Numerical study of phase change material microencapsulated in a typical multilayer wall for a hot climatic zone

Babaharra, Oumayma; Choukairy, Khadija; Khallaki, K.; Mounir, Sanaa Hayani

doi:10.1002/htj.22348

Cited by 6 publications

(6 citation statements)

References 25 publications

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“…As detailed in references, 22,23 this property contributes to the reduction of interior temperature volatility, promoting a more stable and comfortable indoor environment. Furthermore, PCM's advantageous characteristics extend to enhancing sound insulation, as indicated by studies referenced in 24–26 . These findings underscore the multifaceted benefits of incorporating PCMs into building materials, not only for thermal efficiency but also for acoustic performance.…”

Section: Introductionmentioning

confidence: 73%

“…Furthermore, PCM's advantageous characteristics extend to enhancing sound insulation, as indicated by studies referenced in. [24][25][26] These findings underscore the multifaceted benefits of incorporating PCMs into building materials, not only for thermal efficiency but also for acoustic performance. Improving heat transfer, microencapsulated PCMs in plasterboard resulted in a 12% cooling load reduction.…”

Section: Introductionmentioning

confidence: 80%

“…However, the majority of Morocco's regions continue to struggle with indoor heating issues in residential and tertiary structures. Construction accounts for 33% of Moroccan final energy consumption and is rapidly growing 1–3 . According to the International Energy Agency, primary energy demand will rise by 37% by 2040 4 .…”

Section: Introductionmentioning

confidence: 99%

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Thermal performance analysis of hollow bricks integrated phase change materials for various climate zones

Babaharra,

Choukairy,

Faraji

et al. 2024

Heat Trans

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This comprehensive research addresses the significant challenge of building‐related energy consumption in Morocco. Our innovative approach involves integrating phase change materials (PCMs) into hollow bricks, strategically addressing the diverse climate zones prevalent in the country. The primary focus is on enhancing energy efficiency within structures. Leveraging detailed simulations and employing the enthalpy‐porosity approach, our study models the impact of PCMs on internal temperatures. Optimal outcomes are achieved by partially filling brick holes with PCMs in specific configurations, demonstrating the materials' ability to adapt to varying conditions. A noteworthy finding is the 2–3‐h phase shift observed in cold zones, indicating the potential for PCMs to effectively regulate temperatures. Equally significant is their capability to maintain a constant internal temperature of 26°C in hot zones, even amidst extreme external conditions reaching up to 47°C. This resilience underscores the novel and tailored thermal regulation potential of PCMs. Beyond the technical insights, our research highlights the paramount importance of considering regional climates in PCM applications' implementation. This awareness is crucial for optimizing energy performance in buildings and ensuring sustainability. In essence, this study contributes valuable knowledge and practical implications for the strategic deployment of PCMs to enhance building energy efficiency, emphasizing the need for context‐specific solutions in diverse environmental conditions.

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Section: Introductionmentioning

confidence: 73%

Section: Introductionmentioning

confidence: 80%

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Thermal performance analysis of hollow bricks integrated phase change materials for various climate zones

Babaharra,

Choukairy,

Faraji

et al. 2024

Heat Trans

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“…PCM as latent storage materials can store 5–14 times more than conventional materials 8 . 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%.…”

Section: Introductionmentioning

confidence: 99%

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

et al. 2023

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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.

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“…The addition of single and hybrid nanoparticles in different proportions to the PCM layer can enhance the storage capacity of the PCM layer and reduce the internal temperature amplitude by up to 18%. The hybrid nanoparticles allowed for an increase of 4°C and a phase shift of 6 hours 30 minutes compared to a conventional heated floor without PCM 11 …”

Section: Introductionmentioning

confidence: 99%

Numerical prediction of the solidification and melting of encapsulated nano‐enhanced phase change materials

Cofré‐Toledo,

Muñoz‐Cuevas,

Jofré‐Severino

et al. 2023

Energy Storage

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The thermal properties of Octadecane vary due to the addition of copper oxide (CuO) nanoparticles. The synthesis of two nano‐enhanced phase change material (NEPCM) required the implementation of the two‐step method, using Octadecane as the base phase change material and CuO nanoparticles at 2.5 and 5.0 wt%. The experimental characterization determined the specific heat capacity, and thermal conductivity of the NEPCMs solid phase, including phase change enthalpy and temperature. These experimental results were then utilized for computational simulation of the thermal charging (solidification) and discharging (melting) processes of NEPCMs within a spherical enclosure, employing the ANSYS/Fluent software. The incorporation of CuO nanoparticles led to an increase in thermal conductivity while causing a decrease in specific heat capacity, enthalpy, and phase change temperature of Octadecane. The computational results revealed a reduction in the melting period and an improvement in the solidification of both NEPCMs. In terms of melting, the convective heat transfer coefficient increased by approximately 27.4% and 3.2% for the NEPCM at 2.5 and 5.0 wt% CuO, respectively. During the solidification process, the overall heat transfer coefficient experienced a significant increase of 43.8% and 59.8% for the NEPCM at 2.5 and 5.0 wt%, respectively.

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Numerical study of phase change material microencapsulated in a typical multilayer wall for a hot climatic zone

Cited by 6 publications

References 25 publications

Thermal performance analysis of hollow bricks integrated phase change materials for various climate zones

Thermal performance analysis of hollow bricks integrated phase change materials for various climate zones

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

Numerical prediction of the solidification and melting of encapsulated nano‐enhanced phase change materials

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