Preparation and thermal properties of SAT-CMC-DSP/EG composite as phase change material

Mao, Jinfeng; Hou, Pumin; Liu, Rongrong; Chen, Fei; Dong, Xian‐Zhe

doi:10.1016/j.applthermaleng.2017.03.097

Cited by 47 publications

(16 citation statements)

References 21 publications

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“…Possible methods of reducing or avoiding phase separation for incongruent melting materials were summarized in general in [1]: Mechanical stirring, rotating storage devices, adding the thickening agents [21][22][23] to hold the suspension of unsolved salt, adding excess water to solve the sodium acetate salt completely and using chemical ways to make the materials congruent and so on. Kong et al [20] investigated the phase separation problem of SAT from the heat content point of view.…”

Section: Methods Of Avoiding Phase Separationmentioning

confidence: 99%

Experimental investigations on phase separation for different heights of sodium acetate water mixtures under different conditions

Kong

Dannemand

Berg

et al. 2019

Applied Thermal Engineering

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Section: Methods Of Avoiding Phase Separationmentioning

confidence: 99%

Experimental investigations on phase separation for different heights of sodium acetate water mixtures under different conditions

Kong

Dannemand

Berg

et al. 2019

Applied Thermal Engineering

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“…This has been avoided by adding nucleation agents to the SAT mixture to start solidification with minimal supercooling during discharge [2] [11,12]. Several researchers look into developing PCM composites of SAT with thickening agents and nucleation agents for improving the PCMs performance in systems where supercooling is suppressed [13][14][15]. On the other hand, actively utilizing the supercooling gives the possibility to store energy over long periods without thermal loss in part of the storage period.…”

Section: Supercoolingmentioning

confidence: 99%

Porosity and density measurements of sodium acetate trihydrate for thermal energy storage

Dannemand

Delgado

Lázaro

et al. 2018

Applied Thermal Engineering

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Sodium acetate trihydrate (SAT) can be used as phase change material in latent heat storage with or without utilizing supercooling. The change of density between liquid to solid state leads to formation of cavities inside the bulk SAT during solidification. Samples of SAT which had solidified from supercooled state at ambient temperature and samples which had solidified with a minimal degree supercooled were investigated. The temperature dependent densities of liquid and the two types of solid SAT were measured with a density meter and a thermomechanical analyzer. The cavities formed inside samples of solid SAT, which had solidified after a high or minimal degree of supercooling, were investigated by X-ray scanning and computer tomography. The apparent density of solid SAT depended on whether it solidified from a supercooled state or not. A sample which solidified from a supercooled liquid contained 15% cavities and had a density of 1.26 g/cm 3 at 25 °C. SAT which had solidified with minimal supercooling contained 9% cavities and had a density of 1.34 g/cm 3 at 25 °C. The apparent densities of the solid SAT samples were significant lower than the value of solid SAT reported in literature of 1.45 g/cm 3. The density of liquid and supercooled SAT with extra water was also determined at different temperatures.

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“…Ye et al employed CaCl 2 ·6H 2 O/EG to fabricate the PCM panels for building envelope as a low‐cost PCM . Mao et al prepared a series of SAT‐CMC‐DSP/EG composite PCMs with different mass ratio of EG, and the thermal cycling test results indicated that samples show a good thermal reliability . Dannemand et al characterized thermal energy storage units with supercooled sodium acetate trihydrate .…”

Section: Introductionmentioning

confidence: 99%

Preparation and application of composite EG/Ba(OH)₂ ·8H₂ O form-stable phase change material for solar thermal storage

Han

Zhang

et al. 2019

Int J Energy Res

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Summary Composite expended graphite (EG)/Ba(OH)2·8H2O form‐stable phase change material (PCM) is prepared with porous adsorption method in this study to solve the problem of the leakage risk in the application process based on barium hydroxide octahydrate. In addition, the thermal properties and stability have been measured and verified. Thermal conductivity of each group composite material was enhanced by about two to four times, while the addition has little negative effect on the other properties. With microscopic features being characterized by scanning electron microscope (SEM), the experimental result demonstrates that the composite material with 7 wt% of EG is optimal to be a saturated state between two phases. After the thermal cyclings of 100, 300, and 500 times, thermal properties did not change dramatically, which can be used as an ideal material for solar thermal storage system within finite thermal cyclings. In order to simulate the operating condition of solar energy or waste heat storage, the composite material was encapsulated in the heat storage unit with pipe bundle, and heat storage/release experiences were performed to test the performance of the material and hot water supply. The results indicate that the composite material is qualified to storage and release sufficient heat. The experimental data can provide necessary technical reference for engineering design and effect prediction in practical application.

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Preparation and thermal properties of SAT-CMC-DSP/EG composite as phase change material

Cited by 47 publications

References 21 publications

Experimental investigations on phase separation for different heights of sodium acetate water mixtures under different conditions

Experimental investigations on phase separation for different heights of sodium acetate water mixtures under different conditions

Porosity and density measurements of sodium acetate trihydrate for thermal energy storage

Preparation and application of composite EG/Ba(OH)₂ ·8H₂ O form-stable phase change material for solar thermal storage

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Preparation and thermal properties of SAT-CMC-DSP/EG composite as phase change material

Cited by 47 publications

References 21 publications

Experimental investigations on phase separation for different heights of sodium acetate water mixtures under different conditions

Experimental investigations on phase separation for different heights of sodium acetate water mixtures under different conditions

Porosity and density measurements of sodium acetate trihydrate for thermal energy storage

Preparation and application of composite EG/Ba(OH)2 ·8H2 O form-stable phase change material for solar thermal storage

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Product

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Preparation and application of composite EG/Ba(OH)₂ ·8H₂ O form-stable phase change material for solar thermal storage