"The roof is basking in the sun—generating electricity, using electricity, and counting money." This is a phenomenon that many PV systems show us, and many people may not understand it!
Generally speaking, the photovoltaic power generation system is built on the roof. During the day, the photovoltaic panels absorb solar energy, and solar inverter converts DC power to AC power, which is supplied to the household for use. The excess electricity is sent to the national grid to obtain electricity benefits. "Using electricity and counting money" is not just a saying. Photovoltaic power generation saves the daily electricity consumption. And the state gives a subsidy of 0.42 yuan per KWH for 20 years, which is a continuous and stable income.
Photovoltaic power generation has significant energy, environmental protection and economic benefits and is one of the best green energy sources. Photovoltaic power generation also requires carriers, such as the ground, roofs, greenhouses, fish ponds, barren hills, tidal flats, etc., and these carriers are very rich in rural areas.
There are many types of rural photovoltaic power generation, such as village collective photovoltaic power station, villager roof photovoltaic power station, agricultural greenhouse photovoltaic power station, fishing pond photovoltaic power station, etc. However, the most widely used and most suitable for promotion is the village collective photovoltaic power station and the villager roof photovoltaic power station. Village collective photovoltaic power plants are combined with local poverty alleviation projects, and poor households enjoy the benefits of power generation.
Especially the roof of self-built houses can be seen everywhere in the countryside. And for the farmers, there is no property dispute on the roof, no shelter from the high-rise buildings. In addition, the transparency of the air in the countryside is good, which is conducive to the power station to improve power generation efficiency.
With the construction of new rural areas, more and more rural families have built new houses, which are not only related to their living standards, but also related to the concept of rural families. As long as they get the money, most of them will choose to build new house.
How can I make the house beautiful and elegant? The roof is an important part. The common roof forms are mainly flat roofs, sloped roofs and flat-sloping roofs. What are the differences between installing photovoltaic power plants on these three roofs?
The slope of the roof is less than 5% (2.86 degrees). It saves both time and effort, simple and generous, and can be used as an activity and drying place. But the flat roof is slow to drain and is prone to leakage. At the same time, the house is very hot in summer.
The biggest advantage of installing a photovoltaic power station on a flat roof is that it is insulated and cooled. It is necessary to know that the temperature can be lowered by 5 to 7 degrees. The effect is very obvious. For flat roofs, there are two main ways to install PV power plants:
1. Steel frame shed, the so-called steel frame shed, is to install the photovoltaic power station on high bracket, which is equivalent to covering the roof with an awning that will not affect the space of the roof.
2. Bracket installation: adopt cement pier + photovoltaic bracket form. In order to ensure the power generation, it is necessary to determine the optimal tilt angle according to the actual situation. In order to ensure that the front row PV modules do not block the rear row PV modules, there needs to be enough space between the two rows of PV modules.
The sloping roof is generally more beautiful. Due to the large slope of the roof, the rainwater is easy to remove, and the construction is simple and easy to maintain. In the rainy areas, this kind of roof is generally adopted.
The biggest advantage of installing a photovoltaic power station on a sloping roof is that the building integration effect is obvious, that is to say, it is very match with the roof, which does not affect the aesthetics of the house, and can make the roof gain sense of scientific and technological.
Installation of a photovoltaic power station on a sloping roof does not require high bracket and calculation of the inclination. The installation can be carried out according to the inclination angle of the roof itself, and the installation capacity is not affected by the area. For example, if the flat roof is installed 3KW, it needs 30 square meters, but the slope roof only needs 20 square meters to install it. The large slope can also play the role of automatic cleaning of the power station.
The flat roof, as the name implies, combines the form of the above two roofs, so it combines the advantages of both roofs to simplify the building structure while enriching the building's shape.
The characteristics of this kind of roof-mounted photovoltaic power station are basically similar to the above two, but the form is more flexible. It can be built on top of a flat roof for installation and insulation, and also can be laid on a sloping roof. It is depending on personal needs.
The widespread application of photovoltaic power generation projects in rural areas will effectively promote energy conservation and emission reduction, and guide more and more families to use new energy sources to better protect the ecological environment. At the same time, photovoltaic power generation has the effect of heat insulation and cooling, beautiful appearance, can create green income, and also preserve the value of the roof of the house.