF SOLAR ENERGY
Solar energy is likely to be exploited in many areas, including some industries and sectors that currently only look in the direction of fossil fuels.
One of the possible applications of solar energy and in fact, already being carried out in some cities it is as a source of lighting. In some areas they have been placed lamps that run through solar energy and are able to store energy during the day to provide light at night. It is a system that would lead to self-sufficiency of light and offer great savings in street lighting.
Most applications of solar energy in countries like Spain, or not given, or will give a large scale, since the tax rate and are only suitable for large companies able to invest heavily in search of big profits in the medium and long term. However, in many other areas of the world solar energy it is also being developed at local and family level, for private use. More and more households enjoy heating or hot water by installing home solar panels.
On the other hand, another of the possible applications of solar energy could be in the automotive industry, where it has not yet gone from the power train prototypes of futuristic image.
However, the idea of fully autonomous vehicles that need no fuel or electrically recharged and are also completely clean and respectful of the environment should be assessed. At least much more than has been done so far.
Another possible application and in fact already used is the use of space solar panels. These are solar panels that are installed on satellites and collecting solar energy in space, energy is then used for energy supply of the satellites themselves or transmitted to Earth for use in the planet.
Anyway, solar energy represents neither a 1% of the energy consumed on the planet. And such a powerful, clean and renewable energy can not continue wasting so.