Thermal shielding of multilayer walls with phase change materials under different transient boundary conditions

Mathieu-Potvin, François; Gosselin, Louis

doi:10.1016/j.ijthermalsci.2009.01.010

Cited by 48 publications

(24 citation statements)

References 20 publications

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“…It was observed that for better performance, the location of the PCM in the building envelope plays an important role and can result in the reduction of energy consumption in the building for all months of the year. Mathiev-Potvin and Gosselin [13] carried out a numerical analysis of 10 cm thick wall with a 0.5 cm thick PCM slab located between the wall. The result shows that heat flux through the PCM-integrated wall was minimum when the PCM was located close to the center of the wall and the PCM melting point was close to the preferred temperature inside the room.…”

Section: Introductionmentioning

confidence: 99%

Thermal Performance Analysis of Multi-Phase Change Material Layer-Integrated Building Roofs for Energy Efficiency in Built-Environment

2017

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Thermal energy storage using phase change materials (PCMs) plays a significant role in maintaining thermal comfort and reducing energy consumption in a building because of its ability to absorb/release heat within small temperature variations. In this paper, the thermal performance of roofs has been investigated based on various factors like the integration of a single PCM layer, integration of a double PCM layer, the thickness of the PCM, phase transition temperature and heat of fusion of the PCM. The analysis shows that integration of a single PCM layer of different thickness and phase transition temperature and heat of fusion in roof structures is unable to maintain a comfortable constant temperature inside the building due to incomplete solidification and melting of the PCM. However, the analysis shows that with multi-PCM layers of appropriate thickness it is possible to maintain a constant comfortable temperature of about 28 • C in the building throughout the day in Chennai, India. The analysis also shows that there is reduction in heat gain by 17 to 26% for a single PCM layered roof and 25 to 36% for a double PCM layered roof compared to the roof without PCM layer for the different months of the year.

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Section: Introductionmentioning

confidence: 99%

Thermal Performance Analysis of Multi-Phase Change Material Layer-Integrated Building Roofs for Energy Efficiency in Built-Environment

2017

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“…The main researches concern the thermal behavior of plates and hollow cylinders in contact with a fluid [2][3][4], phase change storage system of solar energy [5][6][7] and multilayer building walls containing a PCM layer [8]. In the latter case, many studies regard the evaluation of the influence of PCM thermophysical properties and of the PCM thickness on the dynamic thermal characteristics [9][10][11][12][13][14] for different locations.…”

Section: Introductionmentioning

confidence: 99%

Experimental validation of the exact analytical solution to the steady periodic heat transfer problem in a PCM layer

Mazzeo

Oliveti

Gracia

et al. 2017

Energy

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Phase change materials (PCM) are used in many industrial and residential applications for their advantageous characteristic of high capacity of latent thermal storage by means of an isothermal process. In this context, it is very useful to have predictive mathematical models for the analysis of the thermal performance and the thermal design of these layers. In this work, an experimental validation of an analytical model that resolves the steady periodic heat transfer problem in a finite layer of PCM is presented. The experimental investigation was conducted employing a PCM with thermophysical and thermochemical behavior very close to those hypothesized in the formulation of the analytical model. For the evaluation of the thermophysical properties of the PCM sample used, an experimental procedure created by the authors was employed. In all tests realized in a sinusoidal and non-sinusoidal periodic regime, the comparison between the measured and calculated trends of the temperature at different sample heights and of the surface heat fluxes show an excellent agreement. Moreover, also having verified the analytical total stored energy, the analytical model constitutes a valid instrument for the evaluation of the latent and sensible contribution and the trend in time of the position of the bi-phase interface.

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“…Through a numerical model, a single PCM layer was optimized for the climatic conditions of Quebec City, Canada, as shown in Figure 1A. The study reported that PCM is functional only when there exists a lesser temperature difference between outdoors and indoors [17]. A sandwich wall configuration as shown in Figure 1B [18] was studied to determine the effect of the melting point of PCMs on energy saving.…”

Section: Introductionmentioning

confidence: 99%

“…Previously investigated configurations of integrating phase change materials (PCMs) in wall sections, namely: (A) a thin layer of PCM between two layers of insulation tested in Quebec City, Canada [17]; (B) two layers of PCM impregnated wallboards applied as an exterior and an interior layer with thick insulation in-between, tested in a continental climate [18]; (C) a PCM and an air cavity layer contained between two concrete blocks, tested in the cold climate of South East England, UK [19]; (D) a PCM layer installed near the internal wallboard having multi-layers of insulation boards and sheathing towards the exterior, tested in Kansas, USA [20]; (E) various configurations of gypsum wallboard, cardboard, PCM layer, insulation layer and OSB layer, tested in Kansas, USA [21]; and (F) a simple wall assembly of brick and concrete, applying a PCM layer in-between, tested in West Algeria [22]. Previously investigated configurations of integrating phase change materials (PCMs) in wall sections, namely: (A) a thin layer of PCM between two layers of insulation tested in Quebec City, Canada [17]; (B) two layers of PCM impregnated wallboards applied as an exterior and an interior layer with thick insulation in-between, tested in a continental climate [18]; (C) a PCM and an air cavity layer contained between two concrete blocks, tested in the cold climate of South East England, UK [19]; (D) a PCM layer installed near the internal wallboard having multi-layers of insulation boards and sheathing towards the exterior, tested in Kansas, USA [20]; (E) various configurations of gypsum wallboard, cardboard, PCM layer, insulation layer and OSB layer, tested in Kansas, USA [21]; and (F) a simple wall assembly of brick and concrete, applying a PCM layer in-between, tested in West Algeria [22].…”

Section: Introductionmentioning

confidence: 99%

Effect of Phase Change Materials (PCMs) Integrated into a Concrete Block on Heat Gain Prevention in a Hot Climate

et al. 2016

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In the current study, a phase change material (PCM) contained in an insulated concrete block is tested in extremely hot weather in the United Arab Emirates (UAE) to evaluate its cooling performance. An insulated chamber is constructed behind the block containing PCM to mimic a scaled down indoor space. The effect of placement of the PCM layer on heat gain indoors is studied at two locations: adjacent to the outer as well as the inner concrete layer. The inclusion of PCM reduced heat gain through concrete blocks compared to blocks without PCM, yielding a drop in cooling load indoors. The placement of PCM and insulation layers adjacent to indoors exhibited better cooling performance compared to that adjacent to the outdoors. In the best case, a temperature drop of 8.5% and a time lag of 2.6 h are achieved in peak indoor temperature, rendering a reduction of 44% in the heat gain. In the tested hot climate, the higher ambient temperature and the lower wind speed hampered heat dissipation and PCM re-solidification by natural ventilation. The findings recommend employing a mechanical ventilation in hot climates to enhance regeneration of the PCM to solid state for its optimal performance.

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Thermal shielding of multilayer walls with phase change materials under different transient boundary conditions

Cited by 48 publications

References 20 publications

Thermal Performance Analysis of Multi-Phase Change Material Layer-Integrated Building Roofs for Energy Efficiency in Built-Environment

Thermal Performance Analysis of Multi-Phase Change Material Layer-Integrated Building Roofs for Energy Efficiency in Built-Environment

Experimental validation of the exact analytical solution to the steady periodic heat transfer problem in a PCM layer

Effect of Phase Change Materials (PCMs) Integrated into a Concrete Block on Heat Gain Prevention in a Hot Climate

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