Solar photovoltaic photo-thermal composite heat pipe vacuum tube

Abstract

The invention discloses a solar photovoltaic photo-thermal composite heat pipe vacuum tube, which comprises a glass tube, a photovoltaic assembly and a heat absorption plate. The heat absorption plate is a flat plate, the heat absorption plate and the concave end of a bent or curved surface steel plate are welded to form a heat pipe, a selective solar absorption coating A1-N / A1 is sprayed on the surface of the heat absorption plate where a copper plate is welded, and the other surface of the heat absorption plate and the photovoltaic assembly are connected tightly after being laminated through insulating transparent polymer ethylene vinyl acetate (EVA). The condensation end of the heat pipe is connected with one end of the glass tube in metal sealing mode, the other end of the glass tube is closed, and the position between the glass tube and the heat pipe is vacuumized. A working medium of the heat pipe selects a material with a boiling point ranging from 50 DEG C to 70 DEG C and a freezing point smaller than 0 DEG C. When hot water supply is surplus, the solar photovoltaic photo-thermal composite heat pipe vacuum tube can utilize photovoltaic batteries on the photovoltaic surface to generate electricity, then utilizes the heat pipe to cool the photovoltaic batteries to generate hot water; when the hot water supply is not enough, the photo-thermal surface of a heat collectingtube is turned over, optothermal is used for generating the hot water, and effective adjustment of photovoltaic power generation and the hot water can be achieved.

Description

technical field [0001] The invention relates to a solar photovoltaic photothermal composite heat pipe vacuum tube. Background technique [0002] As a renewable clean energy, solar energy has great potential for development and utilization. At present, the mature utilization methods of solar energy mainly include hot water utilization and photovoltaic power generation utilization; the utilization rate of solar hot water is relatively high, reaching about 60%-85%, while the efficiency of photovoltaic utilization is relatively low, only 6%-18% % is converted into electrical energy, more than 80% of the solar energy is lost in the form of heat energy, and for crystalline silicon photovoltaic cells, the power generation efficiency has a negative linear relationship with temperature. As the battery temperature increases, the power generation efficiency decreases. If we can combine photovoltaics with solar heat, give full play to the advantages of both, and recover most of the hea...

AI Technical Summary

Problems solved by technology

[0005] The announcement number is 201758374U, and its announcement date is March 9, 2011. It is a Chinese invention patent titled "An Integrated Solar Photovoltaic Photothermal Panel". Its technical solution is to combine photovoltaic modules with flat plate collectors. The glass is laminated and bonded, and the battery module is not in contact with the heat-absorbing plate. The cooling effect of the heat-absorbing plate on the module is poor, and due to the blocking of solar rays by the photovoltaic module, the direct incident sunlight on the heat-absorbing plate is also less , the photothermal effect is relatively poor

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