Polaris solar PV net news: development of the ups and downs of the Chinese PV industry has experienced ups and downs, doubts also continued on the PV industry, such as “solar PV manufacturing energy consumption, pollution, and come with less power-hungry.” This statement from the origin of more than 10 years ago, widespread, in fact, no basis in fact, is incompatible with the status of PV industry in China. Now needs to be resolved and to change these negative understanding.
China clean development objectives of the Government are non-fossil energy accounted for the proportion of primary energy consumption by 2020 is 15%, to meet this goal, the proportion of wind power and solar energy will be doubled. Taking into account wind and solar-powered development of the difficulties, the Government “Thirteen-Five” will also support from policy for renewable energy development. National development and Reform Commission recently issued the administrative measures for guaranteeing the purchasing renewable power generation in full, clearly strengthening renewable energy affordable acquisition in full.
PV flexibility (plaster) and universal (Sunshine) making it one of the most promising renewable energy of the future, after Government and solar energy-related industry for more than 10 years of efforts, China PV power plants and distributed 37.12 million-kilowatt and 6.06 million-kilowatt respectively, become the largest country in the global PV installed capacity of PV manufacturing has gone beyond the initial stages of development, and entered the stage of mature development.
However, the development of the ups and downs of the Chinese PV industry has experienced ups and downs, doubts also continued on the PV industry, such as “solar PV manufacturing energy consumption, pollution, and come with less power-hungry.” This statement from the origin of more than 10 years ago, widespread, in fact, no basis in fact, is incompatible with the status of PV industry in China.
PV manufacturing industry mainly includes the purification of silicon, silicon ingots wafers, PV cells and PV modules in four aspects. Silicon purification extract solar grade silicon from Silicon Powder, silicon crystals are then cut, printing, etching cleaning electrodes made of photovoltaic cells, encapsulated by the solar cell made from the end of the PV modules. Among them, the crystalline silicon purification need to be done under high temperature conditions, requires large amounts of electricity, total energy consumption of the 56%-72%, is the most important chemical processes in industry chain. The so-called “high energy consumption and high pollution” should be aimed primarily at this link.
First solar energy problems. Silicon purification is truly large-scale, energy-intensive industries. However, this does not mean that photovoltaic products are energy-intensive, unit in the production of PV modules need to be spent in total energy converted into electricity, and compare with the component life-cycle electricity generation. With the rapid expansion of industrial development and technological progress, China solar energy consumption fell very quickly, while Government emphasizes the photovoltaic energy development. Since 2006, with the advancement of technology and environmental standards are improved and significant decline in the average comprehensive electricity consumption of China PV industry chain, 2015 issued by the Ministry of the PV manufacturing industry conditions, require polysilicon production process the power consumption to less than 120-kilowatt/kg; new and expansion projects have less than 100-kilowatt/kg, the energy consumption should be close to the world advanced level.
In this conversion, photovoltaic electricity consumption in 2015, in line with national requirements, produce a Watt PV module take 0.6-1.2 degrees, coupled with Silicon material aspects of energy consumption, according to Central and Eastern China power generation hours 1200-1400, Watt PV module annual power consumption by the power more than a year to recover the production; light in resource-rich areas in the West if you do not receive a large abandoned light recovery period may be shorter. Therefore, according to PV module 25 life gauge, photovoltaic power generation in any case than the production of electricity.
On one hand, photovoltaic production process the power consumption of about only about 5% of photovoltaic electricity. The other hand, thinks photovoltaic energy is mainly know enough about PV production processes and energy consumption. In fact, no one compared the three gorges power station consume 4 million tons of cement, its 32 units of how long energy consumption through power recovery.
Followed by the PV manufacturing pollution problems. Modified Siemens process by-products of Silicon tetrachloride (highly polluting toxic waste) and exhaust gas such as hydrogen, chlorine. Silicon tetrachloride if direct emissions, moist air that is produced from the decomposition of hydrogen chloride, which is called “solar high pollution” basis. However, China PV industry clean production all specifications, in 2010, the Ministry and the national development and Reform Commission, Ministry of environmental protection issued the polysilicon industry terms, provided in restoring gas Silicon tetrachloride, hydrogen chloride, hydrogen recycling rate of not less than 98.5%, 99%, 99% and amorphous silicon production sites, energy consumption, environmental protection, the scale has made clear provisions and restrictions. China silicon manufacturers realize the modified Siemens closed loop production, achieve “controllable”, from synthesis to distillation, separated from the restored to exhaust, achieving recycling. PV high pollution said there is no basis in fact.
In 2015 the PV manufacturing industry conditions further improve photovoltaic production processes cleaner production standards. Specification of PV manufacturing enterprises with advanced technology, energy saving and environmental protection, product quality and production cost of production technologies and equipment. Photovoltaic manufacturing companies need to strictly implement the environmental impact assessment system, not through the approval of the environmental impact assessment shall not commence the construction of the project. In addition, norms for waste gas, waste water, odor, industrial solid wastes and noise emissions, the disposal or utilization, with special emphasis on Silicon tetrachloride and other hazardous wastes should be entrusted with handling capacity of properly qualified units use or disposal.
So, if Chinese PV companies to comply with State regulations for production, there should be no pollution. Chinese PV companies from exporting Western countries started to develop, the universal adoption of international product export certification, such as the United States UL, or Germany TUV certification. These include content of clean production certification, said major PV manufacturing companies in China in terms of energy saving and environmental protection, also called high standards and strict requirements.
In summary, beginning of China PV industry development there may be a higher energy consumption and pollution, but after the development of these issues should have been solved. Therefore, the need to resolve and change so-called “solar high energy consumption and high pollution,” understanding of the negative. Of course, as an outstanding representative of the clean energy of the photovoltaic industry, takes discipline, as much as possible in all production processes to further energy-saving and emission reduction.
Original title: PV should be “high energy consumption and high pollution,” name