Optimal orientation of phase change material energy storage systems for different performance indicators and charging levels
This paper establishes the contradictory relationship between the storage orientation and both the charging levels and the performance indicators of single-stage latent heat thermal energy storage systems (LHTESS). The performance indicators (cycle charging capacity, charging time, charging rate, an...
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Elsevier
2025-04-01
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| Series: | Case Studies in Thermal Engineering |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S2214157X25001170 |
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| author | Reda Ameen ELSaeed Saad ELSihy Mohamed Shedid Hosny Abou-Ziyan |
| author_facet | Reda Ameen ELSaeed Saad ELSihy Mohamed Shedid Hosny Abou-Ziyan |
| author_sort | Reda Ameen |
| collection | DOAJ |
| description | This paper establishes the contradictory relationship between the storage orientation and both the charging levels and the performance indicators of single-stage latent heat thermal energy storage systems (LHTESS). The performance indicators (cycle charging capacity, charging time, charging rate, and average effectiveness) at seven inclination angles (0, 15, 30, 45, 60, 75, and 90°) and six charging levels (0.5, 0.7, 0.9, 0.98, 0.99, and 1.0) are obtained. A three-dimensional transient simulation model based on the enthalpy porosity technique is developed to evaluate the LHTESS performance. The results showed that the best inclination angle for the single-stage LHTESS is strongly related to the charging level and the considered performance indicator. The charging time and charging rate are more sensitive to the orientation and charging level than the effectiveness or cyclic charging capacity. Conversely, the maximum cycle charging capacity is independent of the charging level, as it always occurs with the horizontal LHTESS. At the complete charging level, the lowest charging time, the highest charging rate, and average effectiveness happen at an inclination angle of 60°. In contrast, the highest charging rate occurs at inclination angles of 15, 30, 45, and 60° at charging levels of 0.50, 0.70–0.90, 0.98–0.99, and 1.0, respectively. Also, the highest average effectiveness occurs for the horizontal LHTESS at liquid fractions of 0.50 and 0.70, 30° for a liquid fraction of 0.90, and 45° for liquid fractions of 0.98 and 0.99. |
| format | Article |
| id | doaj-art-929bc7c5a8e249c7b2cd7dc73c99a97b |
| institution | DOAJ |
| issn | 2214-157X |
| language | English |
| publishDate | 2025-04-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Case Studies in Thermal Engineering |
| spelling | doaj-art-929bc7c5a8e249c7b2cd7dc73c99a97b2025-08-20T02:59:50ZengElsevierCase Studies in Thermal Engineering2214-157X2025-04-016810585710.1016/j.csite.2025.105857Optimal orientation of phase change material energy storage systems for different performance indicators and charging levelsReda Ameen0ELSaeed Saad ELSihy1Mohamed Shedid2Hosny Abou-Ziyan3Mechanical Power Engineering Department, Faculty of Engineering-Mattaria, Helwan University, Massaken El-Helmia, P.O 11718, Cairo, EgyptMechanical Power Engineering Department, Faculty of Engineering-Mattaria, Helwan University, Massaken El-Helmia, P.O 11718, Cairo, Egypt; Corresponding author.Mechanical Power Engineering Department, Faculty of Engineering-Mattaria, Helwan University, Massaken El-Helmia, P.O 11718, Cairo, Egypt; Saskatchewan Polytechnic, Regina, Saskatchewan, CanadaMechanical Power Engineering Department, Faculty of Engineering-Mattaria, Helwan University, Massaken El-Helmia, P.O 11718, Cairo, Egypt; Mechanical Power Engineering Department, College of Technological Studies, PAAET, KuwaitThis paper establishes the contradictory relationship between the storage orientation and both the charging levels and the performance indicators of single-stage latent heat thermal energy storage systems (LHTESS). The performance indicators (cycle charging capacity, charging time, charging rate, and average effectiveness) at seven inclination angles (0, 15, 30, 45, 60, 75, and 90°) and six charging levels (0.5, 0.7, 0.9, 0.98, 0.99, and 1.0) are obtained. A three-dimensional transient simulation model based on the enthalpy porosity technique is developed to evaluate the LHTESS performance. The results showed that the best inclination angle for the single-stage LHTESS is strongly related to the charging level and the considered performance indicator. The charging time and charging rate are more sensitive to the orientation and charging level than the effectiveness or cyclic charging capacity. Conversely, the maximum cycle charging capacity is independent of the charging level, as it always occurs with the horizontal LHTESS. At the complete charging level, the lowest charging time, the highest charging rate, and average effectiveness happen at an inclination angle of 60°. In contrast, the highest charging rate occurs at inclination angles of 15, 30, 45, and 60° at charging levels of 0.50, 0.70–0.90, 0.98–0.99, and 1.0, respectively. Also, the highest average effectiveness occurs for the horizontal LHTESS at liquid fractions of 0.50 and 0.70, 30° for a liquid fraction of 0.90, and 45° for liquid fractions of 0.98 and 0.99.http://www.sciencedirect.com/science/article/pii/S2214157X25001170Latent heat thermal energy storage systemPhase change materialsInclination angleThermal performanceCharging rateEffectiveness |
| spellingShingle | Reda Ameen ELSaeed Saad ELSihy Mohamed Shedid Hosny Abou-Ziyan Optimal orientation of phase change material energy storage systems for different performance indicators and charging levels Case Studies in Thermal Engineering Latent heat thermal energy storage system Phase change materials Inclination angle Thermal performance Charging rate Effectiveness |
| title | Optimal orientation of phase change material energy storage systems for different performance indicators and charging levels |
| title_full | Optimal orientation of phase change material energy storage systems for different performance indicators and charging levels |
| title_fullStr | Optimal orientation of phase change material energy storage systems for different performance indicators and charging levels |
| title_full_unstemmed | Optimal orientation of phase change material energy storage systems for different performance indicators and charging levels |
| title_short | Optimal orientation of phase change material energy storage systems for different performance indicators and charging levels |
| title_sort | optimal orientation of phase change material energy storage systems for different performance indicators and charging levels |
| topic | Latent heat thermal energy storage system Phase change materials Inclination angle Thermal performance Charging rate Effectiveness |
| url | http://www.sciencedirect.com/science/article/pii/S2214157X25001170 |
| work_keys_str_mv | AT redaameen optimalorientationofphasechangematerialenergystoragesystemsfordifferentperformanceindicatorsandcharginglevels AT elsaeedsaadelsihy optimalorientationofphasechangematerialenergystoragesystemsfordifferentperformanceindicatorsandcharginglevels AT mohamedshedid optimalorientationofphasechangematerialenergystoragesystemsfordifferentperformanceindicatorsandcharginglevels AT hosnyabouziyan optimalorientationofphasechangematerialenergystoragesystemsfordifferentperformanceindicatorsandcharginglevels |