The 'life' of solar energy is introduced1

According to records, the human use of solar energy has a history of more than 3000 years. And tries to use solar energy as a kind of energy and power, only 300 years of history. Real solar as & other; Recent much-needed supplement energy & throughout; ，“ The foundation of the future energy structure & throughout; , it is in recent years.

since the 1970 s, solar energy science and technology by leaps and bounds, the changes of solar energy utilization. In the modern history of solar energy utilization can be from 1615 France engineer Solomon & middot; DE & middot; Cox, invented the first solar powered engine in the world. The invention is a use of solar energy heating air make the expanding power and pumping machine. Between 1615 ~ 1900, and developed into many sets of solar power plant in the world and some other solar devices. Almost all these power plant adopts the concentrated method to collect sunlight, engine power, working medium is water vapor, expensive, the practical value is not big, most of the individual research manufacture for solar fans. The 100 years of the 20th century, solar technology development history can be divided into seven stages.

the first stage: ( 1900 - 1920) At this stage, the emphasis for the study of solar energy in the world is still a solar power plant, the practical aim is clear, but the cost is very high.

: (in the second stage 1920 - 1945) In this more than 20 years, solar energy research at a low ebb and solar energy can not solve the urgent need for energy, thus make solar research gradually out of favor.

the third stage: ( 1945 - 1965) In 20 years after the end of the second world war, some far-sighted people have noticed that the oil and gas resources is rapidly reduced, urging people to attach importance to this problem, thus gradually promote the recovery and development of solar energy research, academic organization and establishment of solar energy, academic exchange and exhibition, held again rise solar research boom.

the fourth stage: ( 1965 - 1973) In this stage, the research work of solar energy stagnation, the main reason is that solar energy utilization technology in the growth stage, it is not yet mature, and the investment is large, the effect is not ideal, it is difficult to compete with conventional energy, and therefore can not get the public, business and government attention and support.

the fifth stage: ( 1973 - 1980) In October 1973, the oil crisis objectively make people recognize that the existing energy structure must be completely change, should accelerate the transition to a future energy structure. So many countries, especially developed countries, to strengthen the for solar and other renewable energy technology development support, rise again in the world the development and utilization of solar energy boom. And a group of big achievements, such as vacuum tube-a, amorphous silicon solar cells and water splitting to hydrogen, solar thermal power generation, etc. Solar water heaters, solar cells, and other products began to achieve commercial, preliminary build solar energy industry, but on a smaller scale, economic benefit is not ideal

the sixth stage: ( 1980 - 1992) Boom in the 70 s, the rise of the development and utilization of solar energy, shortly after entering the 80 s began to ebb, gradually into the trough. In this stage, although the solar energy development research funding cuts, but the work did not interrupt, some project progress is bigger also, and encourage people to seriously look at previous plans and goals, adjust the research focus, strive for greater results with less investment.

the seventh stage: ( 1992 - present) Due to a large amount of fossil fuel combustion, the global environmental pollution and ecological destruction, pose a threat to human survival and development. World conference on environment and development, the Chinese government attaches great importance to for the environment and development, 10 countermeasures and measures, clear & other; Adjust measures to local conditions to development and promotion of solar energy, wind energy, geothermal energy, tidal energy, biomass and other clean energy & throughout; , formulated the 'China's agenda 21, further defined the solar key development projects. After 1992, the world solar energy utilization and to enter into a development period, its features are: solar energy utilization and the sustainable development and environmental protection together, the global common action, efforts for the realization of the world solar energy development strategy; Solar energy development goal is clear, focused, today, solar energy has been widely used. Solar flashlight, solar oven, solar photovoltaic, solar street light, solar advertising light boxes, etc. The arrival of the 21st century the renewable energy law of the People's Republic of China, China enters a market in the world's first; Scientists in the United States the protein in spinach extract chlorophyll, make the chlorophyll solar cells; Germany which consists of 33500 solar battery solar power plants. Solar energy of human being has entered a conscious, active new stage of development and utilization. 【 The above content released by solar street lamps factory finishing for you 】