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Solar spectral beam splitting for photochemical conversion and polygeneration
Year:
2022
Source of publication :
Energy Conversion and Management
Authors :
Vitoshkin, Helena
;
.
Volume :
258
Co-Authors:

Gur Mittelman
Abraham Kribus
Michael Epstein
Beni Lew
Shahaf Baron
Yuri Flitsanov
Helena Vitoshkin

Facilitators :
From page:
0
To page:
0
(
Total pages:
1
)
Abstract:

Conversion efficiency from sunlight to electricity is relatively low for both solar thermal and photovoltaic converters, where more than three quarters of the solar energy is dissipated back to the environment. Division of the solar spectrum (spectral splitting) enables better use of photon energy in each spectral band. Here we present a polygeneration approach to solar energy conversion where the main contribution is a photochemical process, while co-producing power and medium grade heat. A collector design is introduced with a linear Fresnel lens, a ‘cold mirror’ spectral filter, and photochemical, photovoltaic, and thermal converters. To illustrate a wide scope of applications, three photochemical options are investigated: photonitrozation of cyclohexane, photooxigenation of citronellol, and catalytic disinfection of wastewater. The analysis of conversion efficiency uses detailed optical modeling based on realistic (commercially available) component properties and on experimental characterization of participating compounds. Overall system efficiency is up to 50%. The amount of electricity displaced or saved vs. current lamp-driven photochemical processes can reach as high as 97% of the incident solar energy, for several combinations of photochemical and photovoltaic converters. The polygeneration approach can be implemented using low-cost components and may lead to cost-effective, highly efficient solutions with a significant contribution to displacement of conventional energy sources.

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More details
DOI :
10.1016/j.enconman.2022.115525
Article number:
115525
Affiliations:
Database:
Scopus
Publication Type:
article
;
.
Language:
English
Editors' remarks:
ID:
58559
Last updated date:
11/04/2022 18:13
Creation date:
11/04/2022 18:07
Scientific Publication
Solar spectral beam splitting for photochemical conversion and polygeneration
258

Gur Mittelman
Abraham Kribus
Michael Epstein
Beni Lew
Shahaf Baron
Yuri Flitsanov
Helena Vitoshkin

Solar spectral beam splitting for photochemical conversion and polygeneration

Conversion efficiency from sunlight to electricity is relatively low for both solar thermal and photovoltaic converters, where more than three quarters of the solar energy is dissipated back to the environment. Division of the solar spectrum (spectral splitting) enables better use of photon energy in each spectral band. Here we present a polygeneration approach to solar energy conversion where the main contribution is a photochemical process, while co-producing power and medium grade heat. A collector design is introduced with a linear Fresnel lens, a ‘cold mirror’ spectral filter, and photochemical, photovoltaic, and thermal converters. To illustrate a wide scope of applications, three photochemical options are investigated: photonitrozation of cyclohexane, photooxigenation of citronellol, and catalytic disinfection of wastewater. The analysis of conversion efficiency uses detailed optical modeling based on realistic (commercially available) component properties and on experimental characterization of participating compounds. Overall system efficiency is up to 50%. The amount of electricity displaced or saved vs. current lamp-driven photochemical processes can reach as high as 97% of the incident solar energy, for several combinations of photochemical and photovoltaic converters. The polygeneration approach can be implemented using low-cost components and may lead to cost-effective, highly efficient solutions with a significant contribution to displacement of conventional energy sources.

Scientific Publication
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