Preparation and thermal characterization of paraffin/metal foam composite phase change material

Xiao, Xin; Zhang, P.; Li, M.

doi:10.1016/j.apenergy.2013.04.050

Cited by 500 publications

(116 citation statements)

References 28 publications

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“…The general way to improve thermal conductivity of paraffin PCMs is to add highly thermally-conductive fillers. Metal fillers have good thermal conductivity and, thus, were used often [5][6][7][8][9]. For example, Wu et al [6] reported that by adding 1 wt % Cu nanoparticles into paraffin (Tm = 58-60 • C), the heating and cooling times were reduced by 30.3% and 28.2%, respectively.…”

Section: Introductionmentioning

confidence: 99%

“…For example, Wu et al [6] reported that by adding 1 wt % Cu nanoparticles into paraffin (Tm = 58-60 • C), the heating and cooling times were reduced by 30.3% and 28.2%, respectively. Xiao et al [8] prepared paraffin (Tm = 60-62 • C)/nickel foam and paraffin/copper foam composites by using a vacuum impregnation method. The result showed that the thermal conductivities of the paraffin/nickel foam and the paraffin/copper foam composites were nearly three and 15 times larger than that of pure paraffin.…”

Section: Introductionmentioning

confidence: 99%

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Synergistically-Enhanced Thermal Conductivity of Shape-Stabilized Phase Change Materials by Expanded Graphite and Carbon Nanotube

Liu

Yang

2017

Applied Sciences

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Featured Application: This work faces applications in energy-saving buildings. The involved shape-stabilized phase change material is a promising material used in walls or floors of buildings to regulating the room temperature in a comfortable range, taking advantage of clean and sustainable solar energy or off-peak electricity. Abstract:The thermal conductivity of expanded graphite plate (EGP) and/or multi-wall carbon nanotube (MWCNT)-filled, shape-stabilized, phase change material (SSPCM), based on paraffin, high-density polyethylene (HDPE), and styrene-butadiene-styrene copolymer (SBS), was investigated. The results demonstrated that both EGP and MWCNT increased the thermal conductivity of the SSPCM. EGP showed a greater thermal conductivity improvement than MWCNT. The conductivity of EGP-filled SSPCM reached 0.574 W/mK at 9 wt %, while that of MWCNT was just 0.372 W/mK at the same loading. Furthermore a series of EGP/MWCNT hybrid fillers were prepared and introduced into the SSPCM, and a synergistic effect was observed between the two fillers. When the EGP/MWCNT ratio was 8:2, the most significant thermal conductivity enhancement to the SSPCM was obtained. The thermal conductivity was 0.674 W/mK, 288% that of the SSPCM and 117% that of 9 wt % EGP-filled SSPCM. The SEM photos showed that a bridging of two-dimensional (2D) planar EGP by flexible one-dimensional (1D) MWCNT was constructed. The so-formed EGP-MWCNT network favored heat transfer along it and led to a decreased thermal interface resistance due to the increased EGP-MWCNT junctions.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Synergistically-Enhanced Thermal Conductivity of Shape-Stabilized Phase Change Materials by Expanded Graphite and Carbon Nanotube

Liu

Yang

2017

Applied Sciences

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“…Guo et al [6] showed that paraffin/ graphite foam composite can be considered as suitable candidates for latent heat thermal energy storage device. Large effort has been recently done on open cell metallic foams (copper, aluminium) [7][8][9][10][11][12][13][14]. The phase change behaviour of paraffin saturated in porous foams has been intensively investigated by experimental and numerical approaches.…”

Section: Introductionmentioning

confidence: 99%

Closed Cell Aluminium Foams with Phase Change Material

Kováčik¹,

Španielka²,

Dvorák³

et al. 2017

METF

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Abstract. Closed cell aluminium foam samples and panels with phase change material (PCM) infiltrated in vacuum were investigated. The utilization of PCMs in larger volumes is strongly limited because of its low thermal conductivity in liquid state. However, porous structure of aluminium foam allows to absorb or to dissipate very homogenously latent heat at almost constant temperature if PCMs with phase change at the temperature range between 4°C and 28 °C are used inside of foam. Therefore the degree of filling of closed cell aluminium foams with PCM material was investigated. It was shown that it is possible to fill sufficient amount of pores with PCM. Further, aluminium foam panels with PCM were tested for heating/cooling applications in buildings. It was confirmed, that such foam panels provide an excellent alternative for large built-in ceiling radiators for efficient heating or cooling of rooms using low potential energy resources. These features of foam panels allow significantly reduce energy consumption of heating/air conditioning systems of future zero energy buildings.

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“…Kopanidis et al [10] analyzed the relationship between the surface thermal conductivity of copper foam and the fluid pressure drop using numerical methods; the results indicated that the copper foam could achieve good thermal conductivity with a small fluid pressure drop. Xiao et al [11] made composite of copper foam/paraffin to improve the thermal conductivity, and found its equivalent thermal conductivity was nearly 15 times larger than that of pure paraffin. Li et al [12] also investigated the effect of the foam morphology parameters such as porosity, pore size on the wall temperature of the phase-change energy storage system.…”

Section: Introductionmentioning

confidence: 99%

Numerical and Experimental Studies on the Heat Transfer Performance of Copper Foam Filled with Paraffin

Zheng

Wang

2017

Energies

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Abstract:The pore-scale numerical works on the effective thermal conductivity and melting process of copper foam filled with paraffin, and a phase-change material (PCM) with low thermal conductivity, were conducted by utilizing the two-dimensional (2D) hexahedron Calmidi-Mahajan (C-M) model and the three-dimensional (3D) dodecahedron Boomsma-Poulikakos (B-P) model. The unidirectional heat transfer experiment was established to investigate the effective thermal conductivity of the composite. The simulation results of the effective thermal conductivity of the composite in 2D C-M model were 6.93, 5.41, 4.22 and 2.75 W/(m·K), for porosity of 93%, 95%, 96% and 98% respectively, while the effective thermal conductivity of the composite in 3D B-P model were 7.07, 5.24, 3.07 and 1.22 W/(m·K). The simulated results were in agreement with the experimental data obtained for the composite. It was found that the copper foam can effectively enhance the thermal conductivity of the paraffin, i.e., the smaller the porosity of copper foam, the higher the effective thermal conductivity of the composite. In addition, the Fluent Solidification/Melting model was applied to numerically investigate the melting process of the paraffin in the pore. Lastly, the solid-liquid interface development, completely melted time and temperature field distribution of paraffin in the pore of copper foam were also discussed.

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Preparation and thermal characterization of paraffin/metal foam composite phase change material

Cited by 500 publications

References 28 publications

Synergistically-Enhanced Thermal Conductivity of Shape-Stabilized Phase Change Materials by Expanded Graphite and Carbon Nanotube

Synergistically-Enhanced Thermal Conductivity of Shape-Stabilized Phase Change Materials by Expanded Graphite and Carbon Nanotube

Closed Cell Aluminium Foams with Phase Change Material

Numerical and Experimental Studies on the Heat Transfer Performance of Copper Foam Filled with Paraffin

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