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Phase Change Materials for Thermal Energy Applications

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "D1: Advanced Energy Materials".

Deadline for manuscript submissions: closed (31 July 2020) | Viewed by 5439

Special Issue Editor


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Guest Editor
Department of Energy Technology, KTH Royal Institute of Technology, Brinellvägen 68, 100 44 Stockholm, Sweden
Interests: energy storage; PCM; phase change materials; absorption cooling; district energy

Special Issue Information

Dear Colleagues,

Thermal energy application relates to heating demands as well as the demand for cooling. It includes industrial, as well as comfort and domestic thermal applications. Many of our thermal energy demands are presently serviced by electricity as the energy carrier (e.g., for running chillers to provide cooling) and are often responsible for high peaks in our electricity network. Storage represents a key solution to alleviating these peaks and, also, to enable the large-scale penetration of fluctuating solar and wind in our electricity generation mix. Here, the recent societal focus has primarily been on battery technologies, whereas thermal energy storage has the potential to be cheaper and more functional for many applications.

One particular type of thermal energy storage involves using so-called phase change materials (PCMs), where the latent heat involved in the phase change (with liquid–solid phase change most commonly proposed) allows for storing heat or cold at a high energy density per unit volume and weight. The thermal energy is also stored at a constant temperature during the phase change. These aspects make the incorporation of PCMs very attractive for many thermal applications.

The Special Issue “Phase Change Materials for Thermal Energy Applications” seeks to highlight the state of the art regarding high energy density thermal management using PCMs for a wide variety of applications. Topics of interest include, but are not limited to, PCMs as applied to:

  • Distributed storage solutions;
  • District heating and cooling;
  • Power to heat and power to cold;
  • Concentrating solar power;
  • Agricultural applications, including thermal management in greenhouses;
  • Industrial applications, including surplus heat utilization;
  • Demand-side management for buildings.

The applications, and aspects related to the integration of PCM technology in these, should be at the center of attention of submitted papers.

Prof. Dr. Viktoria E. Martín
Guest Editor

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. Energies is an international peer-reviewed open access semimonthly 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 2600 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

  • phase change materials
  • PCM
  • thermal energy
  • thermal energy storage
  • thermal management
  • efficiency
  • heating
  • cooling
  • heat transfer
  • energy density
  • power
  • technoeconomic feasibility

Published Papers (2 papers)

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Research

18 pages, 7487 KiB  
Article
Reduced Model and Comparative Analysis of the Thermal Performance of Indirect Solar Dryer with and without PCM
by Camilo Ramirez, Mario Palacio and Mauricio Carmona
Energies 2020, 13(20), 5508; https://doi.org/10.3390/en13205508 - 21 Oct 2020
Cited by 12 | Viewed by 2180
Abstract
A thermal model is proposed to analyze the performance of an indirect solar dryer (ISD) with latent heat storage using phase change material (PCM). The estimations are compared with experimental data presented in the scientific literature taken in real conditions. The validated thermal [...] Read more.
A thermal model is proposed to analyze the performance of an indirect solar dryer (ISD) with latent heat storage using phase change material (PCM). The estimations are compared with experimental data presented in the scientific literature taken in real conditions. The validated thermal model is used in order to address a comprehensive analysis of the performance of the ISDs under the same operation conditions, the model is able to estimate the temperatures of glass cover, absorber plate, PCM, useful heat, thermal and storage efficiencies, and variables that are difficult to measure experimentally such as liquid fraction, heat losses, and accumulated energy of the ISDs. Three study cases are considered: Case 1 consists of two collectors with and without alternating nocturnal and diurnal operation (benchmarking case). Case 2 and 3 consist in a unique collector operating continuously for 24 h with PCM and without PCM, respectively. It was determined that the use of PCM in ISD increased the night thermal performance and extended the operational time of the system. On the other hand, results indicate that the use of two alternating collectors presents similar discharge behavior to using one collector with PCM operating continuously. Concerning the overall thermal performance, cases 1, 2, and 3 obtained thermal efficiencies of 20%, 28%, and 24%, respectively. Full article
(This article belongs to the Special Issue Phase Change Materials for Thermal Energy Applications)
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23 pages, 3647 KiB  
Article
Characterization of Thermophysical Properties of Phase Change Materials Using Unconventional Experimental Technologies
by Arnold Martínez, Mauricio Carmona, Cristóbal Cortés and Inmaculada Arauzo
Energies 2020, 13(18), 4687; https://doi.org/10.3390/en13184687 - 09 Sep 2020
Cited by 19 | Viewed by 2854
Abstract
The growing interest in developing applications for the storage of thermal energy (TES) is highly linked to the knowledge of the properties of the materials that will be used for that purpose. Likewise, the validity of representing processes through numerical simulations will depend [...] Read more.
The growing interest in developing applications for the storage of thermal energy (TES) is highly linked to the knowledge of the properties of the materials that will be used for that purpose. Likewise, the validity of representing processes through numerical simulations will depend on the accuracy of the thermal properties of the materials. The most relevant properties in the characterization of phase change materials (PCM) are the phase change enthalpy, thermal conductivity, heat capacity and density. Differential scanning calorimetry (DSC) is the most widely used technique for determining thermophysical properties. However, several unconventional methods have been proposed in the literature, mainly due to overcome the limitations of DSC, namely, the small sample required which is unsuitable for studying inhomogeneous materials. This paper presents the characterization of two commercial paraffins commonly used in TES applications, using methods such as T-history and T-melting, which were selected due to their simplicity, high reproducibility, and low cost of implementation. In order to evaluate the reliability of the methods, values calculated with the proposed alternative methods are compared with the results obtained by DSC measurements and with the manufacturer’s technical datasheet. Results obtained show that these non-conventional techniques can be used for the accurate estimation of selected thermal properties. A detailed discussion of the advantage and disadvantage of each method is given. Full article
(This article belongs to the Special Issue Phase Change Materials for Thermal Energy Applications)
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