Geometry effect of phase change material container on waste heat recovery enhancement

Qin, Zhen; Ji, Chenzhen; Low, Zheng Hua; Tong, Wei Li; Wu, Chenlong; Duan, Fei

doi:10.1016/j.apenergy.2022.120108

Cited by 28 publications

(5 citation statements)

References 44 publications

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“…It is also known that container geometry and AR have an effect on PCM efficiency and there are many studies in the literature on this subject. Qin et al (2022) The selection of suitable container material for TES systems is an important issue that depends on the operating conditions. For instance, the ceramic is abrasive can withstand higher temperatures and has high stability even at such high temperatures (Punniakodi and Senthil, 2021).…”

Section: Nomenclature Symbolsmentioning

confidence: 99%

“…It is also known that container geometry and AR have an effect on PCM efficiency and there are many studies in the literature on this subject. Qin et al (2022) investigated the melting behaviour and heat storage performance of the PCM in containers with the same cross area but different configurations with rectangular shapes and ones with concave folded sidewalls and protruding folded sidewalls. Hekmat et al (2022) used six different container geometries as circle, horizontal ellipse, vertical ellipse, square, triangle, and downward and upward trapezes to investigate the effect of container geometry on PCM melting and solidification rate.…”

Section: Introductionmentioning

confidence: 99%

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A numerical study on the effects of inclination angle and container material on thermal energy storage by phase change material in a thick-walled disc

Kiyak,

Oztop,

Aksoy

2024

HFF

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Purpose The purpose of this study is to examine the effects of inclination angle on the thermal energy storage capability of a phase change material (PCM) within a disc-shaped container. Different container materials are also tested such as plexiglass and aluminium. This study aims to assess the energy storage capacity, melting behaviour and temperature distributions of PCM with a specific melting range (22°C–26°C) for various governing parameters such as inclination angles, aspect ratios (AR) and temperature differences (ΔT) and compare the melting behaviour and energy storage performance of PCM in aluminium containers to those in plexiglass containers. Design/methodology/approach A finite volume approach was adopted to evaluate the thermal energy storage capability of PCMs. Five inclination angles ranging from 0° to 180° were considered and the energy storage capacity. Also, the melting behaviour of the PCM and temperature distributions of the container with different materials were tested. Two different AR and ΔT values were chosen as parameters to analyse for their effects on the melting performance of the PCM. Conjugate heat transfer problem is solved to see the effects of conduction mode of heat transfer. Findings The results of the study indicate that as AR decreases, the effect of the inclination angles on the energy storage capacity of the PCM decreases. For lower ΔT, the difference between the maximum and minimum stored energies was 20.88% for AR = 0.20, whereas it was 6.85% for AR = 0.15. Furthermore, under the same conditions, the PCM stored 8.02% more energy in plexiglass containers than in aluminium containers. Originality/value This study contributes to the understanding of the influence of inclination angle, container material, AR and ΔT on the thermal energy storage capabilities of PCM in a novel designed container. The findings highlight the importance of AR in mitigating the effect of the inclination angle on energy storage capacity. Additionally, comparing aluminium and plexiglass containers provides insights into the effect of container material on the melting behaviour and energy storage properties of PCM.

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Section: Nomenclature Symbolsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

A numerical study on the effects of inclination angle and container material on thermal energy storage by phase change material in a thick-walled disc

Kiyak,

Oztop,

Aksoy

2024

HFF

View full text Add to dashboard Cite

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“…These systems operate within a limited temperature range, focusing on the phase transition temperature [11]. PCMs have broad applications across various domains, including underfloor heating [12], building energy management [13], solar power [14], waste heat recovery [15], domestic water heating [16], electronics thermal management [17], passive cooling [18], and thermal insulation for unmanned underwater vehicles [19], showcasing their versatility and effectiveness in enhancing energy efficiency and management.…”

Section: Literature Surveymentioning

confidence: 99%

A Review on Phase Change Materials for Sustainability Applications by Leveraging Machine Learning

Kumar,

Banerjee

2024

Energy Consumption, Conversion, Storage, and Efficiency

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Phase change materials (PCMs) have been envisioned for thermal energy storage (TES) and thermal management applications (TMAs), such as supplemental cooling for air-cooled condensers in power plants (to obviate water usage), electronics cooling (to reduce the environmental footprint of data centers), and buildings. In recent reports, machine learning (ML) techniques have been deployed to improve the sustainability, performance, resilience, robustness, and reliability of TES platforms that use PCMs by leveraging the Cold Finger Technique (CFT) to avoid supercooling (since supercooling can degrade the effectiveness and reliability of TES). Recent studies have shown that reliability of PCMs can be enhanced using additives, such as nucleators and gelling agents, including for organic (paraffin wax) and inorganic (e.g., salt hydrates and eutectics) PCMs. Additionally, material compatibility studies for PCMs with different metals and alloys have also garnered significant attention. Long-term studies for demonstrating the material stability and reliability of candidate PCMs will be summarized in this review book chapter.

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“…Researcher have studied different geometrical shapes to enhance the thermal performance of the latent thermal energy storage system (TESS) [ 1 , 21 , 22 ]. Shendao Zhang et al [ 1 ] prepared novel microencapsulated PCM to overcome the low thermal conductivity issue.…”

Section: Introductionmentioning

confidence: 99%

“…The thermal performance of the double shell microencapsulation of the PCM promised its good application in thermal management and heat storage. Zhen Qin et al [ 21 ] investigated melting behavior of PCM in a heat storage container. The results revealed that the geometry of the container affects the melting behavior of the PCM by influencing the natural convection.…”

Section: Introductionmentioning

confidence: 99%

Effect of Asymmetric Fins on Thermal Performance of Phase Change Material-Based Thermal Energy Storage Unit

et al. 2023

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Phase change material (PCM)-based thermal energy storage units (TESU) have very low thermal conductivity that compromise their charging and discharging rate. The present study focuses on an enhancement in charging rate as well as an increase in the uniformity of the melting rate. A rectangular cavity consisting of two horizontal partial fins is studied. The horizontal partial fins are placed symmetrically in a PCM-based TESU. In the current work, the melting rate of PCM was enhanced using asymmetric arrangement while keeping all other parameters the same, thus showing the positive effect of asymmetric configuration in such storage systems. The position and the pitch of each fin is optimized to improve heat transfer characteristics of the TESU. The numerical investigation of the problem is performed. TESU with asymmetrically placed fins show better performance in terms of higher charging rate as well as uniformity of the charging rate. The asymmetric placement of the fins suggested by present study increased the charging rate by 74.3% on average as compared to the symmetrically placed fins in the storage system. The charging rate uniformity is improved by 43.7%. The asymmetric fin’s placement conserved the convection strength for a longer melting duration and so increased the Nusselt number by 80.2% as compared to the symmetrically placed fins. Thus, it can be concluded that the performance of asymmetric fins is better in the charging of PCMs than the symmetrically placed fins in a PCM-based TESU.

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Geometry effect of phase change material container on waste heat recovery enhancement

Cited by 28 publications

References 44 publications

A numerical study on the effects of inclination angle and container material on thermal energy storage by phase change material in a thick-walled disc

A numerical study on the effects of inclination angle and container material on thermal energy storage by phase change material in a thick-walled disc

A Review on Phase Change Materials for Sustainability Applications by Leveraging Machine Learning

Effect of Asymmetric Fins on Thermal Performance of Phase Change Material-Based Thermal Energy Storage Unit

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