Wettability of eutectic NaLiCO3 salt on magnesium oxide substrates at 778 K

Li, Chuan; Li, Qi; Cao, Hui; Leng, Guanghui; Li, Yongliang; Wang, Li; Zheng, Lei; Ding, Yulong

doi:10.1016/j.apsusc.2018.02.082

Cited by 31 publications

(3 citation statements)

References 23 publications

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“…The requirement of a porous skeleton is not only an abundant porous structure but also good wettability between the skeleton and PCMs, which plays a very important role for the infiltration of molten PCMs. 44 Carbon materials such as expanded graphite (EP) carbon nanotubes (CNTs) are considered to be superior supporting skeletons due to high thermal conductivity, but the poor wettability with inorganic salt may result in serious PCM leakage. 45 Therefore, the wettability of liquid PCMs on a supporting skeleton at elevated temperatures is directly related to the heat storage and thermal stability of the composites.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

Novel Low-Cost Anorthite Porous Ceramic-Based Binary Chlorate High-Temperature Thermal Energy Storage Material: Preparation and Characterization

Liu

Zhang

et al. 2021

Energy Fuels

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This work creatively proposed novel, low-cost, anorthite porous ceramic (APC)-based eutectic NaCl-KCl salt composite phase-change materials (C-PCMs) by using industrial solid waste blast furnace slag (BFS) and fly ash (FA) as the main materials. The spontaneous infiltration method was applied in this study, and the prepared composites have a promising prospect in the field of high-temperature heat storage because of good thermal stability, high thermal conductivity, and low cost. It was found that stable anorthite ceramic phase, high porosity, and good mechanical properties could be obtained at the sintering temperature of 1150 °C. Good chemical compatibility between APC and NaCl-KCl even under high temperature was proved by X-ray diffraction (XRD) analysis. The melting temperature and enthalpy of the prepared NaCl-KCl/APC C-PCMs were measured as 655.6 °C and 79.6 J/g, respectively, by differential scanning calorimetry (DSC). The supercooling of the NaCl-KCl/APC C-PCMs was only 4.2 °C comparing to 9.6 °C for pure NaCl-KCl, which was beneficial to improve the stability and prolong the service life. The thermal conductivity of NaCl-KCl was significantly enhanced from 0.57 to 2.69 W/(m·K) at 700 °C after penetration into APC. The microstructure observed by a scanning electron microscope (SEM) showed that NaCl-KCl eutectics successfully filled the irregular holes of APC. The good wettability between NaCl-KCl and APC was conducive to the infiltration of NaCl-KCl, improving the stability of the composites and preventing leakage of the molten salt. The prepared NaCl-KCl/APC C-PCMs could retain 97% of latent heat, and no significant cracks or new phases formed even after 100 melting–freezing thermal cycle tests. In all, these findings demonstrate that the prepared NaCl-KCl/APC C-PCMs have considerable potential in concentrated solar power plant, industrial waste heat recovery, and other high-temperature thermal energy storage fields.

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Section: ■ Results and Discussionmentioning

confidence: 99%

Novel Low-Cost Anorthite Porous Ceramic-Based Binary Chlorate High-Temperature Thermal Energy Storage Material: Preparation and Characterization

Liu

Zhang

et al. 2021

Energy Fuels

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“…A CPCM usually consists of a PCM for heat storage, a ceramic skeleton material (CSM) for shape stabilization and a thermal conductivity enhancement material (TCEM) for heat transfer enhancement. Such an approach has been shown to give an outstanding combination of thermophysical and mechanical properties . However, little work has been found on the use of the CPCM in the design of electrical storage heaters.…”

Section: Introductionmentioning

confidence: 99%

“…Such an approach has been shown to give an outstanding combination of thermophysical and mechanical properties. [19][20][21][22][23] However, little work has been found on the use of the CPCM in the design of electrical storage heaters. Lin et al 24,25 proposed an underfloor electrical storage system containing a shape-stabilized CPCM made of paraffin (PCM) and polyethylene (CSM) with a mass ratio of 75:25.…”

Section: Introductionmentioning

confidence: 99%

A novel high temperature electrical storage heater using an inorganic salt based composite phase change material

Zhao

et al. 2019

Energy Storage

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We have studied a high temperature storage heater containing an inorganic salt based composite phase change material (CPCM) for electrical load shift and operation cost reduction. The storage heater consists of CPCM modules with embedded electrical elements for charging at off‐peak hours and flow channels for discharging the stored heat in a controlled manner when needed. The flow channels are for heat transfer fluid (HTF, air in this work) to exchange heat with the CPCM modules and transport the heat to the heating space. A series of experiments are carried out to study the charging and discharging behavior of the storage heater. The effects of the flow channel arrangements between the CPCM modules, and the heating element arrangements inside the heater are studied. A mathematical model is also developed to investigate the performance of the storage heater with a focus on the performance comparison of the storage heater filled with the CPCM and that with the ferric oxide bricks (the conventional sensible heat storage material), and the evaluation of temperature control strategy for the CPCM based storage heater. The results show that a charge of 8 hours of the storage heater during the off‐peak period is sufficient to supply heat for the whole day under the conditions of this work. The flow channel arrangements have significant influences on the storage heater performance in terms of temperature distribution of the CPCM modules and HTF outlet temperature, and the efficiencies of the charging and discharging processes. An interlaced arrangement of CPCM modules in the heater can effectively reduce the temperature swing (eg, between 21.7°C and 22.5°C over a day) and hence improve the room thermal comfort level. The results also show that the CPCM based storage heater gives a superior performance than the ferric oxide based storage heater. Given the storage volume, the power rating, and the amount of stored heat, the mass of the ferric oxide based storage heater is more than 1.6 times that of the CPCM based storage heater. Given the mass and power rating, the heat storage capacity of the CPCM based heater is nearly 68% higher than that of the ferric oxide based storage heater. It is also found that the heat storage performance could be enhanced through a temperature control strategy with the temperature measurement located 15 mm away from the heating elements, for which the heating elements only need two start‐stops over the 8‐hour charging period.

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A comprehensive review of computational fluid dynamics simulation studies in phase change materials: applications, materials, and geometries

Soodmand,

Azimi,

Nejatbakhsh

et al. 2023

J Therm Anal Calorim

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Wettability of eutectic NaLiCO3 salt on magnesium oxide substrates at 778 K

Cited by 31 publications

References 23 publications

Novel Low-Cost Anorthite Porous Ceramic-Based Binary Chlorate High-Temperature Thermal Energy Storage Material: Preparation and Characterization

Novel Low-Cost Anorthite Porous Ceramic-Based Binary Chlorate High-Temperature Thermal Energy Storage Material: Preparation and Characterization

A novel high temperature electrical storage heater using an inorganic salt based composite phase change material

A comprehensive review of computational fluid dynamics simulation studies in phase change materials: applications, materials, and geometries

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Wettability of eutectic NaLiCO3 salt on magnesium oxide substrates at 778 K

Cited by 31 publications

References 23 publications

Novel Low-Cost Anorthite Porous Ceramic-Based Binary Chlorate High-Temperature Thermal Energy Storage Material: Preparation and Characterization

Novel Low-Cost Anorthite Porous Ceramic-Based Binary Chlorate High-Temperature Thermal Energy Storage Material: Preparation and Characterization

A novel high temperature electrical storage heater using an inorganic salt based composite phase change material

A comprehensive review of computational fluid dynamics simulation studies in phase change materials: applications, materials, and geometries

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Product

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About

Wettability of eutectic NaLiCO3 salt on magnesium oxide substrates at 778 K