A Comprehensive Review of Harnessing the Potential of Phase Change Materials (PCMs) in Energy-Efficient Building Envelopes

Journal of Building Engineering, Journal Year: 2025, Volume and Issue: unknown, P. 111841 - 111841

Published: Jan. 1, 2025

Language: Английский

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Innovative PCM-enhanced recycled concrete for year-round energy savings and thermal regulation in buildings

Energy, Journal Year: 2025, Volume and Issue: unknown, P. 134825 - 134825

Published: Feb. 1, 2025

Language: Английский

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Experimental and Numerical Investigation of Heat Transfer Characteristics of Double-Layer Phase Change Walls for Enhanced Thermal Regulation in Summer Climates

Buildings, Journal Year: 2025, Volume and Issue: 15(6), P. 962 - 962

Published: March 19, 2025

This study employs the effective heat capacity method within COMSOL simulation framework to analyze thermal performance of double-layer phase-change walls under typical summer climatic conditions in Zhengzhou, Henan Province. The model considers a wall structure with total thickness 100 mm and height 300 mm, where exterior surface represents outdoor environment, interior indoor top bottom boundaries are assumed be adiabatic. A highly refined triangular mesh ensures numerical stability solution accuracy. Special attention is given influence Micro-PCM content on storage characteristics. Simulation results demonstrate that increasing substantially enhances regulation walls. At volume fraction 15%, peak temperature reduced by 4.33 °C compared conventional wall, while attenuation factor increases 16.88. Furthermore, mean delay extends 440 min, amplitude decreases 1.13 °C, instantaneous flux 13.24 W/m2. These findings highlight significant latent superior modulation walls, offering valuable technical reference for design energy-efficient building envelope systems.

Language: Английский

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Possibility investigation of phase change material-impregnated and surface coated cork as an aggregate for building envelope application

Advances in Building Energy Research, Journal Year: 2025, Volume and Issue: unknown, P. 1 - 27

Published: Jan. 15, 2025

PCM is a valuable construction material due to its energy efficiency, but leakage during phase changes poses challenges. This study developed cork storage aggregate (CESA) by vacuum impregnating with change (PCM) and coating it polymer silica fume address leakage. Experiments confirmed the suitability of CESA as building material, demonstrating compressive strength. Thermal analysis via differential scanning calorimetry showed decrease in enthalpy after impregnation, parafol-20Z displaying an 88 J/g compared 193.5 PCM. Despite reduced enthalpy, aggregates delayed temperature rise effectively tests. paraffin wax 1.48 times temperature-increasing time lag, 1.78 lag. These results meant that potential for energy-saving performance when this technology applied buildings. Laboratory experiments under varying ambient temperatures further significant heat capacity. findings highlight importance selecting based on external melting point optimal savings, reduce consumption construction.

Language: Английский

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Measured hygrothermal performance of energy activated facade in cold climate

Journal of Building Physics, Journal Year: 2025, Volume and Issue: unknown

Published: Jan. 24, 2025

This study assesses the hygrothermal performance of Photovoltaic External Thermal Insulation Composite System (PV ETICS), using a thick layer mortar with Phase Change Material (PCM) granules as passive heat sink. The experimental scenario involved wall system exposure to real outdoor climate conditions during 20-month long measurement period. Measured data were compared results from modelling. findings reveal that carefully designed diffusion channels PV ETICS demonstrated no accumulation moisture behind vapour-tight panel. Long term modelling for PCM content previously calibrated model predicted stable around 0.03 m 3 /m , significantly lower than first 2 years. Relative humidity panel falls into hygroscopic range on second spring after construction. annual maximum temperatures two summers 69°C, occurring in mid-August. Risk analysis was conducted historic understand, whether higher could be reached same different Overall, showed signs extensive damage testing period, but slight discolouring recorded. contributes valuable insights practical viability mortar, reaffirming its potential application larger scale building facades.

Language: Английский

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A machine learning and deep learning approach to the identification of heat transfer and phase change phenomena in cement mortar walls filled with bio-based PCM

Journal of Energy Storage, Journal Year: 2025, Volume and Issue: 121, P. 116540 - 116540

Published: April 12, 2025

Language: Английский

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Roles of Polymerization Temperature and Initiator Type on Thermal Properties of Rubitherm® 21 PCM Microcapsules

Micro, Journal Year: 2025, Volume and Issue: 5(2), P. 19 - 19

Published: April 12, 2025

Thermal energy storage offers a viable solution for managing intermediate availability challenges. Phase change materials (PCMs) have been extensively studied their capacity to store thermal when available and release it needed, maintaining narrow temperature range. However, effective utilization of PCMs requires its proper encapsulation in most applications. In this study, microcapsules containing Rubitherm®(RT) 21 PCM (Tpeak = °C, ΔH 140 kJ/kg), which is suitable buildings, were synthesized using suspension polymerization technique at different operating temperatures (45–75 °C). Two water-insoluble initiators evaluated: 2,2-Azobis (2,4-dimethyl valeronitrile) (Azo-65) benzoyl peroxide (BPO). The prepared characterized differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), particle size distribution (PSD), electron microscope (SEM), optical microscopy (OM). Additionally, the subjected multiple melting freezing cycles assess reliability performance stability. DSC results revealed that BPO exhibited latent heat comparable those produced with Azo-65 an 75 °C. onset crystallization BPO-encapsulated was approximately 2 °C lower than Azo-65-encapsulated PCMs. greatest melting, 107.76 J/g, by 45 representing content 82 wt. %. On other hand, 55 showed heats 96.02 J/g 95.66 respectively. degree supercooling reduced decreasing temperature, lowest observed All monodisperse PSD ~10 µm, indicating uniformity microcapsule demonstrating variations had no significant impact on distribution. Future research should focus low-temperature extended times.

Language: Английский

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Micro/Nano Encapsulated Phase Change Material: Materials, Preparation, and Emerging Advances in Solar Energy Field

Journal of Materials Chemistry A, Journal Year: 2024, Volume and Issue: unknown

Published: Jan. 1, 2024

Phase change materials (PCMs) possess high latent heat during the solid–liquid phase transition, making them promising for thermal energy storage.

Language: Английский

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Recent advances in enhanced thermal property in phase change materials using carbon nanotubes: A review

Solar Energy Materials and Solar Cells, Journal Year: 2024, Volume and Issue: 279, P. 113228 - 113228

Published: Oct. 21, 2024

Language: Английский

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Enhancing cold energy harvest with daytime passive radiative cooling and phase change materials integration: A numerical exploration

Applied Thermal Engineering, Journal Year: 2024, Volume and Issue: 249, P. 123449 - 123449

Published: May 19, 2024

Language: Английский

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