Polaris solar PV net news: seeking the domestic PV market requires great wisdom and great strategy epic, grand strategy. Development of new energy needs to reform the old economic mechanism of energy, the establishment of new energy economy system in favour of new energy power. Energy economic mechanisms of change and innovation that involves trillions of energy structure adjustment, hinges on a number of energy interests, vital interests, involving socio-economic aspects. This change does not arise spontaneously, someone must consciously become the driving force for change. Photovoltaic industry has come to the situation the last minute. Photovoltaic companies has been reduced to the brink of bankruptcy, many tiny photovoltaic industry has also been a pessimist to persuade the bankrupt became a bankrupt, like PV loss has arisen now billions of sierbujiang of big firms are shocking. Instead of sitting idle, rather than living for change.
Energy-saving emission reduction targets for the implementation of China’s commitments to the world, strengthening policy support strategy for new energy economy, and relevant State ministries launched a solar roof program. It is understood that the solar roofs plan refers to installing solar power installations at the housing top, based solar photovoltaic technology in urban and rural areas to generate electricity, to achieve the emission reduction targets. Qualifying demonstration projects must be larger than 50kW solar roof policy, that is, installations that require at least 400 square metres area, the owners will focus on public and commercial buildings such as schools, hospitals and Government Treasury subsidies cost could be reduced to 0.58 Yuan per kWh.
Distributed power plant economic benefits
Compared with the widely built large photovoltaic power plant in the desert, rooftop solar building integrated photovoltaics and solar power plants will make it feel more directly into green energy from PV.
In the lateral façade of the buildings with roofs of resources to build small power plants, not only save a lot of power plant construction land, while avoiding long distance electric power transmission losses, reducing the power grid link, saving power input, is technically relatively easy to implement.
Power directly on the roof for the user side, because of its small capacity, no direct impact on the grid, in the case of public power, PV can be used as additional power immediately relieve the pressure of power. Small-scale grid-connected power station on the user side, conditions are ripe, convenience of the grid as long as meet the technical conditions for grid operation, fully parallel operation, this technique has a very sophisticated, power relatively easy to calculate, in conditions of power grid operation in our country can stability grid in the user side.
At present, the distributed model has become the trend of the development of new energy. One industry source said in an interview, European solar power also uses a “distributed development, local power” mode. Germany 2011 PV capacity up to 23 million-kilowatt, already exceed the scale of China’s installed capacity of hydropower station of the three gorges which are dispersed in BIPV/rooftop distributed users to access the system. Owners can create spontaneous use, excess electricity can be sold to the electricity market, lack of electricity supply from large scale systems. This development mode of advantages is: power local elimination na, basic not abandoned light, power get full using; without far distance transmission, so without supporting new large high-pressure, and super high-pressure lost variable electric facilities, save large investment and reduced large transmission loss; power dispersed, so access system voltage grade is low, like in “capillaries system” in run, appeared not stable of new energy power on main grid effects is micro.
According to estimates, a residential building, laying on the roof solar panel, realization of building integrated photovoltaics, spontaneous 40 degrees. If this House is to buy 100 kilowatt-hours of electricity from the grid, you can now buy 60 kilowatt-hours of electricity.
Just think, if the promotion of distributed generation in the country, means that the power supply will be reduced by 40%, equates to a saving of 28% coal-fired electricity, also can reduce the thermal power plants of 30%, this contribution to the world will be enormous. Construction of large photovoltaic power plant compared to the desert areas require high transmission costs, solar BIPV roofing power plant economic benefits cannot be ignored.
Why PV building integration
Because solar energy density is low and highly dispersed, in order to provide the required energy, there must be sufficient acceptance area. According to estimates: in order to meet the 2000 global electricity demand, to solar cell efficiency 10%, need of space for 840kmx840km=640000km2, which is equivalent to Germany and Italy two-State area.
Based on historical data, our 1995 annual generating capacity of about 100 million MW˙h, if all the solar cell power generation, its reception area is about 12500km2, bigger than Tianjin. The above values show that contributed considerably to the size you want, building integrated photovoltaic and efficient use of Building exterior surfaces equivalent was the main way to solve receiving area.
Photovoltaic building integration systems, such as photovoltaic power generation systems for curtain wall, costs and structure design of combination of photovoltaic cells and building materials production process depends to a large degree. Research showed that, if Institute, and building materials producer and PV manufacturer can full collaboration up, building materials PV integration of power unit of manufacturing cost and alone production PV component of cost similar, even than building materials plus PV component of cost also low, and inverse variable and wiring system is can overall into to buildings of power system in the to, so, BIPV of cost may than alone of PV power also to low have more.
BIPV technologies path is most ideal for–CIGS
Academic and industrial circles generally believed that the development of solar cells has entered the third generation. First on behalf of silicon solar, second on behalf of polysilicon, and non-crystal silicon, solar, Copper Indium Gallium se film Sun battery has production cost low, and pollution small, and not recession, and weak light performance good, significantly features, photoelectric conversion efficiency home various film Sun battery of first, close Yu crystal silicon Sun battery, and cost just it of one-third, was called next generation very has future of new film Sun battery, is in recent years research development of hot.
In addition, the battery has a soft, uniform black appearance, is the ideal choice of appearance have higher requirements for premises.
As energy prices soar like a rocket in recent years, coupled with amorphous silicon solar cell prices fell, crystalline silicon module business is growing very significantly, some observers have claimed that crystalline silicon solar power systems may eventually meet the United States in energy demand by as much as 20%.
Compared with conventional PV, CIGS for fewer materials are used in the manufacture of thin film solar cell and thus cheaper. CIGS manufacturing photoelectric materials is made of thin layers deposited on the substrate, and this greatly reduces the use of raw materials. The emergence of new production, including printing and further reduce costs.
Performance of thin-film technology in the near future significant increases in efficiency has become a trend. For example, the CIS/CIGS have been able to compete with the conventional crystalline silicon solar module efficiency. Copper-Indium-Gallium-selenium solar panel can also be made into flexible, the color of its uniform and stable performance, at a press conference, seems much more suited to building integrated applications.