Mixed mill-heating fabrication and thermal energy storage of diatomite/paraffin phase change composite incorporated gypsum-based materials

Liu, Zhiyong; Hu, Dan; Lv, Henglin; Zhang, Yunsheng; Wu, Fan; Shen, Dayong; Fu, Pengchen

doi:10.1016/j.applthermaleng.2017.02.057

Cited by 35 publications

(9 citation statements)

References 20 publications

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“…The results showed that the heat-release rate of the phase change composite material decreased by 28% and the thermal efficiency improved by 12%-15% when the volume fraction of nanocopper was 0.1%. Porous sorption materials, such as perlite, diatomite, and montmorillonite [9][10][11][12][13] , are commonly used as the matrix material to prepare phase change composite materials with paraffin. Pincemin [14] et al prepared paraffin/graphite phase change energy storage composite materials using expanded graphite adsorption on paraffin.…”

Section: Introductionmentioning

confidence: 99%

Paraffin/red mud phase change energy storage composite incorporated gypsum-based and cement-based materials: Microstructures, thermal and mechanical properties

Zhang

et al. 2019

Journal of Hazardous Materials

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In this study, paraffin/red mud phase change energy storage composites were fabricated at 4 mix proportions with paraffin to red mud ratios of 0.4:0.6, 0.45:0.55, 0.5:0.5, and 0.55:0.45 by a mixed mill-heating method. Scanning electron microscopy (SEM) and Fourier transform infrared (FT-IR) results reveal that paraffin flows well into red mud pores and has good compatibility. The differential scanning calorimetry (DSC) results reveal that the melting temperatures of the paraffin/red mud phase change energy storage composite vary from 75℃ to 85℃, and the latent heat 2 value is approximately 25~40J/g. High thermal stability is observed by the thermogravimetric analysis (TG) method. The Brunauer Emmett Teller (BET) isotherms, laser particle sizer, X-ray diffraction analysis (XRD), and laser Raman spectrograph (LRS) show that the phase change energy storage composite does not produce a new material from the raw materials and that the material has a stable performance. Furthermore, the paraffin/red mud phase change energy storage composite was incorporated into the cement-based and gypsum-based materials at 10%, 20%, and 30% weight. The heat storage performance can be improved remarkably with an increase in the addition of phase change energy storage composite replacement. The compressive strength change is minimal with the addition of 10% and 20%, and the compressive strength decreases by nearly 40% with the addition of 30%. The paraffin/red mud phase change energy storage composite has a large influence on the flexural strength.

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Section: Introductionmentioning

confidence: 99%

Paraffin/red mud phase change energy storage composite incorporated gypsum-based and cement-based materials: Microstructures, thermal and mechanical properties

Zhang

et al. 2019

Journal of Hazardous Materials

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“…Different organic and inorganic PCMs were used in PCM/diatomite composites, such as stearic acid, palm oil, palmitic acid‐capric acid eutectic mixture, decanoic acid, dodecanoic acid, eutectic mixtures of hexadecanoic acid and octadecanoic acid, polyethylene glycol, octadecane, potassium nitrate, sodium sulfate, lithium nitrate, sodium nitrate, and magnesium nitrate hexahydrate . However, the most widely used PCM is paraffin …”

Section: Introductionmentioning

confidence: 99%

“…40 However, the most widely used PCM is paraffin. 10,11,18,[41][42][43] To improve the absorbability, purity, and other properties, researchers have modified diatomite samples with different methods before use. 6 Calcination is the most common method for modification of diatomite before compounding to increase the PCM ratio in the composites.…”

Section: Introductionmentioning

confidence: 99%

Development of pentadecane/diatomite and pentadecane/sepiolite nanocomposites fabricated by different compounding methods for thermal energy storage

2019

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Summary Global warming is one of the most important consequences of excess energy consumption. Phase change materials (PCMs) have prominent advantages in thermal energy storage owing to their high latent heat capacities and small temperature variations during the phase change process. However, leakage is a major problem that limits the use of PCMs. Leakage may occur in encapsulated PCMs or in composites where the PCM is attached to the surface of a supporting material or within the pores of that material. In this study, pentadecane/diatomite and pentadecane/sepiolite nanocomposites were fabricated by using unmodified and microwave‐irradiated diatomite and sepiolite samples and by using different compounding processes, such as direct impregnation, vacuum impregnation, and ultrasonic‐assisted impregnation methods. The microstructures and the chemical and thermal properties of the composites were characterized by scanning electron microscopy, Fourier‐transform infrared spectroscopy, and differential scanning calorimetry. Subsequently, the thermal reliability and stability and the thermal conductivity of the PCM composites were also investigated. A melting temperature of 9.25°C and a latent heat capacity of 58.73 J/g were determined for the pentadecane/diatomite composite that was prepared with the direct impregnation method using a microwave‐treated diatomite sample. The pentadecane/sepiolite composite prepared in the melting temperature range 7.98°C to 8.53°C and latent heat capacity range 41.05 to 46.02 J/g. The results of the thermal analysis indicate that fabricated diatomite‐based or sepiolite‐based PCM composites have good potential as thermal energy storage materials.

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“…Obviously, the second one has remarkable advantages of low cost, simple operation, unique pore structure, and easily available materials [22]. As a result, different porous materials were employed to prepare FSPCMS, thereinto, clay mineral-based FSPCMs were extensively studied such as expanded graphite [24,25], perlite [26], kaolinite [27,28], diatomite [29,30], and meteorite [31]. A large number of research results demonstrated that by adsorbing PCM into porous material to fabricate FSPCMs, the liquid leakage problems can be effectively solved [32,33].…”

Section: Introductionmentioning

confidence: 99%

Fabrication and Thermal Properties of Capric Acid/Calcinated Iron Tailings/Carbon Nanotubes Composite as Form-Stable Phase Change Materials for Thermal Energy Storage

Liu

Zhang

et al. 2019

Minerals

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In this study, a novel form-stable phase change material (FSPCM) consisting of calcination iron tailings (CIT), capric acid (CA), and carbon nanotubes (CNT) was prepared using a simple direct melt impregnation method, and a series of tests have been carried out to investigate its properties. The leakage tests showed that CA can be retained in CIT with a mass fraction of about 20 wt.% without liquid leakage during the phase change process. Moreover, the morphology, chemical structure, and thermal properties of the fabricated composite samples were investigated. Scanning electron microscope (SEM) micrographs confirmed that CIT had a certain porous structure to confine CA in composites. According to the Fourier transformation infrared spectroscope (FTIR) results, the CA/CIT/CNT FSPCM had good chemical compatibility. The melting temperature and latent heat of CA/CIT/CNT by differential scanning calorimeter (DSC) were determined as 29.70 • C and 22.69 J/g, respectively, in which the mass fraction of CIT and CNT was about 80 wt.% and 5 wt.%, respectively. The thermal gravity analysis (TGA) revealed that the CA/CIT/CNT FSPCM showed excellent thermal stability above its working temperature. Furthermore, the melting and freezing time of CA/CIT/CNT FSPCM doped with 5 wt.% CNT reduced by 42.86% and 54.55% than those of pure CA, and it showed better heat transfer efficiency. Therefore, based on the above analyses, the prepared CA/CIT/CNT FSPCM is not only a promising candidate material for the application of thermal energy storage in buildings, but it also provides a new approach for recycling utilization of iron tailings.

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Mixed mill-heating fabrication and thermal energy storage of diatomite/paraffin phase change composite incorporated gypsum-based materials

Cited by 35 publications

References 20 publications

Paraffin/red mud phase change energy storage composite incorporated gypsum-based and cement-based materials: Microstructures, thermal and mechanical properties

Paraffin/red mud phase change energy storage composite incorporated gypsum-based and cement-based materials: Microstructures, thermal and mechanical properties

Development of pentadecane/diatomite and pentadecane/sepiolite nanocomposites fabricated by different compounding methods for thermal energy storage

Fabrication and Thermal Properties of Capric Acid/Calcinated Iron Tailings/Carbon Nanotubes Composite as Form-Stable Phase Change Materials for Thermal Energy Storage

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