Experimental investigation on spectral splitting of photovoltaic/thermal hybrid system with two-axis sun tracking based on SiO2/TiO2 interference thin film

Huaxu Liang; Han Han; Fuqiang Wang; Ziming Cheng; Bo Lin; Yuzhai Pan; Jianyu Tan

doi:10.1016/j.enconman.2019.03.060

Experimental investigation on spectral splitting of photovoltaic/thermal hybrid system with two-axis sun tracking based on SiO₂/TiO₂ interference thin film

Huaxu Liang
, Han Han
, Fuqiang Wang^*
, Ziming Cheng
, Bo Lin
, Yuzhai Pan
, Jianyu Tan

^*Corresponding author for this work

School of Energy Science and Engineering, Harbin Institute of Technology
School of New Energy, Harbin Institute of Technology Weihai
Automotive Engineering College
School of Science, Harbin Institute of Technology Weihai

Research output: Contribution to journal › Article › peer-review

83 Scopus citations

Abstract

In a “thermally decoupled” PV/T system, photovoltaic and thermal absorbers are allowed to operate at different temperatures to utilize full-spectrum sunlight. In this study, a two-axis tracking PV/T system with a SiO₂/TiO₂ interference thin film (irradiated by natural sunlight) was designed and fabricated initially. The SiO₂/TiO₂ interference thin film designed by the authors achieved a high average reflectance (R ≥ 96.8%) for PV bands, with a high average transmittance (T ≥ 85%) at 1100–2500 nm. The photoelectric, photothermal, and overall efficiencies were tested and analyzed theoretically using the first and second laws of thermodynamics. Outdoor testing indicated that PV cells with SiO₂/TiO₂ interference thin film can decrease by 3.0 K, and that the power generation and efficiency of the PV cells can be improved by 10% and 0.65%, respectively. The overall energy and exergy efficiency of the PV/T system based on SiO₂/TiO₂ interference thin film can reach 22.72% and 18.81%, i.e., 4.94% and 1.03% higher than those without a SiO₂/TiO₂ interference thin film, respectively. The calculated payback time was 17 years for this PV/T system.

Original language	English
Pages (from-to)	230-240
Number of pages	11
Journal	Energy Conversion and Management
Volume	188
DOIs	https://doi.org/10.1016/j.enconman.2019.03.060
State	Published - 15 May 2019
Externally published	Yes

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

Energy efficiency
Full spectrum
Optical splitting
PV/T system
Radiative transfer
Solar energy

Access to Document

10.1016/j.enconman.2019.03.060

Cite this

@article{6c7a554b928d489aa249683c090edbc7,

title = "Experimental investigation on spectral splitting of photovoltaic/thermal hybrid system with two-axis sun tracking based on SiO2/TiO2 interference thin film",

abstract = "In a “thermally decoupled” PV/T system, photovoltaic and thermal absorbers are allowed to operate at different temperatures to utilize full-spectrum sunlight. In this study, a two-axis tracking PV/T system with a SiO2/TiO2 interference thin film (irradiated by natural sunlight) was designed and fabricated initially. The SiO2/TiO2 interference thin film designed by the authors achieved a high average reflectance (R ≥ 96.8\%) for PV bands, with a high average transmittance (T ≥ 85\%) at 1100–2500 nm. The photoelectric, photothermal, and overall efficiencies were tested and analyzed theoretically using the first and second laws of thermodynamics. Outdoor testing indicated that PV cells with SiO2/TiO2 interference thin film can decrease by 3.0 K, and that the power generation and efficiency of the PV cells can be improved by 10\% and 0.65\%, respectively. The overall energy and exergy efficiency of the PV/T system based on SiO2/TiO2 interference thin film can reach 22.72\% and 18.81\%, i.e., 4.94\% and 1.03\% higher than those without a SiO2/TiO2 interference thin film, respectively. The calculated payback time was 17 years for this PV/T system.",

keywords = "Energy efficiency, Full spectrum, Optical splitting, PV/T system, Radiative transfer, Solar energy",

author = "Huaxu Liang and Han Han and Fuqiang Wang and Ziming Cheng and Bo Lin and Yuzhai Pan and Jianyu Tan",

note = "Publisher Copyright: {\textcopyright} 2019 Elsevier Ltd",

year = "2019",

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T1 - Experimental investigation on spectral splitting of photovoltaic/thermal hybrid system with two-axis sun tracking based on SiO2/TiO2 interference thin film

AU - Liang, Huaxu

AU - Han, Han

AU - Wang, Fuqiang

AU - Cheng, Ziming

AU - Lin, Bo

AU - Pan, Yuzhai

AU - Tan, Jianyu

PY - 2019/5/15

Y1 - 2019/5/15

N2 - In a “thermally decoupled” PV/T system, photovoltaic and thermal absorbers are allowed to operate at different temperatures to utilize full-spectrum sunlight. In this study, a two-axis tracking PV/T system with a SiO2/TiO2 interference thin film (irradiated by natural sunlight) was designed and fabricated initially. The SiO2/TiO2 interference thin film designed by the authors achieved a high average reflectance (R ≥ 96.8%) for PV bands, with a high average transmittance (T ≥ 85%) at 1100–2500 nm. The photoelectric, photothermal, and overall efficiencies were tested and analyzed theoretically using the first and second laws of thermodynamics. Outdoor testing indicated that PV cells with SiO2/TiO2 interference thin film can decrease by 3.0 K, and that the power generation and efficiency of the PV cells can be improved by 10% and 0.65%, respectively. The overall energy and exergy efficiency of the PV/T system based on SiO2/TiO2 interference thin film can reach 22.72% and 18.81%, i.e., 4.94% and 1.03% higher than those without a SiO2/TiO2 interference thin film, respectively. The calculated payback time was 17 years for this PV/T system.

AB - In a “thermally decoupled” PV/T system, photovoltaic and thermal absorbers are allowed to operate at different temperatures to utilize full-spectrum sunlight. In this study, a two-axis tracking PV/T system with a SiO2/TiO2 interference thin film (irradiated by natural sunlight) was designed and fabricated initially. The SiO2/TiO2 interference thin film designed by the authors achieved a high average reflectance (R ≥ 96.8%) for PV bands, with a high average transmittance (T ≥ 85%) at 1100–2500 nm. The photoelectric, photothermal, and overall efficiencies were tested and analyzed theoretically using the first and second laws of thermodynamics. Outdoor testing indicated that PV cells with SiO2/TiO2 interference thin film can decrease by 3.0 K, and that the power generation and efficiency of the PV cells can be improved by 10% and 0.65%, respectively. The overall energy and exergy efficiency of the PV/T system based on SiO2/TiO2 interference thin film can reach 22.72% and 18.81%, i.e., 4.94% and 1.03% higher than those without a SiO2/TiO2 interference thin film, respectively. The calculated payback time was 17 years for this PV/T system.

KW - Energy efficiency

KW - Full spectrum

KW - Optical splitting

KW - PV/T system

KW - Radiative transfer

KW - Solar energy

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