Polaris solar PV net news: building experience overseas double reverse shocks provides a unique PV companies to revive the best testing ground. Our BIPV photovoltaic applications is raised and a fierce competition in the market.
Architectural brought solar opportunity
Dongao island in Zhuhai, located in Central wàn shān Qū Islands, is a tourism development value of 140 Islands in Zhuhai Islands. Each year the number of tourists to the island grew by about 30%, in season, visitors per day for up to 2000 people on the island. The bottleneck of electricity supply has always been a problem for the island’s economic development. Because the island is (extension) 5 tourist resort and clubhouse, surge in demand for electricity.
Wàn shān Qū and Zhuhai City Government has always stressed that looking for an island based on renewable energy programme is to resolve the deep development of the island, the key to sustainable development, ecological Islands. Therefore, the city decided to cut in from the solar photovoltaic applications, improve diesel power has been used in the past of the island high costs, unstable voltage, only have 2 ~ 3 hours per day.
China singyes solar technologies Holdings Limited is a building integrated photovoltaics, a well-known domestic enterprises. Under the natural conditions of the island and the land resources of the enterprise, planning and construction of dongao Island Cultural Center, visitors center, terminal building to three large roof PV power generation systems using open space to build a ground station on the island. The project will complete year after next generation 11.2814 million, dongao island is diesel power to 1 million-more than 10 times. Company chairman Liu Hongwei said dongao Island solar mode successfully run, opening up a new island and lack of electricity power supply mode, for renewable energy industrialized development and commercial advertising has a unique model.
Dongao Island solar energy photovoltaic application think about the Earth, thought architecture, is a highlight of architectural importance affecting human life. At present building energy saving in our country from building insulation complete transfer to green building, a new period of development. Collection building, HVAC, renewable energy and green building, environmental protection and other technologies have become important areas of energy conservation and emission reduction. Double, PV enterprises overseas market fetches and settled in architecture is a viable option. According to statistics, 27.5% per cent of total building energy consumption of China’s energy consumption; at more than 40 billion square meters of existing buildings, 99% belongs to high energy-consuming buildings. By 2020 China will add more than 20 billion square meters of building energy consumption will reach approximately 35% per cent of total energy consumption of the whole society, beyond the first areas can become energy for industrial use. How to reduce this part of the building energy consumption, one way is to apply PV in buildings, access will convert solar energy directly into electricity of high energy-saving contribution rate.
Large enterprises are always ahead. In this year’s “two sessions” on, hanergy holding group of CPPCC member Li Hejun, Chairman of the country to support the development of BIPV in all of the proposals concerned. Li Hejun thought to develop photovoltaic building integration for improving the level of architectural energy saving in China, is significant to achieve the goal of a new town. He said that the existing floor space exceeding 50 billion square meters, this projection, wall 18 billion square meters of existing buildings in China. As with the existing exterior wall area of 1%, 30% installation of new exterior wall area of architectural PV calculation, you can install 1.26 billion square meters, with a total installed capacity of 81.9GW, potential market scale will reach 1.6 trillion yuan. In his view, is ripe for BIPV products in China, market demand has started to expand.
More PV enterprises will focus on architecture, here, all-round expansion of business becoming one of the biggest architectural photovoltaic applications. “European building integrated photovoltaics over 80% in the use of solar power, in the United States that has reached 67%. “A lot of companies said, with the push of distributed PV, architectural PV is considered to be the largest photovoltaic power generation in the future direction of the market and the most important. Accounted for 90% building PV PV end markets in the coming decades will form a trillion-yuan industrial scale.
Photovoltaic product can be used in buildings?
PV commercialization and technological breakthroughs in the field of architecture, can make our buildings from the traditional big energy hogs into energy production, makes renewable energy production and the development of green energy building closely conform to the trend, to seize the heights, Chinese enterprises to accelerate the photovoltaic building integration such as market expansion strategy. But use PV product or technology on the building and on the ground the same?
Has expert said, from early of photoelectric building demonstration project to “gold Sun engineering”, again to now of distributed power, PV power project are is by PV manufacturing company as PV component manufacturer, and BOS balance system manufacturer, and EPC company, Executive construction, these enterprise concern of direction more is station of electricity, compared less concern PV and building of combines, and PV system on buildings of effects, so caused security and fire hidden, and damage building insulation and waterproof system, quality problem endlessly.
A case study of rooftop PV, experts say, in our existing and under construction buildings industrial buildings accounts for 15%, public buildings, residential construction 15% 70%. Rooftop photovoltaic properties according to their roofs, rooftop PV applications into business, Government, and schools and other public buildings roof photovoltaic applications, three main types of residential rooftop PV applications. According to has built of project case view, situation severe and highlight of technology obstacles is, PV technology or products and buildings roofing of structure Dutch contains, and seismic standard, and system weight, and wind load, and snow load, and anti-wind load, and fire, and anti-lightning, and roof facilities space layout, shadow block and the PV bracket contact on buildings roofing insulation waterproof layer of protection, many building technology requirements of adaptability problem. In particular, the domestic most of existing buildings in the architectural and structural design of the year did not take into account the installation of photovoltaic power generation facilities, restricts the photovoltaic system on the existing building large-scale applications. Some local standard is expressly prohibited “damaged houses bearing structure and damaged building face.”
According to the PV array and architecture combine in different ways, architectural photovoltaic applications fall into two main categories: one is the PV array construction combination. PV modules are packaged in this way flat or curved panel bracket and tile installed on the roof of the building, photovoltaic power generation system as an added component attached to buildings, buildings as the photovoltaic array carrier, plays a supporting role. Another kind is the photovoltaic array and architectural integration. This way is the PV modules to a building materials (roofing shingles, roofing insulation, waterproofing, integration of external wall thermal insulation of exterior wall tiles, decorative plates, etc) or building components (awning, awning, balcony guards, Sun room, decorative elements, and so on) appears, PV artifacts become an integral part of the building.
It is understood that in either of these ways, photovoltaic integration with architecture is an advanced form of BIPV. It required must not only have the function of photovoltaic photovoltaic modules, also take into account the building wind, rain, thermal insulation, waterproof and fire-proof, decorative, protective function and integrated with buildings combined,. But at present our existing photovoltaic photovoltaic building project, mostly by way of simple supporting structures, or on top of photovoltaic module attached to the roof, do not belong to national standards required by the specification the preferred materials of photovoltaic components and building elements.
“Distributed mainly in building photovoltaic systems photovoltaic systems, PV power station with the ground are two different technical areas. Traditional crystalline silicon PV modules are mainly used for ground station, simple technology and manufacturing workers, has become a mature industry. PV artifacts is the technology of photovoltaic modules and integrated building materials products, so it has characteristics both of the PV modules and material characteristics must be met including the building safety and energy-saving technical standard. In Europe, the United States, Japan and other developed countries, building integration of photovoltaics has become a separate category of high-tech industry, involved in the areas of electro-optical design technology, photovoltaic materials collection of high-end equipment manufacturing, BIPV, PV artifacts, such as construction. Architectural PV integration started late in China, forward-looking systems research, technology base is quite weak. PV artifacts in particular research and development it is difficult to keep up with the growing market demand. “The experts said.
How to install PV on building products
Photovoltaic building applications in the field of housing and are collectively referred to as PV building. Current housing Ministry has issued a number of PV building standards, involving design, construction, inspection, maintenance, network, with a view to building specification in terms of architectural photovoltaic applications involving optical architecture design specifications, technical standards will also further improve the refining, for guiding the construction of BIPV.
In 2009, according to the Ministry of housing and on accelerating the solar rooftop views on the spirit of the, to implement the BIPV application scale, specialized in the field of urban and rural construction, BIPV application Committee of China construction metal structure Association was established in that year, responsible for BIPV applications management.
BIPV applications industry status, head of Commission for BIPV applications related photovoltaic products in construction or technical guidance opinions are presented.
PV modules for building envelopes, should meet the requirements of the indoor environment. First, lighting requirements. On the premise of indoor lighting requirements, consider using transparent photovoltaic curtain wall, solar roof, solar window transmittance is inversely proportional to generation photovoltaic modules, according to indoor daylighting, light transmittance calculation of PV modules and power, and economic analysis. Second, the ventilation requirements. In the premise of meeting the effective area of ventilation openings, consider adopting, photovoltaic PV curtain wall Windows, and should conduct economic analysis; PV modules should not be set to turn on the fan. Third, the insulation requirements. Transparent PV curtain wall, solar roof, solar PV module used by Windows, and should comply with the limit value of heat transfer coefficient of the climate zone where such PV module heat sink measures should be taken (solar cell temperature should not exceed 85 degrees c); promote the use of non-transparent glass walls, PV modules laminated glass can be used. Four is the insulation requirements. In summer hot and winter warm area, used for photovoltaic roofs, photovoltaic curtain of PV modules, should comply with the thermal inertia index; PV roof in hot summer and warm winter area, heat insulation measures should be taken in summer hot and winter warm area should encourage the use of solar shading. Five is the noise requirements. Used PV modules, PV photovoltaic curtain wall window shall comply with the performance requirements for airborne sound; this type of PV module heat sink measures should be taken (solar cell temperature should not exceed 85 degrees Celsius).
PV modules for building construction, should meet the requirements of building construction. Is a building roof. Additional installation of PV modules in existing buildings roof, to protect the original roof waterproofing layer of issues fully into account; according to the building fire rating, roof PV module shall comply with the flammability requirements; roof PV modules glass shall be made of safety glass. Second, building walls. Photovoltaic curtain wall shall be consistent with the physical performance requirements for building curtain walls; such PV module shall be by physical performance testing for building curtain walls. Third, Sun control. Residential photovoltaic system for solar shading; PV module size should be determined according to the building exterior shading coefficient calculation. Four building balcony. Solar PV balcony fence-slab component selection, strength such as photovoltaic components, safety glass, electrical safety, flammability, thermal insulation properties.
Photovoltaic systems installed in the building, should comply with the safety requirements. First, load. Widespread installation of PV modules in the existing buildings, structural load security review should be carried out; photovoltaic roof, photovoltaic, PV curtain wall visor should conform to the resistance to wind load class required; supporting structures, nodes are connected load calculations should be carried out. Second is the fire. Backplane photovoltaic modules, photovoltaic wire and cable flammability testing should be adopted. Third, the lightning. Building lightning protection measures for PV systems, for example with the building lightning protection network connections, the wiring inside the lightning surge protector installed, distribution cabinets and network interface equipment lightning protection equipment, equipotential bonding. Four is electrical. PV module through the insulation resistance, leakage current detection; where easy to connect with people, you should consider setting the DC voltage.
BIPV business opportunities
“According to green building of design concept, PV power system should and building energy, and other can renewable energy (light hot, and small wind, and geothermal energy, and bio can,), and household appliances (air conditioning, and pass for wind, and indoor air purification), and heating system (to warm, and air hot pump) and smart building, for system integration, through more can complementary to achieved various energy system of reasonable using, and integrated optimization and energy efficiency maximize, established based on solar utilization of more can complementary dynamic coupled energy system, Eventually solar power and other renewable energy technology breakthroughs and achieve large-scale application. “Experts say that optical construction from individual technologies to provide integrated development and technology integration solutions, has become a green building and development direction of zero-energy buildings.
As charged of the power architecture, BIPV is much more complicated than ordinary buildings. “Facing technical problems, not a one-way technology breakthroughs will be able to solve, but rather in a series of comprehensive development and utilization of new technologies and in coordinated management between different industrial sectors have made institutional cooperation based on the effectiveness of, and to complete a complex project. “The experts said, as a multidisciplinary integrated interdisciplinary, electro-optical architecture needs to be tightly integrated in traditional architecture and opto-electronic engineering, multidisciplinary, interdisciplinary and collaborative research, and cooperation in research. Compared with the ground station, PV building’s most striking feature is the form of diversification, diversification of BIPV, determines its market segmentation; of the BIPV market segmentation, determines the differentiation of PV artifacts products; PV product differentiation, determines the possibilities of original technological innovation. With increasing BIPV applications at home and abroad and its application scope in the future, especially all types of civil and public buildings on the photovoltaic elements integrated system for product life, safety, strength, weight, appearance, personality, as well as the adaptability of structure is going to have more and more demanding, this PV artifacts, research and innovation will make even more of a challenge.
It goes without saying that BIPV dance national energy-saving wind, photovoltaic PV artifacts will bring PV manufacturers of architectural building materials a quick catch up, fight fierce competition in new markets.
Original title: Optical construction: new PV Application market heights