TY - JOUR
T1 - Evaluation of the solar thermal storage of fluidized bed materials for hybrid solar thermo-chemical processes
AU - Seo, Su Been
AU - Ahn, Hyungwoong
AU - Go, Eun Sol
AU - Ling, Lih Jie Jester
AU - Siambun, Nancy Julius
AU - Park, Young-Kwon
AU - Lee, See Hoon
N1 - Funding Information:
This paper was supported by research funds from the National Research Foundation of Korea funded by the Ministry of Education, Science and Technology (NRF-2020R1I1A3A04037715) and the Institute of Information & communications Technology Promotion (IITP) grant funded by the Korean government (MSIT) (2021–0-02129).
Publisher Copyright:
© 2022, The Author(s), under exclusive licence to Springer-Verlag GmbH Germany, part of Springer Nature.
PY - 2022/3/29
Y1 - 2022/3/29
N2 - The use of solid particles as a solar energy transport and storage medium overcomes the intermittency issues for solar energy and is advantageous for the development of a hybrid process that integrates biomass and solar thermal energy. In this study, labscale experimental equipment consisted of bubbling fluidized bed (55mm I.D. and 200mm height) with direct irradiated solar thermal storage was designed and constructed. Sand, alumina (Al), and silica carbide (SiC) particles with 3 different particle sizes (130μm, 250μm, and 370μm) were used as a solar thermal storage medium in the fluidized bed. Due to higher absorption and emissivity properties, the solar thermal efficiency of SiC was higher than those of sand and Al. As the gas velocities in the bubbling fluidized bed increased from the initial minimum fluidization velocity (Umf) to 2 Umf, the temperature differences between upper bed and lower bed decreased from 470oC to 35oC because of vigorous solid mixing and heat transfer. Also, the increase of average particle size resulted in the decrease of solid heat storage and the increase of gas heat storage due to the differences of specific surface area and gas velocity. Therefore, the energy transported and stored according to the size of silicon carbide was the highest at 370 μm, and the receiver efficiency was 21.38%.
AB - The use of solid particles as a solar energy transport and storage medium overcomes the intermittency issues for solar energy and is advantageous for the development of a hybrid process that integrates biomass and solar thermal energy. In this study, labscale experimental equipment consisted of bubbling fluidized bed (55mm I.D. and 200mm height) with direct irradiated solar thermal storage was designed and constructed. Sand, alumina (Al), and silica carbide (SiC) particles with 3 different particle sizes (130μm, 250μm, and 370μm) were used as a solar thermal storage medium in the fluidized bed. Due to higher absorption and emissivity properties, the solar thermal efficiency of SiC was higher than those of sand and Al. As the gas velocities in the bubbling fluidized bed increased from the initial minimum fluidization velocity (Umf) to 2 Umf, the temperature differences between upper bed and lower bed decreased from 470oC to 35oC because of vigorous solid mixing and heat transfer. Also, the increase of average particle size resulted in the decrease of solid heat storage and the increase of gas heat storage due to the differences of specific surface area and gas velocity. Therefore, the energy transported and stored according to the size of silicon carbide was the highest at 370 μm, and the receiver efficiency was 21.38%.
U2 - 10.1007/s13399-022-02609-8
DO - 10.1007/s13399-022-02609-8
M3 - Article
SN - 2190-6815
JO - Biomass Conversion and Biorefinery
JF - Biomass Conversion and Biorefinery
ER -