Experimental and theoretical analysis of a cement mortar containing microencapsulated PCM

Franquet, Erwin; Gibout, Stéphane; Tittelein, Pierre; Zalewski, Laurent; Dumas, Jean‐Pierre

doi:10.1016/j.applthermaleng.2014.06.053

Cited by 65 publications

(46 citation statements)

References 34 publications

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“…Several techniques have been studied to enhance the heat transfer in heat sink embedded with PCM. Insertion of metal fins [2], metal foam [3], metal powder [4], using nano PCM [5], different configurations of finned tubes [6] and micro-encapsulation of the PCM [7] are included in some of the techniques. [20].…”

Section: Introductionmentioning

confidence: 99%

Constructal design of horizontal fins to improve the performance of phase change material rectangular enclosures

Kalbasi

Salimpour

2015

Applied Thermal Engineering

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Section: Introductionmentioning

confidence: 99%

Constructal design of horizontal fins to improve the performance of phase change material rectangular enclosures

Kalbasi

Salimpour

2015

Applied Thermal Engineering

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“…The method used to model the thermal behavior of the latent storage wall was presented in several articles [63][64][65]; it consists of characterizing by the inverse method the parameters required to model the heat transfer of a mortar integrating a micro-encapsulated PCM during the phase change (solid <-> liquid). To establish the state equations of the composite material (mortar + PCM), the thermodynamic behavior of the PCM could be assimilated to that of a binary solution.…”

Section: Thermal Transfer By Conduction On the Storage Wallmentioning

confidence: 99%

“…The heat stored in the storage wall integrating PCM (mortar PCM) represents the latent heat in considering both its melting and solidification. For this storage wall, c m_pcm represents the derivative of enthalpy with respect to temperature T [63,66] and is presented in Figure 9b. The following equations are used to determine the value of c m_pcm once the material temperature is known.…”

Section: Thermal Transfer By Conduction On the Storage Wallmentioning

confidence: 99%

Numerical and Experimental Investigations of Composite Solar Walls Integrating Sensible or Latent Heat Thermal Storage

et al. 2020

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This article studies a composite solar wall with latent storage (TES) designed to heat rooms inside buildings during the cold season. No numerical model of the composite solar wall is currently available in the Dymola/Modelica software library. The first objective of this work is to develop one such model. The article describes the elementary components, along with the equations that allow modeling the heat transfers and storage phenomena governing both the thermal behavior and performance of the solar wall. This model was built by assembling various existing basic elements from the software's "Building" library (e.g., models of heat transfer by convection, radiation and conduction) and then creating new elements, such as the storage element incorporating the phase change material (PCM). To validate this solar wall model, numerical results are compared to experimental data stemming from a small-scale composite solar wall manufactured in our laboratory, and the experimental set-up could be tested under real weather conditions. After verifying the level of confidence in the model, the energy performance of two solar walls, one with a conventional storage wall (sensible heat storage) the other containing a PCM (the same as in the experiment), are compared. The result indicates that the solar wall incorporating a PCM does not in this case release any more energy in the room to be heated. first assessment by E.S. Morse in the 19th century. It was subsequently redesigned as an architectural element by F. Trombe and J. Michel [11], as frequently acknowledged in published papers on: Trombe wall, Trombe-Michel solar wall, or composite solar wall. In current research dedicated to energy and environmental contexts, passive solar wall techniques are more relevant than ever, leading to the development of various passive configurations, namely: (a) the classical Trombe wall: engineering techniques [12], theoretical and experimental investigations of heat transfer [13], comparison of the effects of air flow rate between the one-dimensional and two-dimensional models [14], and the numerical study of thermal performance [15]; (b) the PCM Trombe wall: clay bricks integrating PCM macro-capsules functioning as the storage wall [16], thermal performance of a PCM storage wall in temperate and hot climates [17], a simulation study of building walls using the collector-storage wall integrating PCMs [18], a summary of the investigation and analysis conducted on systems incorporating PCMs as storage elements [19], the heat storage wall of the studied building ventilation using black paraffin wax [20], and experimental investigations of PCM wall thermal performance improved by delta winglet vortex generators [21]; (c) a composite Trombe wall with or without PCM: the numerical study of a composite Trombe wall model both with and without PCM in relying on the Dymola/Modelica software [22], numerical studies of the comparison between two walls using sensible heat (with concrete as the storage wall) by means of TRNSYS software [23], experiment...

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“…An interesting proposal was given by [178] who considered the PCM-composite to be homogeneous and isotropic, and outlined a homogenization technique that explicitly considered the superficial capsule area per unit mortar volume (expressed as a function of the volume fraction of PCM to the surrounding mortar and to the capsule diameter), employed for evaluating the composite thermal properties of the material. PCM-mortar composites were schematized as a homogeneous medium by [179], hence considering the average and isotropic properties. These authors proposed a mixed rule for accounting the mass enthalpy of a composite material (i.e., cement mortar plus the PCM).…”

Section: Macro-scale Modelsmentioning

confidence: 99%

Reviewing Theoretical and Numerical Models for PCM-embedded Cementitious Composites

2018

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Accumulating solar and/or environmental heat in walls of apartment buildings or houses is a way to level-out daily temperature differences and significantly cut back on energy demands. A possible way to achieve this goal is by developing advanced composites that consist of porous cementitious materials with embedded phase change materials (PCMs) that have the potential to accumulate or liberate heat energy during a chemical phase change from liquid to solid, or vice versa. This paper aims to report the current state of art on numerical and theoretical approaches available in the scientific literature for modelling the thermal behavior and heat accumulation/liberation of PCMs employed in cement-based composites. The work focuses on reviewing numerical tools for modelling phase change problems while emphasizing the so-called Stefan problem, or particularly, on the numerical techniques available for solving it. In this research field, it is the fixed grid method that is the most commonly and practically applied approach. After this, a discussion on the modelling procedures available for schematizing cementitious composites with embedded PCMs is reported.

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Experimental and theoretical analysis of a cement mortar containing microencapsulated PCM

Cited by 65 publications

References 34 publications

Constructal design of horizontal fins to improve the performance of phase change material rectangular enclosures

Constructal design of horizontal fins to improve the performance of phase change material rectangular enclosures

Numerical and Experimental Investigations of Composite Solar Walls Integrating Sensible or Latent Heat Thermal Storage

Reviewing Theoretical and Numerical Models for PCM-embedded Cementitious Composites

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