Solar energy gravity self-cleaning system for flat plate collector

Abstract

The invention discloses a solar energy gravity self-cleaning system for a flat plate collector. The solar energy gravity self-cleaning system comprises the flat plate collector, wherein a left-side container and a right-side container, which can vertically move up and down and can absorb solar energy heat are respectively arranged outside two sides of the flat plate collector, and are filled with liquid working substance, a pipeline can move or expand and contract along the change of the gravities of the left-side container and the right-side container, the left-side container and the right-side container are respectively communicated with the two ends of the pipeline, a left-side light shield and a right-side light shield are arranged right above of the left-side container and the right-side container, and the solar energy gravity self-cleaning system further comprises a cleaning device for cleaning a glass cover plate of the flat plate collector. According to the invention, by the two water containers and the pipeline as well as mass transfer generated by absorption of the solar energy heat, the dead weights of the two containers are changed, and the collector can move up and down after the gravities of the two containers are changed to drive the cleaning device to clean the collector, so that the utilization ratio of the solar energy is improved, improvement of the solar energy utilization is facilitated, and the consumption of energy sources and manual power in a conventional cleaning mode is reduced.

Description

technical field [0001] The invention relates to the field of solar energy applications, in particular to a solar gravity self-cleaning system for flat plate heat collectors. Background technique [0002] After a long period of use of the solar panel collector, dust will accumulate on the surface of the collector, resulting in a decrease in solar transmittance and a reduction in solar conversion efficiency. The flat plate or vacuum tube collectors used in industrial, commercial and civil fields are usually not cleaned, so their solar energy utilization rate gradually decreases, and if they are cleaned regularly, they consume water, electricity, and labor, and many installation locations are not suitable for manual cleaning. cleaning. There are also cleaning systems using special materials, which can delay the accumulation of dust, but this problem cannot be completely solved and the production cost is increased. Contents of the invention [0003] The purpose of the presen...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the technical problem that after the solar collector is placed outdoors for a long time, a large amount of dust is attached to the surface of the glass cover plate, resulting in a decrease in the photothermal conversion efficiency, and to provide a heat transfer system that is heated by solar energy due to high-temperature evaporation and low-temperature condensation. The mass change causes the weight of the two containers to change, which drives the cleaning device to clean the surface of the collector, automatically cleans the glass cover of the flat collector without electricity and manpower, and improves the utilization rate of solar energy. The solar gravity self-cleaning of the flat collector system

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