Preparation of microencapsulated phase change materials (MEPCM) for thermal energy storage

Su, Weiguang; Darkwa, Jo; Kokogiannakis, Georgios; Zhou, Tongyu; Li, Yiling

doi:10.1016/j.egypro.2017.07.485

Cited by 36 publications

(15 citation statements)

References 17 publications

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“…In contrast, the morphology of the binary emulsifiers of nonionic mixed emulsifiers (Brij 35 and Brij 30) at a low HLB value was better than the morphology of SDS. This confirmed the findings from our previous research for the preparation of MEPCM with poly (melamine formaldehyde shell) [2].…”

Section: Morphology Analysissupporting

confidence: 92%

“…Based on the series of ISO 11357 Standards [27][28][29], the thermal energy storage capacities and melting temperature of paraffin and fabricated MEPCM samples were measured at atmospheric pressure and at a heating rate of 2 • C/min from 5 • C to 65 • C [2]. The latent heat capacities of pure paraffin, sample UF-1, and sample UF-2 are shown in Figure 4, and were found to be as much as 194.0, 124.7, and 133.0 kJ/kg, respectively.…”

Section: Energy Storage Capacitymentioning

confidence: 99%

“…Solar thermal energy storage (TES) systems have low operating costs and have been increasingly integrated into hot water systems and space heating services in buildings [1,2]. Meanwhile, solar energy is a leading source among alternative energy sources due to the advancement of solar technologies and its declining cost [3,4].…”

Section: Introductionmentioning

confidence: 99%

“…In order to overcome these issues, previous researchers have investigated several methods, such as incorporation of PCMs into polymer materials [10], embedding PCMs into high thermal conductivity supporting materials (i.e., graphene oxide matrix [11], expanded graphite [12], graphene nanoplatelets [9], and carbon nanotubes [13]) as form-stable PCMs, and microencapsulation of PCMs [14][15][16]. For instance, we have conducted a theoretical study and demonstrated that using microencapsulated phase change materials (MEPCMs) in a fixed bed TES system could store more thermal energy for a relatively smaller size of water tank compared with a traditional one [2]. Meanwhile, microencapsulation is an appealing option for integrating PCMs into TES systems since it could limit the exposure of PCMs to the surrounding environment, enlarge the heat transfer area of PCMs, and sustain the volume as the phase change occurs [17].…”

Section: Introductionmentioning

confidence: 99%

“…The results showed that the MEPCM prepared with PUF had higher latent heat and regular morphology, but lower thermal resistant temperatures compared with the capsules prepared with the shells of poly (melamine-formaldehyde) and poly (melamine-urea-formaldehyde). Su et al [2] also developed MEPCM samples with two emulsifiers (Brij-30 and Brij-58) and compared the samples with a single emulsifier of SDS. The scanning electron microscopic (SEM) examination showed that the MEPCM fabricated with the binary emulsifiers achieved better morphologies than the one with SDS emulsifiers, although the SDS had hitherto been one of the most common emulsifiers for MEPCM fabrication.…”

Section: Introductionmentioning

confidence: 99%

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Microencapsulation of Paraffin with Poly (Urea Methacrylate) Shell for Solar Water Heater

Zhou

et al. 2019

Energies

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Previous research has demonstred that microencapsulated phase change materials (MEPCMs) could significantly increase the energy storage density of solar thermal energy storage (TES) systems. Compared with traditional phase change materials (PCMs), MEPCMs have many advantages since they can limit their exposure to the surrounding environment, enlarge the heat transfer area, and maintain the volume as the phase change occurs. In this study, a new MEPCM for solar TES systems is developed by encapsulation of paraffin wax with poly (urea formaldehyde) (PUF). The experimental results revealed that agglomeration of MEPCM particles occurred during the encapsulation process which affected the uniformity of the particle size distribution profile when sodium dodecyl sulfate was used as an emulsifier. The differential scanning calorimetric (DSC) analysis results showed that the melting temperatures were slightly increased by 0.14–0.72 °C after encapsulation. A thermogravimetric (TG) test showed that the sample weight decreased while the weight loss starting temperature was slightly increased after encapsulation. Overall, the sample UF-2, fabricated with the binary emulsifiers of Brij 35 and Brij 30 and 5% nucleating agent, resulted in good particle dispersion and shell integrity, higher core material content and encapsulation efficiency, as well as improved thermal stability.

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Section: Morphology Analysissupporting

confidence: 92%

Section: Energy Storage Capacitymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 3 more Smart Citations

Microencapsulation of Paraffin with Poly (Urea Methacrylate) Shell for Solar Water Heater

Zhou

et al. 2019

Energies

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Construction strategies and thermal energy storage applications of shape‐stabilized phase change materials

Yan

Wang

et al. 2021

J of Applied Polymer Sci

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Phase change materials (PCMs) are usually used in latent thermal energy storage systems to address the mismatch between heat energy supply and demand, due to their high energy storage density, high-latent heat, and almost constant temperature during phase change process. However, the low-thermal conductivity of PCMs and severe leakage during phase change limit their practical applications. Thus, extensive efforts have been devoted to constructing shapestabilized PCMs (SSPCMs). In this review, recent advances of the construction strategies and thermal energy storage applications of SSPCMs are summarized. Especially, the microencapsulated PCMs, SSPCMs based on porous scaffolds, as well as their potential applications are highlighted. Finally, the future perspectives and remaining challenges in this research field are prospected.

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PolyHIPE composite based‐form stable phase change material for thermal energy storage

Mert

2020

Int J Energy Res

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Summary A novel shape‐stabilized n‐hexadecane/polyHIPE composite phase change material (PCM) was designed and thermal energy storage properties were determined. Porous carbon‐based frameworks were produced by polymerization of styrene‐based high internal phase emulsions (HIPEs) in existence of the surface modified montmorillonite nanoclay. The morphological and mechanical properties of the obtained polyHIPEs were investigated by scanning electron microscopy analysis and the compression test, respectively. The polyHIPE composite with the best pore morphology and the highest compression modulus was determined as a framework to prepare the form stable n‐hexadecane/polyHIPE composite phase change material using the one‐step impregnation method. The chemical structure and morphologic property of composite PCM was investigated by FT‐IR and polarized optical microscopy analysis. Thermal stability of the form‐stable PCM (FSPCM) was examined by TG analysis. The n‐hexadecane fraction engaged into the carbon foam skeleton was found of as 55 wt% from TG curve. differential scanning calorimetry analysis was used for determining melting temperature and latent heat storage capacity of FSPCM and these values were determined as (26.36°C) and (143.41 J/g), respectively. The results indicated that the obtained composite material (FSPCM) has a considerable potential for low temperature (18°C‐30°C) thermal energy storage applications with its thermal energy storage capacity, appropriate phase change temperatures and high thermal stability.

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Preparation of microencapsulated phase change materials (MEPCM) for thermal energy storage

Cited by 36 publications

References 17 publications

Microencapsulation of Paraffin with Poly (Urea Methacrylate) Shell for Solar Water Heater

Microencapsulation of Paraffin with Poly (Urea Methacrylate) Shell for Solar Water Heater

Construction strategies and thermal energy storage applications of shape‐stabilized phase change materials

PolyHIPE composite based‐form stable phase change material for thermal energy storage

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