Development of microencapsulated phase change material for solar thermal energy storage

Su, Weiguang; Darkwa, Jo; Kokogiannakis, Georgios

doi:10.1016/j.applthermaleng.2016.11.009

Cited by 120 publications

(29 citation statements)

References 28 publications

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“…These materials are mainly plastics 112 such as acrylic and high-density polyethylene. 113,114 The most commonly used capsule materials for microencapsulation and nanoencapsulation are organic polymers such as melamine-formaldehyde resins, 115,116 urea formaldehyde resin, 117 phenolic resin, 118 polystyrene, 119 and arabic gum. 120 The mechanical strength of organic shell increases the structural stability of microcapsule system.…”

Section: Methodsmentioning

confidence: 99%

Review of latent thermal energy storage systems for solar air‐conditioning systems

et al. 2019

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Solar air conditioning is an important approach to satisfy the high demand for cooling given the global energy situation. The application of phase-change materials (PCMs) in a thermal storage system is a way to address temporary power problems of solar air-conditioning systems. This paper reviews the selection, strengthening, and application of PCMs and containers in latent thermal storage system for solar air-conditioning systems. The optimization of PCM container geometry is summarized and analyzed. The hybrid enhancement methods for PCMs and containers and the cost assessment of latent thermal storage system are discussed. The more effective heat transfer enhancement using PCMs was found to mainly involve micro-nano additives. Combinations of fins and nanoadditives, nanoparticles, and metal foam are the main hybrid strengthening method. However, the thermal storage effect of hybrid strengthening is not necessarily better than single strengthening. At the same time, the latent thermal storage unit has less application in the field of solar airconditioning systems, especially regarding heat recovery, because of its cost and thermal storage time. The integration of latent thermal storage units and solar air-conditioning components, economic analysis of improvement technology, and quantitative studies on hybrid improvement are potential research directions in the future.

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Section: Methodsmentioning

confidence: 99%

Review of latent thermal energy storage systems for solar air‐conditioning systems

et al. 2019

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“…The preparation process comprises the following steps: homogeneous oil solution preparation: the dispersed phase is mixed for 15 min at 40°C under electromagnetic stirring; oil‐in‐water emulsion formation: the dispersed phase is added to the continuous phase, and this mixture is kept at 40°C for 10 min; homogeneous stable emulsion: the oil‐in‐water emulsion is placed into a 250 mL flask and homogenized for 20 min at 1200 rpm; suspension‐like polymerization process: the emulsion is stirred at 600 rpm for 6 h at 85°C; posttreatment: the resultant samples are filtered and washed three times with deionized water and finally dried at 45°C for 48 h in an oven.…”

Section: Methodsmentioning

confidence: 99%

“…Microencapsulated phase‐change materials (micro‐PCMs) have great potential as thermal energy storage materials . These micro‐PCMs are composed of core and shell materials.…”

Section: Introductionmentioning

confidence: 99%

Investigations on thermal properties of microencapsulated phase‐change materials with different acrylate‐based copolymer shells as thermal insulation materials

Yan

Xie

Wang

2019

J of Applied Polymer Sci

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A series of microencapsulated phase‐change materials (micro‐PCMs) with binary cores and acrylate‐based copolymer shells were prepared. The micro‐PCMs contained octadecane and butyl stearate as binary‐core materials. Allyl methacrylate, ethylene glycol dimethacrylate, 1,4‐butanediol diacrylate (BDDA), and 1,6‐hexanediol dimethacrylate were respectively introduced to copolymerize with divinylbenzene (DVB) to form different microcapsule shells. In this work, the influence of the types of core and shell materials and core–shell weight ratios on the thermal properties of micro‐PCMs was studied. The chemical structures, morphologies, thermal properties, and thermal insulation properties of the wallboards were all tested and discussed. Scanning electron microscope photographs show that these micro‐PCMs have relatively spherical profiles and compact surfaces with diameters ranging from 10 to 80 μm. Differential scanning calorimetry results indicated that their microencapsulation efficiency ranged from 48 wt % to 80 wt %. A thermogravimetric analysis demonstrated that these micro‐PCMs can ensure their thermal stability below 210°C. Finally, a thermal insulation wallboard fabricated with synthesized P(BDDA‐co‐DVB) micro‐PCMs showed excellent thermal energy storage performance, keeping the temperature fluctuation within 2.5°C. © 2019 Wiley Periodicals, Inc. J. Appl. Polym. Sci. 2019, 136, 47777.

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“…Physical methods include spray cooling and spray drying . The commonly used chemical methods are in situ polymerization, interfacial polymerization, suspension polymerization, and emulsion polymerization . The commonly used physicochemical methods include coacervation and sol–gel .…”

Section: Encapsulation Of Solid–liquid Pcmsmentioning

confidence: 99%

Latent Heat Thermal Energy Storage Systems with Solid–Liquid Phase Change Materials: A Review

Zhang¹,

Yuan²,

Cao³

et al. 2018

Adv Eng Mater

367

108

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This paper provides a review of the solid-liquid phase change materials (PCMs) for latent heat thermal energy storage (LHTES). The commonly used solid-liquid PCMs and their thermal properties are summarized here firstly. Two major drawbacks that seriously limit the application of PCMs in an LHTES system, that is, low thermal conductivity and liquid leakage, are discussed. Various methods for enhancing the thermal conductivity and heat transfer of solid-liquid PCMs are explained. Previous studies regarding formstable composite PCMs and microencapsulated PCMs are also presented. Furthermore, applications of the solid-liquid PCMs used in LHTES and thermal management systems are introduced and analyzed. Finally, future outlooks and research topics are proposed.

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Development of microencapsulated phase change material for solar thermal energy storage

Cited by 120 publications

References 28 publications

Review of latent thermal energy storage systems for solar air‐conditioning systems

Review of latent thermal energy storage systems for solar air‐conditioning systems

Investigations on thermal properties of microencapsulated phase‐change materials with different acrylate‐based copolymer shells as thermal insulation materials

Latent Heat Thermal Energy Storage Systems with Solid–Liquid Phase Change Materials: A Review

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