1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta GA 30332, USA 2. George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta GA 30332, USA 3. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Spectral emittance measurements of micro/nanostructures in energy conversion: a review
Shiquan SHAN1, Chuyang CHEN2, Peter G. LOUTZENHISER2, Devesh RANJAN2, Zhijun ZHOU3(), Zhuomin M. ZHANG2()
1. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China; George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta GA 30332, USA 2. George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology, Atlanta GA 30332, USA 3. State Key Laboratory of Clean Energy Utilization, Zhejiang University, Hangzhou 310027, China
Micro/nanostructures play a key role in tuning the radiative properties of materials and have been applied to high-temperature energy conversion systems for improved performance. Among the various radiative properties, spectral emittance is of integral importance for the design and analysis of materials that function as radiative absorbers or emitters. This paper presents an overview of the spectral emittance measurement techniques using both the direct and indirect methods. Besides, several micro/nanostructures are also introduced, and a special emphasis is placed on the emissometers developed for characterizing engineered micro/nanostructures in high-temperature applications (e.g., solar energy conversion and thermophotovoltaic devices). In addition, both experimental facilities and measured results for different materials are summarized. Furthermore, future prospects in developing instrumentation and micro/nanostructured surfaces for practical applications are also outlined. This paper provides a comprehensive source of information for the application of micro/nanostructures in high-temperature energy conversion engineering.
通讯作者:
ZHOU Zhijun,ZHANG(张卓敏) Zhuomin M.
E-mail: zhouzj@zju.edu.cn;zhuomin.zhang@me.gatech.edu
Corresponding Author(s):
Zhijun ZHOU,Zhuomin M. ZHANG
引用本文:
SHAN Shiquan, CHEN Chuyang, LOUTZENHISER Peter G., RANJAN Devesh, ZHOU Zhijun, ZHANG(张卓敏) Zhuomin M.. 能量转换中微/纳米结构的光谱发射率测量技术综述[J]. Frontiers in Energy, 2020, 14(3): 482-509.
Shiquan SHAN, Chuyang CHEN, Peter G. LOUTZENHISER, Devesh RANJAN, Zhijun ZHOU, Zhuomin M. ZHANG. Spectral emittance measurements of micro/nanostructures in energy conversion: a review. Front. Energy, 2020, 14(3): 482-509.
Nanjing University of Science and Technology (China)
[44]
Monochromator (photon detector)
2–15
473 to 1003
Directional (N/A)
Electrical coil heater
National Institute of Metrology (China)
[51]
Spectroradiometer
0.6–40
1300 to 2500
Directional (0° to 80°)
Solar furnace
PROMES-CNRS (France)
[52]
FTIR
8–14
173 to 213
Normal
Refrigerator (cooling)
Chinese Academy of Sciences (China)
[53]
FTIR
1.4–26
550 to 1250
Normal
Laser heating
University of West Bohemia (Czech Republic)
[54,55]
FTIR
5–25
325 to 405
Normal
Solar-like halogen lamp
Brown University (USA)
[56]
FTIR
2–9
Up to 973
Normal
Electrical heater
University of Wisconsin-Madison (USA)
[57]
FTIR
0.7–29
773 to 1273
Normal
Blackbody radiator
Ruhr-University Bochum (Germany)
[58,59]
FTIR
0.8–8
1000 to 1700
Normal
Oxygen-gas flame
Tohoku University (Japan)
[63,64]
FTIR
1.5–20
Up to 2226
Normal
Oxy/acetylene torch
Advanced Fuel Research Inc. (USA)
[67]
FTIR
5–12
253 to 373
Normal
Circulating fluid
National Research Laboratory of Metrology (Japan)
[68]
FTIR
1.6–22
373 to 1673
Normal
Tantalum wire heater
Tokai University (Japan)
[69]
FTIR
2.5–25
323 to 773
Directional (0° to 50°)
Electrical heater
Korea Research Institute of Standards and Science (South Korea)
[70]
FTIR
0.6–15
773 to 1623
Normal
Electrical heater
Bundeswehr University of Munich (Germany)
[71]
FTIR
1–25
373 to 1473
Normal
Electrical heater
University of Duisburg-Essen (Germany)
[72]
Tab.1
Fig.7
Fig.8
Fig.9
Fig.10
Fig.11
Fig.12
Structure
Materials
Method and instrument
Directionality
Wavelength/μm
Temperature/K
Solar absorptance
Thermal emittance*
References
Multilayer
TiAlNx/TiAlNy/Al2O3
Indirect (spectrophotometer and FTIR)
Near-normal (8° or 10°)
0.25–25
298 to 823
0.93
0.22 (823 K)
[76]
Multilayer(cermet)
SiO2/20%Mo:SiO2/ 50%Mo:SiO2/Ag
Direct (high accurate radiometer)
Normal
1.5–25
423 to 873
0.9
0.02 (298 K)
[90]
Multilayer (cermet)
Si3N4/20%Mo:Si3N4/ 37%Mo:Si3N4/Ag
Direct (high accurate radiometer)
Normal
1.5–25
523 to 873
–
0.15 (300 K)
[91]
Multilayer
W/WAlN/WAlON/Al2O3
Direct (high accurate radiometer)
Directional (10° to 90°)
2–25
290 to 773
0.958
0.08 (355 K)
[92]
Multilayer
TiAlC/TiAlCN/TiAlSiC/ TiAlSiCO/TiAlSiO
Indirect (spectrophotometer and FTIR)
Near-normal (8° or 10°)
0.25–25
353 to 773
0.96
0.15 (773 K)
[93]
Multilayer
Ti/SiO2 cascade optical cavities
Indirect (VIS/NIR spectrometer)
Near-normal
0.4–1.7
Room temperature
0.98
–
[94]
Multilayer
TiN/TiNO/ZrO2/SiO2
Indirect (spectrophotometer and FTIR)
Near-normal
0.3–15
Room temperature
0.922
0.17 (1000 K)
[95]
Metamaterial
Ti/MgF2/W
Indirect (FTIR)
Near-normal
0.4–20
298 to 623
0.9
0.2
[77]
Metamaterial
W/Al2O3/W
Indirect (spectrophotometer)
Near-normal
0.3–2.5
293 to 1473
0.83
–
[96]
PhC
HfO2 coated Ta 2D PhC
Indirect (FTIR)
Near-normal
0.3–3
Room temperature
0.86
0.26 (1000 K)
[99]
PhC
Al2O3 coated Ni nanopyramid array
Indirect (spectrophotometer and FTIR)
Near-normal
0.3–10
Room temperature
0.95
0.1 (298 K)
[100]
Gratings/microcavities
W cylindrical cavities or 2D pyramid gratings
Indirect (spectrophotometer and FTIR)
Near-normal
0.2–4.25
Room temperature
0.82 or 0.93
0.09 (800 K) or 0.17 (800 K)
[101]
Tab.2
Fig.13
Fig.14
Structure
Materials
Method and instrument
Directionality
Wavelength /μm
Temperature /K
Maximum normal emittance (wavelength location)
References
Periodic grating
Micro-grooved Si
Direct (spectrometer)
Directional (0° to 80°)
2–14
573 and 673
About 0.9 (3 μm)
[61]
Periodic grating
Tungsten 2D grating
Direct (FTIR)
Directional (0° and 30°)
1.0–5.0
1200
0.7 (1.6 μm)
[105]
Periodic grating
SiC 1D grating
Direct (FTIR)
Normal
9.5–13
773
0.9 (11.1 μm)
[106]
Microcavity
Pt-coated Si reverse-pyramid cavities
Direct (FTIR)
Normal
0.8–5
890
0.8 (1.6 μm)
[63]
Microcavity
Ti-coated Si rectangular cavities
Direct (spectrometer)
Normal
1–5
1073
0.8 (3.2 μm)
[65]
Microcavity
Ni rectangular cavities
Direct (spectrometer)
Normal
0.7–4
1000
0.95 (0.87 μm)
[66]
Microcavity
Cr-coated Si rectangular cavities
Direct (FTIR)
Directional (0° to 15°)
3–25
750
About 0.6 (6–10 μm)
[107]
Microcavity
W rectangular cavities
Direct (FTIR)
Normal
0.6–4
Up to 1400
0.8 (1.25 μm)
[108,109]
Microcavity
Perovskite-type manganese thermochromic materials
Indirect (FTIR)
Near-normal
1.25–25.5
173 to 373
0.95 (4 μm)
[111]
Microcavity
Ag-coated Si microcavities
Indirect (FTIR)
Near-normal
3.6–25
Room temperature
Near unity (8.87 μm, 5.63 μm, and 3.89 μm)
[112]
Microcavity
LSMO-coated silicon microcavity
Indirect (FTIR)
Near-normal
2.5–25
97 to 373
Near unity (6.5 μm)
[113]
Multilayer
Fabry-Perot cavity resonator
Direct (FTIR)
Directional (0° to 30°)
2–20
294, 600, and 800
About 0.8 (4.5 μm, 2.27 μm)
[25]
Metamaterial
Au-grating/SiO2/Au on Si substrate
Direct (FTIR)
Directional (0° to 30°)
3.33–10
700 and 750
0.8 (7.69 μm), 0.6 (4.17 μm)
[50]
Metamaterial
SiC metasurfaces (2D-grooved)
Indirect (FTIR+ microscope)
Near-normal
8–13
Room temperature
0.8 (12 μm)
[78]
Metamaterial
Pt-pattern/Al2O3/Pt on sapphire substrate
Indirect (FTIR+ microscope)
Near-normal
0.8–3.5
Room temperature
Near unity (1.5 μm)
[114]
1D PhC
SiO2/Si3N4 1D-PhC on Ag
Indirect (FTIR)
Directional (0°–80°)
0.85–1.1
Room temperature
0.6 (0.975 μm)
[117,118]
2D PhC
W cylindrical hole array
Indirect (FTIR)
Near-normal
1–3
Room temperature
Near unity (1.5 μm)
[87]
2D PhC
Ta cylindrical hole array
Indirect (FTIR)
Near-normal
1.4–3
Room temperature
Near unity (1.9 μm)
[88]
2D PhC
HfO2-coated Ta cylindrical hole array
Indirect (FTIR)
Near-normal
0.3–3
Room temperature
Near unity (1.9 μm)
[99]
2D PhC
Ta-W alloy cylindrical hole array
Indirect (FTIR)
Near-normal
1.4–3
Room temperature
Near unity (2 μm)
[115,116]
3D PhC
Ni woodpile structure
Direct (FTIR)
Normal
2–14
600, 700 and 800
0.65 (3 μm)
[120]
3D PhC
Pt-coated silicon scaffold
Direct (FTIR)
Directional (0° to 75°)
1.8–10.2
889 and 939
Near unity (2.5 μm)
[122]
Tab.3
Fig.15
Fig.16
Fig.17
Cf
Solar concentration factor
C1
First radiation constant
C2
Second radiation constant
E
Emissive power/(W?m−2)
Eλ
Spectral emissive power/(W?m−2?mm−1)
G0
Total solar irradiance/(W?m−2)
Gλ
Spectral solar irradiance/(W?m−2?mm−1)
I
Radiation intensity/(W?m−2?sr−1)
Iλ
Spectral intensity/(W?m−2?sr−1?mm−1)
T
Temperature/K
Greek symbols
α
Absorptance
ε
Emittance
η
Efficiency
θ
Zenith angle/(°)
Period of nanostructure/μm
λ
Wavelength/μm
ρ
Reflectance
σ
Stefen-Boltzmann constant
ψ
Azimuthal angle
Subscript
a
Absorber
b
Blackbody
θ
Directional
λ
Spectral
Abbreviation
CSP
Concentrating solar power
EQE
External quantum efficiency
FTIR
Fourier-transform infrared (spectrometer)
PhC
Photonic crystal
PV
Photovoltaic
TPV
Thermophotovoltaic(s)
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