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System and method for jointly producing energy by means of solar photocatalysis and medium and low-temperature thermal chemistry by aid of spectrum frequency division

A technology of low-temperature heat and solar energy, applied in the field of full-spectrum solar energy, can solve problems such as low conversion efficiency of solar energy and energy waste, and achieve the effects of improving conversion efficiency, saving energy, and efficient utilization

Inactive Publication Date: 2017-12-01
HARBIN INST OF TECH AT WEIHAI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, photocatalytic materials mainly use ultraviolet light, and great progress has been made in visible light-responsive photocatalytic materials, but ultraviolet light (<400nm) only accounts for 4% of solar radiation energy, and visible light (400nm~750nm) accounts for 43% of solar radiation energy. %, the unused infrared light causes a waste of energy, making the conversion efficiency of solar energy lower

Method used

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  • System and method for jointly producing energy by means of solar photocatalysis and medium and low-temperature thermal chemistry by aid of spectrum frequency division
  • System and method for jointly producing energy by means of solar photocatalysis and medium and low-temperature thermal chemistry by aid of spectrum frequency division

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Embodiment 1

[0020] Example 1: Combining figure 1 and figure 2 To illustrate, a combined production system of solar photocatalysis and medium and low temperature thermochemistry is realized through spectral frequency division, and a combined production system of solar photocatalysis and medium and low temperature thermochemistry is realized through spectral frequency division, including trough reflector 1, spectral analysis Frequency divider 2, medium and low temperature thermochemical reaction device 3, solar photocatalysis device 4 and low temperature heat exchanger 7; Spectral frequency divider 2 is arranged directly above the trough reflector 1; Spectral frequency divider 2 pairs different spectra Solar energy is redistributed, and the solar spectrum is separated at a wavelength of 750nm, so that the sunlight with a wavelength of less than 750nm is sent to the solar photocatalytic device 4 to produce hydrogen, and the sunlight with a wavelength of more than 750nm is sent to the low-te...

Embodiment 2

[0021] Example 2: Combining figure 1 and figure 2 To illustrate, this embodiment provides a method for realizing combined production capacity of solar photocatalysis and medium-low temperature thermochemistry through spectral frequency division, which is realized by relying on the system described in Example 1; the specific steps of the method are:

[0022] Sunlight is irradiated on the trough mirror 1 and reflected and focused, and the spectrum divider 2 is used to redistribute the concentrated solar energy of different spectra, and the sunlight in the photocatalytic spectral response band in the solar spectrum is transported to the solar photocatalytic device In 4, the photocatalytic spectral response band is less than 750nm; the sunlight that cannot be used by photocatalysis in the solar spectrum is transported to the low-temperature heat exchanger 7 and the medium-low temperature thermochemical reaction device 3 to provide the energy required for the endothermic reaction....

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Abstract

The invention discloses a system and a method for jointly producing energy by means of solar photocatalysis and medium and low-temperature thermal chemistry by the aid of spectrum frequency division, and belongs to the technical field of solar full spectra. The technical scheme mainly includes that a spectrum frequency divider is arranged right above a groove type reflecting mirror; solar energy with different spectra can be redistributed by the spectrum frequency divider, the solar spectra can be separated from one another at the wavelengths of 750 nm, sunlight with the wavelengths shorter than 750 nm is transmitted into a solar photocatalysis device for preparing hydrogen, sunlight with the wavelengths longer than 750 nm is transmitted to a low-temperature heat exchanger and a medium and low-temperature thermal chemical reaction device to provide heat energy required by heat absorption reaction, and the low-temperature heat exchanger and the medium and low-temperature thermal chemical reaction device are communicated with each other via pipelines to form circuits. The system and the method have the advantages that photocatalysis-medium and low-temperature thermal chemistry are jointly used, and accordingly waste heat can be recycled; each solar spectrum can be divided into two portions by the aid of spectrum frequency division technologies, accordingly, the hydrogen can be prepared by means of solar photocatalysis, the medium and low-temperature thermal chemistry can be efficiently utilized, energy can be saved, and the solar conversion efficiency can be improved.

Description

technical field [0001] The invention relates to a solar photocatalysis and medium-low temperature thermochemical combined production system and method, in particular to a solar photocatalytic and medium-low temperature thermochemical combined production system and method through spectrum frequency division, which belongs to the technical field of solar energy full spectrum. Background technique [0002] Energy is the material basis for human survival and social development. However, the depletion of energy and serious environmental pollution have become urgent problems for scholars at home and abroad. As a clean and renewable energy source, solar energy has become an important part of human energy use and has been continuously developed under the condition of decreasing fossil fuels. To address global energy shortages, environmental pollution and other issues, using solar energy to produce chemical fuels is a sustainable solution. Hydrogen has become the most promising new ...

Claims

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Application Information

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IPC IPC(8): C01B3/32F24J2/00H01M8/0612
CPCC01B3/32C01B2203/0227F24S21/00H01M8/0618Y02E10/40Y02E60/50Y02P20/10Y02P20/129Y02P20/133
Inventor 王富强程子明梁华旭谭建宇
Owner HARBIN INST OF TECH AT WEIHAI
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