Climatic cycling assessment of red clay/perlite and vermiculite composite PCM for improving thermal inertia in buildings

Wi, Seunghwan; Yang, Sungwoong; Park, Ji Hun; Chang, Seong Jin; Kim, Sumin

doi:10.1016/j.buildenv.2019.106464

Cited by 51 publications

(12 citation statements)

References 38 publications

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“…Various practices have been pursued to deal with these obstacles such as adding conductive phases like metallic nanoparticles, use of PCM mixtures, changing composition, encapsulation, and extended surface. − On the other hand, the overcooling behavior, limits to the encapsulation capacity of PCM, thermal instability, and the leakage phenomenon occurring during phase transition are still major disadvantages that limit the applications of PCMs . To overcome these limitations, in addition to PCM microcapsules, − the application of shape-stable porous materials as a PCM carrier has received great interest in the literature. − To date, porous clay, mineral-based materials, metallic foams, porous carbon, and porous polymers , are the most commonly used framework materials for shape-stabilized PCM. High internal phase emulsion templated polymers (PHP) as porous polymers have been used in a wide variety of applications such as adsorption, , purification, , separation, controlled release, , and scaffolding, and there is limited research in energy storage application. , Recently, porous PHP foams have begun to gain attention for the stabilization of PCMs owing to their superior features such as shape stabilization, enclosure ability, high loading rate, excellent structural stability, and interpenetrating pore morphology. − PHPs are monolithic, controllable, highly porous polymers with low density, high specific surface area, highly cross-linked polymer matrix, the porosity of which is created by the continuous phase of emulsions.…”

Section: Introductionmentioning

confidence: 99%

CuO Nanoparticle@Polystyrene Hierarchical Porous Foam for the Effective Encapsulation of Octadecanol as a Phase Changing Thermal Energy Storage Material

2022

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CuO nanoparticle-doped hierarchical porous polymeric frameworks can be used for shape stability of octadecanol (OD) as a phase change material (PCM) for latent heat energy storage (LHTES) applications. A hierarchical porous foam polymer was synthesized by high internal phase emulsion polymerization of styrene and divinylbenzene doped with/without CuO. The synthesized high internal phase templated polymers (PHPs) with hierarchical pores were capable of absorbing up to 75 wt % OD without seepage behavior. The morphological, structural, and thermal behavior of PHPs/OD and PHPs@CuO/OD composite PCMs was determined using scanning electron microscopy (SEM)/energy-dispersive X-ray analysis (EDX), Brunauer–Emmett–Teller (BET) surface area analyses, Fourier transform infrared spectrophotometry (FT-IR), differential scanning calorimetry (DSC) analysis, and thermogravimetric analysis. Thermal analysis results revealed that PHP containing 75 wt % OD has an LHTES capacity of 190.4–194.0 J/g in the temperature range of 52.0–53.0 °C. The chemical and thermal stabilities of the developed composite PCMs were tested with repetitive thermal cycles. After 0.25 wt % CuO nanoparticle doping, the thermal conductivity of the composite PCM increased up to 86 and 17% compared to PHP and pure OD, respectively. Heat storage/releasing times of PHP@CuO/OD reduced about 20–22% relative to those of PHP/OD because of improved thermal conductivity. The thermal stability of PHP/OD and PHP@CuO/OD composites increased from 196 to 278 °C and 251 °C, respectively, compared to pure OD. The results exposed that especially PHP@CuO/OD composite PCMs are good candidates for LHTES applications because of their considerably high LHTES capacity.

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Section: Introductionmentioning

confidence: 99%

CuO Nanoparticle@Polystyrene Hierarchical Porous Foam for the Effective Encapsulation of Octadecanol as a Phase Changing Thermal Energy Storage Material

2022

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“…Clays are very abundant silicoaluminates worldwide. They are used mainly for to manufacture construction materials such as bricks and tiles, as well as in the ceramic sector (Wi, Yang, Park, Chang, and Kim, 2020;Moussi et al, 2020).…”

Section: Introductionmentioning

confidence: 99%

Removal of Pb(II) in Aqueous Solutions Using Synthesized Zeolite X from Ecuadorian Clay

et al. 2021

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Zeolite X was synthesized from clay using the alkaline fusion method and hydrothermal treatment to remove Pb(II) in aqueous solutions. Clay and zeolite were characterized through X-ray diffraction and fluorescence (XRD, FRX), as well as through specific surface area (SSA). The adsorbents were prepared as cylindrical extrudates using clay and a clay-zeolite combination (60-40%, respectively). The effects of pH, isotherm, and adsorption kinetics on the removal of Pb(II) in solutions of 80 mg Pb(II)/L were studied. It was possible to obtain a zeolite X from clay, with an SSA of 376 m2/g, 30 times greater than that of clay (12 m2/g). In the combined extrudate was present the zeolitic structure, with an SSA 12 times higher compared to the clay extrudate. The adsorption capacity, at 30 °C and V/m ratio of 1 g/L, is almost double compared to the clay extrudate (24 mg Pb(II)/g vs. 13 mg Pb(II)/g). Adsorption follows second order kinetics, and the Langmuir isotherm equation showed a good fit with the experimental equilibrium data for the two extrudates. The Webber-Morris and Bangham-Burt’s models suggest that pore and film diffusion influence the kinetic mechanism.

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“…Different authors have incorporated this type of microencapsulated PCM in building materials such as cement, gypsum or cement-lime mortars [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 ]. Besides, other additions, such as fibres (cellulose) and lightweight aggregates (LWAs, e.g., perlite), can be also incorporated to improve the thermal insulation capacity of mortars [ 16 , 17 , 18 ]. Some authors have studied the combined use of PCMs and these additions in mortars, taking advantage of both the the energy storage capacity of PCMs and the thermal insulation capacity [ 16 ].…”

Section: Introductionmentioning

confidence: 99%

“…However, the actual effect of the newly designed materials for improving building enclosures can only be fully evaluated by considering the multi-layered composition of real enclosures. Accordingly, some authors have studied the behaviour of multi-layered specimens by assessing new mortars with enhanced properties under different climatic conditions [ 15 , 17 , 18 , 19 , 20 , 21 ]. Climatic chambers can be used to test specific thermal conditions, simulating real environmental conditions [ 15 , 17 ].…”

Section: Introductionmentioning

confidence: 99%

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PCM Cement-Lime Mortars for Enhanced Energy Efficiency of Multilayered Building Enclosures under Different Climatic Conditions

2020

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Phase change materials (PCMs) are promising materials for the energy efficiency improvement of building enclosures, due to their energy storage capacity. The thermal behaviour of a multi-layered building enclosure with five different compositions of PCM cement-lime mortars was evaluated under heating and cooling cycles. The behaviour of cement-lime mortars with 20% of microencapsulated PCM mixed with other additions, such as cellulose fibres and perlite, a lightweight aggregate (LWA), were studied under climate conditions of 15 °C–82% RH (cooling) and 30 °C–33% RH (heating) that were applied with a climatic chamber. Temperature and heat flux on both sides of the multi-layered enclosure were experimentally measured in laboratory tests. Temperature was also measured on both sides of the PCM cement-lime mortar layer. It was observed that the addition of the PCM cement-lime mortar layer delayed the heat flux through the enclosure. During a heating cycle, the incorporation of PCM delayed the arrival of the heat wave front by 30 min (8.1% compared to the reference mortar without PCM). The delay of the arrival of the heat wave front during the cooling cycle after adding PCM, compared to the reference mixture, reached 40.6% (130 min of delay). Furthermore, the incorporation of LWA in PCM cement-lime mortars also improved thermal insulation, further increasing energy efficiency of the building enclosure, and can be used not only for new buildings but also for energy rehabilitation of existing building enclosures.

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Climatic cycling assessment of red clay/perlite and vermiculite composite PCM for improving thermal inertia in buildings

Cited by 51 publications

References 38 publications

CuO Nanoparticle@Polystyrene Hierarchical Porous Foam for the Effective Encapsulation of Octadecanol as a Phase Changing Thermal Energy Storage Material

CuO Nanoparticle@Polystyrene Hierarchical Porous Foam for the Effective Encapsulation of Octadecanol as a Phase Changing Thermal Energy Storage Material

Removal of Pb(II) in Aqueous Solutions Using Synthesized Zeolite X from Ecuadorian Clay

PCM Cement-Lime Mortars for Enhanced Energy Efficiency of Multilayered Building Enclosures under Different Climatic Conditions

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