Photovoltaic photo-thermal integrated circulation system for greenhouse

Abstract

The invention relates to a photovoltaic photo-thermal integrated circulation system for a greenhouse. A photovoltaic photo-thermal assembly is connected with a public water network, a power network and a low-temperature heat accumulation water tank, power generation waste heat and unutilized solar irradiation are utilized to the most degree while power generation, the power generation efficiency of a photovoltaic cell is improved, and low-temperature hot water is produced and can be used for greenhouse humidification. A high-temperature heat accumulation water tank is connected with the low-temperature heat accumulation water tank through a heat pump unit and produces and stores high-temperature hot water for heating a greenhouse space. A ground source heat exchanger is arranged behind the heat pump unit and can extract a seasonally stored underground heat source for auxiliary heating of the high-temperature heat accumulation water tank. The photovoltaic photo-thermal integrated circulation system can achieve greenhouse humidification and space heating under the conditions of night and winter through photo-thermal transfer in space and time. In addition, power self-supply and grid-connected power generation can be also achieved, and the photovoltaic photo-thermal integrated circulation system effectively reduced energy consumption and improves comprehensive utilization efficiency of solar energy.

Description

technical field [0001] The invention relates to a photovoltaic photothermal integrated circulation system used in greenhouses, belonging to the field of comprehensive application of solar photoelectricity and photothermal technology. Background technique [0002] With the transformation of traditional agriculture to modern agriculture in my country, the application of large-scale greenhouses has developed rapidly. However, the current energy utilization method is still dominated by grid electricity and fossil fuels (coal, oil, gas, etc.), which are expensive and cause environmental pollution due to waste emissions. With the improvement of people's awareness of energy conservation and environmental protection, creating a new green and ecological agricultural model through the use of clean energy has become a trend that people respect. [0003] As an important primary energy and renewable energy, solar energy is rich in resources, inexhaustible, inexhaustible, without transpo...

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Problems solved by technology

[0004] However, the operation mode of the PVT system used above is relatively single, and it is impossible to switch between seasonal operation modes, resulting in low efficiency of comprehensive utilization of light and heat; in addition, under extreme weather conditions, it is difficult to ensure constant temperature and humidity conditions in the greenhouse

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