Thermal properties and stabilities of the eutectic mixture: 1,6-hexanediol/lauric acid as a phase change material for thermal energy storage

Han, Lipeng; Ma, Guixiang; Xie, Shaolei; Sun, Jinhe; Jia, Yongzhong; Jing, Yan

doi:10.1016/j.applthermaleng.2017.01.082

Cited by 51 publications

(23 citation statements)

References 32 publications

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“…The prepared material shows a negligible change in melting point and LHF even after 3000 thermal cycles. Han et al . prepared a eutectic mixture of 1,6‐hexanediol/lauric acid as a PCM with a melting point of (36±0.71) °C and LHF of (177.11±7.93) J g −1 .…”

Section: Introductionmentioning

confidence: 99%

Preparation, Thermophysical Studies, and Corrosion Analysis of a Stable Capric Acid/Cetyl Alcohol Binary Eutectic Phase Change Material for Cold Thermal Energy Storage

Chinnasamy

Saritha

2018

Energy Tech

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This study focuses on the preparation, thermophysical properties, and corrosion analysis of a stable capric acid/cetyl alcohol eutectic phase‐change material (PCM) for application in the thermal comfort of buildings. Differential scanning calorimetry is used to investigate the thermal properties of the prepared eutectic PCM, and the results show that the eutectic composition of 70 % capric acid and 30 % cetyl alcohol was suitable for low‐temperature thermal energy storage as it had melting and freezing temperatures of 22.89 and 11.97 °C, respectively. The latent heats of melting and freezing of the eutectic PCM are 144.92 and 145.85 J g−1, respectively. The changes in the melting point and latent heat of the eutectic mixtures over continuous charging/discharging cycles are presented. The accelerated thermal cycling test and FTIR spectra show that the prepared eutectic PCM has a good thermal stability over 1000 thermal cycles. Moreover, corrosion compatibility tests for Cu, Al, and stainless steel 316 samples with the prepared eutectic PCM are discussed, and recommendations for the use of the PCM in the operational environment are presented.

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Section: Introductionmentioning

confidence: 99%

Preparation, Thermophysical Studies, and Corrosion Analysis of a Stable Capric Acid/Cetyl Alcohol Binary Eutectic Phase Change Material for Cold Thermal Energy Storage

Chinnasamy

Saritha

2018

Energy Tech

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“…Chemical degradation of PCMs is reported in several papers under the name of thermal stability studies . In all of them, TGAs are performed under inert atmosphere (N 2 or Ar) at a single heating rate (normally 10°C/min) in order to obtain the temperature limit for the beginning of PCM degradation.…”

Section: Service Conditions and Degradation Factorsmentioning

confidence: 99%

“…According to this review, most tested PCMs are intended for storage applications at temperatures below 100°C. Those PCMs include pure substances, eutectic mixtures, and composites that undergo either solid‐liquid or solid‐solid phase transitions. In contrast, only few stability studies have been found for PCMs intended to temperature applications above 100°C.…”

Section: Introductionmentioning

confidence: 99%

“…In order to perform cycling tests, some authors used differential scanning calorimetry (DSC), whereas the majority used set‐ups adapted and/or designed on purpose. Those set‐ups included thermostatic chambers, thermal water baths, electric hot plates with temperature control, weathering chambers, ovens with controlled heating, and, in few cases, also with a cooling control . The advantage of using a DSC apparatus for thermal cycling is that phase change temperature ( T ph‐ch ) and calculated enthalpy (Δ H ph‐ch ) are recorded directly for each cycle, so that their evolution can be monitored without interrupting the test or removing the sample.…”

Section: Introductionmentioning

confidence: 99%

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Development of a new methodology for validating thermal storage media: Application to phase change materials

Bayón

Rojas

2019

Int J Energy Res

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Summary Long‐term stability and long‐term performance of thermal storage media are a key issue that should be thoroughly analysed when developing storage systems. However, no testing protocol or guideline exists up to now for validating storage media, so that authors apply their own criteria, not only for designing testing procedures but also for predicting the material behaviour under long‐term operation. This paper aims to cover this gap by proposing a methodology for validating thermal storage media; in particular, phase change materials (PCMs). This methodology consists of different stages that include PCM characterization, preliminary assessment tests, and accelerated life testing. For designing the accelerated life tests, lifetime relationship models have to be obtained in order to predict PCM long‐term behaviour under service conditions from shorter tests performed under stress conditions. The approach followed in this methodology will be valid for materials to be used as sensible or thermochemical storage media, too.

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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%

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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Thermal properties and stabilities of the eutectic mixture: 1,6-hexanediol/lauric acid as a phase change material for thermal energy storage

Cited by 51 publications

References 32 publications

Preparation, Thermophysical Studies, and Corrosion Analysis of a Stable Capric Acid/Cetyl Alcohol Binary Eutectic Phase Change Material for Cold Thermal Energy Storage

Preparation, Thermophysical Studies, and Corrosion Analysis of a Stable Capric Acid/Cetyl Alcohol Binary Eutectic Phase Change Material for Cold Thermal Energy Storage

Development of a new methodology for validating thermal storage media: Application to phase change materials

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

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