Analysis of a twisted double-pipe heat exchanger with lobed cross-section as a novel heat storage unit for solar collectors using phase-change material

Article Engineering, Mechanical

Thermal Performance of Constrained Melting of PCM Inside an Elliptical Capsule of Two Orientations

Nabeel S. Dhaidan

Summary: The orientation of the capsule has a small effect on the melting process, while the wall heat flux has a significant influence. In oblate capsules, the melting process is relatively faster and requires less time.

IRANIAN JOURNAL OF SCIENCE AND TECHNOLOGY-TRANSACTIONS OF MECHANICAL ENGINEERING (2021)

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Article Thermodynamics

Numerical study of a latent heat thermal energy storage system enhanced by varying fin configurations

Saeed Tiari et al.

Summary: This study investigates the impact of using different types of fins on the performance of a latent heat thermal energy storage system during charging and discharging processes. The results show that twenty fins with uniform length have the best effect on charging and discharging time reduction.

CASE STUDIES IN THERMAL ENGINEERING (2021)

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Article Engineering, Multidisciplinary

Effect of two different fins (longitudinal-tree like) and hybrid nano-particles (MoS2 - TiO2) on solidification process in triplex latent heat thermal energy storage system

Kh Hosseinzadeh et al.

Summary: This study explores the use of a triplex-tube heat exchanger with hybrid nanoparticles to address the weak thermal conductivity of Phase Change Material (PCM) based storage units. Through Galerkin Finite Element Method (GFEM) analysis and experimental validation, it was found that the combined usage of nanoparticles and tree-like fins significantly reduces solidification time, with tree-like fins demonstrating the best performance.

ALEXANDRIA ENGINEERING JOURNAL (2021)

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Article Energy & Fuels

Solidification enhancement in triplex thermal energy storage system via triplets fins configuration and hybrid nanoparticles

Kh Hosseinzadeh et al.

Summary: This study achieved an improved PCM solidification rate in a triplex-tube storage system by combining hybrid nanoparticles (MoS2 - Fe3O4) and a novel fin configuration. The computational model validated the effects of these methods on phase change rate and solidification process time, demonstrating enhancement in PCM solidification efficiency.

JOURNAL OF ENERGY STORAGE (2021)

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Article Thermodynamics

Numerical simulations and experimental verification of the thermal performance of phase change materials in a tube-bundle latent heat thermal energy storage system

Mustafa S. Mahdi et al.

Summary: Theoretical simulation and experimental validation were conducted on a new design tube-bundle latent-heat thermal storage (LHTS) system, showing superior thermal performance and fast charging and discharging periods compared to a double-pipe LHTS. The time for charging and discharging processes was shortened by about 85.3% and 82.5%, respectively.

APPLIED THERMAL ENGINEERING (2021)

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Article Thermodynamics

Using triply periodic minimal surfaces (TPMS)-based metal foams structures as skeleton for metal-foam-PCM composites for thermal energy storage and energy management applications

Zahid Ahmed Qureshi et al.

Summary: This study investigates the use of novel structures as skeletons for metal foam-PCM composites, comparing their thermal energy storage performance through transient numerical simulations and steady state simulations. The results demonstrate that the novel structures show superior performance in enhancing effective thermal conductivity.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Heat transfer and fluid flow in a PCM-filled enclosure: Effect of inclination angle and mid-separation fin

Tarek Bouzennada et al.

Summary: This paper presents a numerical study on the thermal behavior within a phase change material filling up a rectangular capsule with and without adding a fin, showing that the melting and storing energy rate increase with changing the capsule's inclination angle. Moreover, adding a fin can reduce the melting time and accelerate the rate of storing thermal energy, with the best choice being a horizontal fin with an inclination angle of 0 degrees.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics

Modeling the thermal energy storage capability of a phase change material confined in a rectangular cavity

Xuewei Zhang et al.

Summary: This project investigates the use of PCM as a thermal energy barrier, introducing a new efficiency metric. Results show that the predicted thermal barrier efficiency exceeds the limits, offering useful conservative estimates for designing PCM thermal barriers.

INTERNATIONAL COMMUNICATIONS IN HEAT AND MASS TRANSFER (2021)

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Article Thermodynamics