Solar photovoltaic energy is energy produced by solar photovoltaic cells, which convert sunlight directly into electricity. It is virtually inexhaustible. It is the cleanest form of energy on earth and consists of caloric radiation, light, radio or other radiation from the sun. Huge quantities of this energy underlie almost all natural processes on Earth. However, it is quite difficult to capture and store it in a certain form that allows it to use it later.
Solar energy can be used for housing heater or thermal batteries can be stored in the form of heat. The heat generated can be used in photovoltaic primarily domestic hot water heating heat responsible for the ambient temperature of the house and pool heating. There is even an air conditioner based on solar heat, where it is the main energy required for cooling the air.
The solar cells were previously often used to power without batteries, computers and pocket watches. They are made of semiconducting materials similar to those used in electronic semiconductor chips constituting the semiconductor device.
In Europe, Romania is the second to sunlight and can define four distinct areas of power of sunlight, from a peak of 1,600 kWh / m2 in Dobrogea to 1250 kWh / m2 in the north annually.
In 2008, the Member States with the highest share of renewable energy in final consumption are Sweden (44.4%), Finland (30.5%), Latvia (29.9%), Austria (28.5 %) and Portugal (23.2%), opposite hovering Malta (0.2%), Luxembourg (2.1%), UK (2.2%), the Netherlands (3.2%) and Belgium (3.3%). Moreover, countries that have raised most significantly this percentage in 2006-2008 are Austria (from 24.8% to 28.5%), Estonia (from 16.1% to 19.1%) and Romania (the from 17.5% to 20.4%).
The situation in Romania: Renewable energy provided 20% of the national consumption of Romania in 2008, double the European average, according to Eurostat data. Thus, Romania ranks sixth among EU Member States where the share of energy from renewable sources in gross final consumption.
The advantages of using solar energy
• Solar energy is a renewable resource in the true sense of the word. Will not disappear unless the sun will cease to burn, in which case there will be no life on our planet.
• Solar panels do not produce no pollution during operation, as opposed to heating systems of nuclear reactors.While causing problems first nuclear waste recycling, ultimately detrimental produce smoke and ash.
• Power generation by solar panels or other means using solar energy is free from noise, unlike other methods.
• Installing solar panels is easy and efficient in terms of costs. Furthermore, they are useful in situations where local power networks do not work.
• space centers are those that use the most effective this type of energy.
• Unlike oil and coal reserves which are distributed ‘preferenţiar’, solar energy is available in all parts of the planet, not concentrated in one hand. Therefore, the “harvest” solar energy can be made from almost anywhere.
• solar power generating units are compact and flexible in design, which means it can be installed in almost any space, without worrying that you have to build special locations.
• Initially, the solar panels is expensive, but free energy generation, over the years, leading to a highly effective global cost. In addition, solar panels means less maintenance and monitoring.
The disadvantages of using solar energy component
• Initial costs are high. This makes the installation of a plaque Solar power to cost a lot.
• Solar cells only works during the day, and their effectiveness is reduced during the dreary days and cloudy. For this reason, the system must be developed and effectively, benefiting from an energy storage system.
• Pollution can cause adverse effects on the efficiency of solar panels. Efficiency can be reduced solar cells are unsuitable for certain areas.
• Although almost any location receives sunlight, not every location is feasible for solar panels. The indication is that their orientation to the south.
• Creation of large facilities for solar energy is costly and difficult in terms of finding location. Location is recommended for possible rather arid lands.
• Solar energy is a concentrated energy such as fossil fuels hence its use in automobiles or other mechanized forms is difficult, considering the energy result.
• Decision choice of such a system depends on the needs and possibilities of each person within the financial possibilities of the country, of where you are and especially money ordering. It is a useful investment, but also expensive and in any case is not a solution that works wonders.