Study of Capric–Palmitic Acid/Clay Minerals as Form-Stable Composite Phase-Change Materials for Thermal Energy Storage

Abstract

As an important method to effectively improve energy efficiency, the study of thermal energy storage is particularly important. In this study, six types of clay mineral-based form-stable phase-change materials (FSPCMs) were prepared by the vacuum adsorption method. The adsorption capacity of vermiculite and diatomite was satisfactory, and sepiolite showed the worst adsorption capacity. Clay minerals can delay the thermal decomposition rate of capric–palmitic acid (CA–PA), and the specific surface area and pore capacity of clay minerals all decrease dramatically after the clay minerals have absorbed CA–PA. FSPCMs exhibited a higher heat storage and release efficiency and reflects a certain temperature control performance. In addition, only physical adsorption between the CA–PA and the clay material occurred, and no chemical reaction occurred. Finally, FSPCMs still have high latent heat of phase transition, and they can be used for low-temperature thermal energy storage.

Fabrication and evaluation of polyurethane supported form‐stable PCMs

“…Among the non‐paraffins group, an interest has been raised in one member of this group known as “fatty acids” owning to several points of merit including favorable high latent heat storage density, congruent melting behaviour, good long‐term thermal stability, no or negligible supercooling degree, non‐toxic nature and biocompatibility, high surface tension that allows their impregnation into a host material, readily available in nature; derived from vegetable and animal oils ensuring uninterrupted regulated supply despite the shortage or fluctuation in the price of fuel. They are found to be extensively useful in the cosmetic industry, food industry, building construction, and so on 4‐7 …”

“…They are found to be extensively useful in the cosmetic industry, food industry, building construction, and so on. [4][5][6][7] The individual properties of this PCM type are governed by the length of carbon chain atoms, the longer the chain length, the higher the melting temperature and latent heat density. 8 In addition, their operating phase transition can be customized according to the end requirement by the formation of eutectic mixtures through the blending of two or more fatty acids in different mass ratios and hence they could be resourceful in thermal management for wide application in the field of textiles, constructions, packaging, electronic devices, and so on.…”

Miscanthus-Derived Energy Storage System Material Production

“…TES has an important role to play in renewable energy storage systems . Among the other TES technologies, latent heat storage based on phase change materials (PCM) are considered to be the most promising technology due to their high energy storage density and cost effectiveness. − Although liquid–solid PCM based TES has many advantages, leakage of the PCM out of the supporting material during its phase transition is a problem that requires further research and development work for improvement. , Biomass-based highly porous carbon materials can be used to encapsulate PCM to address the leakage problem.…”

Study on the Enhancement Effect of Synergy between Multi-Size Functionalized Boron Nitride and Graphene Oxide on the Thermal Properties of Phase Change Composites

“…Lei et al [23] prepared PEG/cellulose/BNNS composites by vacuum impregnation and cold compression using the self-assembled properties of concentrated cellulose/BNNS aqueous blends, taking full advantage of the efficient orientation and high in-plane thermal conductivity of BNNS during cold compression, and obtained composites with a thermal conductivity of 4.764 W/(m•K), which was about 14 times higher, and with good shape stability, maintaining their original shape at 101 • C. Some scholars have pointed out that the thermal resistance between materials is mainly caused by inherent phonon spectral mismatch. Only the filler surface is functionalized, and the energy of lattice vibration is still reduced by differences in the acoustic properties and dispersed at the interfaces between materials [24][25][26][27][28][29]. Therefore, the degree of matching between fillers should be fully considered.…”