Review on micro/nano phase change materials for solar thermal applications

Qiu, Lin; Ouyang, Yuxin; Feng, Yanhui; Zhang, Xinxin

doi:10.1016/j.renene.2019.03.088

Cited by 195 publications

(54 citation statements)

References 127 publications

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“…The box size for pure paraffin was 65 Â 65 Â 65 A 3 for 500 octadecane molecules. For the nanocomposite, the size of the box was 75 Â 75 Â 75 A 3 . The graphene and BNNS weight proportions in the composite mixture were approximately 4.9% and 5.1%, respectively.…”

Section: Structuresmentioning

confidence: 99%

“…2 Different kinds of paraffins have many advantages such as high latent heat, low cost, and excellent melting temperature range, but an important disadvantage is their low thermal conductivity. 3 Using high thermal conductive nanoparticles 4 can ameliorate this defect. 5 Qu et al 6 studied the effect of a hybrid of expanded graphite (EG) and multi-walled carbon nanotube (MWCNT) on the thermal conductivity enhancement of paraffin.…”

Section: Introductionmentioning

confidence: 99%

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Investigating the effects of adding hybrid nanoparticles, graphene and boron nitride nanosheets, to octadecane on its thermal properties

et al. 2020

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Section: Structuresmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Investigating the effects of adding hybrid nanoparticles, graphene and boron nitride nanosheets, to octadecane on its thermal properties

et al. 2020

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“…Especially, solar energy is recognized as a potential candidate owing to its environment‐friendly nature 5‐7 . For this reason, many scholars have devoted extensive efforts to the development of solar energy utilization technologies 8‐10 . Among the technologies being explored, solar thermal utilization is the most efficient technique to take advantage of solar energy 11,12 .…”

Section: Introductionmentioning

confidence: 99%

Photo‐thermal conversion and heat storage characteristics of multi‐walled carbon nanotubes dispersed magnetic phase change microcapsules slurry

et al. 2020

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Summary The development of high‐efficient working fluids with excellent photo‐thermal conversion and heat storage properties is an important factor to solar thermal utilization. In this work, magnetic phase change microcapsules (MPCMs) were prepared via in situ polymerization, where melamine‐formaldehyde (MF) resin and octadecane containing oleic acid‐coated magnetic nanoparticles (OA‐MNs) were used as the shell and core, respectively. The microstructure, magnetic and thermal properties of MPCMs were investigated, and the photo‐thermal conversion and heat storage properties of slurries prepared by dispersing MPCMs into multi‐walled carbon nanotubes (MWCNTs) nanofluids were explored. The encapsulation efficiency of MPCMs with superparamagnetic nature achieved 63.51%, while the thermal conductivity of MPCMs was slightly increased with regard to phase change microcapsules (PCMs) and the thermal stability of octadecane was enhanced after being encapsulated. Moreover, the slurry with 0.01 wt% MWCNTs and 15 wt% MPCMs had the optimal photo‐thermal conversion properties and thermal storage capacity. Beyond that, the recycled MPCMs represented excellent recyclability. Our research demonstrated that the MWCNTs‐dispersed MPCMs slurry is one of ideal working fluids with excellent photo‐thermal conversion and heat storage characteristics for direct absorption solar collector.

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“…Microcapsule encapsulation technique can effectively prevent leakage, enhance thermal conductivity, increase thermal and chemical stability and improve compatibility in the field of energy storage applications. [1][2][3] Currently, the widely used inorganic shells possess excellent thermal stability and thermophysical properties compared with organic shells. [4][5][6] Researchers try to develop inorganic shells through in-situ polymerization and interfacial polymerization methods, [7][8][9] including silicon dioxide (SiO 2 ), 10,11 zinc oxide (ZnO), 12,13 titanium dioxide (TiO 2 ), 11,14 zirconium oxide (ZrO 2 ) 15 and cuprous oxide (Cu 2 O).…”

Section: Introductionmentioning

confidence: 99%

Study on the microstructures and thermal properties of SiO ₂ @ NaNO ₃ microcapsule thermal storage materials

Chen

Cheng

et al. 2020

Int J Energy Res

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In this paper a novel SiO 2 @NaNO 3 microcapsule thermal storage material is successfully fabricated via water-limited sol-gel method. The effects of SiO 2 nanoparticles on the microstructures, thermal conductivity, specific heat capacity, latent heat and thermal stability are investigated. SEM and TEM investigation indicates that the spherical SiO 2 nanoparticles with an average diameters of 30 nm are coated on the surface of NaNO 3 evenly to form a homogeneous and stable core-shell structure. Microencapsulated composites are characterized by XRD and FTIR to determine the chemical compositions and structures. The thermal conductivity of SiO 2 @NaNO 3 microcapsules is significantly enhanced by 62.9% (0.756 W m −1 K −1) compared with 0.464 W m −1 K −1 of that of NaNO 3. In addition, the latent heat, phase change temperature, specific heat capacity and thickness of shell of the microencapsulated NaNO 3 with 18.1 wt% SiO 2 were 310.1 C, 144.7 J g −1 , 1.831 J/(gÁK), and 80-150 nm, respectively. Furthermore, microencapsulated NaNO 3 have excellent shape and thermal stability at working temperature range. SiO 2 nanoparticles are uniformly attached to the modified NaNO 3 by electrostatic interaction to create a physical protective SiO 2 barrier, which can effectively inhibit the leakage and cauterization of melting NaNO 3. K E Y W O R D S microencapsulated composites, NaNO 3 , novel sol-gel method, SiO 2 nanoparticles, thermal properties

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Review on micro/nano phase change materials for solar thermal applications

Cited by 195 publications

References 127 publications

Investigating the effects of adding hybrid nanoparticles, graphene and boron nitride nanosheets, to octadecane on its thermal properties

Investigating the effects of adding hybrid nanoparticles, graphene and boron nitride nanosheets, to octadecane on its thermal properties

Photo‐thermal conversion and heat storage characteristics of multi‐walled carbon nanotubes dispersed magnetic phase change microcapsules slurry

Study on the microstructures and thermal properties of SiO ₂ @ NaNO ₃ microcapsule thermal storage materials

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Review on micro/nano phase change materials for solar thermal applications

Cited by 195 publications

References 127 publications

Investigating the effects of adding hybrid nanoparticles, graphene and boron nitride nanosheets, to octadecane on its thermal properties

Investigating the effects of adding hybrid nanoparticles, graphene and boron nitride nanosheets, to octadecane on its thermal properties

Photo‐thermal conversion and heat storage characteristics of multi‐walled carbon nanotubes dispersed magnetic phase change microcapsules slurry

Study on the microstructures and thermal properties of SiO 2 @ NaNO 3 microcapsule thermal storage materials

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Study on the microstructures and thermal properties of SiO ₂ @ NaNO ₃ microcapsule thermal storage materials