A new type of heat storage system using the motion of phase change materials in an elliptical-shaped capsule

Shin, Dong Ho; Park, Jinsoo; Choi, Sung Ho; Ko, Han Seo; Karng, Sarng Woo

doi:10.1016/j.enconman.2018.12.091

Cited by 41 publications

(7 citation statements)

References 22 publications

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“…Moreover, Shin et al studied the thermal properties of a flexible elliptical-shaped capsule made of PE proposed as a PCM container for Latent heat thermal energy storage (LHTES) systems. [171] Their results found that the elliptical-shaped capsule's heat transfer rate is more than double that of a spherical capsule. Thus, the developed PCM has a significantly lower charging and discharging process time, which is a promising finding for the production of renewable energy.…”

Section: Enhancement By Polymersmentioning

confidence: 99%

Recent Progress in Polyethylene‐enhanced Organic Phase Change Composite Materials for Energy Management

Wu,

Yeo,

Wang

et al. 2023

Chemistry An Asian Journal

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Phase Change Materials (PCMs) are utilized to regulate temperature and store thermal energy in various industries such as infrastructure, electronics, solar power, and more. However, they face several limitations, such as leakage, poor thermal properties, incompatibility, as well as high flammability. Polyethylene (PE) is one of many polymers explored to enhance the desirable properties of PCMs, due to their versatile properties such as high strength, durability, chemical resistance, and low cost. The combination of PCMs and PE can be used to create composite materials, through micro/nano-encapsulation, melt-blending, formation of composites and with proper additives. They create enhanced thermal energy storage properties and in the meantime, benefited from the mechanical properties of the PE. This review provides a concise summary of the recent developments regarding PE-enhanced PCMs and provides insights into possible topics for further investigation. We summarised enhancement methods based on commonly adopted types of PEs, such as encapsulation, melt-blending, hot pressing, extrusion, and 3D printing. We then elaborate on how these PE-PCM composites are effectively utilised for heat management applications and the potential future directions in energy-saving buildings, electronic devices, and energy storage systems.

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Section: Enhancement By Polymersmentioning

confidence: 99%

Recent Progress in Polyethylene‐enhanced Organic Phase Change Composite Materials for Energy Management

Wu,

Yeo,

Wang

et al. 2023

Chemistry An Asian Journal

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“…An increase in the thermally contributing surface area can be achieved by deploying fins or expanded surfaces [136][137][138][139][140][141][142], resulting in up to a two-fold increase in the heat transfer rates [143]. A comparison between oblate elliptical capsules and spherical capsules containing PCM was conducted using COMSOL, and it was discovered that the oblate elliptical capsule melted in less time [144], attributed to a larger surface area. The experimental investigation also indicated that employing polyethylene elliptical capsules with 1-octadecanol PCM resulted in a 50% reduction in charging duration and a 35% reduction in discharging duration compared to the spherical capsules depicted in Figure 23.…”

Section: Surface Areamentioning

confidence: 99%

A Review of Phase Change Materials as a Heat Storage Medium for Cooling Applications in the Built Environment

Masood,

Haggag,

Hassan

et al. 2023

Buildings

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The air conditioning demand varies significantly in the hot and desert climates of the UAE due to diurnal temperature variation, seasonal shifts, and occupancy patterns. One of the challenges faced by the relatively higher energy-consuming UAE building stock is to optimize cooling capacity utilization and prevent excessive energy loss due to undesired cooling. A potential route to achieving such a goal involves cooling energy storage during low demand and releasing the stored cooling at peak demand times via thermal energy storage (TES). Latent heat thermal energy storage (LHTES) employing phase change materials (PCMs) provides impactful prospects for such a scheme, thus gaining tremendous attention from the scientific community. The primary goal of the current article is to provide a comprehensive state-of-the-art literature review on PCM-based TES for cooling applications to understand its efficacy, limitations, and future prospects. The article involves various applications, designs, and validations. The article emphasizes the importance of material innovations and heat transfer augmentation strategies to render this technology feasible for real-life integration into cooling systems.

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“…Approaches commonly used to solve these problems include the incorporation of nanoparticles that are capable of improving the thermal conductivity of PCM, encapsulating PCM in a stable shell, and enclosing PCM in 3D porous foams to form phase change composites (PCCs). ,, Qian et al investigated the addition of silver nanoparticles to organic PCM, by which the thermal conductivity of polyethylene glycol/diatomite composites was effectively increased . Zhao et al used porous scaffolds consisting of SiC-coated biomass carbon fibers as a thermally conductive backbone and shape stabilizer for PW, and the resulting composite PCM showed improved anisotropic heat transfer and good leakage resistance .…”

Section: Introductionmentioning

confidence: 99%

Improved Anisotropic Thermal Transfer Property of Form-Stable Phase Change Material Supported by 3D Bionic Porous Copper

Guo

Sheng

Zhu

et al. 2023

ACS Sustainable Chem. Eng.

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In response to the characteristics of low heat transfer and unstable morphology of organic phase change materials (PCMs), such as paraffin, a novel anisotropic biomimetic-structured three-dimensional porous Cu skeleton with wood texture and cell wall structure was prepared by the wood template method and was used as a support skeleton for PCMs. The bionic porous Cu maintains the porous channel structure of wood very well. Thanks to the existence of these woody cell walls and interstices, the composite PCMs show highly improved anisotropic thermal conductivity and good antileakage characteristics. The results indicate that the thermal conductivity of the composites in the vertical direction (6.7 W m −1 K −1 ) and the horizontal direction (2.3 W m −1 K −1 ) can reach up to 26.8 and 9.2 times that of paraffin wax (0.25 W m −1 K −1 ), respectively. The novel strategy provided by this work for designing anisotropic thermal conductive structures of composite PCMs presents a promising application in thermal energy storage and thermal management.

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A new type of heat storage system using the motion of phase change materials in an elliptical-shaped capsule

Cited by 41 publications

References 22 publications

Recent Progress in Polyethylene‐enhanced Organic Phase Change Composite Materials for Energy Management

Recent Progress in Polyethylene‐enhanced Organic Phase Change Composite Materials for Energy Management

A Review of Phase Change Materials as a Heat Storage Medium for Cooling Applications in the Built Environment

Improved Anisotropic Thermal Transfer Property of Form-Stable Phase Change Material Supported by 3D Bionic Porous Copper

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