Device based on nanofluid and Fresnel concentrating photovoltaic heat

Abstract

The present invention discloses a novel device based on nanofluid and Fresnel concentrating photovoltaic heat. The device comprises a solar photovoltaic thermal CPV / T device array, a Fresnel condenser, a system nanofluid cooling working medium outlet, horizontal and vertical fixed shafts, a system nanofluid cooling working medium inlet, a horizontal row fixed array, a vertical row fixed array, a unit photovoltaic thermal device cooling working medium circulation outlet, a unit photovoltaic thermal device cooling working medium circulation inlet, and a nanofluid transportation pipeline. According to the device, the coupling of a solar photovoltaic systems and a solar thermal system is realized, the large area Fresnel condenser is used to concentrate sun radiation to solar photovoltaic thermal CPV / T devices, the frequency dividing absorbing radiation characteristic and efficient heat conduction characteristic of nanofluid are utilized, solar infrared light radiation is adsorbed at an upper layer flow channel, and PV modules are cooled. The light and heat conversion efficiency of solar energy is improved, the PV modules are cooled, high photoelectric conversion efficiency is maintained, and thus the comprehensive utilization of the solar energy is improved.

Description

technical field [0001] The invention relates to a photovoltaic thermal device based on nanofluid and Fresnel concentrator, which belongs to the technical field of solar photovoltaic thermal technology. Background technique [0002] Facing the rapid depletion of fossil fuel energy and the increasingly prominent environmental problems, the effective use of solar energy and the development of related technologies to improve overall efficiency will help alleviate global energy problems, improve air quality, slow down the greenhouse effect and achieve sustainable development. are of great significance. [0003] At present, the development and utilization of solar energy is mainly a single photovoltaic module to achieve photoelectric conversion, converting solar energy into electrical energy, and the conversion efficiency is generally 17%. ~ 25%; the utilization of light and heat is mainly a single light-to-heat conversion, which directly converts solar energy into thermal energy...

AI Technical Summary

Problems solved by technology

[0005] At present, there are many deficiencies in solar panels. First, the photoelectric conversion efficiency of solar panels is low and is easily affected by the ambient temperature.

Second, solar panels are not easy to maintain, easy to accumulate dust and reduce conversion efficiency in the use of solar power plant systems

Third, the temperature of the solar cell is too high, if it does not exceed one degree, the photoelectric conversion efficiency will decrease by about 0.4%, and the influence of temperature is more obvious

Fourth, the grade of heat source formed by single solar photothermal conversion is low

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