Preparation and thermal properties of n–octadecane/stearic acid eutectic mixtures with hexagonal boron nitride as phase change materials for thermal energy storage

Su, Di; Jia, Yuting; Alva, Guruprasad; Tang, Fang; Fang, Guiyin

doi:10.1016/j.enbuild.2016.09.022

Cited by 84 publications

(18 citation statements)

References 29 publications

(33 reference statements)

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“…The enhancement in the thermal conductivity is efficient for storing/release capacity of HPCM. For TES system, researchers [34][35][36][37][38][39][40][41][42][43][44][45] studied the thermal characteristics of the prepared HPCM and then concluded that the prepared HPCM is either efficient enough to store TES or not. However, from the literature studied it has been revealed that almost all the HPCM have increased the thermal conductivity of base PCM and hence the TES capacity.…”

Section: Discussionmentioning

confidence: 99%

“…y Selection of proper PCM and particle to create HPCM is very important as it holds a key role in the shape stability of colloidal mixture, and enhancement in the thermo physical properties of the base PCM. y Numerous researchers [34][35][36][37][38][39][40][41][42][43][44][45]91] synthesized HPCM for TES system and studied their thermal characteristics. They surmised that the prepared composites have improved the thermal conductivity of base PCM and hence the TES capacity.…”

Section: Discussionmentioning

confidence: 99%

“…Su et al [43] added 10 wt.% hexagonal boron nitride (HBN) to the mixture of n-octadecane and stearic acid to prepare HPCM composite. The results revealed that by adding HBN the thermal conductivity of CPCM was emhanced by 8% in solid state and 16.7% in melting state.…”

Section: Thermal Energy Storagementioning

confidence: 99%

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Thermal applications of hybrid phase change materials: A critical review

2020

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Phase change materials (PCM) with their high latent heat capacity have a great ability to store energy during their phase change process. The PCM are renowned for their applications in solar and thermal energy storage systems for the purpose of heating and cooling. However, one of the major drawbacks of PCM is their low thermal conductivity due to which their charging and discharging time reduces along with the reduction in energy storage capacity. This reduction in the energy storage capacity of PCM can be improved by producing organic-inorganic hybrid form-stable PCM, with the combination of two or more PCM together to increase their energy storage capacity. Nanoparticles that possess high thermal conductivity are also doped with these hybrid PCM (HPCM)to improve the effectiveness of thermal conductivity. This paper presents a short review on the applications of HPCM in energy storage and building application. Apart from this a short section of applications of composite PCM (CPCM) is also reviewed with discussions made at the end of each section. Results from the past literature depicted that the application of these HPCM and CPCM enhanced the energy storage capacity and thermal conductivity of the base PCM and selection of a proper hybrid material plays an essential role in their stability. It is presumed that this study will provide a sagacity, to the readers, to investigate their thermophysical properties and other essential applications.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

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Thermal applications of hybrid phase change materials: A critical review

2020

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“…Inorganic PCMs are inexpensive compared with organic PCMs, nonflammable, and having high thermal conductivity and latent heat of fusion. 14 Organic-organic eutectic PCMs can be made from mixtures of paraffin-paraffin, 15-18 paraffin-fatty acid, [19][20][21][22] fatty acid-fatty acid, 23-26 fatty acid-fatty alcohol, [27][28][29][30] and fatty acid ester-fatty acid ester. 5 The super-cooling and phase segregation of inorganic PCMs could be improved by adding nucleating and thickening agents; however, these agents decrease their latent heat significantly.…”

Section: Introductionmentioning

confidence: 99%

“…The principal advantages are high phase change enthalpy, long-term stability, and ease of impregnating into porous solid support due to their high surface tension and good chemical compatibility. 14 Organic-organic eutectic PCMs can be made from mixtures of paraffin-paraffin, [15][16][17][18] paraffin-fatty acid, [19][20][21][22] fatty acid-fatty acid, [23][24][25][26] fatty acid-fatty alcohol, [27][28][29][30] and fatty acid ester-fatty acid ester. [31][32][33][34][35] Generally, suitable PCMs for building applications must have specific thermal properties such as having a melting point in the range of the human comfort zone (20°C-25°C) and a high latent heat of fusion.…”

Section: Introductionmentioning

confidence: 99%

Binary mixtures of fatty alcohols and fatty acid esters as novel solid‐liquid phase change materials

et al. 2019

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Summary The discovery of new eutectic phase change materials (PCMs) will overcome the current PCM challenges such as nonbiodegradability, super‐cooling, and limited thermal stability. This paper reports on the development of new bio‐based PCMs composed of binary mixtures of fatty acid esters and fatty alcohols at their eutectic compositions, which provide potential solid‐liquid PCMs for building applications. Six binary systems, namely 1‐dodecanol (DD) + methyl stearate (MES), DD + methyl palmitate (MEP), DD + methyl laurate (MEL), 1‐tetradecanol (TD) + MES, TD + MEP, and TD + MEL were prepared and their thermal behaviours were deliberated by differential scanning calorimetry (DSC), thermogravimetric analysis (TGA), long‐term thermal stability test, and mass loss analysis. Amongst the studied systems, phase change transition temperature and latent heat of fusion of the eutectic mixtures of DD‐MES, DD‐MEP, TD‐MES, and TD‐MEP were found to be suitable for the building application with values of 22.46°C/201.91 J/g, 20.34°C/224.45 J/g, 32.05°C/209.38 J/g, and 26.72°C/210.15 J/g, respectively. The average degree of super‐cooling for all PCMs was below 2°C, and no significant changes in thermophysical properties of the developed PCMs were observed after 1000 thermal cycles.

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Examining the Thermophysical Impact of Low Concentrated Nanoparticles Hexagonal Boron Nitride Embedded in Phase Change Material for Photo to Thermal Energy Conversion

Bhutto,

Pandey,

Saidur

et al. 2024

Energy Tech

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Phase change materials (PCMs) have garnered substantial interest for their use in thermal energy storage. However, restricted thermal conductivity of PCMs hinders their effectiveness in application. The objective of this work is to integrate hexagonal boron nitride (h‐BN) in low concentration with RT38 PCM for thermophysical characterization and photo to thermal energy conversion. The composites are prepared by adding 0.03–0.07 weight percent (wt%) nanoparticles with RT38 PCM through two‐step technique. As per the results, prepared samples remain chemically and thermally stable. Besides, addition of 0.05 wt% of h‐BN nanoparticles with PCM (RT38‐0.05) enhances thermal conductivity to 43%. Additionally, latent heat of melting remains at 137 Jg−1 for 0.05 wt% nanoparticle integrated nanocomposite in comparison to base 140 Jg−1 with slight variation in its melting temperatures. Further, PCM and nanocomposites exhibit zero weight degradation on thermal‐stability analysis up to 160 °C. The research examines thermal energy storage behaviour of base PCM and RT38‐0.05 nanocomposite by applying 800 Wm−2 irradiations. The analysis shows that RT38‐0.05 nanocomposite reaches 49 °C in 9 min, whereas base PCM achieves 43 °C. Thus, the integration of h‐BN nanoparticles in PCM results in improved thermophysical properties and greater conversion of photo to thermal energy.

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Preparation and thermal properties of n–octadecane/stearic acid eutectic mixtures with hexagonal boron nitride as phase change materials for thermal energy storage

Cited by 84 publications

References 29 publications

Thermal applications of hybrid phase change materials: A critical review

Thermal applications of hybrid phase change materials: A critical review

Binary mixtures of fatty alcohols and fatty acid esters as novel solid‐liquid phase change materials

Examining the Thermophysical Impact of Low Concentrated Nanoparticles Hexagonal Boron Nitride Embedded in Phase Change Material for Photo to Thermal Energy Conversion

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