Cold accumulation cooling-down type solar battery component

Abstract

The invention discloses a cool storage temperature reduction type solar module aiming at providing a photovoltaic generating equipment which makes use of a natural temperature differential source to reduce working temperature of a solar cell and whose solar conversion efficiency is higher than that of common solar module; the cool storage temperature reduction type solar module comprises a solar cell packaging module, a cooling medium container which takes the packaging module as an upper closed surface, a cooling medium contained in the cooling medium container, an attemperator which can automatically open and close and surrounds the cooling medium container. The cool storage temperature reduction type solar module of the invention automatically opens the attemperator in the night so thatthe cooling medium and nighttime atmosphere exchange heat to reduce temperature close to daily minimum temperature of atmosphere, and closes the attemperator in daytime and reduces heat exchange withoutside so that a natural temperature differential cooling capacity stored by the cooling medium is effectively used for reducing temperature of the solar cell, and can mostly cause the actual solarconversion efficiency of the solar cell to increase more than 10% according to the field experimentation result.

Description

technical field [0001] The present invention relates to a solar photovoltaic power generation device, more specifically, the present invention provides a cooling-storage and cooling-type solar cell that uses natural temperature difference energy to reduce the operating temperature of the solar cell, and the conversion efficiency of solar energy is higher than that of conventional solar cell components during actual operation. components. Background technique [0002] The efficiency with which a solar cell converts solar energy into electricity is related to its operating temperature. The efficiency of crystalline silicon solar cells, which accounts for more than 90% of the photovoltaic market share, decreases with the increase of operating temperature at a rate of -0.4 to -0.6% / °C, so the higher the operating temperature of the solar cell, the lower the efficiency. At present, solar cells can only convert less than 20% of solar energy into electrical energy, and more than 8...

AI Technical Summary

Problems solved by technology

This cooling method has a positive effect on reducing the operating temperature of the solar cell. However, if a water pump is installed to promote the water to circulate mechanically, the power consumed by the pump may offset the improvement in the efficiency of the solar cell. If no water pump is used to rely on natural circulation, the circulation flow rate depends Flow resistance, the narrower the flow channel, the greater the resistance, and the smaller the flow, resulting in a larger temperature difference, that is, the operating temperature of the solar cell is still high

In addition, three related patents: Chinese open patent CN1716642, open date 2006.01.04, invention name hybrid photoelectric light thermal collector, Chinese open patent CN1563844, open date 2005.01.12, invention name solar electric heating cogeneration device, Chinese open patent CN1988183 , Publication date 2007.06.27, the name of the invention is a solar cell electrothermal device. The devices proposed in these patents also use the heat of cooling water while cooling the solar cell. From the purpose of the patent to the technical solution adopted, they do not make the solar cell work. The temperature has dropped significantly

From the perspective of improving the conversion efficiency of solar cells, the existing cooling technologies are limited to a certain extent.

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