blackbody cavity
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2020 ◽  
Vol 10 (1) ◽  
Author(s):  
Yanpei Tian ◽  
Xiaojie Liu ◽  
Alok Ghanekar ◽  
Fangqi Chen ◽  
Andrew Caratenuto ◽  
...  

AbstractSpectrally selective solar absorbers (SSAs), which harvest heat from sunlight, are the key to concentrated solar thermal systems. An ideal SSA must have an absorptivity of unity in the solar irradiance wavelength region (0.3–2.5 $$\upmu $$ μ m), and its infrared thermal emissivity must be zero to depress spontaneous blackbody irradiation (2.5–25 $$\upmu $$ μ m). Current SSA designs which utilize photonic crystals, metamaterials, or cermets are either cost-inefficient due to the complexity of the required nanofabrication methods, or have limited applicability due to poor thermal stability at high temperatures. We conceptually present blackbody-cavity solar absorber designs with nearly ideal spectrally selective properties, capable of being manufactured at scale. The theoretical analyses show that the unity solar absorptivity of the blackbody cavity and nearly zero infrared emissivity of the SSA’s outer surface allow for a stagnation temperature of 880 $$^\circ $$ ∘ C under 10 suns. The performance surpasses state-of-the-art SSAs manufactured using nanofabrication methods. This design relies only on traditional fabrication methods, such as machining, casting, and polishing. This makes it suitable for large-scale industrial applications, and the “blackbody cavity” feature enables easy integration with existing concentrated solar thermal systems using the parabolic reflector and Fresnel lens as optical concentrators.


2020 ◽  
Vol 28 (16) ◽  
pp. 23294
Author(s):  
Jian Song ◽  
Xiaopeng Hao ◽  
Zundong Yuan ◽  
Lei Ding

Instrumentasi ◽  
2020 ◽  
Vol 44 (1) ◽  
pp. 33
Author(s):  
Iip Ahmad Rifai ◽  
Aditya Achmadi ◽  
Dwi Larassati ◽  
Rahman Sholeh ◽  
Melati Azizka Fajria ◽  
...  
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Author(s):  
Bo Liu ◽  
Chong-yuan Wang ◽  
Jun-long Xu ◽  
Zhi-yuan Wang ◽  
Peng-fei Zhu

2020 ◽  
Vol 49 (9) ◽  
pp. 906001-906001
Author(s):  
宋超鑫 Chao-xin SONG ◽  
雷小华 Xiao-hua LEI ◽  
谢磊 Lei XIE ◽  
刘显明 Xian-ming LIU ◽  
陈伟民 Wei-min CHEN

2019 ◽  
Vol 58 (7) ◽  
pp. 1707
Author(s):  
Xiaohua Lei ◽  
Lei Xie ◽  
Lianshan Qi ◽  
Weimin Chen

2019 ◽  
Vol 301 ◽  
pp. 00022 ◽  
Author(s):  
Jiangfeng Cheng ◽  
Chia-Feng Juang ◽  
Weihai Chen ◽  
Guohui Mei

The blackbody cavity sensor for continuous temperature measurement of molten steel has been widely used in steel industry. However, due to the closed bottom of the inner tube, the temperature measurement accuracy is seriously affected. It’s urgent to redesign and improve the sensor, which involves multidisciplinary knowledge, including materials, heat and flow science. This paper first clarifies the relationship between sensor functional requirements and various physical structure parameters from the perspective of axiomatic design. On this basis, the virtual models of the blackbody cavity sensor are established, including geometry model, multi-physical field model, material physical properties and boundary conditions. And then through comparison between experiment and simulation, it is found that for the temperature measurement accuracy, the deviations between the simulation and the actual experimental result are less than 1.5℃. This verifies the accuracy of the virtual model.


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