Solar energy as a huge amount of renewable energy, the daily arrival of the Earth’s surface radiation energy equivalent to hundreds of millions of
Barrel of oil burning energy. Develop and utilize rich, vast solar energy that can produce or produce little to the environment
Pollution, solar energy is both the urgent need for future energy supplement, but also the basis of future energy structure. Whether it is from the economy
Will take the road of sustainable development and the protection of human survival of the Earth’s ecological environment to examine the height, or from the special
Use to solve the problem of real energy supply, development and utilization of solar energy are of great strategic significance.
Solar energy is one of the main alternative energy sources for fossil fuels
In the world’s energy structure in the twentieth century, the primary energy used by humans was mainly oil, natural gas and coal
Such as fossil energy. These fossil fuels are essentially tens of thousands of years ago or even longer for solar radiation to Earth
On the part of the energy stored in the paleontology (ancient plants and ancient animals), the changes in the sea and the evolution of today’s energy on Earth’s mineral deposits. They are the special form of paleontological fossils. After thousands of years, especially the consumption of nearly a hundred years, these fossil fuels have been consumed a considerable proportion. With the development of the economy, the increase of population and the improvement of social life, the future world energy consumption will continue to grow, the world’s total consumption of fossil energy will one day reach the limit.
With the gradual depletion of fossil fuels, the energy crisis has been seen in front of mankind.
In the world of energy savings data survey shows that: oil can be regarded as 39.9 years, natural gas can be taken for 61 years, coal
Recoverable for 227 years. It is clear that the recoverable amount of fossil energy is already numbered.
Human beings in the development and utilization of energy in the history of the river, with oil, natural gas and coal and other fossil energy-based
Period, only a very long stage, they will eventually go to the depletion of the new energy replaced. Humans must be early
Seek new alternative energy. Research and practice show that the direct radiation of the sun to the earth is rich in energy and is widely distributed
To reproduce, do not pollute the environment, the international community is recognized as the ideal special energy. According to international authorities, by 2050, 2050, the proportion of global direct use of solar energy will be developed into the world’s energy structure
Of the 13% to 15%, while the entire renewable energy in the energy structure of the proportion will be greater than 50%, solar energy will be a large number of applications of fossil energy one of the main alternative energy.
From an environmental point of view, the development and utilization of fossil fuels is one of the main causes of atmospheric and other types of environmental pollution and ecological damage. How to develop and use energy at the same time, to protect the survival of the human environment and ecological environment has become a global important issue. Since the middle of the twentieth century, countries around the world have taken measures to improve energy efficiency and improve the energy structure to address this major environmental issues closely related to energy consumption, known as clean energy.
Global climate change is a major global environmental concern, and since the era of industrialization, human material civilization has been highly developed, at the same time, the earth’s ecological environment has been severely damaged and deteriorated. In the past 100 years, the global average temperature rose 0.3-0.6 ℃, the global sea level increased by an average of 10-25cm, which is the so-called “greenhouse effect”. According to research reports, about 80% of greenhouse gases are caused by human activities, of which about 60% of the role of CO2. Visible CO2 is the main greenhouse gas type in the atmosphere, and fossil fuel combustion is the main source of C02 emissions. In 1990, the world’s primary energy consumption accounted for 27.3%, 38.6% and 21.7% of coal, oil and natural gas respectively. These fossil fuels emitted a large amount of C02 into the atmosphere. It is expected that the global average temperature will rise by 0. 2 ° C every 10 years from the beginning of the 21st century if greenhouse gas emissions are not taken, and the global average temperature will rise by 13. 5 ° C by 2100.
Solar energy can be used directly, basically no pollutant emissions, clean and clean. At present, various types of power generation carbon emissions rate of 275, oil power generation 204, natural gas power generation 181, solar thermal power generation 92, solar photovoltaic power generation 55, wave power generation 41, ocean temperature power generation 36, power generation 35, wind power is 20, geothermal power generation 11, nuclear power generation 8, hydropower 6. These data are based on the raw materials used in various power generation and combustion of mining and transportation, the manufacture of power generation equipment, the construction of power grids, the operation of power supply and the maintenance and waste discharge and disposal of all the energy consumed in the cycle. A variety of power generation methods in the life of the power generation calculated. The carbon emission rates of the various power generation methods are shown in the figure.
Solar energy emissions are much lower than coal oil and natural gas.