Enhanced thermophysical properties of Metal oxide nanoparticles embedded magnesium nitrate hexahydrate based nanocomposite for thermal energy storage applications

Gupta, Neeraj; Kumar, Amit; Dhasmana, Hrishikesh; Kumar, Vivek; Kumar, A. P. Senthil; Shukla, Prashant; Verma, Abhishek; Nutan, Gautam V.; Dhawan, S. K.; Jain, V. K.

doi:10.1016/j.est.2020.101773

Cited by 56 publications

(9 citation statements)

References 41 publications

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“…Among them, 8 wt % ZnO has the best effect, and appropriate nanoparticles and concentration should be selected according to application requirements. Gupta et al 119 added TiO 2 , ZnO, Fe 2 O 3 , and SiO 2 spherical nanoparticles to magnesium nitrate hexahydrate, with an average particle size of 50 nm. The experiment found that the optimal concentration of nanoparticles was 0.5 wt %, and the TC was increased by 147.5%, 62.5%, 55%, and 45%, respectively.…”

Section: Role Of Additives and Comparativementioning

confidence: 99%

Comparative Analysis of Additives for Increasing Thermal Conductivity of Phase Change Materials: A Review

Zhang

et al. 2022

Energy Fuels

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The use of cold storage devices to store energy at low peaks of power usage and release it at peaks is an economic measure. It is also one of the main means to solve the imbalance between electricity shortages during the day and abundance at night. Adding cold storage balls equipped with phase change materials (PCMs) into water cold storage devices can utilize the sensible heat of water and the latent heat of PCMs for cold storage, which has a high energy storage density and can provide cold water with a suitable temperature. PCMs can be divided into organic phase change materials (OPCMs) and inorganic phase change materials (IPCMs), but both have defects. Adding additives or other materials to them to form composite phase change materials (CPCMs) can obtain suitable thermal properties. In the process of material application, some PCMs have problems of poor thermal conductivity (TC) and liquid leakage. The use of additives such as expanded graphite (EG), metal foam, and nanoparticles is a better solution to the above problems. In recent years, many scholars have researched PCMs and additives for increasing thermal conductivity (AITC). However, there is still a lack of detailed comparison among EG, metal foam, and nanoparticles. This article will introduce the PCMs used in the temperature zone (TZ) of cold storage air-conditioning systems (CSASs) and analyze their advantages, disadvantages, and improvement methods. This paper will focus on the latest research on the effect of additives such as nanoparticles, EG, and metal foam on the TC of PCMs. It will also compare the special effects of AITC in preventing supercooling, preventing phase separation, preventing leakage of liquid PCMs, and flame retarding. The future research directions of AITC will be discussed.

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Section: Role Of Additives and Comparativementioning

confidence: 99%

Comparative Analysis of Additives for Increasing Thermal Conductivity of Phase Change Materials: A Review

Zhang

et al. 2022

Energy Fuels

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“…Introducing 0.5 wt % TiO 2 , ZnO, Fe 2 O 3 , and SiO 2 can effectively enhance the thermal conductivity of PCM–MO nanocomposites by 147.5, 62.5, 55, and 45% reported by Gupta et al (2020). 27 …”

Section: Introductionmentioning

confidence: 99%

“…Introducing 0.5 wt % TiO 2 , ZnO, Fe 2 O 3 , and SiO 2 can effectively enhance the thermal conductivity of PCM−MO nanocomposites by 147.5, 62.5, 55, and 45% reported by Gupta et al (2020). 27 However, PCM leakage is crucial for the window, which can be resolved by applying strategies like shape-stabilized composite PCMs and core−shell composite PCMs. 28 Addition of a higher thermal conductive material can be directly introduced to the PCM to obtain higher thermal conductivity of PCMs.…”

Section: ■ Introductionmentioning

confidence: 99%

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Synergistic Effect of Paraffin-Incorporated In₂O₃/ZnO Multifold Smart Glazing Composite for the Self-Cleaning and Energy-Saving Built Environment

Roy

Ullah

Alzahrani

et al. 2022

ACS Sustainable Chem. Eng.

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The thermal performance of window glazing requires improvement for a sustainable built environment at an acceptable cost. The current work demonstrates a multifold smart composite consisting of an optimized In 2 O 3 /ZnO–polymethyl methacrylate–paraffin composite to reduce heat exchange through the combined self-cleaning and energy-saving envelope of the smart built environment. This work has attempted to develop a smart composite coating that combines photosensitive metal oxide and phase change materials and investigate their thermal comfort performance as a glazed window. It is observed that the In 2 O 3 /ZnO (5 wt %) multifold composite film experienced better transmittance and thermal performance compared to its other wt % composite samples. Moreover, the multifold composite-coated glass integrated into a prototype glazed window was further investigated for its thermal performance, where a steady average indoor temperature of ∼30 °C was achieved when the outside temperature reached ∼55 °C, while maintaining good visibility. Interestingly, the transparency reached ∼86% at 60 °C and exhibited a hydrophobic water contact angle (WCA) of ∼138°. In contrast, a similar film exhibits ∼64% transparency at 22 °C, where the WCA becomes moderately hydrophilic (∼68°). Temperature dependency on transparency and wettability properties was examined for up to 60 cycles, resulting in excellent indoor thermal comfort. In addition, a thermal simulation study was executed for the smart multifold glazing composite. Moreover, this study offers dynamic glazing development options for energy saving in the smart built environment.

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“…The addition of nanoparticles can also improve the heat transfer performance of molten salt to a certain extent. Gupta et al [ 25 ] added different types of nanoparticles (TiO 2 , ZnO, Fe 2 O 3 , and SiO 2 ) to the phase change material (PCM) of Mg(NO 3 ) 2 ·6H 2 O and formed the PCM–metal oxide nanocomposite material through the melting and mixing technology. The PCM–metal oxide nanocomposite with a 0.5 wt % nanoparticle addition increased the thermal conductivity by 147.5% (TiO 2 ), 62.5% (ZnO), 55% (Fe 2 O 3 ), and 45% (SiO 2 ), respectively.…”

Section: Introductionmentioning

confidence: 99%

The Effect of In Situ Synthesis of MgO Nanoparticles on the Thermal Properties of Ternary Nitrate

Tong

et al. 2021

Materials

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The multiple eutectic nitrates with a low melting point are widely used in the field of solar thermal utilization due to their good thermophysical properties. The addition of nanoparticles can improve the heat transfer and heat storage performance of nitrate. This article explored the effect of MgO nanoparticles on the thermal properties of ternary eutectic nitrates. As a result of the decomposition reaction of the Mg(OH)2 precursor at high temperature, MgO nanoparticles were synthesized in situ in the LiNO3–NaNO3–KNO3 ternary eutectic nitrate system. XRD and Raman results showed that MgO nanoparticles were successfully synthesized in situ in the ternary nitrate system. SEM and EDS results showed no obvious agglomeration. The specific heat capacity of the modified salt is significantly increased. When the content of MgO nanoparticles is 2 wt %, the specific heat of the modified salt in the solid phase and the specific heat in the liquid phase increased by 51.54% and 44.50%, respectively. The heat transfer performance of the modified salt is also significantly improved. When the content of MgO nanoparticles is 5 wt %, the thermal diffusion coefficient of the modified salt is increased by 39.3%. This study also discussed the enhancement mechanism of the specific heat capacity of the molten salt by the nanoparticles mainly due to the higher specific surface energy of MgO and the semi-solid layer that formed between the MgO nanoparticles and the molten salt.

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Enhanced thermophysical properties of Metal oxide nanoparticles embedded magnesium nitrate hexahydrate based nanocomposite for thermal energy storage applications

Cited by 56 publications

References 41 publications

Comparative Analysis of Additives for Increasing Thermal Conductivity of Phase Change Materials: A Review

Comparative Analysis of Additives for Increasing Thermal Conductivity of Phase Change Materials: A Review

Synergistic Effect of Paraffin-Incorporated In₂O₃/ZnO Multifold Smart Glazing Composite for the Self-Cleaning and Energy-Saving Built Environment

The Effect of In Situ Synthesis of MgO Nanoparticles on the Thermal Properties of Ternary Nitrate

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Enhanced thermophysical properties of Metal oxide nanoparticles embedded magnesium nitrate hexahydrate based nanocomposite for thermal energy storage applications

Cited by 56 publications

References 41 publications

Comparative Analysis of Additives for Increasing Thermal Conductivity of Phase Change Materials: A Review

Comparative Analysis of Additives for Increasing Thermal Conductivity of Phase Change Materials: A Review

Synergistic Effect of Paraffin-Incorporated In2O3/ZnO Multifold Smart Glazing Composite for the Self-Cleaning and Energy-Saving Built Environment

The Effect of In Situ Synthesis of MgO Nanoparticles on the Thermal Properties of Ternary Nitrate

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About

Synergistic Effect of Paraffin-Incorporated In₂O₃/ZnO Multifold Smart Glazing Composite for the Self-Cleaning and Energy-Saving Built Environment