Temperature leveling of electronic chips by solid-solid phase change materials compared to solid-liquid phase change materials

Baba, Masaaki; Nemoto, Kosei; Otaki, Daiki; Sasaki, Takuto; Takeda, M.; Yamada, Noboru

doi:10.1016/j.ijheatmasstransfer.2021.121731

Cited by 11 publications

(6 citation statements)

References 45 publications

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“…-To store and later release non-desired heat in photovoltaic/thermal systems working in hot weather conditions to enhance their efficiency [65][66][67][68][69][70]. -To manage the heat and improve the heat sink in electric and electronic devices [71][72][73][74].…”

Section: Uses and Applications Of Paraffinmentioning

confidence: 99%

Paraffin As a Phase Change Material to Improve Building Performance: An Overview of Applications and Thermal Conductivity Enhancement Techniques

Al-Yasiri

Szabó

2021

Renew. Energy Environ. Sustain.

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In recent years, phase change materials (PCMs) have increasingly received attention in different thermal energy storage and management fields. In the building sector, paraffin as a phase change material (PPCM) has been introduced as an efficient PCM incorporated in a building envelope, which showed remarkable results. However, the poor thermal conductivity of PPCM is still the topmost drawback in experimental and numerical investigations. In this paper, a general assessment of paraffins, their common uses and applications, have been presented with a particular focus on their potential in building envelope applications. Moreover, the general and desired properties of PPCM are highlighted and evaluated. The primary practical limitation of PPCM of poor thermal conductivity and their effect on PPCM performance is presented and discussed. Correspondingly, the popular techniques applied to improve the poor thermal conductivity are presented and discussed in four categories: the dispersion of nanoparticles, expanded graphite, metallic foam, and extended surfaces technique (fins). All in all, the analysed research works indicated that PPCM based building envelope applications could remarkably improve the thermal performance of buildings in terms of thermal load reduction, energy-saving and thermal comfort. Furthermore, the adoption of enhancement techniques is essential to improve the thermal performance of PPCM in building applications for better utilisation. This review provides a clear vision for the newcomers and interested parties about the main application aspects of PPCM in the building sector for further investigations towards technology commercialisation.

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Section: Uses and Applications Of Paraffinmentioning

confidence: 99%

Paraffin As a Phase Change Material to Improve Building Performance: An Overview of Applications and Thermal Conductivity Enhancement Techniques

Al-Yasiri

Szabó

2021

Renew. Energy Environ. Sustain.

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“…Notably, a PCM with a high FOM can absorb high-power heat pulses. The reported FOMs of paraffin (Sharar et al, 2019), VO2 (Baba et al, 2021), andNiTi (Sharar et al, 2019) with phase transition temperatures of 50-70 °C are 23 × 10 6 , 1253 × 10 6 , and 1478 × 10 6 J 2 K -1 s -1 m -4 , respectively. The temperature-leveling performances of VO2 and NiTi were investigated and compared in our study owing to their high FOMs among those of the known PCMs.…”

Section: Introductionmentioning

confidence: 99%

“…In contrast, solid-solid PCMs are more suitable for thermal management of electronic devices because they do not require containers (Praveen and Suresh, 2018;Sharar et al, 2019;Warzoha et al, 2020;Baba et al, 2021;Sharar et al, 2021;Kinemuchi et al, 2021;Nemoto et al, 2022;Akhil Krishnan et al, 2023). Moreover, solid-solid PCMs can be broadly classified into organic (Praveen and Suresh, 2018;Akhil Krishnan et al, 2023) and inorganic PCMs (Sharar et al, 2019;Warzoha et al, 2020;Baba et al, 2021;Sharar et al, 2021;Kinemuchi et al, 2021;Nemoto et al, 2022). The κ value of inorganic PCMs is higher than that of organic PCMs, making them suitable for deriving high-temperature responses without TCEs.…”

Section: Introductionmentioning

confidence: 99%

“…VO2 (Baba et al, 2021;Nemoto et al, 2022) and NiTi alloys (Ren et al, 2001;Sharar et al, 2019;Warzoha et al, 2020;Sharar et al, 2021;Kato, 2021) are typical inorganic solid-solid PCMs. In particular, VO2, a metal-insulator transition material, is a promising reversible PCM with a near-ambient phase transition temperature (Tm ≈ 68 °C), which can be controlled by W doping (Lee et al, 2017).…”

Section: Introductionmentioning

confidence: 99%

“…The temperature-leveling performances of VO2 and NiTi were investigated and compared in our study owing to their high FOMs among those of the known PCMs. In a previous study, we simulated the effects of thermophysical properties, such as κ, specific heat (c), and Lv, on the temperature-leveling performance of a PCM (Baba et al, 2021) by assuming constant q and PCM thickness (w) values. Although the thermophysical properties of these PCMs are typically used to predict their temperature-leveling performances, these evaluation methods do not consider the mounting shape of the tested PCMs.…”

Section: Introductionmentioning

confidence: 99%

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Temperature-leveling performance comparison of solid–solid phase change materials for thermal management of electronic chips in thin devices

BABA,

ISHIHARAJIMA,

ISHISAKA

et al. 2024

JTST

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A Copolymer of Monomethoxy Poly(ethylene glycol)‐Polycaprolactone as Form‐Stable Phase Change Materials for Thermal Energy Storage

Ong,

Lee,

Yeo

et al. 2023

ChemistrySelect

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In this work, a series of monomethoxy poly(ethylene glycol)‐polycaprolactone (mPEG‐PCL) copolymers with different mass percentages of mPEG was chemically synthesized as form‐stable phase change materials (FSPCMs) for thermal energy storage (TES) application for the first time. Their chemical structures, surface morphology, and thermal properties were studied in terms of nuclear magnetic resonance (NMR), Fourier transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and differential scanning calorimetry (DSC). 1H NMR, gel permeation chromatography (GPC), and FTIR results confirmed the successful ring‐opening polymerization of ϵ‐caprolactone with mPEG macromonomer, and the respective average molecular weight of the copolymers was obtained in the range of 9704–17346 g mol−1. DSC analysis results revealed that the copolymers have a phase change temperature and latent heat in the range of 52.8–57.9 °C and 88.8–114.4 J g−1 respectively and TGA analysis showed that they are thermally stable up to 150 °C. Leakage test results showed that the copolymers (mPEG)x‐(PCL)y displayed excellent form stability with minimal leakage while thermal cycling revealed good thermal reliability. In addition, the copolymers successfully demonstrated their ability to store and release heat for a prolonged period, making them suitable for TES applications like heating water storage tanks.

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Temperature leveling of electronic chips by solid-solid phase change materials compared to solid-liquid phase change materials

Cited by 11 publications

References 45 publications

Paraffin As a Phase Change Material to Improve Building Performance: An Overview of Applications and Thermal Conductivity Enhancement Techniques

Paraffin As a Phase Change Material to Improve Building Performance: An Overview of Applications and Thermal Conductivity Enhancement Techniques

Temperature-leveling performance comparison of solid–solid phase change materials for thermal management of electronic chips in thin devices

A Copolymer of Monomethoxy Poly(ethylene glycol)‐Polycaprolactone as Form‐Stable Phase Change Materials for Thermal Energy Storage

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