A photovoltaic photothermal integrated device that can avoid disadvantages

Abstract

The invention belongs to the field of photovoltaic and photo-thermal utilization and in particular relates to a photovoltaic and photo-thermal integrated device capable of drawing on advantages and avoiding disadvantages. The photovoltaic and photo-thermal integrated device capable of drawing on advantages and avoiding disadvantages comprises a glass cover plate (1), a photovoltaic power generation module (2), a side frame (3), a heat collecting plate (4), a liquid separating tube (5), heat exchange tubes (6), a gas collecting tube (7), blind fins (8), a transmission shaft (9), a blind connecting rod (10) and a reducing motor (11). The blind fins (8) can rotate to corresponding positions as needed to take away or utilize heat generated by solar energy and photovoltaic power generation quickly to play a role of enhancing heat transfer or insulating. The photo-thermal can be also improved while the photovoltaic power generation efficiency is improved, and photovoltaic and photo-thermal integration is achieved.

Description

technical field [0001] The invention belongs to the field of photovoltaic photothermal utilization, and in particular relates to a photovoltaic photothermal integrated device that can avoid disadvantages. Background technique [0002] Solar photovoltaic power generation is a power generation technology that has developed rapidly and is widely used in recent years. Theoretical research shows that about 80% of the solar energy irradiated on the surface of the battery panel is not converted into electrical energy, and a large part of the energy will be converted into heat energy. , radiated out in the form of electromagnetic waves, causing the temperature of the photovoltaic panel to rise. The increase in the temperature of photovoltaic cells will reduce the power generation efficiency. Generally, the power generation efficiency will drop by about 0.3% for every 1°C rise in the solar panel. Therefore, if the heat generated by solar energy can be quickly taken away and utilized,...

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Problems solved by technology

[0003] The existing photovoltaic photothermal integration technology basically adds an insulation board on the back of the photovoltaic power generation module, and a heat exchange medium is used between the insulation board and the photovoltaic power generation module to take away the heat generated by solar energy in photovoltaic power generation for heating or cooling. Taking domestic hot water, due to the insulation effect of the insulation board, can greatly reduce the heat transfer loss from the heat transfer medium to the outside air, and greatly increase the temperature of the heat transfer medium. However, for heating, light and heat can only be used in winter. When there is no need for heating in the season, the heat in the photovoltaic panels cannot be taken away due to the isolation of the photovoltaic panels from the outside air, resulting in an increase in the temperature of the photovoltaic panels. In summer, solar energy is sufficient, and the heat produced is greater than the heat used, and the temperature of the photovoltaic panel will still be too high. Therefore, the existing photovoltaic-thermal integration technology can only improve the photovoltaic and solar-thermal efficiency at the same time when it is used in a place with a heat load throughout the year. , which is bound to greatly reduce the scope of application of photovoltaic photothermal integration technology, so it is necessary to improve the existing technology to expand its application scope

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