Core shell paraffin/silica nanocomposite: A promising phase change material for thermal energy storage (2024)

Enhancing the performance of thermal energy storage by adding nano-particles with paraffin phase change materials

Nanotechnology Reviews, De Gruyter, 2024

Phase change materials (PCMs) are now being extensively used in thermal energy storage (TES) applications. Numerous researchers conducted experiments using various circumstances and materials to optimize storage performance. A study was conducted to compare the numerical research of the melting process of paraffin wax using a hybrid nano-integrated paraffin PCM with graphene oxide (GO) and single-walled carbon nanotubes (SWCNTs) in a TES unit. Hence, this research focuses on a sustainable TES system using hybrid nanomaterials (PCM + GO, PCM + SWCNTs, PCM + GO + SWCNT) with varying concentrations of nanoparticles. The objective is to improve the thermal characteristics of PCMs. The main aim of this study is to examine the numerical analysis of the system inside a TES that has a rectangular form. The numerical experiments were conducted using the finite-volume solver Ansys Fluent. The obtained findings show the thermophysical characteristics fluctuations with respect to the solid volume fractions, liquid fraction, temperature, and velocity inside the TES system. Implementing an effective heat transfer mechanism from the point of capture to storage and later consumption necessitates the employment of a heat transfer fluid. The inclusion of SWCNT particles at a concentration of just 10% has been seen to expedite the melting phenomenon. Furthermore, incorporating GO in conjunction with SWCNT alleviates this phenomenon, resulting in a melting behavior that resembles that of unadulterated paraffin. Additionally, the introduction of just 1% GO, combined with SWCNT, leads to a rapid alteration in surface heat transfer coefficient compared to the scenario with single SWCNT and paraffin. These insights hold practical relevance for the development of TES systems in various applications.

Phase Change Material Nanocomposites for Thermal Energy Storage Applications

The 3rd International Online-Conference on Nanomaterials

Energy storage and solidification of paraffin phase change material embedded with graphite nanofibers

International Journal of Heat and Mass Transfer, 2011

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

Molecules

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-...

Characterization of Hybrid-nano/Paraffin Organic Phase Change Material for Thermal Energy Storage Applications in Solar Thermal Systems

Energies

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 change material (PCM). Initially, the hybrid nanoparticles were prepared by blending equal mass of SiO2 and CeO2 nanoparticles. The hybrid-nano/paraffin (HnP) samples were prepared by cautiously dispersing 0, 0.5, 1.0, and 2.0 percentage mass of hybrid nanoparticles inside the paraffin, respectively. The synthesized samples were examined under different instruments such as field emission scanning electron microscope (FESEM), Fourier transform infrared spectrometer (FTIR), differential scanning calorimetry (DSC), thermogravimetric analyzer (TGA), and thermal properties analyzer to ascertain the influence of hybrid nanoparticles on thermo-physical characteristics of the prepared samples. The obtained experimental results proved that the hybrid nanoparticles were uniformly diffused...

A Review on Thermophysical Properties of Nanoparticle-Enhanced Phase Change Materials for Thermal Energy Storage

Springer Proceedings in Physics, 2016

Thermo-physical characterization of some paraffins used as phase change materials for thermal energy storage

Journal of Thermal Analysis and Calorimetry, 2014

Development of Paraffin-Based Shape-Stable Phase Change Material for Thermal Energy Storage

polymer science series A, 2022

⎯In the present work, a shape-stable phase change material has been prepared by blending the polystyrene-block-poly(ethylene-ran-butylene)-block-polystyrene triblock copolymer and paraffin. Different mass fractions of block copolymer have been used to produce composites material. The structural, chemical and morphological analyses of composites have been done. Differential scanning calorimetry and thermogravimetric analysis results indicated that the addition of supporting material (block copolymer) improves the thermal stability without much affecting the phase transition temperature of paraffin. The paraffin leakage in composites is analyzed by mass loss over thermal cycles in an oven at 80°C and the best performance has been achieved for 20 wt% of block copolymer into the composite. The thermal reliability of this sample has been investigated after 100 thermal cycles. Overall inspection of results suggested that the prepared composite is the most appropriate shape-stable phase change material for thermal energy storage applications because of their acceptable energy storage capacity, good thermal stability and reliability, physical and chemical compatibility, low cost and easy synthesis process.

Photothermal properties and photothermal conversion performance of nano-enhanced paraffin as a phase change thermal energy storage material

Solar Energy Materials and Solar Cells, 2021

Microencapsulation of bio-based phase change materials with silica coated inorganic shell for thermal energy storage

Journal of building engineering, 2023