Self-cleaning type CPC concentrating photovoltaic energy-saving flat roof based on sponge cities

Abstract

The invention discloses a self-cleaning type CPC concentrating photovoltaic energy-saving flat roof based on sponge cities. The flat roof comprises a panel. CPC condensers with outward openings are evenly distributed on the side wall of the panel, a plurality of photovoltaic plates are embedded at the side wall of the panel, grooves are formed in the side walls of the CPC condensers, the side walls of the grooves are rotationally connected with reciprocating lead screws, lead screw nuts are in threaded connection with the reciprocating lead screws, and the lead screw nuts are provided with cleaning devices for cleaning away dust on the surface of the photovoltaic plates and the CPC condensers. By arranging a condensation pipe, power generation assemblies inside the photovoltaic plates canbe cooled, and the aging speed of the power generation assemblies is decreased. By arranging a first stretchable air bag and a second stretchable air bag, when the first stretchable air bag and the second stretchable air bag is constantly compressed and stretched, coolants are recycled, heat on the photovoltaic plates is better absorbed, meanwhile, water in a water storage box is pumped into a water storage cavity, and watering cooling cleaning can be performed on the surfaces of the CPC condensers and the photovoltaic plates.

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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