Investigation of the anisotropic thermal properties of the cuboid-like Ca(NO3)2-NaNO3/EG composite

Ren, Yaoyu; Xu, Chao; Tian, Ziqian; Wang, Tieying; Liao, Zhirong

doi:10.1016/j.renene.2021.03.016

Cited by 6 publications

(3 citation statements)

References 34 publications

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“…This effectively promotes the large-scale development of solar energy utilization technology and positively contributes to decarbonation. 8,9 Calcium-cycle energy storage is a promising thermochemical energy storage process in the supercritical carbon dioxide power generation cycle of the third generation of concentrated solar power plants. 10−12 Over the past 20 years, calciumcycling technology has undergone rapid development, and several studies have been conducted on the use of calciumbased materials for CO 2 absorption and thermochemical energy storage.…”

Section: Introductionmentioning

confidence: 99%

“…If this cost reduction trend continues, the cost of renewable energy will be 11% lower than that of fossil fuel energy by 2030. , The utilization of solar energy is intermittent, and energy storage technology can convert it into different forms of energy for storage and a controllable continuous release when needed. This effectively promotes the large-scale development of solar energy utilization technology and positively contributes to decarbonation. , …”

Section: Introductionmentioning

confidence: 99%

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Analysis of the Variable Influence and Energy Storage Performance in Preparation of Solar Energy Storage Materials via Modification of Carbide Slag Using MnO₂ through Wet Doping

Gao,

Liu,

Zhang

et al. 2024

Ind. Eng. Chem. Res.

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Carbide slag is a common industrial waste with a high calcium content. Herein, a new type of calcium-based absorbent was prepared via a wet process using calcium carbide slag as the calcium source and MnO 2 as the dopant. The results showed that when the concentration of ethanol was 60% and the molar ratio of calcium oxide, citric acid, and MnO 2 was 1:1.25:0.05, the carbonation conversion of the absorbent reached the highest conversion rate of 77%. After 50 carbonation/calcination cycles, the carbonation conversion of the modified absorbent was 11% higher than that of the unmodified pure calcium carbide slag. The synergistic effect of controlling the grain size of the absorbent and using citric acid to strengthen the structure was found to inhibit agglomeration and collapse of the composite absorbent, thus improving cycle stability. Through a range method, it was found that among the variables considered in this study, the ethanol concentration had the strongest influence on the carbonation conversion of composite materials. Mn 2 O 3 is formed when MnO 2 is doped in calcium carbide slag after calcination, which not only strengthens the surface structure of the composite absorbent but also enhances the optical absorption characteristics of the absorbent.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Analysis of the Variable Influence and Energy Storage Performance in Preparation of Solar Energy Storage Materials via Modification of Carbide Slag Using MnO₂ through Wet Doping

Gao,

Liu,

Zhang

et al. 2024

Ind. Eng. Chem. Res.

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“…On the other hand, form-stable composite techniques, [31][32][33] including melt impregnation, [34] cold pressed sintering [35] and sol-gel method, [36] aim to enhance the mechanical strength and stability of PCMs by combining them with stabilized matrix materials. The commonly used matrix materials at high temperatures include carbon materials (expanded graphite, [37] graphite foam [38] ), clay mineral materials (diatomite, [39] expanded vermiculite, [40] expanded perlite [41] ), and other materials (MgO, [42] SiO 2 , [43] mullite [44] and Ca(OH) 2 [45] ). However, the distribution and movement of PCM particles within the composites during thousands of thermal cycles may result in heterogeneous thermal stresses during the phase change processes, affecting the performance and reliability of the composites.…”

Section: Introductionmentioning

confidence: 99%

A Dual Encapsulation Strategy for High‐Temperature Micro PCM Particles with High Cyclic Durability

Wang,

Tao,

et al. 2024

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Addressing critical issues such as high‐temperature corrosion, leakage, degradation, and subpar cyclic performance is imperative for phase change materials (PCMs), prompting the development of appropriate encapsulation techniques to surmount these challenges. In this study, a dual encapsulation strategy is proposed for high‐temperature micro PCM particles. Al–Si core is microencapsulated via the “solvent evaporation‐heating curing” method. Subsequently, TiO2 is employed as the skeleton material for form‐stable encapsulation of PCM microcapsules by “cold pressed sintering”. Detailed analysis of the crystalline phase transformation mechanism in the sintering synthesis pathway of TiO2 underscore its potential as a robust structural material with exceptional thermal stability. Furthermore, the incorporation of hexagonal boron nitride (hBN) results in a substantial enhancement of the thermal conductivity of the composites, increasing by 121.1–131.3%. The prepared form‐stable phase change microcapsules (FSPCMs) are subjected to 5000 thermal cycles in the air atmosphere. There is no observed PCM leakage or composite ruptures in the FSPCM. Moreover, the oxidized mass gain is merely 3.3%, signifying exceptional oxidation resistance. Thermophysical analysis indicates that FSPCM can retain 91.3% of the enthalpy after 2000 cycles, with over 80% preservation after 5000 cycles, underscoring its remarkable cyclic thermal durability.

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A review: Progress and perspectives of research on the functionalities of phase change materials

Xu¹,

Zhang²,

Zou³

2022

Journal of Energy Storage

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Investigation of the anisotropic thermal properties of the cuboid-like Ca(NO3)2-NaNO3/EG composite

Cited by 6 publications

References 34 publications

Analysis of the Variable Influence and Energy Storage Performance in Preparation of Solar Energy Storage Materials via Modification of Carbide Slag Using MnO₂ through Wet Doping

Analysis of the Variable Influence and Energy Storage Performance in Preparation of Solar Energy Storage Materials via Modification of Carbide Slag Using MnO₂ through Wet Doping

A Dual Encapsulation Strategy for High‐Temperature Micro PCM Particles with High Cyclic Durability

A review: Progress and perspectives of research on the functionalities of phase change materials

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Investigation of the anisotropic thermal properties of the cuboid-like Ca(NO3)2-NaNO3/EG composite

Cited by 6 publications

References 34 publications

Analysis of the Variable Influence and Energy Storage Performance in Preparation of Solar Energy Storage Materials via Modification of Carbide Slag Using MnO2 through Wet Doping

Analysis of the Variable Influence and Energy Storage Performance in Preparation of Solar Energy Storage Materials via Modification of Carbide Slag Using MnO2 through Wet Doping

A Dual Encapsulation Strategy for High‐Temperature Micro PCM Particles with High Cyclic Durability

A review: Progress and perspectives of research on the functionalities of phase change materials

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Analysis of the Variable Influence and Energy Storage Performance in Preparation of Solar Energy Storage Materials via Modification of Carbide Slag Using MnO₂ through Wet Doping

Analysis of the Variable Influence and Energy Storage Performance in Preparation of Solar Energy Storage Materials via Modification of Carbide Slag Using MnO₂ through Wet Doping