Abstract

 

1

Difficulties of BIPV propulsion:How to connect the needs of architects, photovoltaic people and investorsPerfect combination

 

The thinking of photovoltaic people is investment thinking, which is how large the area is, how many installed machines, how much is a watt, how much electricity is generated, and then how much electricity is sold at one time. If the construction department pushes photovoltaic, the first thing he immediately thinks of is new buildings. What we have been playing for so many years is basically the decoration or renovation of existing buildings.

 

The second housing and construction department immediately thought of a word that is civil architecture. These two parts actually involve two very important roles. The first is the architect, so that the architect has a choice of products and an atlas. For reference, this is still relatively difficult.

 

There is also a role is investors, investors why should choose photovoltaic. In addition, there must be subsidies for photovoltaic grid connection. For construction units, the process of finding power grid, applying for and receiving subsidies is very complicated.At present, the situation is driven by policies. The task of carbon emission reduction has begun to be decentralized. The most important question left is whether photovoltaic products can meet the needs of architects, and whether safety can be guaranteed. In addition, the city's aesthetics, service life and the relevant scoring of green buildings.

 

 

2

At present, the BIPV industry has not yet formed a set of standards,Still in the process of gradual completion

 

The development time of photovoltaic is relatively short, that is, 20-30 years, so the standard is still in short supply. Previously, the standard of photovoltaic was the standard of power system. Building is very considerate of personal safety, which is the most important point.At present, the industry does not have its own standard system. This system may cover the building itself, combined with all kinds of safety and fire prevention in the future, including all kinds of safety protection and equipment control of photovoltaic buildings in the future, and this is very important.In order to cultivate cross-border and cross-industry talents, BAPV and BIPV are all called photovoltaic building integration. The real experts in this industry are still in the future.

 

 

3

BIPV industry chain is long,

Covers both photovoltaic and architectural fields

 

If fromUpstreamFrom a perspective, architects should take into account the design of structural structure, product design, energy-saving design, physical performance design, lightning protection, electricity protection, cleaning function, etc.midstreamIt is to make products. Making products does not mean photovoltaic modules or something, as well as inverters, various supports, various power system monitoring, etc. There is also construction to assemble them. When the equipment is assembled,DownstreamIs the operation and maintenance. But from the photovoltaic point of view, including components, inverters, power equipment, cable brackets, monitoring systems, operation and maintenance of intelligent platform and so on.

 

 

4

Safety is required by photoelectric building technology

basic guarantee

 

For the technical requirements of photoelectric buildings, the first is safety. Safety is the basic point, and there are several factors that should be paid special attention to: firstFire Safety; and one moreWaterproof and leak-proofIt's not that if you sprinkle the water on it and it doesn't leak it means it's waterproof, it actually has a lot of subdivisions, for example, it's called overflow prevention, and what if it rains suddenly and suddenly? So it actually has a lot of subdivisions;Structural safety, electrical safety, such as lightning protection and grounding; there are some special circumstances, such as how to prevent it from falling off, these have a lot of safety problems.

 

 

5

Durability and intelligence

It is an important factor to consider in the design of photoelectric buildings.

 

Long-term reliability is also very important to us.Therefore, I often say that everyone must have that concept whether to do photovoltaic or from buildings. Now many people do photovoltaic or calculate how many installed machines I have, then how much money I pay per watt, then my installation cost is so much, my input cost is so much, and then how many kilowatt-hours of electricity I generate every year, according to theoretical calculations, for example, Zhejiang has about 1000 hours of electricity per watt, then multiplied by the income per watt per kilowatt, and then divided by the recovery cycle. This is very wrong.

 

Special attention should be paid to its durability, and the quality of its installation and operation and maintenance directly affects this part.Therefore, to have good construction quality, products with long durability should be used. Many materials may not live for so many years. In the middle, replacement is not only an increase in cost, but also very troublesome and will bring maintenance costs.

 

And the third is the part where we're actually thinking about intelligence.I think this piece has become particularly important in architecture. Maybe the regular photovoltaic is a little ordinary and I found it out when it doesn't generate electricity, or the owner asks me for help and I will respond to you 24 hours a day, or I will take the initiative to tell the owner that it doesn't generate electricity and I will come and help you look at it. However, buildings cannot be like this. Buildings are always looking at something wrong and you must start to do it quickly. Otherwise, it will have a great impact, because buildings are part of people's life, so I think this piece is still very important.

 

 

6

A contradiction: the customization attribute of architecture and the scale attribute of photovoltaic

 

Now photovoltaic enterprises are in the direction of production, to the direction of the product is to scale. The building is different from other products. It is customized. The building owner will not build a building exactly like the building next to it. But photovoltaic and hope that a product can adapt to different buildings. This is the contradiction between the customization of buildings and the scale of photovoltaic.Then how to solve this problem? We should take the road of economization, and don't want to be innovative in all buildings.Of course, it can also be appropriately innovated. If you want to be a landmark building, it will definitely cost money. For example, if you order a BMW, you can add money to buy some customized products. The same is true of architecture, which must be personalized at a greater cost.Therefore, the direction of future productization is to make both standardized products and customized products.

 

 

7

BIPV compared to traditional BAPVhave better

Waterproof performance

 

Now the BAPV is divided into two kinds, one kind is similar to the BAPV installed on the cement roof with the bracket scheme to install the traditional components, but another field is the BAPV on the industrial plant, especially the color steel tile.The huge pain point of BAPV comes from the fact that we thought it would not leak water before installation, but it would leak water after installing photovoltaic.Because between this traditional industrial-grade BAPV bracket scheme and this aluminum-zinc plated steel plate, one is aluminum alloy material and the other is aluminum-zinc plated material, they will naturally undergo a change reaction, accelerate its aging and accelerate its corrosion. Perhaps the roof itself will have corrosion, but through this acceleration, the entire corrosion area will be greatly accelerated, then there will be a lot of water leakage points, and this hidden danger has to be seen. If the owner's plant does not need to have so many waterproof requirements, then the traditional BAPV can also be installed, especially the plant that may not last so long.However, if it is a high-quality development enterprise, which is very concerned about the leakage of its own factory buildings, fire and wind resistance, and even enterprises with more green electricity needs, they may have to consider more BIPV solutions.