Photovoltaic photo-thermal energy storage device

Abstract

The invention discloses a photovoltaic photo-thermal energy storage device, which comprises a photovoltaic cell, an upper conduction plate, a lower conduction plate, a phase change heat storage material and a channel pipe, wherein the upper conduction plate is arranged on the back of the photovoltaic cell; the lower conduction plate is arranged below the upper conduction plate; the channel pipe is arranged between the upper conduction plate and the lower conduction plate; a cyclic medium is arranged in the channel pipe; and the phase change heat storage material is arranged out of the channel pipe and is filled between the upper conduction plate and the lower conduction plate. According to the photovoltaic photo-thermal energy storage device, the total use ratio of the solar energy is above 70%, the photovoltaic conversion efficiency is improved by above 15%, and the energy efficiency ratio of a heat pump system is above 3.0; solar energy photovoltaic utilization, photo-thermal utilization and the heat pump system are integral, the integral structure is compact, and a unit is minimized; and electric energy output provided by the photovoltaic cell can satisfy the requirements for the heat pump system to operate.

Description

technical field [0001] The invention relates to an energy storage device, in particular to a photovoltaic photothermal energy storage device. Background technique [0002] In the practical application of photovoltaic cells, more than 80% of the solar energy irradiated on the surface of photovoltaic cells is not converted into electrical energy, but into heat energy, which makes the temperature of photovoltaic cells rise, especially when the solar radiation is strong, which will cause photovoltaic The battery efficiency drops sharply, and the conversion efficiency of photovoltaic cells is usually only 8% to 12%. [0003] At present, the thermal energy generated by the solar energy irradiated on the surface of the photovoltaic cell is not stored, which leads to energy loss on the one hand and low conversion efficiency of the photovoltaic cell on the other hand. How to better store the light and heat generated by solar energy under the premise of satisfying the normal power su...

AI Technical Summary

Problems solved by technology

[0002] In the practical application of photovoltaic cells, more than 80% of the solar energy irradiated on the surface of photovoltaic cells is not converted into electrical energy, but into heat energy, which makes the temperature of photovoltaic cells rise, especially when the solar radiation is strong, which will cause photovoltaic The efficiency of the battery drops sharply, and the conversion efficiency of photovoltaic cells is usually only 8% to 12%.

[0003] At present, the heat energy generated by the solar energy irradiated on the surface of the photovoltaic cell is not stored, which leads to the loss of energy on the one hand, and lowers the conversion efficiency of the photovoltaic cell on the other hand.

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