Surface-Modified Compressed Expanded Graphite for Increased Salt Hydrate Phase Change Material Thermal Conductivity and Stability

Blackley, Erin; Lai, Trinny; Odukomaiya, Adewale; Tabares-Velasco, Paulo Cesar; Wheeler, Lance M.; Woods, Jason

doi:10.1021/acsaem.3c01223

Cited by 6 publications

(1 citation statement)

References 63 publications

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“…On comparing the performance of double coated panels with single coated panels, double coated panels exhibited better I max , P max and lower T max . This was due to the presence of dispersed SiO 2 nanoparticles in Expanded Graphite matrix, which ensured faster heat dissipation [75].…”

Section: Thermogravimetry Analysismentioning

confidence: 99%

Enhancing photo voltaic solar panel efficiency by using a combination of silica based and phase change material coating

Sankaran,

Pappan,

Balakrishnan

2023

Mater. Res. Express

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This study attempts to enhance the overall efficiency of a photo voltaic solar panel by employing a dual-coating approach. The initial coating consists of a Silica-based anti-reflective material synthesized through an acid-catalyzed sol-gel process, utilizing cetyltrimethylammonium bromide as a template. Subsequently, the second coating was formulated using a phase change material, such as expanded graphite infused with paraffin jelly. The coating materials were characterized using Ultraviolet-Visual ray spectroscopy, Fourier Transform-Infrared Ray spectroscopy, Field Emission-Scanning Electron Microscopy, X-Ray Diffraction spectroscopy, and Thermogravimetry analysis. The panels' performance had been investigated under three conditions: uncoated, single-coated, and double-coated. These panels were subjected to both indoor and outdoor experiments. Indoor tests were conducted in a laboratory with induced irradiance levels of 350, 600, and 850 W/m2. The corresponding variations in maximum power output, maximum surface temperature and peak current were recorded. For the outdoor experiments, two sets of panels were installed on a rooftop. One set underwent daily surface cleaning, while the other was left untouched, allowing dust accumulation. Over a 45-day period, outdoor experiments were carried out (daily cleaned and unclean panels) to examine the impact of dust accumulation on power loss, current, voltage, surface temperature, energy generation and panel efficiency. Upon comparing the performance of uncoated, single-coated, and double-coated solar panels, it was observed that photovoltaic solar panels coated with both silica-based anti-reflective coating and paraffin jelly-infused expanded graphite coating exhibited superior performance when compared to other coating options.

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Section: Thermogravimetry Analysismentioning

confidence: 99%

Enhancing photo voltaic solar panel efficiency by using a combination of silica based and phase change material coating

Sankaran,

Pappan,

Balakrishnan

2023

Mater. Res. Express

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Manufacturing of Continuous Core–Shell Hydrated Salt Fibers for Room Temperature Thermal Energy Storage

Toomey,

Kanbargi,

Kearney

et al. 2024

Adv Eng Mater

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The encapsulation of salt hydrate phase change materials (PCM) in uniform microscale bodies has yet been reported in research due in part to the delicate relationship between thermal performance and water‐to‐salt ratios which are easily altered during manufacturing. In this work, core‐shell composite fibers comprised of a salt hydrate PCM core and a poly(acrylonitrile) (PAN) shell were wet spun in a continuous process using a syringe pump and coaxial die. The PCM phase was comprised of CaCl2•6H2O with SrCl2•6H2O (3 wt%) and fumed silica (SiO2) (2 wt%) as additive, a composition that was prepared from homogenous melt at 40 ºC. 15 wt% PAN in dimethylsulfoxide (DMSO) solvent was used to prepare the shell‐forming polymer gel. Injection rates of 10‐40 mL/h for the PCM melt and polymer gel were used to spin coaxial fibers through a coagulation bath to yield continuous microtubules with diameters in the range of 850‐1500 μm. Cyclic testing showed that after 1000 cycles, melting enthalpies incurred only a 3.5% decline from 131.46 J/g to 126.9 J/g. Success here overcomes several coincidental drawbacks of PCM fiber performance and manufacturing, and delivers the first example of scalable roll‐to‐roll PCM fiber produced by wet spinning for building material applications.This article is protected by copyright. All rights reserved.

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Modification of Phase Change Materials for Electric‐Thermal, Photo‐Thermal, and Magnetic‐Thermal Conversions: A Comprehensive Review

Liu,

Qian,

Yang

et al. 2024

Adv Funct Materials

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Phase change materials (PCMs) are widely regarded as one of the most promising thermal energy storage technologies, owing to their outstanding latent heat storage density and controllable thermal storage/release characteristics. However, pure PCM usually has certain limitations in terms of electric‐, photo‐, and magnetic‐thermal conversion. In recent years, research on enhancing these properties through the addition of various fillers has garnered widespread attention. Herein, this paper elaborates on the modification of PCM for electric‐thermal, photo‐thermal, and magnetic‐thermal conversion, including their respective modification strategies, properties, and applications. Therein, a comparative analysis is conducted on the electric‐, photo‐, and magnetic‐thermal conversion efficiency of PCM with different fillers. Further, a summary and analysis are conducted on the addition of some fillers to PCM, which simultaneously improves the conversion performance of the two or three mentioned above, enabling multiple energy conversion. Finally, existing problems, solutions, and future development directions are put forward.

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Surface-Modified Compressed Expanded Graphite for Increased Salt Hydrate Phase Change Material Thermal Conductivity and Stability

Cited by 6 publications

References 63 publications

Enhancing photo voltaic solar panel efficiency by using a combination of silica based and phase change material coating

Enhancing photo voltaic solar panel efficiency by using a combination of silica based and phase change material coating

Manufacturing of Continuous Core–Shell Hydrated Salt Fibers for Room Temperature Thermal Energy Storage

Modification of Phase Change Materials for Electric‐Thermal, Photo‐Thermal, and Magnetic‐Thermal Conversions: A Comprehensive Review

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