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Thermodynamics behavior of phase change latent heat materials in micro-/nanoconfined spaces for thermal storage and applications

Shudong Zhang and Zhenyang Wang

Renewable and Sustainable Energy Reviews, 2018, vol. 82, issue P3, 2319-2331

Abstract: Phase change materials (PCMs), including inorganic and organic PCMs, play an important role in thermal storage and applications of both industry and academia. Several unique properties of PCMs, such as phase change temperature, latent heat, and thermal conductivity etc. are crucial parameters to control. By introducing a micro-/nanoconfined space as a restricted matrix around PCMs has recently been shown to be a reliable method to regulate and improve crucial parameters of inorganic and organic PCMs. Specially, the physical/chemical interaction occurring at the surface or interface when phase transitions are involved, has appreciable or significant influences on the thermodynamics of heterogeneous interactions. Herein, the aim of this review is to focus on recent advances in micro-/nanoconfined strategies to encapsulate PCMs and to provide the analysis about the influence of the different restricted matrixes on the crucial phase-change parameters of encapsulated PCMs. As we will discuss, confinement effect can polish and improve intrinsic drawbacks of PCMs that are impossible or difficult to be achieved by other traditional methods. Meanwhile, we will describe the surfactant micelle-based soft-template approach, electronic spinning technology, as well as the vacuum filtration method to obtain such micro-/nanoconfined systems in 1D, 2D, and 3D matrixes and discuss how the thermodynamics behavior of PCMs is enhanced by confining it in a micro-/nanoconfined container. Finally, we review the distinctive applications of the PCMs in various confined matrixes for stabilizing temperature, collecting and supplying heat for thermoelectric device and thermal rectifier.

Keywords: Phase change materials; Confinement effect; Thermodynamics behavior; Thermal storage; Micro-/nanoconfined systems (search for similar items in EconPapers)
Date: 2018
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Handle: RePEc:eee:rensus:v:82:y:2018:i:p3:p:2319-2331