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

Bouzennada, Tarek; Mechighel, Farid; Ismail, Triki; Kolsi, Lioua; Ghachem, Kaouther

doi:10.1016/j.icheatmasstransfer.2021.105280

Cited by 66 publications

(15 citation statements)

References 16 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The PCM melting performance and accordingly the efficient energy storage process of PCM are affected by many parameters. One of these parameters is the inclination angle of the enclosure where the PCM is located (Abdulmunem et al , 2020; Bouzennada et al , 2021; Kothari et al , 2021). Because the transient melting process of a PCM is strongly affected by its inclination angle caused by the behaviour of natural convection (Korti and Guellil, 2020).…”

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

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.

show abstract

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

show abstract

“…Several studies show the advantage of PCM in terms of additional thermal performance 9–14 . Bouzennada et al 15 investigated the thermal behavior of PCM‐filled capsules and found that adding a horizontal midseparating fin at 0° inclination angle resulted in the fastest melting and storing energy rate, reducing melting time by up to 20.52%. They also discovered that positioning the heat transfer fluid tube at the bottom and increasing the Stefan number to 0.15 increased heat transfer and melting rates by 28% in a novel PCM capsule configuration 16 .…”

Section: Introductionmentioning

confidence: 99%

Improved heating floor thermal performance by adding PCM microcapsules enhanced by single and hybrid nanoparticles

et al. 2023

View full text Add to dashboard Cite

A heating floor is a low‐temperature emitter consisting of pipelines in which a fluid circulates between 35°C and 45°C. To ensure energy efficiency, occupant comfort, and building material durability, proper heat management is crucial in buildings. By using phase change materials (PCMs) in building envelopes, the indoor temperature can be regulated through the storage and release of thermal energy, which reduces energy consumption and enhances occupant comfort. In this study, we evaluated numerically a heating floor that incorporates a PCM enhanced by nanoparticles (NePCM). The aim of the numerical analysis is to assess the impact of the addition of single and hybrid nanoparticles in different proportions to the PCM layer on the thermal performance of the PCM‐based floor. Therefore, two main objectives are defined. The primary is to take advantage of the storage capacity of a PCM layer by integrating it into the ground; second, to evaluate the hot water temperature levels effect on the floor's performance. Additionally, we address the low thermal conductivity of PCM by enhancing PCM microcapsules with single and hybrid nanoparticles and comparing them to pure PCM. The numerical results obtained show that positioning the PCM microcapsules above the heating tubes (upper position) provides an optimum improvement in thermal performance. Moreover, the addition of hybrid nanoparticles within the base PCM, 1% of Cu mixed with 4% of Al2O3, allows an increase of 4°C, which relates to a reduction of 18% in the internal temperature amplitude and a phase shift of 6 h 30 min compared with the conventional heated floor in which there is no PCM.

show abstract

“…For large-scale simulations, a model for the PCM phase transition has to be established describing the released heat, conductivity, and heat loading. Several different applications [28][29][30] have been simulated applying PCM as the thermal management in fuel cells applying PCMs [31], the thermal management in automotive [32], or a rotating latent heat storage [33]. A special challenge is the simulation of the core-shell PCM [34].…”

Section: Introductionmentioning

confidence: 99%

Investigation of the Heat Storage Capacity and Storage Dynamics of a Novel Polymeric Macro-Encapsulated Core-Shell Particle Using a Paraffinic Core

2023

View full text Add to dashboard Cite

Thermal energy storages represent important devices for the decarbonisation of heat; hence, enabling a circular economy. Hereby, important tasks are the optimisation of thermal losses and providing a tuneable storage capacity, as well as tuneable storage dynamics for thermal energy storage modules which are composed of either sensible or phase change-based heat storage materials. The thermal storage capacity and the storage dynamics behaviour are crucial for fulfilling certain application requirements. In this work, a novel macro-encapsulated and spherical heat storage core-shell structure is presented and embedded in a supercritical ammonia working fluid flow field. The core of the macro-capsule is built by an organic low molecular weight substance showing a solid–liquid phase transition in a respective temperature zone, where the shell structure is made of polyvinylidene fluoride. Due to the direct coupling of computational fluid dynamics and the simulation of the phase transition of the core material, the influence of the working fluid flow field and shell thickness on the time evolution of temperature, heat transfer coefficients, and accumulated heat storage is investigated for this newly designed material system. It is shown that due to the mixed sensible and phase change storage character, the shell architecture and the working fluid flow field, the heat storage capacity and the storage dynamics can be systematically tuned.

show abstract

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

Cited by 66 publications

References 16 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

Improved heating floor thermal performance by adding PCM microcapsules enhanced by single and hybrid nanoparticles

Investigation of the Heat Storage Capacity and Storage Dynamics of a Novel Polymeric Macro-Encapsulated Core-Shell Particle Using a Paraffinic Core

Contact Info

Product

Resources

About