Experimental and multi-scale analysis of the thermal properties of Portland cement concretes embedded with microencapsulated Phase Change Materials (PCMs)

Eddhahak-Ouni, Anissa; Drissi, Sarra; Colin, Johan; Néji, Jamel; Caré, Sabine

doi:10.1016/j.applthermaleng.2013.11.050

Cited by 174 publications

(68 citation statements)

References 11 publications

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“…Then the ratio method was used in order to deduce the specific heat. For further details regarding the methodology of the Cp measurement, the readers could consult the work of [14]. …”

Section: Measurements Of Dsc Heat Flux and Specific Heatmentioning

confidence: 99%

“…Later on, Hunger et al, [13] used microencapsulated PCMs in selfcompacting concrete and studied their effect on the concrete behavior. Recently, Eddhahak et al [14] worked on the effect of PCMs when incorporated in cement Portland concrete and used a multi-scale approach to evaluate the thermal properties of the PCM-concrete. The main conclusions drawn from these works can be summarized in the improvement of the heat storage capacity of the PCM-concrete on the one hand, and the loss of its mechanical strength with the addition of PCMs on the other one.…”

Section: Introductionmentioning

confidence: 99%

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Thermal analysis by DSC of Phase Change Materials, study of the damage effect

Drissi

Eddhahak

Caré

et al. 2015

Journal of Building Engineering

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is an open access repository that collects the work of Arts et Métiers ParisTech researchers and makes it freely available over the web where possible. a b s t r a c tThis paper deals with an experimental study of Phase Change Materials (PCMs) by DSC and focuses particularly on the influence of PCMs damage on their thermodynamic properties. First, different series of tests were performed on non-damaged PCMs (reference) using different masses and heating rates in order to optimize the choice of the experimental parameters used in DSC test. Accordingly, the specific heats at solid, liquid phases and the latent heats of PCMs were obtained. In addition, a fast approximate approach was suggested for the determination of the heat capacity of PCMs from a direct exploitation of the heat flux curves obtained by scanning PCMs at different heating rates. Finally, damaged PCMs were investigated and their thermal properties (specific heat and phase change enthalpy) were compared to the reference PCMs. It was shown from the obtained results that low heating rates are more suitable for PCMs scanning during DSC measurements in order to ensure a thermodynamic equilibrium within the sample. Furthermore, the results highlighted that damage of PCMs can lead to the loss of their specific heat capacity of about 28% compared to the non-damaged PCMs.

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“…Then the ratio method was used in order to deduce the specific heat. For further details regarding the methodology of the Cp measurement, the readers could consult the work of [14]. …”

Section: Measurements Of Dsc Heat Flux and Specific Heatmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Thermal analysis by DSC of Phase Change Materials, study of the damage effect

Drissi

Eddhahak

Caré

et al. 2015

Journal of Building Engineering

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“…One of the most effective 'active methods' to reduce a building's energy consumption is to incorporate a phase change material (PCM) as an additive into the desired building component. The building components used for the incorporation of PCM have ranged from actual cement powder [6], mortar [7] concrete [8], plastering mortar [9] and many others [10,11,12]. PCM's have high latent heat storage densities and can, therefore, absorb thermal energy when transforming from solid to liquid or release it when turning back to solid [13].…”

Section: Introductionmentioning

confidence: 99%

Development and optimisation of phase change material-impregnated lightweight aggregates for geopolymer composites made from aluminosilicate rich mud and milled glass powder

Kastiukas

Zhou

Castro-Gomes

2016

Construction and Building Materials

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h i g h l i g h t sPCM vacuum impregnation is very successful for expanded clay lightweight aggregate. Polyester resin coating is able to retain all of the impregnated PCM from leakage. Resin coating is chemically stable and neutral, also improving thermal conductivity. Novel combination of geopolymer and thermal energy storing aggregates evaluated. ME-LWA has a high energy storage capacity of 157 J/g. a r t i c l e i n f o a b s t r a c tMacro-encapsulated aggregates (ME-LWAs) consisting of expanded clay lightweight aggregates (LWAs) impregnated with a paraffin wax phase change material (PCM) was produced. To fully exploit the thermal energy retaining properties of PCM, it is fundamental to retain as much of the PCM as possible within the pores of the LWA. This paper investigates 3 different commercial materials to create a total of 14 different coating regimes to determine the most efficient coating method and material regarding its ability at retaining the PCM. The ME-LWAs are then further used as aggregates in geopolymer binders made from a combination of aluminosilicate rich mud and waste glass. Physical properties such as thermal conductivity and mechanical strength are determined for the geopolymer binder with and without the addition of the ME-LWA. A polyester resin was determined to be the most suitable choice of coating material for the ME-LWA, producing a practically leak-proof coating. The ME-LWA was also determined to be chemically neutral, showed a 42% higher thermal conductivity than the LWA in their raw state and maintained a latent heat of 57.93 J/g before and after being used in the geopolymer binder. Carbon fibres and graphite spray were used to improve the thermal conductivity of the resin coating, however no significant increase was detected. Finally, the compressive strength and thermal conductivity results achieved are acceptable for applications in buildings for enhancement of their energy efficiency.

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“…Paraffin is an organic PCM with melting temperatures ranging between 20 o C and 70 o C. A number of researchers ( [2], [3] and [4]) have carried out thermal energy storage studies that combined paraffin with concrete. Generally from a review of studies that considered PCM/concrete composites, paraffin appears to be the most common choice of PCM as it is inactive in an alkaline medium, chemically stable and relatively inexpensive.…”

Section: Introductionmentioning

confidence: 99%