The anti-supercooling effect of surface-modified nano-scaled SiO<sub>2</sub>in hydrated salts phase transition system

Wu, Xinke; Wang, Yihai; Sun, Rong; Lai, Maobai; Du, Ruxu; Zhang, Zhijun

doi:10.1088/1742-6596/188/1/012046

Cited by 18 publications

(9 citation statements)

References 12 publications

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“…Excessive supercooling observed with less than 1 wt% borax and with above 10 wt% affected melting phase transition stability of the mixture 54 . Surface effect of three nanomaterials (aerosol SiO 2 (12 nm), RNS‐A SiO 2 (40 nm) and liquid phase SiO 2 (50 nm)) with PCMs like Na 2 S 2 O 3 ·5H 2 O, Na 2 SO 4 ·10H 2 O, and Na 2 HPO 4 ·12H 2 O were reported by Wu et al 55 Aerosol SiO 2 among other nano‐particles like RNS‐A SiO 2 and liquid phase SiO 2 provides better results for Na 2 SO 4 ·10H 2 O. 2 wt% aerosol SiO 2 found to be effective in reducing supercooling for Na 2 HPO 4 ·12H 2 O, and Na 2 S 2 O 3 ·5H 2 O 55 .…”

Section: Problems and Possible Solutions For Salt Hydrates For Tes Symentioning

confidence: 79%

Inorganic salt hydrate for thermal energy storage application: A review

Purohit

Sistla

2020

Energy Storage

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Salt hydrates are one of the most common inorganic compounds that are used as phase change material (PCM). These are available for a wide range of phase transition temperature for thermal energy storage (TES) application. They have some most desired properties for TES applications like high latent heat value, good thermal conductivity, nonexpensive, and were nonflammable. Besides these, due to the undesirable properties like phase segregation, supercooling, and corrosion to the containers, this PCM not recommended for TES application. To mitigate these issues and to make salt hydrates suitable in TES application, much research has been carried out in past years. This main highlight of this article is to provide a comprehensive overview of the use of salt hydrates, their applications and summarize the research outcomes reported by various researchers to every issue for its TES application. This summarized information will be useful to those who are interested to work on this research area. Along with this literature focuses on the advantages, disadvantages, and mechanism of salt hydrates for TES system during its thermal cycle process.

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Section: Problems and Possible Solutions For Salt Hydrates For Tes Symentioning

confidence: 79%

Inorganic salt hydrate for thermal energy storage application: A review

Purohit

Sistla

2020

Energy Storage

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“…The addition of silica nanoparticles with diameters between 12 and 50 nm on the thermal properties of Na 2 SO 4 ·10H 2 O, Na 2 HPO 4 ·12H 2 O, and Na 2 S 2 O 3 ·5H 2 O was investigated through thermal history and calorimetry [ 179 ]. The addition of up to 7% nanoparticles reduced the supercooling of the hydrated salts crystallization.…”

Section: Phase Change Materials Containing Porous Silica Matrices mentioning

confidence: 99%

A Review of Composite Phase Change Materials Based on Porous Silica Nanomaterials for Latent Heat Storage Applications

et al. 2021

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Phase change materials (PCMs) can store thermal energy as latent heat through phase transitions. PCMs using the solid-liquid phase transition offer high 100–300 J g−1 enthalpy at constant temperature. However, pure compounds suffer from leakage, incongruent melting and crystallization, phase separation, and supercooling, which limit their heat storage capacity and reliability during multiple heating-cooling cycles. An appropriate approach to mitigating these drawbacks is the construction of composites as shape-stabilized phase change materials which retain their macroscopic solid shape even at temperatures above the melting point of the active heat storage compound. Shape-stabilized materials can be obtained by PCMs impregnation into porous matrices. Porous silica nanomaterials are promising matrices due to their high porosity and adsorption capacity, chemical and thermal stability and possibility of changing their structure through chemical synthesis. This review offers a first in-depth look at the various methods for obtaining composite PCMs using porous silica nanomaterials, their properties, and applications. The synthesis and properties of porous silica composites are presented based on the main classes of compounds which can act as heat storage materials (paraffins, fatty acids, polymers, small organic molecules, hydrated salts, molten salts and metals). The physico-chemical phenomena arising from the nanoconfinement of phase change materials into the silica pores are discussed from both theoretical and practical standpoints. The lessons learned so far in designing efficient composite PCMs using porous silica matrices are presented, as well as the future perspectives on improving the heat storage materials.

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“…For instance, Borax is always regarded as the most suitable nucleating agents for Na 2 SO 4 ·10H 2 O, which can reduce supercooling of Na 2 SO 4 ·10H 2 O from 15 • C to about 2~3 • C [22]. Wu et al [23] investigated the surface effects of interaction between salt hydrates and nano-particles. Three nano-particles of aerosol SiO 2 , RNS-A SiO 2 and liquid phase SiO 2 were compared by adding them to Na 2 SO 4 ·10H 2 O.…”

Section: Supercooling Of Salt Hydratesmentioning

confidence: 99%

Inorganic Salt Hydrate for Thermal Energy Storage

et al. 2017

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Using phase change materials (PCMs) for thermal energy storage has always been a hot topic within the research community due to their excellent performance on energy conservation such as energy efficiency in buildings, solar domestic hot water systems, textile industry, biomedical and food agroindustry. Several literatures have reported phase change materials concerning various aspects. Among these materials, salt hydrates are worthy of exploring due to their high-energy storage density, rational price, multiple sources and relatively good thermal conductivity. This paper reviews the present state of salt hydrates PCMs targeting classification, properties, defects, possible solutions as well as their idiographic features which are suitable for applications. In addition, new trends of future research are also indicated.

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The anti-supercooling effect of surface-modified nano-scaled SiO₂in hydrated salts phase transition system

Cited by 18 publications

References 12 publications

Inorganic salt hydrate for thermal energy storage application: A review

Inorganic salt hydrate for thermal energy storage application: A review

A Review of Composite Phase Change Materials Based on Porous Silica Nanomaterials for Latent Heat Storage Applications

Inorganic Salt Hydrate for Thermal Energy Storage

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The anti-supercooling effect of surface-modified nano-scaled SiO2in hydrated salts phase transition system

Cited by 18 publications

References 12 publications

Inorganic salt hydrate for thermal energy storage application: A review

Inorganic salt hydrate for thermal energy storage application: A review

A Review of Composite Phase Change Materials Based on Porous Silica Nanomaterials for Latent Heat Storage Applications

Inorganic Salt Hydrate for Thermal Energy Storage

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The anti-supercooling effect of surface-modified nano-scaled SiO₂in hydrated salts phase transition system