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The prepared nano-enhanced phase change material had a thermal conductivity increase of 27% at 0.36% wt. The developed enhanced material was thermally stable after 250 thermal cycles and, consequently, could be suggested for solar thermal energy storage applications.
Zormati S, Mhiri H, Aloulou F, Sammouda H. Synthesis and characterization of organoclay and cellulose nanofibers modified with lauric acid eutectic as new phase change material (PCM) used in buildings for thermal energy storage.
The results showed that the myo-inositol-based nano-enhanced phase change material was very suitable to be applied in solar thermal energy storage processes at temperatures from 160 °C to 260 °C.
Many authors have proposed dispersing nanoparticles into the base phase change materials, the encapsulation of phase change materials with nanoparticles, and the use of nano-enhanced phase change materials, since these methodologies will improve the thermal performance of the phase change materials in energy harvesting and conversion processes.
The thermal transport network constructed by the foams’ diverse constitutive materials and the effect of the finned surfaces that increase the heat exchange rate between the included nano-enhanced phase change materials and the solar collection system ameliorate the energy harvesting and conversion processes.
The nano-enhanced phase change material produced exhibited excellent thermal energy storage capacity. In detail, the expanded graphite was prepared with a certain amount of natural flake graphite added to a solution of glacial acetic acid and nitric acid under stirring in a 35 °C water bath to form a uniformly distributed mixture.
Nano-phase separating Ni–12 at. pct Ag powders are processed via high-energy ball milling and brought into a supersaturated state with a reduction of the grain size to the nanocrystalline scale, a combination that is designed to encourage rapid densification by phase separation upon heating. This unstable powder is then characterized by dilatometry, in-situ x …
A two dimensional numerical model is developed for melting of a nano based phase change material (PCM) such as n-octadecane with CuO nanoparticle in a square cavity. The governing equations are ...
Therefore, Nano-enhanced organic phase change materials (NEOPCM''s) have been found to be some of the most promising energy storage materials, surpassing the limitations of PCM''s [7], [8], [9]. The TC of NEOPCM is influenced by nanoparticles'' inherent TC and the PCMs and nanoparticles interactional compatibility [10]. Carbon-based nanotechnology ...
As the energy demand is increasing and conventional energy sources are declining, renewable energy sources are becoming increasingly popular. It is very important to store this energy efficiently. The use of phase change materials (PCMs) as latent heat thermal energy storage (LHTES) technology has utmost importance to researchers due to its high …
Medium temperature phase change materials (PCMs) are of great interest for thermal devices due to their energy storage capability. In the current study, organic PCMs with silver nanoparticles are experimentally investigated and energized to improve the energy storage ability. Organic PCM composites with silver metal nanoparticles of 20–40 nm in size at different …
However, the process of preparing the nano-enhanced phase change material s is highly technical, requiring special equipment and precise procedures. Many studies indicated significant improvement in the phase change materials'' thermal and mechanical properties when the nanomaterials were added, but some works also highlighted that the ...
High conductive nanoparticles dispersed in the PCM offer a promising solution for improving TC and sustaining thermal efficiency [6].Therefore, Nano-enhanced organic phase change materials (NEOPCM ''s) have been found to be some of the most promising energy storage materials, surpassing the limitations of PCM''s [7], [8], [9].The TC of NEOPCM is …
Advanced phase change hydrogel integrating metal-organic framework for self-powered thermal management. Author links open overlay panel Piao Cheng a b 1, Zhaodi Tang c 1, Xiao Chen a, Jianhang Xu c, ... Nano Lett., 20 (2020), pp. 3791-3797. Crossref View in Scopus Google Scholar [6]
Effect of phase change materials on the performance of direct vapor generation solar organic Rankine cycle system. Author links open ... KNO 2 –NaNO 3 has shown minimum decrement in rise and fall in organic fluid temperature of 0.12 °C and 5.81 °C with an increase in evaporation temperature while Actemide has shown maximum decrement ...
Phase change materials (PCMs)-based thermal storage systems have a lot of potential uses in energy storage and temperature control. However, organic PCMs (OPCMs) …
The electricity-induced amorphization process has been widely observed in phase-change materials that can reversibly switch between crystalline and amorphous states, …
In this work, the experimental investigations were piloted to study the influence of hybrid nanoparticles containing SiO2 and CeO2 nanoparticles on thermo-physical characteristics of the paraffin-based phase …
The DSC thermograms show that the melting point and phase change enthalpy of FSPCM are 21.8 °C and 72.6 J/g and freezing temperature and corresponding latent heat is 20.3 °C and 71.9 J/g, respectively. It indicates that the developed FSPCM has appropriate phase change temperature and high latent heat energy storage capacity.
The nano-encapsulation successfully confined the leakage and water evaporation of hydrated salt during heating. Download: Download high-res image (762KB) ... With the phase change properties of EIPCM, the peak battery surface temperature was decreased by 20% and 23.7% at discharge rates of 2C and 3C, respectively, and the peak temperature ...
The current research condenses the synthesis, chemical, physical, and thermal characterization of novel nano-enhanced eutectic phase change materials (NeUPCMs) dispersed with TiO 2 nanofillers for thermal management applications. The base matrix primarily comprises of a eutectic of paraffin wax and palmitic acid. Detailed analysis of the ...
This review offers a critical survey of the published studies concerning nano-enhanced phase change materials to be applied in energy harvesting and conversion. Also, the main thermophysical characteristics of …
In the experimental study presented here, the effectiveness of using hybrid nanoparticles of Graphene nanoplatelet (GNP) aggregates and Silver (Ag) nanoparticles as a thermal conductivity enhancer (TCE) in an organic solid–liquid phase change material (PCM) is examined. An in-situ reduction method was used to synthesize the GNP-Ag hybrid …
In the face of rising global energy demand, phase change materials (PCMs) have become a research hotspot in recent years due to their good thermal energy storage capacity. Single PCMs suffer from defects such as easy leakage when melting, poor thermal conductivity and cycling stability, which are not conducive to heat storage. Therefore, …
The phase transition temperatures corresponding to with the nano iron as the crystal center are in the area of 56–58 °C, to be in the middle of the phase transition temperatures of α-crystal and β-crystal, which may be caused by the position of nano iron particle in the CaCO 3 shell. Compared with pure SA, the supercooling degree of homogeneous nucleation of the …
Micro- or nano-encapsulated phase change material slurry (MPCMs/NPCMs)) is formed via the dispersion of micro or nano-sized capsules of PCMs in a base fluid. In order to disperse these materials in fluid, a common method is to use a surfactant [31, 32]. These materials can boost specific heat (thermal capacity) of fluid, as a result, enhancing ...
This study deals with fabrication, physico–chemical characterizations and thermal properties of n-octadecane nanocapsules as organic PCM (phase change materials) for TES …
Thermal energy storage (TES) and harvesting is an effective technique for optimum building thermal management. Phase-change materials (PCMs) are commonly used for TES applications but are troubled by their degraded thermal conductivity. Recent research progress in latent heat energy storage using PCMs and nano additives provides a viable …
Nano Energy. Volume 105, January 2023, 108009. ... [17]. However, their low phase change enthalpies (commonly in the range of 50–200 J g −1) are difficult to satisfy the high heat dissipation requirements of high-energy-density electronic devices [18], [19]. Therefore, it is still challenging to develop a simple cooling technology with high ...
The morphological characteristics, chemical stability, optical transmittance and absorbance nature, phase change characteristics, thermal conductivity and thermal stability …
The increasing need for energy, along with limiting resources, has encouraged the development of novel solutions in the fields of energy conservation and storage. Phase change materials (PCMs), which are differentiated by properties such as large energy storage capacities, chemical stability, and reactivity to reduced working temperatures, play an …
The book chapter focuses on the complexities of Phase Change Materials (PCMs), an emerging solution to thermal energy storage problems, with a special emphasis on nanoparticle-enhanced PCMs (NePCM). The first sections provide a …
Smart and functional fibers have demonstrated great potentials in a wide range of applications including wearable devices and other high-tech fields, but design and fabrication of smart fibers with manageable structures as well as versatile functions are still a great challenge. Herein, an ingenious bending-stiffness-directed strategy is developed to fabricate smart phase …
In the actual context of growing concerns over sustainability and energy efficiency, Phase Change Materials (PCMs) have gained attention as promising solutions for enhancing energy storage and release efficiency. On another hand, materials based on graphene oxide (GO) have proven antibacterial activity, biocompatibility, efficiency in microbial growth …
In the experimental study presented here, the effectiveness of using hybrid nanoparticles of Graphene nanoplatelet (GNP) aggregates and Silver (Ag) nanoparticles as a …
Materials that change phase (e.g., via melting) can store thermal energy with energy densities comparable to batteries. Phase change materials will play an increasing role …
The present energy generation from renewable resources does not meet the current global demand for energy supply, and there is a need to come up with more innovative technologies that could bridge the gap between the energy supply and demand. Phase change materials (PCM) are one of the most effective and on-going fields of research in terms of …