Development and characterization of composite phase change material: Thermal conductivity and latent heat thermal energy storage

Trigui, A.; Karkri, Mustapha; Boudaya, Chokri; Candau, Yves; Ibos, Laurent

doi:10.1016/j.compositesb.2013.01.007

Cited by 70 publications

(22 citation statements)

References 20 publications

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“…The axial flow can be reached by keeping two opposite sample surfaces under temperature control and by minimizing lateral heat flow. For this reason, lateral thermal insulation with thermal conductivity far less than that of ETC of C-PCM sample has to be provided, or sample geometry should have a much lower thickness than the other sample dimensions, as exemplified by the setups schematically shown in Figure 3 [11,51]. Thermal losses also tend to increase with test temperature (to be kept over long times) and these tests, to the authors’ knowledge have not been performed above ~230 °C (500 K) [24].…”

Section: Methodsmentioning

confidence: 99%

“…Due to the relatively regular arrangement of phases, they can be often considered as homogeneous materials at the length scale of some pore size, with specific thermophysical properties. Further, there is no clear distinction at a millimetric or bigger length scale between composite materials and composite structure, a term that is, in any case, mostly attributed to those, widely diffused, where high-conductivity passive phase materials are in the shape of circular and longitudinal finned tubes with various configurations, rings, and brushes inserted in cavities filled by PCM [1,11,12,13,14].…”

Section: Introductionmentioning

confidence: 99%

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Methods to Characterize Effective Thermal Conductivity, Diffusivity and Thermal Response in Different Classes of Composite Phase Change Materials

2019

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The phase change materials (PCMs) used in devices for thermal energy storage (TES) and management are often characterized by low thermal conductivity, a limit for their applicability. Composite PCMs (C-PCM), which combine active phase (proper PCM) with a passive phase with high conductivity and melting temperature have thus been proposed. The paper deals with the effect of length-scale on thermal characterization methods of C-PCM. The first part of the work includes a review of techniques proposed in the scientific literature. Up to now, special focus has been given to effective thermal conductivity and diffusivity at room or low temperature, at which both phases are solid. Conventional equipment has been used, neglecting length-scale effect in cases of coarse porous structures. An experimental set-up developed to characterize the thermal response of course porous C-PCMs also during active phase transition at high temperature is then presented. The setup, including high temperature-heat flux sensors and thermocouples to be located within samples, has been applied to evaluate the thermal response of some of the above C-PCMs. Experimental test results match Finite Elements (FE) simulations well, once a proper lattice model has been selected for the porous passive phase. FE simulations can then be used to estimate temperature difference between active and passive phase that prevents considering the C-PCM as a homogeneous material, to describe it by effective thermo-physical properties. In the engineering field, under these conditions, the design steps for TES systems design cannot be simplified by considering C-PCMs as homogeneous materials in FE codes.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Methods to Characterize Effective Thermal Conductivity, Diffusivity and Thermal Response in Different Classes of Composite Phase Change Materials

2019

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“…On their side, Franquet et al [8] characterizes thermophysical properties of a cement mortar containing a phase change material. Recently PCM composite characterization was performed by Karkri et al [9][10][11][12][13][14][15][16] using two different experimental techniques: thermal energy storage properties, such as latent heat and heat capacities, were investigated using a Transient Guarded Hot Plate Technique (TGHPT), whereas thermal conductivities and diffusivities were measured using a periodic temperature method.…”

Section: Introductionmentioning

confidence: 99%

A new experimental device and inverse method to characterize thermal properties of composite phase change materials

Gossard

Karkri

Al-Maadeed

et al. 2015

Composite Structures

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“…The core technology of LHTES is phase change material (PCM). Various inorganic, organic, and mixed PCMs, such as paraffin [8,9], polyols [10,11], inorganic salts [12], and fatty acids [13], have been studied in building energy conservation. Among these materials, fatty acid is one of the most relevant organic PCMs because of its several advantages, such as large latent heat, nontoxicity, suitable phase change temperature, zero corrosion, low degree of subcooling, no or minimal volume change, and good thermal stability [14,15].…”

Section: Introductionmentioning

confidence: 99%

Preparation and Performance of Capric-Myristic Acid Binary Eutectic Mixtures for Latent Heat Thermal Energy Storages

Zhou

Liu

et al. 2019

Journal of Nanomaterials

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The capric-myristic acid (CA-MA) binary eutectic mixture phase change material (PCM) was prepared for low-temperature latent heat thermal energy storage (LHTES). The thermal properties, thermal stability, and long-term cycling reliability of the PCMs were measured. Differential scanning calorimetry results showed that the CA-MA binary eutectic mixture at the mass ratio (72/28 wt%) indicated a high-performance PCM for its suitable phase change temperature (Tm: 18.21°C, Tf: 17.40°C) and high latent heat (Hm: 148.5 J/g, Hf: 134.0 J/g). Thermal gravimetric analysis results indicated that the CA-MA binary eutectic mixture had excellent thermal stability in its operating temperature range. The thermal cycling tests and Fourier transform infrared spectroscopy results revealed that the CA-MA binary eutectic mixture had good long-term cycling thermal chemical reliability. In summary, in terms of thermal property, thermal stability, and reliability, the prepared CA-MA PCM could be applied particularly for low-temperature LHTES systems and backfill materials of ground source heat pump systems.

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Development and characterization of composite phase change material: Thermal conductivity and latent heat thermal energy storage

Cited by 70 publications

References 20 publications

Methods to Characterize Effective Thermal Conductivity, Diffusivity and Thermal Response in Different Classes of Composite Phase Change Materials

Methods to Characterize Effective Thermal Conductivity, Diffusivity and Thermal Response in Different Classes of Composite Phase Change Materials

A new experimental device and inverse method to characterize thermal properties of composite phase change materials

Preparation and Performance of Capric-Myristic Acid Binary Eutectic Mixtures for Latent Heat Thermal Energy Storages

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