Particle-to-fluid direct-contact counter-flow heat exchanger: Simple-models validation and integration with a particle-based central tower system
This paper presents validation studies of two theoretical models of a direct-contact counter-flow particle-to-air heat exchanger. It also describes the integration of the proposed heat exchanger with a particle-based central tower system. Two basic models are analyzed: (1) the mixing model, which tr...
| Main Authors: | , , , , , , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-05-01
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| Series: | Case Studies in Thermal Engineering |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X22002404 |
| _version_ | 1828427626623008768 |
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| author | Shaker Alaqel Nader S. Saleh Rageh Saeed Eldwin Djajadiwinata Muhammad Sarfraz Abdulelah Alswaiyd Hany Al-Ansary Obida Zeitoun Syed Danish Zeyad Al-Suhaibani Abdelrahman El-Leathy Sheldon Jeter Ahmad Khayyat |
| author_facet | Shaker Alaqel Nader S. Saleh Rageh Saeed Eldwin Djajadiwinata Muhammad Sarfraz Abdulelah Alswaiyd Hany Al-Ansary Obida Zeitoun Syed Danish Zeyad Al-Suhaibani Abdelrahman El-Leathy Sheldon Jeter Ahmad Khayyat |
| author_sort | Shaker Alaqel |
| collection | DOAJ |
| description | This paper presents validation studies of two theoretical models of a direct-contact counter-flow particle-to-air heat exchanger. It also describes the integration of the proposed heat exchanger with a particle-based central tower system. Two basic models are analyzed: (1) the mixing model, which treats falling particles as an isolated particle falling downward in unbounded-atmospheric air, and (2) the simple-equilibrium model (SEM), which assumes that both the media reached thermal equilibrium in every segment along the exchanger. The mixing model predicted the outlet temperature quite accurately for the particles with 0.5 mm diameter. For CARBOEAD particles of 0.5 mm diameter, the predicted heat rate was within ±5% of the experimental results. The SEM overpredicted the outlet temperature regardless of particle size. A simple modification was added to the SEM, which led to improve the model predictions greatly. An integrated conceptual system design is also presented and discussed. The use of a double dump valve introduces many advantages towards a practical integrated system. Finally, employing particle strainers at the exchanger outlet is crucial to reduce/eliminate risks about the swept particles. |
| first_indexed | 2024-12-10T17:05:25Z |
| format | Article |
| id | doaj.art-f952e28d187d44b4acac627f06c34e44 |
| institution | Directory Open Access Journal |
| issn | 2214-157X |
| language | English |
| last_indexed | 2024-12-10T17:05:25Z |
| publishDate | 2022-05-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj.art-f952e28d187d44b4acac627f06c34e442022-12-22T01:40:28ZengElsevierCase Studies in Thermal Engineering2214-157X2022-05-0133101994Particle-to-fluid direct-contact counter-flow heat exchanger: Simple-models validation and integration with a particle-based central tower systemShaker Alaqel0Nader S. Saleh1Rageh Saeed2Eldwin Djajadiwinata3Muhammad Sarfraz4Abdulelah Alswaiyd5Hany Al-Ansary6Obida Zeitoun7Syed Danish8Zeyad Al-Suhaibani9Abdelrahman El-Leathy10Sheldon Jeter11Ahmad Khayyat12Mechanical Engineering Department, King Saud University, P.O. Box 800, Riyadh, 11421, Saudi Arabia; K.A.CARE Energy Research and Innovation Center at 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, 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, 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, Saudi ArabiaGeorgia Institute of Technology, School of Mechanical Engineering, 771 Ferst Drive, Atlanta, GA, 30332, USA; Sustainable Energy Technologies Center, King Saud University, P.O. Box 800, Riyadh, 11421, 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, 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, Saudi ArabiaSustainable Energy Technologies Center, King Saud University, P.O. Box 800, Riyadh, 11421, 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; Mechanical Power Engineering Dept., Faculty of Engineering, El-Mataria, Helwan University, Cairo, 11718, EgyptGeorgia Institute of Technology, School of Mechanical Engineering, 771 Ferst Drive, Atlanta, GA, 30332, USAResearch & Development Center, Saudi Aramco, P.O.Box 11953, Dhahran, 31311, Saudi ArabiaThis paper presents validation studies of two theoretical models of a direct-contact counter-flow particle-to-air heat exchanger. It also describes the integration of the proposed heat exchanger with a particle-based central tower system. Two basic models are analyzed: (1) the mixing model, which treats falling particles as an isolated particle falling downward in unbounded-atmospheric air, and (2) the simple-equilibrium model (SEM), which assumes that both the media reached thermal equilibrium in every segment along the exchanger. The mixing model predicted the outlet temperature quite accurately for the particles with 0.5 mm diameter. For CARBOEAD particles of 0.5 mm diameter, the predicted heat rate was within ±5% of the experimental results. The SEM overpredicted the outlet temperature regardless of particle size. A simple modification was added to the SEM, which led to improve the model predictions greatly. An integrated conceptual system design is also presented and discussed. The use of a double dump valve introduces many advantages towards a practical integrated system. Finally, employing particle strainers at the exchanger outlet is crucial to reduce/eliminate risks about the swept particles.http://www.sciencedirect.com/science/article/pii/S2214157X22002404Particle-to-fluid heat exchangerDirect-contact heat exchangerFalling-bed heat exchanger |
| spellingShingle | Shaker Alaqel Nader S. Saleh Rageh Saeed Eldwin Djajadiwinata Muhammad Sarfraz Abdulelah Alswaiyd Hany Al-Ansary Obida Zeitoun Syed Danish Zeyad Al-Suhaibani Abdelrahman El-Leathy Sheldon Jeter Ahmad Khayyat Particle-to-fluid direct-contact counter-flow heat exchanger: Simple-models validation and integration with a particle-based central tower system Case Studies in Thermal Engineering Particle-to-fluid heat exchanger Direct-contact heat exchanger Falling-bed heat exchanger |
| title | Particle-to-fluid direct-contact counter-flow heat exchanger: Simple-models validation and integration with a particle-based central tower system |
| title_full | Particle-to-fluid direct-contact counter-flow heat exchanger: Simple-models validation and integration with a particle-based central tower system |
| title_fullStr | Particle-to-fluid direct-contact counter-flow heat exchanger: Simple-models validation and integration with a particle-based central tower system |
| title_full_unstemmed | Particle-to-fluid direct-contact counter-flow heat exchanger: Simple-models validation and integration with a particle-based central tower system |
| title_short | Particle-to-fluid direct-contact counter-flow heat exchanger: Simple-models validation and integration with a particle-based central tower system |
| title_sort | particle to fluid direct contact counter flow heat exchanger simple models validation and integration with a particle based central tower system |
| topic | Particle-to-fluid heat exchanger Direct-contact heat exchanger Falling-bed heat exchanger |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X22002404 |
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