Optimal orientation of phase change material energy storage systems for different performance indicators and charging levels

IF 6.4 2区工程技术 Q1 THERMODYNAMICS

Case Studies in Thermal Engineering Pub Date : 2025-02-10 DOI:10.1016/j.csite.2025.105857

Reda Ameen , ELSaeed Saad ELSihy , Mohamed Shedid , Hosny Abou-Ziyan

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引用次数: 0

Abstract

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.

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来源期刊

Case Studies in Thermal Engineering Chemical Engineering-Fluid Flow and Transfer Processes

CiteScore

8.60

自引率

11.80%

发文量

812

审稿时长

76 days

期刊介绍： Case Studies in Thermal Engineering provides a forum for the rapid publication of short, structured Case Studies in Thermal Engineering and related Short Communications. It provides an essential compendium of case studies for researchers and practitioners in the field of thermal engineering and others who are interested in aspects of thermal engineering cases that could affect other engineering processes. The journal not only publishes new and novel case studies, but also provides a forum for the publication of high quality descriptions of classic thermal engineering problems. The scope of the journal includes case studies of thermal engineering problems in components, devices and systems using existing experimental and numerical techniques in the areas of mechanical, aerospace, chemical, medical, thermal management for electronics, heat exchangers, regeneration, solar thermal energy, thermal storage, building energy conservation, and power generation. Case studies of thermal problems in other areas will also be considered.