Loghman Rezaei; Samrand Saeidi; András Sápi; M.R. Abdollahi Senoukesh; Gyula Gróf; Wei‐Hsin Chen; Zoltán Kónya; Jiří Jaromír Klemeš · 10.1016/j.jclepro.2023.137692 https://doi.org/10.1016/j.jclepro.2023.137692
Journal of Cleaner Production
Efficiency improvement of the solar chimneys by insertion of hanging metallic tubes in the collector: Experiment and computational fluid dynamics simulation Loghman Rezaei; Samrand Saeidi; Andras Sapi; M.R. Abdollahi Senoukesh; Gyula Grof; Wei‐Hsin Chen; Zoltan Konya; Jiri Jaromir Klemes The solar chimney power plant (SCPP) is a straightforward and clean technique to generate electricity from solar radiation. However, this technology still faces major challenges, such as low efficiency, which has hindered its industrialization. This study experimentally develops a novel collector design to improve the solar chimney collector's efficiency. The new design includes metallic tubes as solar radiation absorbers hung from the canopy of the collector. The metallic tubes are open at the top and sealed with transparent sheets at the bottom to decrease the solar radiation reflected into the ambient air. Experimental and 3-D computational fluid dynamics (CFD) analyses are performed to validate the new design. The effects of hanging metallic tubes on temperature and velocity distribution are explored. The temperature increased by about 5 K at the chimney inlet, causing a roughly 8% rise in collector efficiency due to the fact that metallic tubes operate as an extended surface. The impact of various tube geometries on solar chimneys' efficiency is examined. The CFD findings reveal that the metallic tube geometry variation has considerably impacted the collector's efficiency. Thus, the collector efficiency is increased by changing tube diameter by around 33.7%, similar to changing tube length by 30%.
Experimental
Numerical / CFD
Solar chimney power plant
2023
Journal of Cleaner Production
yes
2023-06-12 12:00:00 00002228
efficiency improvement of the solar chimneys by insertion of hanging metallic tubes in the collector: experiment and computational fluid dynamics simulation
2023
Journal of Cleaner Production
Loghman Rezaei; Samrand Saeidi; András Sápi; M.R. Abdollahi Senoukesh; Gyula Gróf; Wei‐Hsin Chen; Zoltán Kónya; Jiří Jaromír Klemeš
10.1016/j.jclepro.2023.137692
Abstract
The solar chimney power plant (SCPP) is a straightforward and clean technique to generate electricity from solar radiation. However, this technology still faces major challenges, such as low efficiency, which has hindered its industrialization. This study experimentally develops a novel collector design to improve the solar chimney collector's efficiency. The new design includes metallic tubes as solar radiation absorbers hung from the canopy of the collector. The metallic tubes are open at the top and sealed with transparent sheets at the bottom to decrease the solar radiation reflected into the ambient air. Experimental and 3-D computational fluid dynamics (CFD) analyses are performed to validate the new design. The effects of hanging metallic tubes on temperature and velocity distribution are explored. The temperature increased by about 5 K at the chimney inlet, causing a roughly 8% rise in collector efficiency due to the fact that metallic tubes operate as an extended surface. The impact of various tube geometries on solar chimneys' efficiency is examined. The CFD findings reveal that the metallic tube geometry variation has considerably impacted the collector's efficiency. Thus, the collector efficiency is increased by changing tube diameter by around 33.7%, similar to changing tube length by 30%.
Abstract by the authors, reproduced under the CC BY-NC-ND 4.0 licence. Original publication via the link below.
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