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Solar energy applications

Hits:47 comment:0 Date:2016/11/18 13:37:55 tags:全部

The use of solar energy is not very popular at present, the use of solar power generation is still a high cost, low conversion efficiency, but solar cells in the field of energy for satellite applications.

Human beings rely on these energy to survive, including all other forms of renewable energy sources (geothermal resources except), although the solar resource amount equivalent to the use of human energy and more than ten thousand times, but the solar energy density is low, and it varies from place to place, from time to time change, this is the main problem facing the development and utilization of solar energy. These characteristics of solar energy will make its role in the whole energy system is limited.

Solar energy is not only a primary energy, but also renewable energy. It is rich in resources, can be used free of charge, and no transport, no pollution to the environment. Create a new form of life for mankind, so that society and human beings into an era of energy conservation and pollution reduction.

The idea of building a space solar power station was first proposed in 1968, but it was not until recently that people began to really put it into action. Japan is one of the pioneers of the project, the project is expected to cost $21 billion, generating capacity of one billion watts, for the use of 294 thousand families. Solar power stations built in space, no matter what the weather, can use solar power, which is different from the establishment of solar power stations on the earth.

Photothermal utilization

Its basic principle is to collect the solar radiation energy, and convert it into heat energy. At present, the most widely used solar collector, there are 4 types of flat plate collector, vacuum tube collector, ceramic solar collector and focus collector (trough, dish and tower). Usually according to the temperature and the use of the different, and the use of solar thermal light is divided into low temperature (<200 DEG C), the use of medium temperature (200 ~ 800 C) and high temperature utilization (>800 C). At low temperature using mainly solar water heater, solar dryer, solar distiller, solar heating (solar room), solar greenhouse, solar air conditioning system, the temperature is mainly using solar cookers, solar thermal power generation heat collecting device, mainly using high temperature high temperature solar furnace etc..

Power utilization

Clear new energy in the future large-scale use of solar energy is used to generate electricity. There are many ways of using solar energy to generate electricity. Has been used mainly in the following two.

1, the light - heat - electricity conversion. Heat generation by solar radiation. The utility model is characterized in that the heat energy absorbed by the solar collector is converted into the working substance steam, and then the steam driven turbine drives the generator to generate electricity. The first process is the conversion of light and heat, and the latter is the conversion of heat and electricity.

2, optical electrical conversion. Its basic principle is to use the photovoltaic effect to convert solar radiation directly into electrical energy.

Solar cell

Material requirements

Ultraviolet radiation, light transmittance is not decreased. Tempered glass components can withstand the diameter of 25 mm of ice hockey at a speed of 23 m / sec.

The performance requirements of the cured EVA film

The transmittance is more than 90%; the crosslinking degree is greater than 65-85%; peel strength (N/cm), glass / film is greater than 30; TPT/ film is more than 15; the temperature resistance, low temperature, high temperature of 85 DEG C to 40 DEG C; the back of the solar cell, aging resistance, corrosion resistance, resistance to ultraviolet radiation, airtight etc..

purpose

Solar power is widely used in solar lights, solar lamp, solar portable system, solar mobile power, solar products, communication power supply, solar lamps, solar buildings etc..

Solar energy may be the main source of electricity by 2050, the cost of generating electricity equipment fell. IEA report said that in 2050 before the solar photovoltaic (PV) system will contribute up to 16% of the world's electricity, solar power generation from solar power (STE) will provide a power of 11%.

Photochemical utilization

This is a kind of light chemical conversion method which uses solar energy to decompose water directly. It includes photosynthesis, photo chemical, photochemical and photo decomposition.

Photochemical conversion is the process of converting chemical energy into chemical energy by absorption of light. The basic form of photosynthesis of plants and the use of chemical changes in the storage of solar energy photochemical reaction.

Plants rely on chlorophyll to convert light energy into chemical energy, to achieve their own growth and reproduction, if we can reveal the mystery of photochemical conversion, artificial chlorophyll can be achieved. Solar photochemical conversion is actively exploring and studying.

The process of converting solar energy into biomass by the cooperation of plants. Giant kelp.

Fuel utilization

The EU from June 2011, the use of solar light to provide high temperature energy, water and carbon dioxide as raw materials, committed to the development of solar fuel production. Until now, the R & D team has been the first in the world to successfully realize the whole process of renewable fuel laboratory scale production, its products fully comply with EU aircraft and automobile fuel standard, does not need to make any adjustments in aircraft and automotive engine changes.

Design of "solar" fuel prototype, which consists of two parts: the first part of high technology energy generated by centralized solar light, auxiliary ETH Z rich independent intellectual property rightsmetal oxide additives assisted ETH Z rich independent intellectual property rights, high-temperature reactor water and carbon dioxide into synthesis gas in the design and development of their own sun (Syngas), the main component of synthesis gas into hydrogen and carbon monoxide; the second part according to the principle of Fischer Tropsch (Fischer-Tropsch Principe), the high temperature synthesis gas waste heat can be converted into the commercial application in the market of the "solar" fuel products.

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