Solar is the largest non-polluting renewable sources of energy, it is inexhaustible, is the future, the focus of human energy use. However, solar power renewable energy accounts for only 5?, Ranking four of the bottom of renewable energy. This is mainly due to the production of polysilicon solar cells modified Siemens law too much power, and are exploring the physical metallurgy technology is not yet mature. This requires the development of China's scientific and technological workers to speed up the pace, with a view to the development of solar cells and made breakthrough progress.
Solar energy transmission is the base problem Solar is the great non-polluting energy. Second exposure to the sun's energy on Earth is equivalent to 50 billion tons of coal, power consumption than the current capacity of all mankind 35,000 times larger. The sun's nuclear fusion can be maintained within a few, compared with the human in terms of the limited survival time, solar energy can be said to be inexhaustible. Received by the Earth's solar power for an average of 1367 watts per square meter, but resulted in different geographical areas east and west China received a large energy difference, the same area the same day at different moments do not receive the same energy.Solar power generation, the industry referred to as "photovoltaic." In simple terms, is based on the principle of photovoltaic effect volt, the use of solar cells to solar energy directly into electricity. More importantly, the solar photovoltaic system in the sunny and cloudy days can generate electricity. With the traditional methods of thermal power, solar PV has the advantage of being sulfur compounds to reduce carbon emissions, thus reducing the greenhouse effect. On the other hand. Solar energy resources as an "inexhaustible," the effectiveness of this is the traditional Stone can not match the advantages of energy. According to Shanghai's geographical and climatic conditions, this coastal city is very suitable for the construction of solar power and wind power, wind power generation in鋻but not stable enough and the need to build large-scale wind field of the specific conditions (in relative terms. To build solar power facilities housing at the top). Solar power generation may be the most suitable for the densely populated city of Shanghai, a city with limited land resources. From the economic benefits that the summer high temperature is the most intense SMEPC season. In this short span of a few months to build a new power plant is not cost-effective, can consider using solar power to fill the gap. Shanghai sunlight for solar power the average 2700 hours each year, July to November are the best time for solar power generation. Conditions from a technical point of view. PV abroad for more than 30 years of technology history. Has matured, some of which the state has solar power generation network architecture, the realization of a solar-powered civilian. Present. China's solar cell manufacturing process is very close to international advanced standard. National Development and Reform Commission Li Junfeng, deputy director of the Energy Research Institute and other experts (PV China Development Report 2007) that solar power technology in China is the plight of the domestic photovoltaic power companies do not have a strong independent research and development. Major semiconductor materials and equipment are imported. But China is not without good photovoltaic enterprises. Suntech, CLP Nanjing PV solar cell manufacturers, such as the production of the first generation of crystal solar cells, high quality and stability is the mainstream products on the market.
There was a field in my old town
Where we always played hand in hand
The wind was gently touching the grass
We were so young so fearless
Then I dreamt over and over of
you holding me tight under the stars
I made a promise to my dear Load
I will love you forever
Time has passed
So much has changed
But the field remains in my heart
Oh where are you?I need to tell you I still love you
So I reach out for you
Your voice still echoes in my heart
You are my true love
There was a fidle in my old town
Where in Spring all flowers blossomed wide
We were chasing butterflies
Hand in hand ’till close of day
Your voice stell echoes in my heart