Self-cleaning cpc concentrated photovoltaic energy-saving flat roof based on sponge city

Abstract

The invention discloses a self-cleaning CPC concentrating photovoltaic energy-saving flat roof based on sponge city, which includes a flat plate, and the side walls of the flat plate are evenly distributed with CPC concentrators with openings outward, and the side walls of the flat plate are embedded with multiple A photovoltaic panel, the side wall of the CPC concentrator is provided with a groove, the side wall of the groove is rotatably connected with a reciprocating lead screw, the reciprocating lead screw is threaded with a lead screw nut, and the lead screw nut is installed There is a cleaning device for cleaning the dust on the surface of the CPC concentrator and photovoltaic panels. The present invention can cool down the power generation components in the photovoltaic panel by setting the condensation pipe, and delay the aging speed of the power generation components. During the stretching process, the cooling liquid is circulated to better absorb the heat on the photovoltaic panel, and at the same time, the water in the water storage tank is pumped into the water storage cavity, and the surface of the photovoltaic panel and CPC concentrator is sprayed to cool down and clean.

Description

technical field [0001] The invention relates to the technical field of sponge city construction, in particular to a self-cleaning CPC concentrating photovoltaic energy-saving flat roof based on the sponge city. Background technique [0002] Sponge city is a new generation of urban stormwater management concept. It means that the city can absorb, store, infiltrate and purify water when it rains like a sponge. Free migration, the water-collecting CPC concentrating photovoltaic energy-saving roof can collect rainwater for its own use, preheat domestic water, save resources, and efficiently collect and utilize rainwater in sponge cities. [0003] Since the concentrating multiple of the CPC concentrator can reach 2 to 6 times, it can improve the efficiency of solar energy utilization and reduce the number of photovoltaic cells, but this will make the temperature of the surface of the photovoltaic panel increase geometrically, and as the photovoltaic panel The higher the received...

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Problems solved by technology

[0003] Since the concentrating multiple of the CPC concentrator can reach 2 to 6 times, it can improve the efficiency of solar energy utilization and reduce the number of photovoltaic cells, but this will make the temperature of the surface of the photovoltaic panel increase geometrically. The higher the received light intensity and temperature, the greater the impact on the power generation components and inverter, and the effective utilization rate of the power generation components in the photovoltaic panel is reduced, which reduces the power generation efficiency of the photovoltaic panel and shortens the service life of the photovoltaic panel. In addition, during the use of photovoltaic panels and CPC concentrators, there will be a certain amount of dust adsorbed on their surfaces. Since dust will scatter sunlight, the intensity of sunlight will be greatly weakened, thereby affecting the CPC concentrator. The light concentrating effect of the light device on the sunlight affects the power generation efficiency of the photovoltaic panel, and after the accumulation of dust on the surface of the photovoltaic panel, the part of the photovoltaic panel covered by the dust will heat up much faster than the part not covered by the dust. The local temperature of the photovoltaic panel is too high to produce a hot spot effect, which will aggravate the aging of power generation components and lead to a decrease in power generation efficiency

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