Special Issue "Phase Change Materials (PCMs) for Heat Storage in Building Applications"

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

Deadline for manuscript submissions: 15 April 2021.

Special Issue Editors

Dr. Laura Fedele
Website SciProfiles
Guest Editor
Construction Technologies Institute, CNR, Italian National Research Council, Padova 35127, Italy
Interests: HVAC&R applications; nanofluids; PCMs; energy savings
Special Issues and Collections in MDPI journals
Dr. Sergio Bobbo
Website
Guest Editor
Institute of Construction Technologies, National Research Council, I–35127 Padova, Italy
Interests: low GWP refrigerants; PCMs; nanofluids; thermophysical properties; HVACR applications

Special Issue Information

Dear Colleagues,

We are inviting submissions to a Special Issue of Energies on the subject area of “Phase Change Materials (PCMs) for Heat Storage in Building Applications”. PCMs offer important opportunities to increase the thermal efficiency of buildings by reducing the peak power for heating and cooling, allowing better management of shift peak in heating and cooling or optimizing the coupling with renewable energies.

This Special Issue will deal with formulations of PCMs, their properties and their applications in both heating and cooling plants and building construction materials. Topics of interest for publication include, but are not limited to the following:

  • PCMs materials, also with nanostructures (NEPCMs)
  • Thermal and physical properties of PCMs and NEPCMs
  • Heat transfer
  • Technologies to apply PCMs (e.g., microencapsulation, embedding in construction materials, etc.)
  • Applications of PCMs in buildings (construction materials (passive), thermally activated constructions, glazing and shading devices, combined with ventilation and air-conditioning)
  • Heat storage and renewable energy systems
  • Energy analysis
Dr. Laura Fedele
Dr. Sergio Bobbo
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 papers will be 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 1800 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 (PCMs)
  • Nanostructure-enhanced PCMs (NEPCMs)
  • Thermophysical properties
  • Heat storage
  • Buildings
  • Energy efficiency

Published Papers (2 papers)

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Research

Open AccessArticle
Experimental and Numerical Study on Energy Piles with Phase Change Materials
Energies 2020, 13(18), 4699; https://doi.org/10.3390/en13184699 - 09 Sep 2020
Abstract
Phase change materials (PCM) utilization in energy storage systems represents a point of interest and attraction for the researchers to reduce greenhouse gas emissions. PCM have been used widely on the interior or exterior walls of the building application to optimize the energy [...] Read more.
Phase change materials (PCM) utilization in energy storage systems represents a point of interest and attraction for the researchers to reduce greenhouse gas emissions. PCM have been used widely on the interior or exterior walls of the building application to optimize the energy consumption during heating and cooling periods. Meanwhile, ground source heat pump (GSHP) gained its popularity because of the high coefficient of performance (COP) and low running cost of the system. However, GSHP system requires a stand-by heat pump during peak loads. This study will present a new concept of energy piles that used PCM in the form of enclosed tube containers. A lab-scaled foundation pile was developed to examine the performance of the present energy pile, where three layers of insulation replaced the underground soil to focus on the effect of PCM. The investigation was conducted experimentally and numerically on two identical piles with and without PCM. Moreover, a flow rate parametric study was conducted to study the effect of the working fluid flow rate on the amount of energy stored and released at each model. Finally, a comprehensive Computational fluid dynamic (CFD) model was developed and compared with the experimental results. There was a good agreement between the experimental measurements and the numerical predictions. The results revealed that the presence of PCM inside the piles increased not only the charging and discharging capacity but also the storage efficiency of the piles. It was found that PCM enhances the thermal response of the concrete during cooling and heating processes. Although increasing the flow rate increased charging and discharging capacity, the percentage of energy stored/released was insignificant compared to the flow rate increasing percentage. Full article
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Open AccessArticle
Insight into Foam Pore Effect on Phase Change Process in a Plane Channel under Forced Convection Using the Thermal Lattice Boltzmann Method
Energies 2020, 13(15), 3979; https://doi.org/10.3390/en13153979 - 02 Aug 2020
Abstract
In this work, the two-dimensional laminar flow and the heat transfer in an open-ended rectangular porous channel (metal foam) including a phase change material (PCM; paraffin) under forced convection were numerically investigated. To gain further insight into the foam pore effect on charging/discharging [...] Read more.
In this work, the two-dimensional laminar flow and the heat transfer in an open-ended rectangular porous channel (metal foam) including a phase change material (PCM; paraffin) under forced convection were numerically investigated. To gain further insight into the foam pore effect on charging/discharging processes, the Darcy–Brinkmann–Forchheimer (DBF) unsteady flow model and that with two temperature equations based on the local thermal non-equilibrium (LTNE) were solved at the representative elementary volume (REV) scale. The enthalpy-based thermal lattice Boltzmann method (TLBM) with triple distribution function (TDF) was employed at the REV scale to perform simulations for different porosities (0.7ε0.9) and pore per inch (PPI) density (10PPI60) at Reynolds numbers (Re) of 200 and 400. It turned out that increasing Re with high porosity and PPI (0.9 and 60) speeds up the melting process, while, at low PPI and porosity (10 and 0.7), the complete melting time increases. In addition, during the charging process, increasing the PPI with a small porosity (0.7) weakens the forced convection in the first two-thirds of the channel. However, the increase in PPI with large porosity and high Re number limits the forced convection while improving the heat transfer. To sum up, the study findings clearly evidence the foam pore effect on the phase change process under unsteady forced convection in a PCM-saturated porous channel under local thermal non-equilibrium (LTNE). Full article
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Planned Papers

The below list represents only planned manuscripts. Some of these manuscripts have not been received by the Editorial Office yet. Papers submitted to MDPI journals are subject to peer-review.

Title: Numerical Modeling of Melting in a Rectangular Duct Satured with a Porous Medium under Forced Convection
Authors: R. Mabrouk 1, H. Naji 2,*, H. Dhahri 1 and Z. Younsi 1
Affiliation: 1 École Nationale d’Ingénieurs de Monastir, Laboratoire d’Études des Systèmes Thermiques et Énergétiques (LESTE), Tunisia, Rue Ibn El Jazza, 5019 Monastir, Tunisie 2 Univ. Artois, Univ. Lille, Yncréa-HEI, IMT Lille-Douai, Laboratoire Génie Civil & géo-Environnement (ULR 4515), Technoparc Futura, F-62400 Béthune, France * Correspondence: [email protected]
Abstract: This work numerically investigates the melting of a phase change material (PCM) embedded into metallic porous foam in a straight duct where forced convection prevails. The thermal lattice Boltzmann method (TLBM) with three distribution functions is adopted to simulate the unsteady convective flow using the Brinkman-Forchheimer-Darcy (BFD) model. In this method, the fluid consists of a particles' number that stream and interact in certain specified directions depending on the lattice structure. The two-equation energy model is used here to handle the local thermal non-equilibrium (LTNE) that occurs between fluid and solid phases. The flow is unsteady, incompressible, and 2D. In addition, the fluid-saturated porous medium is considered homogeneous, isotropic, non-deformable, and in LTNE with the fluid. Thereby, such a problem is modeled by considering the generalized dimensionless Navier-Stokes equations for a porous media at the representative element volume (REV). The problem formulation is completed by appropriate boundary and initial conditions and by the enthalpy-porosity model to compute the PCM liquid fraction. Note that the solid PCM has a melting temperature (Tm

Title: Experimental study on the implementation of macroencapsulated (or flat slab) PCM in different configurations
Authors: Prof. Dr. Luisa F. Cabeza
Affiliation: GREA Innovació Concurrent, Universitat de Lleida, Pere de Cabrera s/n, 25001 Lleida, Spain

Title: Experimental and Numerical Study on Energy Piles with Phase Change Materials
Authors: Magdy Mousa 1, Ayman Bayomy 1, Seth Dworkin 1 and M. Ziad Saghir1, *
Affiliation: 1 Department of Mechanical and Industrial Engineering, Ryerson University, 350 Victoria St, Toronto, , ON, Canada; [email protected], [email protected], [email protected], [email protected] . * Correspondence: [email protected]
Abstract: Phase change materials (PCMs) can absorb, store and release large amount of energy without any significant temperature change due to high latent heat. This feature allows PCMs to become an attractive element for energy storage systems. PCM have been used widely on the interior or exterior walls of the building application to decrease the energy consumption during heating and cooling periods. Meanwhile, ground source heat pump (GSHP) gained its popularity due to the advantages of greenhouse gas (GHG) reduction. However; GSHP system has some limitations in terms of cost, performance and drilling space. This study presents an innovative concept of energy piles, as a PCMs tube containers were used inside a lab-scaled building foundation pile. The investigation was conducted experimentally and numerically on three identical piles with different amounts of PCMs. Furthermore, a parametric study was conducted to study the effect of the working fluid flow rate on the amount of energy stored and released at each sample. An extensive CFD model was developed and compared with the experimental data. The numerical results were in good agreement with the experimental data. The results revealed that increases in PCMs volume inside the pile enhance storing capacity, concrete thermal response and storage efficiency of the piles. Although, increasing the flow rate increased the amount of energy stored and released, the percentage increase on the energy stored and released was insignificant compared to the percentage increase on the flow rate. Keywords: PCMs; GSHP; thermal storage; energy piles; borehole

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