Solar Energy and Photovoltaic Industry

Solar energy is not only the continuous internal solar fusion reaction process of energy generated. The average solar radiation intensity in the Earth's orbit is 13671 ^ 1/1 ^. Earth's equatorial perimeter of 400001 ^, which can be calculated, the Earth's energy 4 reached 1730001 ^. The standard peak intensity at sea level is the average annual radiation intensity of a point 2411 on the Earth's surface 0,201 ^^! . 2, the equivalent of 1020001 ^ energy, human dependence on these energies to survive. The sun is a huge, long, endless energy. Although the solar radiation to the earth's atmosphere is only the total energy of its radiation (about 3.75 of 22 billion, but up to 1730001 ^, that is, the sun per second to the earth's sting is equivalent to 500 million The energy, energy and energy of the ocean and the tidal energy of the ocean are derived from the sun. Even fossil fuels (such as coal, oil, natural gas, etc.) on the earth fundamentally Said, is also stored since ancient times, solar energy, so the broad range of solar energy included is very large, narrow sense of solar energy is limited to solar radiation energy of light and heat, photovoltaic and photochemical direct conversion.

Solar photovoltaic power generation is an important form of solar energy utilization is the use of solar cells to convert light energy into electricity power generation, and with the continuous progress of technology, photovoltaic power generation is likely to be one of the most promising power generation technology. The basic principle of solar cells for the photovoltaic effect of the semiconductor, that is, under the sunlight to produce light voltage phenomenon. In 1954 the United States Bell Labs first invented the basic structure of the practical value of crystalline silicon solar cells, solar cells from the first in space technology has been widely used, and now gradually began to be applied in the ground.

Fossil energy, nuclear energy, wind energy and biomass power generation technology compared to photovoltaic power generation has - series of unique advantages, can be summarized as follows:

There are no intermediate processes (such as thermal energy - mechanical energy, mechanical energy - electromagnetic energy conversion, etc.) and mechanical movement, and the power generation form is extremely simple. The principle of power generation is advanced: direct conversion from photon to electron. Therefore, from the theoretical analysis, can be very high power generation efficiency, up to 80% or more. Due to the limitations of materials and processes, single-cell single-crystal silicon cells have been close to 25% the most efficient; and more than 40% of the compound semiconductor cells in multiple junctions. From the principles of computing and technology development potential, through 10 to 20 years of efforts, solar cell conversion efficiency of 30% to 50% can be achieved.

Solar energy resources of the infinite and distribution characteristics: solar radiation inexhaustible, renewable and clean environmental protection; sun shines the earth, everywhere, without transport, the most important thing is that no country to implement monopoly and control may.

No shortage of resources and depletion of the problem: the use of the main reserves of silicon material rich in oxygen for the crust than the second element of the arrangement, as much as 26%.

Photovoltaic power generation and the relationship between nature: no combustion process, do not emit greenhouse gases and other waste gas, do not discharge waste water, environment-friendly, so that the real green power.

No mechanical rotating parts: no mechanical wear, no noise.

Construction and Disassembly Features: Modular construction Easy to install, disassemble, scale, and easily expand capacity at any time.

Use performance and life issues: After decades of proven practice: photovoltaic power generation performance is stable, reliable, long service life of more than 30 years

Maintenance and management issues: can be unattended, low maintenance costs.