With the official implementation of the Kyoto Protocol,

how to achieve sustainable development in environmental protection has become the strongest global call.

As a developing country, China's energy consumption is growing at an astonishing rate year by year,

and buildings, as major energy consumers,(the energy consumption of buildings in developed countries generally accounts for1/3or more), making energy-saving benefits particularly important,BIPVthus becoming21a hotspot in the market for building and photovoltaic technology in this century.

 

 

What isBIPV ?

 

Building Integrated Photovoltaics (i.e.BIPV Building Integrated PV,PVi.e.Photovoltaic) is a technology that integrates solar power generation (photovoltaic) products into buildings. Photovoltaic building integration(BIPV)differs from photovoltaic systems attached to buildings(BAPV:Building Attached PV) in form.In form.

 

According to the different ways photovoltaic arrays are combined with buildings, photovoltaic building integration can be divided into two main categories: one is the combination of photovoltaic arrays and buildings. The other is the integration of photovoltaic arrays and buildings. Examples include photovoltaic tile roofs, photovoltaic curtain walls, and photovoltaic skylights. Among these two methods, the combination of photovoltaic arrays and buildings is a commonly used form, especially in combination with building roofs. Since the combination of photovoltaic arrays and buildings does not occupy additional ground space, it is the best installation method for photovoltaic power generation systems in urban areas, thus attracting much attention. The integration of photovoltaic arrays and buildings isBIPVa more advanced form, which has higher requirements for photovoltaic components. Photovoltaic components must not only meet the functional requirements of photovoltaic power generation but also consider the basic functional requirements of the building.

 

 

BIPV Advantages and Disadvantages

 

Advantages:

 

• Green energy.Solar photovoltaic building integration generates green energy, utilizing solar power generation without polluting the environment. Solar energy is the cleanest and free, and no ecological side effects are produced during the development and utilization process. It is also a renewable energy source that is inexhaustible.
• Does not occupy land.Photovoltaic arrays are generally installed on idle roofs or exterior walls, without requiring additional land, which is especially important for urban buildings where land is expensive; summer is the peak season for electricity consumption, which coincides with the period of maximum sunlight and the highest power generation of photovoltaic systems, thus playing a role in peak shaving for the grid.
• The solar photovoltaic building integration technology uses grid-connected photovoltaic systems,which do not require battery storage,saving investment and not being limited by the battery's charge state, allowing full utilization of the electricity generated by the photovoltaic system.
• It plays a role in building energy saving.Photovoltaic arrays absorb solar energy and convert it into electrical energy, significantly reducing the overall outdoor temperature, decreasing the thermal load of walls and the cooling load of indoor air conditioning, thus also contributing to building energy saving.

 

Disadvantages:

 

• Higher cost. Buildings designed and constructed with integrated photovoltaic power generation systems are more expensive, and there is still room for improvement in scientific and technological aspects.
• High cost. The cost of solar power generation is high. The cost of solar power generation is double that of conventional power generation.
• Unstable. Solar photovoltaic power generation is unstable, greatly affected by weather, and has volatility. This is because the sun does not shine all day.24Therefore, how to solve the volatility of solar photovoltaic power generation and how to store electricity are urgent issues to be addressed.

 

 

BIPVBuilding forms

 

can be said that photovoltaic building integration is suitable for most buildings, such as flat roofs, sloped roofs, curtain walls, canopies, etc.

 
 

Flat roofs  From the perspective of power generation, flat roofs are the most economical:1can be installed at the optimal angle to obtain the maximum power generation,;2can use standard photovoltaic components with optimal performance,;3and do not conflict with the building's functions.4The cost of photovoltaic power generation is the lowest.,From the perspective of power generation economics, it is the best choice.

 

Sloped roofs  South-facing sloped roofs have good economics:1can be installed at the optimal angle or close to the optimal angle, thus obtaining the maximum or relatively large power generation,;2can use standard photovoltaic components, which have good performance and low cost,;3and do not conflict with the building's functions.4and the cost of photovoltaic power generation is the lowest or relatively low, making it one of the preferred installation options for photovoltaic systems. Other directions(slightly south)are secondary.

 

Photovoltaic curtain walls   Photovoltaic curtain walls must meetBIPVRequirements: In addition to the power generation function, all functional requirements of the curtain wall must be met: including external maintenance, transparency, mechanics, aesthetics, safety, etc. The component cost is high, and the photovoltaic performance is relatively low.;It must be designed, constructed, and installed simultaneously with the building, and the progress of the photovoltaic system project is constrained by the overall progress of the building.;The photovoltaic array deviates from the optimal installation angle, resulting in low output power.;The cost of power generation is high.;Enhance the social value of the building and bring about the effect of a green concept.

 

 

Photovoltaic canopy  The photovoltaic canopy requires transparent components, and the component efficiency is relatively low.;In addition to power generation and transparency, the canopy components must meet certain mechanical, aesthetic, and structural connection requirements, and the component cost is high.;The cost of power generation is high.;Enhance the social value of the building and bring about the effect of a green concept.

BIPV Architectural design

 

Photovoltaic component performance requirementsAs an ordinary photovoltaic component, it only needs to passIEC61215the test, meeting the resistance to130km/h(2,400Pa)风压和抗25mm直径冰雹23m/s的冲击的要求。用作幕墙面板和采光顶面板的光伏组件，不仅需要满足光伏组件的性能要求，同时要满足幕墙的三性实验要求和建筑物安全性能要求，因此需要有更高的力学性能和采用不同的结构方式。例如尺寸为1200mm×530mm的普通光伏组件一般采用3.2mm厚的钢化超白玻璃加铝合金边框就能达到使用要求。但同样尺寸的组件用在BIPV建筑中，在不同的地点，不同的楼层高度，以及不同的安装方式，对它的玻璃力学性能要求就可能是完全不同的。南玻大厦外循环式双层幕墙采用的组件就是两块6mm厚的钢化超白玻璃夹胶而成的光伏组件，这是通过严格的力学计算得到的结果。

 

 

美学要求 BIPV建筑首先是一个建筑，它是建筑师的艺术品，就相当于音乐家的音乐，画家的一幅名画，而对于建筑物来说光线就是他的灵魂，因此建筑物对光影要求甚高。但普通光伏组件所用的玻璃大多为布纹超白钢化玻璃，其布纹具有磨砂玻璃阻挡视线的作用。如果BIPV组件安装在大楼的观光处，这个位置需要光线通透，这时就要采用光面超白钢化玻璃制作双面玻璃组件，用来满足建筑物的功能。同时为了节约成本，电池板背面的玻璃可以采用普通光面钢化玻璃。一个建筑物的成功与否，关键一点就是建筑物的外观效果，有时候细微的不协调都是不能容忍。但普通光伏组件的接线盒一般粘在电池板背面，接线盒较大，很容易破坏建筑物的整体协调感，通常不为建筑师所接受，因此BIPV建筑中要求将接线盒省去或隐藏起来，这时的旁路二极管没有了接线盒的保护，要考虑采用其他方法来保护它，需要将旁路二极管和连接线隐藏在幕墙结构中。比如将旁路二极管放在幕墙骨架结构中，以防阳光直射和雨水侵蚀。普通光伏组件的连接线一般外露在组件下方，BIPV建筑中光伏组件的连接线要求全部隐藏在幕墙结构中。

 

 

结构性能配合  在设计BIPV建筑时要考虑电池板本身的电压、电流是否方便光伏系统设备选型，但是建筑物的外立面有可能是一些大小、形式不一的几何图形组成，这会造成组件间的电压、电流不同，这个时候可以考虑对建筑立面进行分区及调整分格，使BIPV组件接近标准组件电学性能，也可以采用不同尺寸的电池片来满足分格的要求，以最大限度地满足建筑物外立面效果。另外，还可以将少数边角上的电池片不连接入电路，以满足电学要求。

 

 

利用太阳能  太阳能为保护环境创造了有利条件，于是许多建筑学家巧妙利用太阳能建造太阳能建筑。

 

1、太阳能墙：美国建筑专家发明太阳能墙，是在建筑物的墙体外侧装一层薄薄的黑色打孔铝板，能吸收照射到墙体上的80%的太阳能量。被吸入铝板的空气经预热后，通过墙体内的泵抽到建筑物内，从而就能节约中央空调的能耗。

 

2、太阳能窗：德国科学家发明了两种采用光热调节的玻璃窗。一种是太阳能温度调节系统，白天采集建筑物窗玻璃表面的暖气，然后把这种太阳能传递到墙和地板的空间存储，到了晚上再放出来；另一种是自动调整进入房间的阳光量，如同变色太阳镜一样，根据房间设定的温度，窗玻璃或是变成透明或是变成不透明。3、太阳能房屋：德国建筑师特霍尔斯建造了一座能在基座上转动跟踪阳光的太阳能房屋。该房屋安装在一个圆盘底座上，由一个小型太阳能电动机带动一组齿轮，使房屋底座在环形轨道上以每分钟转动3厘米的速度随太阳旋转。这个跟踪太阳的系统所消耗的电力仅为该房太阳能发电功率的1%，而该房太阳能发电量相当于一般不能转动的太阳能房屋的两倍。
 

BIPV 创新经验

 

 

 

 

 

BIPV 应用展望

1、高能耗工业建筑光伏应用

 

《可再生能源电力配额及考核办法》“各类售电公司、参与电力直接交易的电力用户和拥有自备电厂的企业接受配额考核。通过对各配额义务主体核算可再生能源电力绿色证书数量考核其配额完成情况。"

 

 

2、既有建筑平改坡光伏应用

 

《国务院政策例行吹风会-Renovation of Old Residential Areas in Towns[CCTV Reporter]May I ask Vice Minister Huang Yan, you just mentioned that one of the difficulties in the renovation of old residential areas is funding. What models might be adopted in the future to support the renovation of old residential areas through market-oriented methods??[Vice Minister of Housing and Urban-Rural Development Huang Yan]I went to Guangxi for research last week and also raised this topic with the mayor. Everyone feels that allowing the market to participate more in the renovation of old residential areas is an innovation in the mechanism. The use of financial support cannot just be an investment that cannot be turned around; this is a prerequisite.

 

3Photovoltaic application in the construction of new photovoltaic villages

 

"Opinions of the Central Committee of the Communist Party of China and the State Council on Establishing and Improving the System and Policy Framework for Urban-Rural Integrated Development" "Adhere to the new development concept, promote high-quality development, prioritize agricultural and rural development, coordinate the promotion of the rural revitalization strategy and the new urbanization strategy, aim to narrow the development gap between urban and rural areas and the gap in residents' living standards, and accelerate the formation of a new type of urban-rural relationship characterized by mutual promotion between industry and agriculture, mutual complementarity between urban and rural areas, comprehensive integration, and common prosperity, and accelerate the modernization of agriculture and rural areas."

.

 

 

Image

Classification of Photovoltaic Power Stations1Building photovoltaics belong to distributed photovoltaics, which have advantages over centralized photovoltaic power stations, such as saving land, consuming energy nearby, and peak power regulation. Building photovoltaics combine photovoltaic power generation with buildings, laying photovoltaic devices on the outer structure of buildings to generate electricity.

 

Building photovoltaics can be divided into two categories:

 

BAPV

1, installed photovoltaics,Building attached photovoltaics, where the photovoltaic system is attached to the surface of the building., building integrated photovoltaics,Building integrated Photovoltaic

2, installed photovoltaics,BIPV, where the photovoltaic system becomes a direct material of the building.This is a simple combination method suitable for the renovation of existing roofs. Additional steel structure brackets or sliding rails are directly installed on the building roof, and photovoltaic panels are fixed for power generation. Currently"

 

Building attached photovoltaicsThe typical application of photovoltaic roofs promoted at the county level all adopts this method.The main problems encountered are:, load. The original roof load does not meet the requirements for the secondary installation of photovoltaic panels, and the original roof needs to be reinforced. Some reinforcements are difficult. There have even been news reports of roofs collapsing due to snow disasters and photovoltaic panels being blown away by strong winds., waterproofing.It may damage the original roof waterproof layer, requiring repairs after construction, which brings drainage hazards.

Classification of Photovoltaic Power Stations2:Building attached photovoltaics, safety and actual service life of photovoltaic panels. Auxiliary components such as inverters and junction boxes are often exposed, affecting aesthetics and being easily damaged, reducing

 

Building attached photovoltaicsactual service life.

1It is often a project that requires a one-time investment with returns over many years, and owners pay attention to return on investment and safety. Once a major loss occurs, there may be situations where rights and interests cannot be effectively guaranteed. However,

2integrating photovoltaics with buildings can avoidBuilding attached photovoltaicsmany problems. It has advantages such as long service life, reliable load-bearing, reliable waterproofing, and ease of operation and maintenance.

3Classification and DevelopmentBuilding attached photovoltaicsis when the photovoltaic system becomes a direct material of the building. A series of photovoltaic building materials such as photovoltaic roofs, photovoltaic glass, photovoltaic curtain walls, and photovoltaic tiles have been developed.

 

Building attached photovoltaicsRelated products andBIPVComparisonBuilding attached photovoltaicscan be divided into crystalline silicon type and thin film type by material.

 

BIPVCrystalline silicon type


BIPVhas high conversion efficiency, with monocrystalline reaching

Classification of Photovoltaic Power Stations3:BIPV.Building attached photovoltaicsCrystalline silicon solar cells are opaque, and crystalline silicon components are mainly used in opaque building projects. Of course, crystalline silicon photovoltaic curtain walls can also meet certain light transmission requirements with double-sided glass. Crystalline silicon type is the most familiar to everyone.

 

BIPVLONGi Green Energy launched


LONGi RoofBIPVand25%LONGi Jin
, Jinko SolarThe main problems encountered are:Jingcai, waterproofing., CITIC BoThe main problems encountered are:Zhiding, waterproofing., and Tesla launchedThe main problems encountered are:Solar roof V1-V3, waterproofing., and Jinghua New Energy launchedThe main problems encountered are:Huading, waterproofing., and Shangmai New Energy launchedGigawatt, all of which are crystalline silicon products.The main problems encountered are:: Wuxi Suntech's headquarters crystalline silicon photovoltaic curtain wall, opaque type, waterproofing.: Crystalline silicon photovoltaic curtain wall, light transmission effectThe main problems encountered are:Thin film type, waterproofing., currently mainly includes cadmium telluride
 

Classification of Photovoltaic Power Stations4(CdTe)

 

Classification of Photovoltaic Power Stations5cells, copper indium gallium selenide

 

(CIGS)BIPVcells, and perovskite solar cells.The average efficiency of cadmium telluride in commercial applications is14.7%.(CIGS)电池、钙钛矿太阳电池。
碲化镉商业应用上的平均效率为14.7%The copper indium gallium selenide battery currently has the highest efficiency among thin-film types, approaching20%In terms of efficiency, it is not as good as crystalline silicon types, but thin-film types also have advantages that crystalline silicon types do not possess: adjustable transparency, better low-light performance, and superior temperature coefficients. This ensures that it can maintain operation under extreme conditions such as high temperatures and low light.

Classification of Photovoltaic Power Stations6Colorful thin-film battery architectural effect

 

Thin-film batteries are not a new concept that has emerged recently.20Century70The thin-film battery technology was introduced in the 1990s, surpassing crystalline silicon batteries for a time, and was even referred to asThe main problems encountered are:the next generation of photovoltaic technology., waterproofing.Later, due to difficulties in improving efficiency, it gradually fell out of favor.
And now,BIPVthe explosion of new opportunities has brought new chances for thin-film batteries. Currently, domestic companies in the thin-film sector include Longyan Energy, Mingyang Smart's subsidiary Ruike New Energy, Hangzhou Qiana, etc. Meanwhile, crystalline silicon batteries have major giants in the photovoltaic industry. At present, the crystalline silicon camp appears more glamorous.

 

BIPVIt can be divided into building material type and component type based on product presentation.


The main problems encountered are:Building material type, waterproofing.Integration is more complete, fully merging photovoltaic cells into building materials, which may not differ much from traditional building materials in appearance. It places higher demands on material strength and performance.The main problems encountered are:Building material type, waterproofing.It is a relatively ideal form, but it has high customization requirements, high strength requirements, and high costs.
Tesla's solar tiles areThe main problems encountered are:Building material type, waterproofing.According to feedback from Musk's first batch of customers, they are suitable forThe main problems encountered are:financially insensitive, waterproofing.groups to use, you can ponder.

Classification of Photovoltaic Power Stations7Little Pony andTesla roof

 

The main problems encountered are:Component type, waterproofing.Leans towards standardized products, combining photovoltaic components with building components into an overall component, which is easier to distinguish from traditional building materials in appearance. Currently, the mainstream in the market is this type, mainly consisting of photovoltaic roofs, photovoltaic curtain walls, and photovoltaic sunshades, which can maintain the highest degree of component power generation efficiency and maximize the effective power generation area of the cells. However, standardized components also limit application scenarios, mainly applied in large-area roofs of industrial and commercial factory buildings, rain shelters, and the outer curtain walls of large buildings.
Now photovoltaic component companies have also launched transparent and colorful photovoltaic curtain walls, providing design institutes with more design style options to meet certain architectural aesthetic design requirements.

Photovoltaic curtain walls possess dual attributes of photovoltaic and architecture, requiring simultaneous design, construction, and installation with the building, resulting in higher costs. In addition to power generation functions, they must meet architectural functional requirements: external maintenance, transparency, mechanics, aesthetics, safety, etc. Architectural functional requirements are higher than photovoltaic power generation requirements and must be prioritized, so sometimes photovoltaic attributes may be sacrificed, such as higher power generation efficiency, better light angles, and greater power generation capacity.

Classification of Photovoltaic Power Stations8Constructed photovoltaic roof, double-sided glass and battery cells

 

Classification of Photovoltaic Power Stations9:2014In 2017, King's Cross Station in London

 

The photovoltaic roof of King's Cross Station in London, in order to meet transparency requirements, shows that the battery cells are relatively sparse, sacrificing higher wattage and power generation efficiency.

BIPVThe three generations of technological development


In summary, we can concludeBIPVthe process of technological development.

The first generation, photovoltaic arrays rely on some additional supports and fixing devices installed on the surface of buildings, with an appearance similar toBuilding attached photovoltaicsmost crystalline silicon types,BIPVwhich are currently mainstream.

The second generation, mainly thin-film batteries, integrates photovoltaic components with building materials, resulting in an aesthetically pleasing appearance. However, the arrangement of power electronic devices and wiring is inconvenient, with low reliability and high maintenance costs.

The third generation integrates photovoltaic systems, building materials, and power conversion supporting devices. It has high customization requirements and high costs. There is a need to develop newer generation technologies and materials.

 

With the further improvement of the economic viability of photovoltaic building-related products, photovoltaic buildings will achieve leapfrog development, contributing to achieving "carbon neutrality" in the construction field. This article will introduce6cases of photovoltaic building applications using power-generating glass building materials for reference.

 

 

1Xiong'an Business Service Center

 

The Xiong'an Business Service Center project is located on the north side of the Xiong'an Citizen Service Center, serving as a functional area for the deconcentration of non-capital functions from Beijing, focusing on business, finance, outsourcing services, and related industries in the free trade pilot zone, creating an industrial cluster that integrates headquarters economy and technological innovation. Once completed, the Xiong'an Business Service Center will provide comprehensive service guarantees and support for the construction and development of the Xiong'an New Area together with the Xiong'an Citizen Service Center.
 

The exhibition center will achieve a three-star green building evaluation standard, and the project will use high-efficiency electromechanical equipment, including high-efficiency energy-saving transformers and high-efficiency energy-saving pumps, with water-saving devices meeting1energy efficiency standards, and lighting using non-hazardous high-efficiencyLEDlighting, with a controllable indoorPM2.5air quality monitoring system.

 

The project features the first large-area ceramic tiles interspersed with photovoltaic tiles in the country, where traditional ceramic tiles have good insulation and heat preservation functions, while solar photovoltaic panels continuously provide clean energy for the building.

 

The frosted photovoltaic tiles combined with ceramic tiles balance power generation efficiency and overall architectural effect while avoiding light pollution caused by reflection.

 

 

The project uses10355cadmium telluride thin photovoltaic flat tiles, with an installed capacity of about486.68kWp, with an annual power generation exceeding40ten thousand kilowatt-hours, equivalent to reducing nearly400tons of carbon dioxide emissions each year.

 

 

2China Pavilion at the World Expo.

 

2019The China Pavilion at the 2019 Beijing International Horticultural Exhibition is located at the end of the landscape axis in the core scenic area of the Expo, occupying the most important position in the entire park. It is one of the most important buildings of the Expo, along with the International Pavilion, Performance Center, Lawn Theater, and Tian Tian, forming the core scenic area of the horticultural exhibition.

WithThe main problems encountered are:Green Living, Beautiful Home, waterproofing.as the theme of2019The 2019 Horticultural Expo is divided into5five areas: the China Pavilion, International Pavilion, Plant Pavilion, Life Experience Pavilion, and Performance Center. At the foot of the mountains, beside the Guishui River, the Expo resembles a green painting, showcasing to the world.The main problems encountered are:Green Business Card, waterproofing.Image
 

 

The steel structure roof of the China Pavilion is installed with1024golden photovoltaic glass, which can generate electricity even without direct sunlight, making it more in line with the architectural shape. The glazed tiles gather solar energy, creating a brilliant picture that lights up the night of the Expo. 

 

 

The project adopts various green technologies, including solar photovoltaic technology, making the China Pavilion a living, breathing building. The project successfully passed the green building label evaluation and obtained the three-star green building label.

 

 

3, Datong Future Energy Pavilion

 

The Datong Future Energy Pavilion, as the most important landmark building in the Datong International Energy Revolution Technology Innovation Park, undertakes the strategic function of comprehensively promoting and displaying the achievements of the energy revolution development in Shanxi, leading the innovation of energy revolution technology. It is a comprehensive exhibition hall that integrates the Energy Strategic Planning Hall, Energy Civilization Communication Hall, Energy Revolution Demonstration Hall, Energy Science Popularization Education Hall, Energy Life Experience Hall, and Energy Technology Display Hall.The main problems encountered are:Six Halls in One, waterproofing.To reflect Shanxi Province's leading image in the global energy development and transformation process, the building itself is also part of the energy revolution display.

 

 

The Datong Energy Pavilion achievesThe main problems encountered are:three-star green building+ultra-low energy consumption certification+healthy building, waterproofing.This ultra-high-performance building indicator, under the design concept ofThe main problems encountered are:passive priority, active optimization, waterproofing.utilizes multiple passive technologies, including an exterior protective structure with excellent insulation performance and high airtightness, energy-efficient passive doors and windows, summer shading, prevention of structural thermal bridges, a ducted wind system, and organized indoor fresh air supply and heat recovery systems.

 

The Datong Energy Pavilion maximizes the use of the building's exterior surface,achieving a photovoltaic power generation capacity of nearly1megawatts through integrated building photovoltaic technology, along with energy storage direct current microgrid technology to improve the efficiency of renewable energy utilization, thus achievingThe main problems encountered are:zero energy consumption, waterproofing.building energy consumption goals,making it the first positive energy building of its kind in the country.

 

 

 

4, Jiaxing Railway Station

 

Jiaxing Railway Station was designed by MAD, led by Ma Yansong,MADarchitecture firm, and is known asThe main problems encountered are:the Train Station in the Forest., waterproofing.ImageThe renovation and expansion project started on2020year6month23day, with the station designed as a single ground level and multiple underground levels, making it China's first fully sunken train station.

 The renovation of the train station involved planting over1500trees, including beech, camphor, osmanthus, maple, black maple, dawn redwood, and cherry blossom. The spiritual axis centered on the old station building runs through the entire area, with beech trees planted on both sides. Once fully grown, the tree crowns will connect and cover the entire northern square in front of the station. Large trees such as beech, camphor, osmanthus, and maple are planted both inside and outside the station.500Many beech trees are over30years old. 

 

Jiaxing Railway Station is not only known asThe main problems encountered are:the Train Station in the Forest., waterproofing.but also a power-generatingThe main problems encountered are:green, waterproofing.train station. According to statistics, the roofs of the north and south station buildings are covered with about1.2ten thousand high-efficiency cadmium telluride thin-film photovoltaic materials, and the project is expected to generate110ten thousand kilowatt-hours of electricity annually, equivalent to an annual reduction of about1000tons of carbon dioxide emissions each year.

 

 

Jiaxing Railway Station cleverly utilizes photovoltaic materials to transformThe main problems encountered are:the fifth facade of the building (the roof) into, waterproofing.an ecological fifth facade.The main problems encountered are:This not only highlights the aesthetic function of the roof but also represents a bold exploration and attempt of green and clean photovoltaic technology on building roofs, fully showcasing the, waterproofing.,green building conceptThe main problems encountered are:and providing important references and demonstrations for the construction and renovation of public buildings such as high-speed railway stations, airports, exhibition centers, and shopping malls in the future., waterproofing.The renovated Jiaxing Railway Station may bring transformative inspiration to Chinese cities undergoing urban construction. Beyond pragmatism and functionalism, transforming municipal and public buildings into high-quality cultural urban spaces will be the next milestone in the development of Chinese cities.

 , Jiaxing Xiuzhou Science and Technology Innovation Service Center

 

 

5The Jiaxing Xiuzhou District Science and Technology Innovation Service Center project is located in Jiaxing Xiuzhou District and serves as the new administrative approval service center for Jiaxing Xiuzhou District. The Xiuzhou Photovoltaic Town aims to build a first-class domestic demonstration area for large-scale application of distributed photovoltaic power generation, a globally leading photovoltaic computing research and development innovation area, and a nationally renowned characteristic photovoltaic intelligent manufacturing center.

 

Suitable for work, living, tourism, benefiting production, benefiting the people, benefiting life.The main problems encountered are:宜业、宜居、宜游、惠产、惠民、惠生, waterproofing.Photovoltaic characteristic town.

 

 

The photovoltaic curtain wall adopts a component-based bright frame and partial vertical bright horizontal hidden combination curtain wall system, with a fish scale area using cadmium telluride power generation glass, with a maximum size of1592mm*2185mmTotal30Size931Pieces40%Translucent cadmium telluride film translucent power generation glass, total2013Square meters, with an installed capacity of about150KWThe structure using photovoltaic power generation glass is:5TP+3.2CDTE+5TP+12A+8TPImage

 

 

The project solved many high-difficulty technical problems of the photovoltaic curtain wall during the design and construction process, such as the strict requirements for the uniformity of the color of photovoltaic power generation glass andLOW_Ethe glass, oversized dimensions, design of power generation glass string, and hidden wiring design, etc.

 

 

6, Shenzhou International colored pattern photovoltaic curtain wall

 

The Shenzhou International colored pattern photovoltaic curtain wall project is located on the side of the factory of Ningbo Shenzhou International Group Co., Ltd. This photovoltaic curtain wall project is invested by State Grid (Ningbo) Comprehensive Energy Service Co., Ltd., using cadmium telluride film colored pattern photovoltaic building materials, and is a model project for the green energy-saving renovation of existing buildings.

 

The project adopts photovoltaic building integration design, transforming existing factory buildings, which are not only aesthetically pleasing and fashionable, but also heat-insulating and energy-saving, and can bring continuous25more than years of power generation benefits to enterprises.

 

 

As a market worth trillions, further elaboration on the economic viability, potential scale, and trends of the industry.BIPVExpected to become a new windfall in infrastructure

 

BIPVPhotovoltaic building integration (

 

BIPVBuilding Integrated PV) is a technology that integrates solar power generation (photovoltaic) products into buildings. It is not a new concept, but rather an application scenario of photovoltaics. Its earliest application can be traced back to satellites and the International Space Station, where the photovoltaic power generation structure on satellites is the earliest prototype of photovoltaic and structural integration.,PVi.e.PhotovoltaicFrom the perspective of the affiliated branch, it belongs to distributed photovoltaics. Due to its combination with buildings for power generation, it brings huge energy imagination space, thus it has always been a topic of discussion and is the most promising distributed photovoltaic system. A similar branch is another branch

 

—BAPVBIPV(Building Attached Photovoltaic) refers to solar photovoltaic power generation systems installed on buildings.Whether globally or in China, building energy consumption accounts for more thanof the entire industry, making it a major industry for energy consumption and carbon dioxide emissions.

 

Photovoltaics empowering buildings can effectively solve this problem, therefore30%it is a necessary means to achieve zero energy consumption buildings. In recent years,

with the continuous decline in the cost of photovoltaic modules, the era of parity is approaching,BIPVand economic viability is highlighted.The forms of combining photovoltaics with building materials mainly include combinations with roofs, walls, and shading devices. According to the schematic diagram in "Solar Photovoltaics and Building Integration Structures" edited by Jiangsu Provincial Urban Planning and Design Institute, solar power generation systems can be combined with roofs, skylights, curtain walls, balconies, railings, and other building structures to form green, environmentally friendly, and energy-saving buildings. They can also be combined with building materials to form photovoltaic shading components and photovoltaic awning components, thus achieving the functions of shading and rain protection.BIPVCompared to traditional roofs and

 

it has stronger reliability and economic viability.

Reliability:Building attached photovoltaicsCurrently, industrial and commercial factory roofs generally use cement or color steel tiles, with a lifespan of about 

 

years, whileroofs can last for more than10years. Transforming roofs intoBIPVwill inevitably cause problems such as roof perforation and edge locking, leading to structural damage.20Economic viability:Building attached photovoltaicsGenerally speaking, traditional roofs or curtain walls do not generate benefits after construction, whileBuilding attached photovoltaicsand 

 

can generate power and save energy to create economic benefits. For those withdue to their customized characteristics, they can fully utilize the roof structure area, significantly improving the efficiency of roof or strong surface usage. Based on the revenue situation of the Fujian Production Command Center and Xingye R&D Building,Building attached photovoltaicsit can basically recover costs withinBIPV5-8BIPVyears, showing significant economic viability.This year, from the perspectives of policy, funding, and project reserves, the certainty of accelerated infrastructure investment is high,and it is expected to quickly scale up.Market potential and trends

 

The National Energy AdministrationBIPVheld a press conference on the day, stating that in the first half of the year, the domestic photovoltaic newly installed capacity

 

BIPVgrew by year-on-year

 

Among them, distributed photovoltaics newly added8month2. Looking solely at distributed photovoltaics, household photovoltaics newly added about22and commercial and industrial distributed newly added about30.88GWDistributed photovoltaic installed capacity achieved rapid development in the first half of the year.119%, It is an important component of distributed photovoltaics, and at the same time, it is one of the few19.65GWdual carbon.9.5GWDistributed photovoltaic installed capacity achieved rapid development in the first half of the year.52%，工商业分布式新增约10.7GWDistributed photovoltaic installed capacity achieved rapid development in the first half of the year.268%,分布式光伏装机上半年实现了快速的发展。BIPV是分布式光伏重要的构成部分，同时，又是少数The main problems encountered are:双碳+Infrastructure, waterproofing.A field of concept overlay, supported by short-term stable growth.

 

Tianfeng Securities estimatesto2025new factory buildings per yearBIPVThe market space is expected to reach693billion yuan,20-25yearCAGR +82.8%Image

 

Factory and warehouse correspond toBIPVpotential market

 

Industrial Securities analysis states that in the medium to long term, under the dual carbon background,BIPVit is an important lever to reduce carbon emissions during the operation of buildings, and one of the most promising directions for growth in the future,At the same time, in the medium to long term, the trend of infrastructure sinking to the county-level market has become obvious, which is expected to accelerate the promotion ofThe main problems encountered are:photovoltaic promotion at the county level, waterproofing., it is expected that2025the market size will exceed1000billion yuan.

 

BIPVMarket size estimation

 

Industry trends:The main problems encountered are:Construction+Photovoltaics, waterproofing.Strong alliances between enterprises

 

BIPVProducts are mainly composed of photovoltaic modules and building structures, among which the industrial chain of photovoltaic modules is similar toBuilding attached photovoltaicsand centralized photovoltaic power station components, and isBIPVthe main link for product iteration and cost reduction.

 

The core competitiveness of photovoltaic enterprises lies inBIPVproduct development, lacking experience in building materials and construction, limited project resources, and photovoltaic enterprises lack professional construction qualifications, architectural research and design, and construction management capabilities, making it difficult to independently enter the construction market to undertakeBIPVengineering construction;

 

On the other hand, construction enterprises have certain business resources such as industrial and commercial factory buildings and government investment platforms, which areBIPVimportant links for docking and landing, but the difficulty for construction enterprises to carry outBIPVprojects lies in that,BIPVproduct development has certain technical barriers, photovoltaic enterprise products are becoming increasingly mature, and construction units lack corresponding resources in the production of photovoltaic modules and other links. If developed independently, the R&D investment cost is high, and it is difficult to develop competitive products.

 

Construction enterprises and photovoltaic enterprises can only achieve deep binding cooperation through equity cooperation or strategic investment to exert the "fusion" effect, under the background of rapid industry expansion, to achieve rapid product release and seize market opportunities.BIPV行业快速放量背景下，实现产品快速放量，抢占市场先机。