Building bricks with phase change material (PCM): Thermal performances

Mahdaoui, Mustapha; Hamdaoui, Said; Msaad, Abdelouahad Ait; Kousksou, T.; Rhafiki, T. El; Jamil, A.; Ahachad, M.

doi:10.1016/j.conbuildmat.2020.121315

Cited by 106 publications

(26 citation statements)

References 38 publications

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“…This unique property makes PCMs constantly work in a cycle. As a result, PCM is an ideal candidate for an assortment of daily applications that require temperature regulation and management, for instance, building construction, [8][9][10][11] HVAC system, [12][13][14] thermal energy storage, [15][16][17] etc. PCMs are utilized in these applications mainly for energy saving, but they are also eco-friendly.…”

Section: Phase Change Materialsmentioning

confidence: 99%

Salt hydrates as phase change materials for photovoltaics thermal management

Choo

Wei

2021

Energy Science & Engineering

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Conventional source of energy, for example fossil fuels, are depleting with time. The combustion of fossil fuels also lead to increased carbon emission in environment, causing global warming. To meet the world's increasing energy demand, the utilization of alternative resources like solar energy must be improved. Solar energy can be harvested directly into electricity by using photovoltaic (PV) module. However, when the solar radiation reaches a PV module, it is not only converted into electricity but also into thermal energy, which increases the PV system temperature. 1 There are many factors affecting the solar power output of the PV system. Temperature is one of them. The productivity of a PV-module is the inverse of the temperature. According to the Standard Test Conditions, if a PV module is operated at temperature higher than the ambient temperature, 25°C, at each increase of degree Celsius, the conversion rate of the PV module decreases, up to 0.5%. 2 As expected, summer is the season with the highest solar radiation, when a PV system such as solar panel can absorb most solar energy and produce heat or electricity

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Section: Phase Change Materialsmentioning

confidence: 99%

Salt hydrates as phase change materials for photovoltaics thermal management

Choo

Wei

2021

Energy Science & Engineering

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“…Regarding the imposed external temperature, based on data from METEONORM software, the variation of the external temperature for extreme conditions of Khouribga city, vary sinusoidally between a minimum of 25°C and a maximum of 45°C, and is represented by Equation (7). However, the coefficient h out is taken from Reference [9] for a study in a similar hot climate, this latter is similar to climatic conditions of Khouribga city.…”

Section: Boundary Conditionsmentioning

confidence: 99%

“…Physical modeling and numerical analysis of heat transfer through hollow bricks containing PCM were performed by Mahdaoui et al; 9 the authors admitted that latent heat of fusion and peak of temperature vary inversely and significantly dampen the thermal wave. Kant et al 10 had thermally analyzed building bricks containing PCM in the cylindrical cavity of the bricks and their results indicate that the maximum reduction in heat flux is 8.31% with cupric acid.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of phase change material microencapsulated in a typical multilayer wall for a hot climatic zone

et al. 2021

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A phase change material (PCM) allows releasing and absorbing energy at the phase change transition. They are employed in building walls to maintain internal thermal comfort and optimize thermal energy storage.However, the hottest cities in Morocco suffer from overheating during peak days. Consequently in this article, the purpose is to evaluate the thermal performance of incorporation of the PCM n-octadecane paraffin in a typical multilayer wall at three different locations for a Moroccan hot climate zone. Numerical simulation is developed in a two-dimensional transient in addition to mathematical modeling using the enthalpy-porosity approach for three wall types. An implicit finite volume method is used for the numerical solution. The effects of PCM location, PCM type, and mass fraction (varying between 15% and 35%) are studied and compared with the reference case (without PCM). The evaluation of mass fraction variation is based on two determining factors of the wall panel's thermal inertia: the time delay and amplitude attenuation. The surface heat fluxes will then be used to quantify the capacity of the multilayer wall to store and release energy. The results showed that to ensure the thermal performance of the wall, it is useless to exceed 20% of mass fraction for all types of multilayer walls.

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“…39 The main benefit of integrating PCM thermal energy storage units with building technologies includes both their high storage capacities at a short temperature span and increased energy efficiency in new and refurbished buildings in combination with other active systems. Therefore, several researchers have studied the incorporation of PCM in building applications, such as wallboard building, [40][41][42] building envelope, [43][44][45][46][47] wall coatings, 48 concrete materials, 49-51 bricks, [52][53][54] and building roof for reducing the energy requirements. 55 In the present work, rigid polyurethane composites sandwiched between tin panels are prepared by integrating MF/LA-PA microcapsules into polyurethane foam.…”

Section: Introductionmentioning

confidence: 99%