The sun has huge, long, endless energy. Although the power of Earth's atmosphere absorb from solar radiation is only the total energy radiation (about 3.75 × 1026W)of the 22 billionth, but has been as high as 173000TW. that is to say every second exposure of the sun's energy on Earth is equivalent to 5,000,000 tons of coal.

    In the World energy crisis, solar energy is undoubtedly the most eye-catching in the field of solar energy.solar photovoltaic cells, solar water heaters and other products widely popular.solar lighting products, solar energy construction and solar energy air-conditioning technology have also been greater development.

    In summer, whole air-conditioning power consumption is almost one-third of the electricity power system, which is one of the reasons leading to overburdened power system in the summer. Therefore, solar energy air-conditioning from the very beginning is very attractive. The use of solar cooling and refrigeration power in general principle is the same as the energy used by different cause some structural changes. At present, solar cooling has a number of means, such as:

     Compression refrigeration

     Steam-jet cooling

     Absorption refrigeration

     The general use of solar thermal projects, such as heating, hot water, and so on.In fact, the demand for solar energy and the solar power supply have some confilict. The more cold weather, people need more warmth, the amount of solar energy to provide is often less.From this perspective, the application of solar energy air-conditioning is the most reasonable: the stronger solar radiation,the more hot weather, we need air-conditioning load is also greater. This is the application of solar energy air-conditioning the most favorable objective factors.

     In diversity of solar energy air-conditioning technologies, mainly are absorption refrigeration and optical-electrical energy conversion into  drive refrigeration. More mature technology is lithium bromide - water absorption refrigeration, has been in a number of demonstration projects in some applications, the results are satisfactory. As the technology of solar energy air-conditioning and a large variety of maturity are different and therefore the slow process of industrialization. It can not be denied, however, with the energy policy of the tilt of clean energy, solar energy air-conditioning to promote the popularity of unlimited prospects for a better! Investment in solar energy air-conditioning, pre-occupation of the market will be the expansion of the strategic decision-making industries.

     High-purity polysilicon

     which is the basis of raw materials for the electronics industry and photovoltaic industry.In the next 50 years, there can be no other  materials take place silicon materials become the main raw material for electronic-photovoltaic industry.

     Global demand for polysilicon to the rapid growth in market demand. World production of polysilicon in 2005 to 28,750 tons, 20,250 tons for the semiconductor level, the level of solar energy to 8500 tons. Semiconductor demand level of about 19,000 tons, a slight surplus; demand for solar-grade 15,600 tons, and in short supply. In recent years, the world's solar cell production to increase rapidly, driven directly by the rapid growth in demand for polysilicon. By the global over-supply of polysilicon to demand. Integrated circuits and solar cells on the fast-growing demand for polysilicon, electronic level of about 1,000 tons of polycrystalline silicon, polycrystalline silicon solar cells need about 1,400 tons; 2010, Chinese demand for electronic-grade polysilicon in 2000 will reach about Tons of polycrystalline silicon photovoltaic-level annual demand will reach about 4,200 tons. China's own supply of polysilicon is a serious gap, 95% of polysilicon materials need importing, others long-term supply, along with soaring prices, are putting the lower reaches of polysilicon to the large number of enterprises have become constrained China's information industry and  as a bottleneck photovoltaic industry development.

     As the demand for polysilicon continues to increase, the gap in the market increased and prices stimulated by the continuous rise in the domestic emerged to catch a wave of polysilicon project. Polysilicon investment wave, it can be said that the rapid development of solar cell market, the inevitable result of, but the silicon industry China must be careful development can not be rushing into mass action; the key is to master the core technology, otherwise it will be difficult to be controlled by others out of the situation .

     As a high-tech industries, the use of poly silicon mine development, the energy industry, high electricity demand. At present,the most electricity silicon mine enterprises need to break through the bottleneck. Therefore, great efforts to develop China polysilicon industry, the conditions are ripe in urgent need of local preferential policies for the development of electricity prices and lower costs.

     The source of supply of polysilicon materials in 2007 will be the most serious lack.By 2009, the world's annual demand for polysilicon will reach 65,000 tons. In the next 3-5 years, that is, China's "11th Five-Year Plan" period, will be the China's golden age for silicon industry  rapid development.

     The world's 20 million people are not the normal supply of energy. Abundant solar radiation is an important source of energy.It is inexhaustible, pollution-free, low-cost, free use of human energy. Solar energy per second to reach the ground up to 800,000 kilowatts, if the 0.1 percent of solar energy on earth's surface convert into electrical energy,as the change rate of 5%,annual electricity capacity  will up to 5.6 × 1012 kWh,which equivalent to the world's energy consumption 40 Times.

     The world's largest photovoltaic plant with an annual output of almost 40MW, for the price of 3-4 dollars / WP.

     China's rich solar energy resources, the theoretical reserves of 1,700,000,000,000 tons of standard coal each year. Resources development and utilization of solar energy potential is vast. China is located in the northern hemisphere, from the north-south and east-west distance of 5,000 km above all. China's vast land is rich in solar energy resources. In most parts of the average radiation levels in more than 4 kwh per square meter, Tibet radiation of up to 7 kwh per square meter. In the hours of sunshine than 2,000 hours. The same latitude with the other countries, similar to the United States, much more superior than Europe, Japan.Therefore there is great potential for development. Over the past 20 years, China's photovoltaic industry in the long-term sustainability of the global market share of about 1%. In 2003, China's solar cell component production has increased in 2003, up to 12,000 kilowatts, accounting for 2.2 percent of the world share in 2004 amounted to 35,000 kilowatts, accounting for about 3%. The solar energy industry is emerging rising industry, operating risks, risks of competition, investment income to the objective control. The world is in the process of commercialization of solar energy development and use as an important trend. The European Union, Japan and the United States in 2030 after the energy supply security, focusing on renewable sources such as solar energy. It is estimated that by 2030 the world solar power will account for 10% in 2050 to reach 20%. Large-scale development and utilization of solar energy so that the entire energy supply will have a place.

"Renewable Energy Law" promulgated and implemented for the development of photovoltaic power generation offers safeguards policy; the signing of the Kyoto Protocol, environmental policy and the introduction of the international commitment to the photovoltaic power generation opportunities; the western part of the great Development of photovoltaic power generation to provide a huge domestic market; crude oil prices, China's energy strategy, the Government made to increase renewable energy development to support the efforts of all of these are China's photovoltaic industry development Great.