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Processes
Special Issues
Innovations in Phase-Change Materials for High-Temperature Heat Storage
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Innovations in Phase-Change Materials for High-Temperature Heat Storage

A special issue of Processes (ISSN 2227-9717). This special issue belongs to the section "Materials Processes".

Deadline for manuscript submissions: 15 August 2024 | Viewed by 342

Special Issue Editors

Prof. Dr. Hideki Kita

E-Mail Website
Guest Editor
Graduate School of Engineering Chemical Systems Engineering, Nagoya University, Nagoya 464-8601, Japan
Interests: manufacturing technology; machine elements and tribology; nanotechnology; materials; exergy analysis; ceramics and the process
Dr. Seiji Yamashita

E-Mail Website
Guest Editor
Department of Materials Process Engineering, Graduate School of Engineering, Nagoya University, Nagoya 464-8601, Japan
Interests: powder technology; ceramics process; statistical analysis

Special Issue Information

Dear Colleagues,

The amount of waste heat emitted from automobiles and industrial furnaces is immense. To recover and effectively utilize such waste heat, heat storage materials are indispensable. In addition to waste heat, thermal storage technology is also essential for Carnot batteries and solar thermal power generation.

Thermal storage technology can be classified into sensible heat storage, latent heat storage, and chemical heat storage, with latent heat storage technology attracting attention due to its high energy density and simple structure.

Various materials can be used for low- to medium-temperature (100–200 °C) heat storage, and practical applications are in progress. On the other hand, high-temperature heat above 500 °C has high potential for effective use as thermal energy, but there are many difficulties in integrating it with materials and capsules, and its practical application has not progressed. For this Special Issue, we particularly welcome papers on phase change materials (PCM), shell materials to hold PCMs, sealing technology for integration, and system applications, such as Carnot batteries, regenerative burner industrial furnaces, and solar thermal power generation using heat storage.

Prof. Dr. Hideki Kita
Dr. Seiji Yamashita
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Processes is an international peer-reviewed open access monthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2400 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • heat storage
  • phase-change material (PCM)
  • exergy
  • core–shell
  • ceramics
  • thermal storage
  • encapsulated phase-change material (EPCM)
  • high temperature

Published Papers (1 paper)

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Research

13 pages, 4860 KiB  
Article
Development of Macro-Encapsulated Phase-Change Material Using Composite of NaCl-Al2O3 with Characteristics of Self-Standing
by Shenghao Liao, Xin Zhou, Xiaoyu Chen, Zhuoyu Li, Seiji Yamashita, Chaoyang Zhang and Hideki Kita
Processes 2024, 12(6), 1123; https://doi.org/10.3390/pr12061123 - 29 May 2024
Viewed by 194
Abstract
Developing thermal storage materials is crucial for the efficient recovery of thermal energy. Salt-based phase-change materials have been widely studied. Despite their high thermal storage density and low cost, they still face issues such as low thermal conductivity and easy leaks. Therefore, a [...] Read more.
Developing thermal storage materials is crucial for the efficient recovery of thermal energy. Salt-based phase-change materials have been widely studied. Despite their high thermal storage density and low cost, they still face issues such as low thermal conductivity and easy leaks. Therefore, a new type of NaCl-Al2O3@SiC@Al2O3 macrocapsule was developed to address these drawbacks, and it exhibited excellent rapid heat storage and release capabilities and was extremely stable, significantly reducing the risk of leakage at high temperatures for industrial waste heat recovery and in concentrated solar power systems above 800 °C. Thermal storage macrocapsules consisted of a double-layer encapsulation of silicon carbide and alumina and a self-standing core of NaCl-Al2O3. After enduring over 1000 h at a high temperature of 850 °C, the encapsulated phase-change material exhibited an extremely low weight loss rate of less than 5% compared with NaCl@Al2O3 and NaCl-Al2O3@Al2O3 macrocapsules, for which the weight loss rate was reduced by 25% and 10%, respectively, proving their excellent leakage prevention. The SiC powder layer, serving as an intermediate coating, further prevented leakage, while the use of Al2O3 ceramics for encapsulation enhanced the overall mechanical strength. It was innovatively discovered that the Al2O3 particles formed a network structure around the molten NaCl, playing an important role in maintaining the shape and preventing leakage of the composite thermal storage phase-change material. Furthermore, the addition of Al2O3 significantly enhanced the rapid heat storage and release rate of NaCl-Al2O3 compared to pure NaCl. This encapsulated phase-change material demonstrated outstanding durability and rapid heat storage and release performance, offering an innovative approach to the application of salt phase-change materials in the field of high temperature rapid heat storage and release and encapsulating NaCl as a high-temperature thermal storage material in a packed bed system. Compared with conventional salt-based phase-change materials, the developed product is expected to significantly improve the reliability and thermal efficiency of thermal storage systems. Full article
(This article belongs to the Special Issue Innovations in Phase-Change Materials for High-Temperature Heat Storage)
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