Efficient wave length light-splitting type solar energy comprehensive utilization system

Abstract

The invention provides an efficient wave length light-splitting type solar energy comprehensive utilization system. The efficient wave length light-splitting type solar energy comprehensive utilization system is characterized by comprising wave length light-splitting devices, a small included angle light-condensation device and a combined receiving device, wherein the small included angle light-condensation device is arranged the front stage of the wave length light-splitting devices in a light path, the combined receiving device is arranged at the back stage of the wave length light-splitting devices and composed of two or more kinds of receivers, the convergence included angle of light rays entering each wave length light-splitting device from the small included angle light-condensation device is smaller than or equal to 90 degrees, and the convergence included angle is further optimized to be smaller to or equal to 60 degrees. By utilizing the characteristic that the different receivers respond to different solar spectrums, the efficient wave length light-splitting type solar energy comprehensive utilization system efficiently utilizes sunlight, carries out photovoltaic power generation by utilizing the fact that certain varieties of photovoltaic cells can efficiently respond to radiation of partial frequency bands of sunlight, and meanwhile utilizes the radiation of rest frequency bands of sunlight to carry out optothermal power generation, thereby achieving economical, efficient and comprehensive utilization of the solar energy in the full-band range. Besides, temperature rise of the photovoltaic cells caused by radiation in a non-response or low-efficiency response range can be avoided, and economical, efficient and comprehensive utilization in the entire solar radiation range is guaranteed.

Description

technical field [0001] The invention relates to the technical field of solar energy utilization, in particular to a wavelength-splitting high-efficiency solar energy comprehensive utilization system. Background technique [0002] The current utilization of solar energy, one is photoelectric conversion, which converts solar radiant light into electrical energy through solar cells; the other is photothermal conversion, that is, using solar energy collection devices to convert solar radiation energy into thermal energy, such as solar thermal power generation and solar water heaters. However, photoelectric and photothermal systems are mostly independent. [0003] At present, photovoltaic cells mainly include monocrystalline silicon, polycrystalline silicon, amorphous silicon, cadmium antimonide, gallium arsenide, etc. Each photovoltaic cell has a different spectral response curve to sunlight, and the peak value of the quantum efficiency spectral curve of different photovoltaic ...

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Problems solved by technology

[0004] The purpose of the present invention is to overcome the problem of low efficiency of photovoltaic power generation due to the low efficiency of photovoltaic cells in some wavelength bands in utilizing solar spectrum, and to provide a system for more effective utilization of solar spectrum and high-efficiency comprehensive power generation

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