PVT system with air purification function and preparation method of photocatalyst TiO2 coating in system

Abstract

The invention discloses a PVT system with an air purification function and a preparation method of a photocatalyst TiO2 coating in the system. The PVT system comprises a transparent cover plate, an air flow channel arranged below the transparent cover plate, high-transmittance glass arranged below the air flow channel, multiple photovoltaic cells arranged below the high-transmittance glass, a backplate arranged below the photovoltaic cells, a thermal insulation layer arranged on the lower surface of the back plate, multiple row tubes arranged at the top of the thermal insulation layer and closely attached to the bottom surface of the back plate as well as a photocatalyst TiO2 coating arranged between the transparent cover plate and the air flow channel. Ultraviolet part in sunlight drivesa TiO2 photocatalytic oxidation reaction, a PVT module absorbs visible spectrum and near infrared spectrum to produce electric energy, and obtained heat energy is used for heating water and air. Besides, a PV module can be effectively protected against aging and the module life can be prolonged by filtering out ultraviolet.

Description

technical field [0001] The invention relates to the field of solar energy air purification, more specifically, relates to a PVT system with air purification function and a preparation method of a photocatalyst TiO2 coating in the system. Background technique [0002] Background 1: As we all know, for PV modules, ultraviolet light, visible light and near-infrared light in the solar spectrum are the main effective spectral parts. However, utilizing the full solar spectrum is difficult for PV modules. On the one hand, the PV module cannot utilize the far-infrared part of the solar spectrum, and the far-infrared spectrum will cause the temperature of the PV module to increase, resulting in a decrease in electrical efficiency. The PVT technology uses the energy of the far-infrared spectrum to heat the refrigerant water or air, thus effectively solving this problem. On the other hand, for crystalline silicon solar cells, under the irradiation of ultraviolet light, each photon ha...

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Problems solved by technology

[0004] However, the PVT system developed by the existing technology cannot have the functions of using sunlight for power generation, heating and air purification at the same time, and the utilization rate of the full sunlight spectrum is low.

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