Energy-saving photovoltaic agricultural greenhouse with dimming function

Abstract

The invention relates to an energy-saving photovoltaic agricultural greenhouse with a dimming function. The energy-saving photovoltaic agricultural greenhouse comprises a photovoltaic agricultural greenhouse body, a cleaning device, a condensation removal device, a drip irrigation, sprinkling irrigation and fertilization integrated device and a heat exchange device. The energy-saving photovoltaic agricultural greenhouse has the advantages that working efficiency of photovoltaic modules is improved, energy resources are saved, and the growing environment of crops is optimized.

Description

technical field [0001] The invention relates to an energy-saving photovoltaic agricultural greenhouse with a dimming function. Background technique [0002] Since only solar energy in a certain spectral range can produce photoelectric effect, only about 15% of the solar energy actually projected onto the photovoltaic panel is converted into electrical energy, while the remaining more than 85% of the solar energy is converted into heat energy and discharged into the environment. At present, there are many photovoltaic agricultural greenhouse projects in China, but all of them use crystalline silicon or amorphous silicon thin film modules to lay on the greenhouse body, and they are only used to generate electricity without processing the heat. [0003] On the one hand, if this part of the heat is not taken away in time, the temperature of the photovoltaic cell will increase, resulting in a decrease in photoelectric conversion efficiency; on the other hand, the temperature of t...

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Problems solved by technology

[0003] On the one hand, if this part of the heat is not taken away in time, the temperature of the photovoltaic cell will increase, resulting in a decrease in photoelectric conversion efficiency; on the other hand, the temperature of the agricultural greenhouse at night is low, which will affect the growth of crops. Usually we need to heat up the greenhouse. It takes a lot of energy to heat up

[0004] Because photovoltaic modules are installed on the top of the agricultural greenhouse, it will affect the light transmission of the greenhouse, which will affect the growth of vegetation. In order to improve the light transmittance, the installation of modules will be reduced, and the modules will be laid at intervals, but even so, the sun will always only shine In those fixed light-transmitting points, while plants in other places rarely receive sunlight, corresponding supplementary light measures must be taken inside the greenhouse

There are also photovoltaic modules with different light transmittances erected on the greenhouse, but this will greatly increase the cost

[0005] In addition, traditional photovoltaic agricultural greenhouses still cannot remove a large amount of condensation on the roof, which affects the growth of crops; the irrigation form of crops is single, and cannot meet the irrigation needs of different crops and different growth cycles

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