Experimental analysis of micro-cavity influence on the effective solar absorptance of white sand curtain on porous obstructions of particle heating receivers
The direct particle heating receiver (DPHR) represents a critical component within particle-based central receiver tower (CRT) systems, facilitating direct exposure of solid particles to concentrated solar irradiance. Among DPHRs, the obstructed flow particle heating receiver (OF-PHR) emerges as a n...
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Elsevier
2025-02-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25000292 |
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| author | Rageh Saeed Shaker Alaqel Eldwin Djajadiwinata Nader S. Saleh Abdulelah Alswaiyd Hany Al-Ansary Syed Noman Danish Abdelrahman El-Leathy Zeyad Al-Suhaibani Sheldon Jeter Redhwan Almuzaiqer Zeyad Almutairi |
| author_facet | Rageh Saeed Shaker Alaqel Eldwin Djajadiwinata Nader S. Saleh Abdulelah Alswaiyd Hany Al-Ansary Syed Noman Danish Abdelrahman El-Leathy Zeyad Al-Suhaibani Sheldon Jeter Redhwan Almuzaiqer Zeyad Almutairi |
| author_sort | Rageh Saeed |
| collection | DOAJ |
| description | The direct particle heating receiver (DPHR) represents a critical component within particle-based central receiver tower (CRT) systems, facilitating direct exposure of solid particles to concentrated solar irradiance. Among DPHRs, the obstructed flow particle heating receiver (OF-PHR) emerges as a novel design under development at King Saud University (KSU), enabling particles to descend freely in a curtain-like manner through straight-shaped porous obstructions. This configuration effectively attenuates particle acceleration during descent, thereby prolonging their residence time within the irradiated zone. The innovative design of a porous OF-PHR significantly enhances particle heating by forming a well-dispersed and substantially thicker particle curtain. Within this curtain, micro-cavities are generated, which dramatically reduce radiation loss to the sky by facilitating multiple reflections, effectively trapping intercepted rays, and thereby maximizing solar absorptance. Achieving high solar absorptance offers substantial economic benefits by enabling the storage of thermal energy in low-cost, naturally abundant solid particles, such as silica sand, despite their inherently poor optical properties. This research studies the main aspects that influence the effective solar absorptance (ESA) of the direct porous OF-PHR. A high-flux module (HFM) was devised and constructed to experimentally assess ESA, comprising a particle-handling unit, a primary concentrator, and a secondary concentrator. Particle curtain ESA was scrutinized across various parameters, particle flow rate, and PHR structural geometry, represented by porous obstruction packing, perforation size, and arrangements. Experimental tests were conducted on white sand (WS). ESA was compared to that of another two PHR configurations: Bare, and free-fall PHRs. ESA measurements revealed a substantial enhancement in particle curtain absorptivity compared to the particle-packed bed. The WS curtain attained a peak ESA of 0.85, contrasting with the packed bed absorptance of 0.42. |
| format | Article |
| id | doaj-art-941dd69ec7a34b4198d941975296ee41 |
| institution | Kabale University |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-02-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-941dd69ec7a34b4198d941975296ee412025-02-02T05:27:24ZengElsevierCase Studies in Thermal Engineering2214-157X2025-02-0166105769Experimental analysis of micro-cavity influence on the effective solar absorptance of white sand curtain on porous obstructions of particle heating receiversRageh Saeed0Shaker Alaqel1Eldwin Djajadiwinata2Nader S. Saleh3Abdulelah Alswaiyd4Hany Al-Ansary5Syed Noman Danish6Abdelrahman El-Leathy7Zeyad Al-Suhaibani8Sheldon Jeter9Redhwan Almuzaiqer10Zeyad Almutairi11Mechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; K.A.CARE Energy Research and Innovation Center at Riyadh, Riyadh, Saudi Arabia; Corresponding author. Mechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia.Mechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; K.A.CARE Energy Research and Innovation Center at Riyadh, Riyadh, Saudi ArabiaMechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; K.A.CARE Energy Research and Innovation Center at Riyadh, Riyadh, Saudi ArabiaMechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; K.A.CARE Energy Research and Innovation Center at Riyadh, Riyadh, Saudi ArabiaMechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi ArabiaMechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; K.A.CARE Energy Research and Innovation Center at Riyadh, Riyadh, Saudi Arabia; Corresponding author. Mechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia.Sustainable Energy Technologies Center, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; K.A.CARE Energy Research and Innovation Center at Riyadh, Riyadh, Saudi Arabia; Corresponding author. Sustainable Energy Technologies Center, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia.Mechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; K.A.CARE Energy Research and Innovation Center at Riyadh, Riyadh, Saudi ArabiaMechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi ArabiaGeorgia Institute of Technology, School of Mechanical Engineering, 771 Ferst Drive, Atlanta, GA, 30332, USAMechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; Sustainable Energy Technologies Center, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; K.A.CARE Energy Research and Innovation Center at Riyadh, Riyadh, Saudi ArabiaMechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; Sustainable Energy Technologies Center, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; K.A.CARE Energy Research and Innovation Center at Riyadh, Riyadh, Saudi ArabiaThe direct particle heating receiver (DPHR) represents a critical component within particle-based central receiver tower (CRT) systems, facilitating direct exposure of solid particles to concentrated solar irradiance. Among DPHRs, the obstructed flow particle heating receiver (OF-PHR) emerges as a novel design under development at King Saud University (KSU), enabling particles to descend freely in a curtain-like manner through straight-shaped porous obstructions. This configuration effectively attenuates particle acceleration during descent, thereby prolonging their residence time within the irradiated zone. The innovative design of a porous OF-PHR significantly enhances particle heating by forming a well-dispersed and substantially thicker particle curtain. Within this curtain, micro-cavities are generated, which dramatically reduce radiation loss to the sky by facilitating multiple reflections, effectively trapping intercepted rays, and thereby maximizing solar absorptance. Achieving high solar absorptance offers substantial economic benefits by enabling the storage of thermal energy in low-cost, naturally abundant solid particles, such as silica sand, despite their inherently poor optical properties. This research studies the main aspects that influence the effective solar absorptance (ESA) of the direct porous OF-PHR. A high-flux module (HFM) was devised and constructed to experimentally assess ESA, comprising a particle-handling unit, a primary concentrator, and a secondary concentrator. Particle curtain ESA was scrutinized across various parameters, particle flow rate, and PHR structural geometry, represented by porous obstruction packing, perforation size, and arrangements. Experimental tests were conducted on white sand (WS). ESA was compared to that of another two PHR configurations: Bare, and free-fall PHRs. ESA measurements revealed a substantial enhancement in particle curtain absorptivity compared to the particle-packed bed. The WS curtain attained a peak ESA of 0.85, contrasting with the packed bed absorptance of 0.42.http://www.sciencedirect.com/science/article/pii/S2214157X25000292Particle heating receiverParticle curtain absorptanceParticle-based CSP |
| spellingShingle | Rageh Saeed Shaker Alaqel Eldwin Djajadiwinata Nader S. Saleh Abdulelah Alswaiyd Hany Al-Ansary Syed Noman Danish Abdelrahman El-Leathy Zeyad Al-Suhaibani Sheldon Jeter Redhwan Almuzaiqer Zeyad Almutairi Experimental analysis of micro-cavity influence on the effective solar absorptance of white sand curtain on porous obstructions of particle heating receivers Case Studies in Thermal Engineering Particle heating receiver Particle curtain absorptance Particle-based CSP |
| title | Experimental analysis of micro-cavity influence on the effective solar absorptance of white sand curtain on porous obstructions of particle heating receivers |
| title_full | Experimental analysis of micro-cavity influence on the effective solar absorptance of white sand curtain on porous obstructions of particle heating receivers |
| title_fullStr | Experimental analysis of micro-cavity influence on the effective solar absorptance of white sand curtain on porous obstructions of particle heating receivers |
| title_full_unstemmed | Experimental analysis of micro-cavity influence on the effective solar absorptance of white sand curtain on porous obstructions of particle heating receivers |
| title_short | Experimental analysis of micro-cavity influence on the effective solar absorptance of white sand curtain on porous obstructions of particle heating receivers |
| title_sort | experimental analysis of micro cavity influence on the effective solar absorptance of white sand curtain on porous obstructions of particle heating receivers |
| topic | Particle heating receiver Particle curtain absorptance Particle-based CSP |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25000292 |
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